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Merge tag 'remoteproc-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad...
[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 if (get_user(kp->type, &up->type))
182 return -EFAULT;
183
184 switch (kp->type) {
185 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
186 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
187 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
188 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
189 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
190 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
191 &up->fmt.pix_mp);
192 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
193 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
194 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
195 case V4L2_BUF_TYPE_VBI_CAPTURE:
196 case V4L2_BUF_TYPE_VBI_OUTPUT:
197 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
198 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
199 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
200 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
201 default:
202 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
203 kp->type);
204 return -EINVAL;
205 }
206 }
207
208 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
209 {
210 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)))
211 return -EFAULT;
212 return __get_v4l2_format32(kp, up);
213 }
214
215 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
216 {
217 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
218 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
219 return -EFAULT;
220 return __get_v4l2_format32(&kp->format, &up->format);
221 }
222
223 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
224 {
225 if (put_user(kp->type, &up->type))
226 return -EFAULT;
227
228 switch (kp->type) {
229 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
230 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
231 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
232 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
233 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
234 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
235 &up->fmt.pix_mp);
236 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
237 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
238 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
239 case V4L2_BUF_TYPE_VBI_CAPTURE:
240 case V4L2_BUF_TYPE_VBI_OUTPUT:
241 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
242 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
243 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
244 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
245 default:
246 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
247 kp->type);
248 return -EINVAL;
249 }
250 }
251
252 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
253 {
254 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)))
255 return -EFAULT;
256 return __put_v4l2_format32(kp, up);
257 }
258
259 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
260 {
261 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
262 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)))
263 return -EFAULT;
264 return __put_v4l2_format32(&kp->format, &up->format);
265 }
266
267 struct v4l2_standard32 {
268 __u32 index;
269 __u32 id[2]; /* __u64 would get the alignment wrong */
270 __u8 name[24];
271 struct v4l2_fract frameperiod; /* Frames, not fields */
272 __u32 framelines;
273 __u32 reserved[4];
274 };
275
276 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
277 {
278 /* other fields are not set by the user, nor used by the driver */
279 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
280 get_user(kp->index, &up->index))
281 return -EFAULT;
282 return 0;
283 }
284
285 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
286 {
287 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
288 put_user(kp->index, &up->index) ||
289 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
290 copy_to_user(up->name, kp->name, 24) ||
291 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
292 put_user(kp->framelines, &up->framelines) ||
293 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
294 return -EFAULT;
295 return 0;
296 }
297
298 struct v4l2_plane32 {
299 __u32 bytesused;
300 __u32 length;
301 union {
302 __u32 mem_offset;
303 compat_long_t userptr;
304 __s32 fd;
305 } m;
306 __u32 data_offset;
307 __u32 reserved[11];
308 };
309
310 struct v4l2_buffer32 {
311 __u32 index;
312 __u32 type; /* enum v4l2_buf_type */
313 __u32 bytesused;
314 __u32 flags;
315 __u32 field; /* enum v4l2_field */
316 struct compat_timeval timestamp;
317 struct v4l2_timecode timecode;
318 __u32 sequence;
319
320 /* memory location */
321 __u32 memory; /* enum v4l2_memory */
322 union {
323 __u32 offset;
324 compat_long_t userptr;
325 compat_caddr_t planes;
326 __s32 fd;
327 } m;
328 __u32 length;
329 __u32 reserved2;
330 __u32 reserved;
331 };
332
333 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
334 enum v4l2_memory memory)
335 {
336 void __user *up_pln;
337 compat_long_t p;
338
339 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
340 copy_in_user(&up->data_offset, &up32->data_offset,
341 sizeof(__u32)))
342 return -EFAULT;
343
344 if (memory == V4L2_MEMORY_USERPTR) {
345 if (get_user(p, &up32->m.userptr))
346 return -EFAULT;
347 up_pln = compat_ptr(p);
348 if (put_user((unsigned long)up_pln, &up->m.userptr))
349 return -EFAULT;
350 } else if (memory == V4L2_MEMORY_DMABUF) {
351 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
352 return -EFAULT;
353 } else {
354 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
355 sizeof(__u32)))
356 return -EFAULT;
357 }
358
359 return 0;
360 }
361
362 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
363 enum v4l2_memory memory)
364 {
365 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
366 copy_in_user(&up32->data_offset, &up->data_offset,
367 sizeof(__u32)))
368 return -EFAULT;
369
370 /* For MMAP, driver might've set up the offset, so copy it back.
371 * USERPTR stays the same (was userspace-provided), so no copying. */
372 if (memory == V4L2_MEMORY_MMAP)
373 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
374 sizeof(__u32)))
375 return -EFAULT;
376 /* For DMABUF, driver might've set up the fd, so copy it back. */
377 if (memory == V4L2_MEMORY_DMABUF)
378 if (copy_in_user(&up32->m.fd, &up->m.fd,
379 sizeof(int)))
380 return -EFAULT;
381
382 return 0;
383 }
384
385 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
386 {
387 struct v4l2_plane32 __user *uplane32;
388 struct v4l2_plane __user *uplane;
389 compat_caddr_t p;
390 int num_planes;
391 int ret;
392
393 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
394 get_user(kp->index, &up->index) ||
395 get_user(kp->type, &up->type) ||
396 get_user(kp->flags, &up->flags) ||
397 get_user(kp->memory, &up->memory))
398 return -EFAULT;
399
400 if (V4L2_TYPE_IS_OUTPUT(kp->type))
401 if (get_user(kp->bytesused, &up->bytesused) ||
402 get_user(kp->field, &up->field) ||
403 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
404 get_user(kp->timestamp.tv_usec,
405 &up->timestamp.tv_usec))
406 return -EFAULT;
407
408 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
409 if (get_user(kp->length, &up->length))
410 return -EFAULT;
411
412 num_planes = kp->length;
413 if (num_planes == 0) {
414 kp->m.planes = NULL;
415 /* num_planes == 0 is legal, e.g. when userspace doesn't
416 * need planes array on DQBUF*/
417 return 0;
418 }
419
420 if (get_user(p, &up->m.planes))
421 return -EFAULT;
422
423 uplane32 = compat_ptr(p);
424 if (!access_ok(VERIFY_READ, uplane32,
425 num_planes * sizeof(struct v4l2_plane32)))
426 return -EFAULT;
427
428 /* We don't really care if userspace decides to kill itself
429 * by passing a very big num_planes value */
430 uplane = compat_alloc_user_space(num_planes *
431 sizeof(struct v4l2_plane));
432 kp->m.planes = (__force struct v4l2_plane *)uplane;
433
434 while (--num_planes >= 0) {
435 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
436 if (ret)
437 return ret;
438 ++uplane;
439 ++uplane32;
440 }
441 } else {
442 switch (kp->memory) {
443 case V4L2_MEMORY_MMAP:
444 if (get_user(kp->length, &up->length) ||
445 get_user(kp->m.offset, &up->m.offset))
446 return -EFAULT;
447 break;
448 case V4L2_MEMORY_USERPTR:
449 {
450 compat_long_t tmp;
451
452 if (get_user(kp->length, &up->length) ||
453 get_user(tmp, &up->m.userptr))
454 return -EFAULT;
455
456 kp->m.userptr = (unsigned long)compat_ptr(tmp);
457 }
458 break;
459 case V4L2_MEMORY_OVERLAY:
460 if (get_user(kp->m.offset, &up->m.offset))
461 return -EFAULT;
462 break;
463 case V4L2_MEMORY_DMABUF:
464 if (get_user(kp->m.fd, &up->m.fd))
465 return -EFAULT;
466 break;
467 }
468 }
469
470 return 0;
471 }
472
473 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
474 {
475 struct v4l2_plane32 __user *uplane32;
476 struct v4l2_plane __user *uplane;
477 compat_caddr_t p;
478 int num_planes;
479 int ret;
480
481 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
482 put_user(kp->index, &up->index) ||
483 put_user(kp->type, &up->type) ||
484 put_user(kp->flags, &up->flags) ||
485 put_user(kp->memory, &up->memory))
486 return -EFAULT;
487
488 if (put_user(kp->bytesused, &up->bytesused) ||
489 put_user(kp->field, &up->field) ||
490 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
491 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
492 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
493 put_user(kp->sequence, &up->sequence) ||
494 put_user(kp->reserved2, &up->reserved2) ||
495 put_user(kp->reserved, &up->reserved))
496 return -EFAULT;
497
498 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
499 num_planes = kp->length;
500 if (num_planes == 0)
501 return 0;
502
503 uplane = (__force struct v4l2_plane __user *)kp->m.planes;
504 if (get_user(p, &up->m.planes))
505 return -EFAULT;
506 uplane32 = compat_ptr(p);
507
508 while (--num_planes >= 0) {
509 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
510 if (ret)
511 return ret;
512 ++uplane;
513 ++uplane32;
514 }
515 } else {
516 switch (kp->memory) {
517 case V4L2_MEMORY_MMAP:
518 if (put_user(kp->length, &up->length) ||
519 put_user(kp->m.offset, &up->m.offset))
520 return -EFAULT;
521 break;
522 case V4L2_MEMORY_USERPTR:
523 if (put_user(kp->length, &up->length) ||
524 put_user(kp->m.userptr, &up->m.userptr))
525 return -EFAULT;
526 break;
527 case V4L2_MEMORY_OVERLAY:
528 if (put_user(kp->m.offset, &up->m.offset))
529 return -EFAULT;
530 break;
531 case V4L2_MEMORY_DMABUF:
532 if (put_user(kp->m.fd, &up->m.fd))
533 return -EFAULT;
534 break;
535 }
536 }
537
538 return 0;
539 }
540
541 struct v4l2_framebuffer32 {
542 __u32 capability;
543 __u32 flags;
544 compat_caddr_t base;
545 struct {
546 __u32 width;
547 __u32 height;
548 __u32 pixelformat;
549 __u32 field;
550 __u32 bytesperline;
551 __u32 sizeimage;
552 __u32 colorspace;
553 __u32 priv;
554 } fmt;
555 };
556
557 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
558 {
559 u32 tmp;
560
561 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
562 get_user(tmp, &up->base) ||
563 get_user(kp->capability, &up->capability) ||
564 get_user(kp->flags, &up->flags) ||
565 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
566 return -EFAULT;
567 kp->base = (__force void *)compat_ptr(tmp);
568 return 0;
569 }
570
571 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
572 {
573 u32 tmp = (u32)((unsigned long)kp->base);
574
575 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
576 put_user(tmp, &up->base) ||
577 put_user(kp->capability, &up->capability) ||
578 put_user(kp->flags, &up->flags) ||
579 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
580 return -EFAULT;
581 return 0;
582 }
583
584 struct v4l2_input32 {
585 __u32 index; /* Which input */
586 __u8 name[32]; /* Label */
587 __u32 type; /* Type of input */
588 __u32 audioset; /* Associated audios (bitfield) */
589 __u32 tuner; /* Associated tuner */
590 v4l2_std_id std;
591 __u32 status;
592 __u32 reserved[4];
593 } __attribute__ ((packed));
594
595 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
596 Otherwise it is identical to the 32-bit version. */
597 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
598 {
599 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
600 return -EFAULT;
601 return 0;
602 }
603
604 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
605 {
606 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
607 return -EFAULT;
608 return 0;
609 }
610
611 struct v4l2_ext_controls32 {
612 __u32 ctrl_class;
613 __u32 count;
614 __u32 error_idx;
615 __u32 reserved[2];
616 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
617 };
618
619 struct v4l2_ext_control32 {
620 __u32 id;
621 __u32 size;
622 __u32 reserved2[1];
623 union {
624 __s32 value;
625 __s64 value64;
626 compat_caddr_t string; /* actually char * */
627 };
628 } __attribute__ ((packed));
629
630 /* The following function really belong in v4l2-common, but that causes
631 a circular dependency between modules. We need to think about this, but
632 for now this will do. */
633
634 /* Return non-zero if this control is a pointer type. Currently only
635 type STRING is a pointer type. */
636 static inline int ctrl_is_pointer(u32 id)
637 {
638 switch (id) {
639 case V4L2_CID_RDS_TX_PS_NAME:
640 case V4L2_CID_RDS_TX_RADIO_TEXT:
641 return 1;
642 default:
643 return 0;
644 }
645 }
646
647 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
648 {
649 struct v4l2_ext_control32 __user *ucontrols;
650 struct v4l2_ext_control __user *kcontrols;
651 int n;
652 compat_caddr_t p;
653
654 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
655 get_user(kp->ctrl_class, &up->ctrl_class) ||
656 get_user(kp->count, &up->count) ||
657 get_user(kp->error_idx, &up->error_idx) ||
658 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
659 return -EFAULT;
660 n = kp->count;
661 if (n == 0) {
662 kp->controls = NULL;
663 return 0;
664 }
665 if (get_user(p, &up->controls))
666 return -EFAULT;
667 ucontrols = compat_ptr(p);
668 if (!access_ok(VERIFY_READ, ucontrols,
669 n * sizeof(struct v4l2_ext_control32)))
670 return -EFAULT;
671 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
672 kp->controls = (__force struct v4l2_ext_control *)kcontrols;
673 while (--n >= 0) {
674 u32 id;
675
676 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
677 return -EFAULT;
678 if (get_user(id, &kcontrols->id))
679 return -EFAULT;
680 if (ctrl_is_pointer(id)) {
681 void __user *s;
682
683 if (get_user(p, &ucontrols->string))
684 return -EFAULT;
685 s = compat_ptr(p);
686 if (put_user(s, &kcontrols->string))
687 return -EFAULT;
688 }
689 ucontrols++;
690 kcontrols++;
691 }
692 return 0;
693 }
694
695 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
696 {
697 struct v4l2_ext_control32 __user *ucontrols;
698 struct v4l2_ext_control __user *kcontrols =
699 (__force struct v4l2_ext_control __user *)kp->controls;
700 int n = kp->count;
701 compat_caddr_t p;
702
703 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
704 put_user(kp->ctrl_class, &up->ctrl_class) ||
705 put_user(kp->count, &up->count) ||
706 put_user(kp->error_idx, &up->error_idx) ||
707 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
708 return -EFAULT;
709 if (!kp->count)
710 return 0;
711
712 if (get_user(p, &up->controls))
713 return -EFAULT;
714 ucontrols = compat_ptr(p);
715 if (!access_ok(VERIFY_WRITE, ucontrols,
716 n * sizeof(struct v4l2_ext_control32)))
717 return -EFAULT;
718
719 while (--n >= 0) {
720 unsigned size = sizeof(*ucontrols);
721 u32 id;
722
723 if (get_user(id, &kcontrols->id))
724 return -EFAULT;
725 /* Do not modify the pointer when copying a pointer control.
726 The contents of the pointer was changed, not the pointer
727 itself. */
728 if (ctrl_is_pointer(id))
729 size -= sizeof(ucontrols->value64);
730 if (copy_in_user(ucontrols, kcontrols, size))
731 return -EFAULT;
732 ucontrols++;
733 kcontrols++;
734 }
735 return 0;
736 }
737
738 struct v4l2_event32 {
739 __u32 type;
740 union {
741 __u8 data[64];
742 } u;
743 __u32 pending;
744 __u32 sequence;
745 struct compat_timespec timestamp;
746 __u32 id;
747 __u32 reserved[8];
748 };
749
750 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
751 {
752 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
753 put_user(kp->type, &up->type) ||
754 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
755 put_user(kp->pending, &up->pending) ||
756 put_user(kp->sequence, &up->sequence) ||
757 compat_put_timespec(&kp->timestamp, &up->timestamp) ||
758 put_user(kp->id, &up->id) ||
759 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
760 return -EFAULT;
761 return 0;
762 }
763
764 struct v4l2_edid32 {
765 __u32 pad;
766 __u32 start_block;
767 __u32 blocks;
768 __u32 reserved[5];
769 compat_caddr_t edid;
770 };
771
772 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
773 {
774 u32 tmp;
775
776 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
777 get_user(kp->pad, &up->pad) ||
778 get_user(kp->start_block, &up->start_block) ||
779 get_user(kp->blocks, &up->blocks) ||
780 get_user(tmp, &up->edid) ||
781 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
782 return -EFAULT;
783 kp->edid = (__force u8 *)compat_ptr(tmp);
784 return 0;
785 }
786
787 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
788 {
789 u32 tmp = (u32)((unsigned long)kp->edid);
790
791 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
792 put_user(kp->pad, &up->pad) ||
793 put_user(kp->start_block, &up->start_block) ||
794 put_user(kp->blocks, &up->blocks) ||
795 put_user(tmp, &up->edid) ||
796 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
797 return -EFAULT;
798 return 0;
799 }
800
801
802 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
803 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
804 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
805 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
806 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
807 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
808 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
809 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
810 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
811 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
812 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
813 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
814 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
815 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
816 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
817 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
818 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
819 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
820
821 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
822 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
823 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
824 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
825 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
826 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
827 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
828
829 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
830 {
831 union {
832 struct v4l2_format v2f;
833 struct v4l2_buffer v2b;
834 struct v4l2_framebuffer v2fb;
835 struct v4l2_input v2i;
836 struct v4l2_standard v2s;
837 struct v4l2_ext_controls v2ecs;
838 struct v4l2_event v2ev;
839 struct v4l2_create_buffers v2crt;
840 struct v4l2_edid v2edid;
841 unsigned long vx;
842 int vi;
843 } karg;
844 void __user *up = compat_ptr(arg);
845 int compatible_arg = 1;
846 long err = 0;
847
848 /* First, convert the command. */
849 switch (cmd) {
850 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
851 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
852 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
853 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
854 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
855 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
856 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
857 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
858 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
859 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
860 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
861 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
862 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
863 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
864 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
865 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
866 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
867 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
868 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
869 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
870 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
871 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
872 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
873 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
874 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
875 }
876
877 switch (cmd) {
878 case VIDIOC_OVERLAY:
879 case VIDIOC_STREAMON:
880 case VIDIOC_STREAMOFF:
881 case VIDIOC_S_INPUT:
882 case VIDIOC_S_OUTPUT:
883 err = get_user(karg.vi, (s32 __user *)up);
884 compatible_arg = 0;
885 break;
886
887 case VIDIOC_G_INPUT:
888 case VIDIOC_G_OUTPUT:
889 compatible_arg = 0;
890 break;
891
892 case VIDIOC_G_EDID:
893 case VIDIOC_S_EDID:
894 err = get_v4l2_edid32(&karg.v2edid, up);
895 compatible_arg = 0;
896 break;
897
898 case VIDIOC_G_FMT:
899 case VIDIOC_S_FMT:
900 case VIDIOC_TRY_FMT:
901 err = get_v4l2_format32(&karg.v2f, up);
902 compatible_arg = 0;
903 break;
904
905 case VIDIOC_CREATE_BUFS:
906 err = get_v4l2_create32(&karg.v2crt, up);
907 compatible_arg = 0;
908 break;
909
910 case VIDIOC_PREPARE_BUF:
911 case VIDIOC_QUERYBUF:
912 case VIDIOC_QBUF:
913 case VIDIOC_DQBUF:
914 err = get_v4l2_buffer32(&karg.v2b, up);
915 compatible_arg = 0;
916 break;
917
918 case VIDIOC_S_FBUF:
919 err = get_v4l2_framebuffer32(&karg.v2fb, up);
920 compatible_arg = 0;
921 break;
922
923 case VIDIOC_G_FBUF:
924 compatible_arg = 0;
925 break;
926
927 case VIDIOC_ENUMSTD:
928 err = get_v4l2_standard32(&karg.v2s, up);
929 compatible_arg = 0;
930 break;
931
932 case VIDIOC_ENUMINPUT:
933 err = get_v4l2_input32(&karg.v2i, up);
934 compatible_arg = 0;
935 break;
936
937 case VIDIOC_G_EXT_CTRLS:
938 case VIDIOC_S_EXT_CTRLS:
939 case VIDIOC_TRY_EXT_CTRLS:
940 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
941 compatible_arg = 0;
942 break;
943 case VIDIOC_DQEVENT:
944 compatible_arg = 0;
945 break;
946 }
947 if (err)
948 return err;
949
950 if (compatible_arg)
951 err = native_ioctl(file, cmd, (unsigned long)up);
952 else {
953 mm_segment_t old_fs = get_fs();
954
955 set_fs(KERNEL_DS);
956 err = native_ioctl(file, cmd, (unsigned long)&karg);
957 set_fs(old_fs);
958 }
959
960 /* Special case: even after an error we need to put the
961 results back for these ioctls since the error_idx will
962 contain information on which control failed. */
963 switch (cmd) {
964 case VIDIOC_G_EXT_CTRLS:
965 case VIDIOC_S_EXT_CTRLS:
966 case VIDIOC_TRY_EXT_CTRLS:
967 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
968 err = -EFAULT;
969 break;
970 }
971 if (err)
972 return err;
973
974 switch (cmd) {
975 case VIDIOC_S_INPUT:
976 case VIDIOC_S_OUTPUT:
977 case VIDIOC_G_INPUT:
978 case VIDIOC_G_OUTPUT:
979 err = put_user(((s32)karg.vi), (s32 __user *)up);
980 break;
981
982 case VIDIOC_G_FBUF:
983 err = put_v4l2_framebuffer32(&karg.v2fb, up);
984 break;
985
986 case VIDIOC_DQEVENT:
987 err = put_v4l2_event32(&karg.v2ev, up);
988 break;
989
990 case VIDIOC_G_EDID:
991 case VIDIOC_S_EDID:
992 err = put_v4l2_edid32(&karg.v2edid, up);
993 break;
994
995 case VIDIOC_G_FMT:
996 case VIDIOC_S_FMT:
997 case VIDIOC_TRY_FMT:
998 err = put_v4l2_format32(&karg.v2f, up);
999 break;
1000
1001 case VIDIOC_CREATE_BUFS:
1002 err = put_v4l2_create32(&karg.v2crt, up);
1003 break;
1004
1005 case VIDIOC_QUERYBUF:
1006 case VIDIOC_QBUF:
1007 case VIDIOC_DQBUF:
1008 err = put_v4l2_buffer32(&karg.v2b, up);
1009 break;
1010
1011 case VIDIOC_ENUMSTD:
1012 err = put_v4l2_standard32(&karg.v2s, up);
1013 break;
1014
1015 case VIDIOC_ENUMINPUT:
1016 err = put_v4l2_input32(&karg.v2i, up);
1017 break;
1018 }
1019 return err;
1020 }
1021
1022 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1023 {
1024 struct video_device *vdev = video_devdata(file);
1025 long ret = -ENOIOCTLCMD;
1026
1027 if (!file->f_op->unlocked_ioctl)
1028 return ret;
1029
1030 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1031 ret = do_video_ioctl(file, cmd, arg);
1032 else if (vdev->fops->compat_ioctl32)
1033 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1034
1035 if (ret == -ENOIOCTLCMD)
1036 pr_warn("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1037 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1038 return ret;
1039 }
1040 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux kernel - Deliverables
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