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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-compat-ioctl32.c
blob61c2cd3be1090bdc72e68ee840d758b42b8b28c8
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 switch (kp->type) {
226 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
227 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
228 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
229 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
230 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
231 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
232 &up->fmt.pix_mp);
233 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
234 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
235 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
236 case V4L2_BUF_TYPE_VBI_CAPTURE:
237 case V4L2_BUF_TYPE_VBI_OUTPUT:
238 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
239 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
240 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
241 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
242 default:
243 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
244 kp->type);
245 return -EINVAL;
246 }
247 }
248
249 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
250 {
251 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
252 put_user(kp->type, &up->type))
253 return -EFAULT;
254 return __put_v4l2_format32(kp, up);
255 }
256
257 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
258 {
259 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
260 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
261 return -EFAULT;
262 return __put_v4l2_format32(&kp->format, &up->format);
263 }
264
265 struct v4l2_standard32 {
266 __u32 index;
267 compat_u64 id;
268 __u8 name[24];
269 struct v4l2_fract frameperiod; /* Frames, not fields */
270 __u32 framelines;
271 __u32 reserved[4];
272 };
273
274 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
275 {
276 /* other fields are not set by the user, nor used by the driver */
277 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
278 get_user(kp->index, &up->index))
279 return -EFAULT;
280 return 0;
281 }
282
283 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
284 {
285 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
286 put_user(kp->index, &up->index) ||
287 put_user(kp->id, &up->id) ||
288 copy_to_user(up->name, kp->name, 24) ||
289 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
290 put_user(kp->framelines, &up->framelines) ||
291 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
292 return -EFAULT;
293 return 0;
294 }
295
296 struct v4l2_plane32 {
297 __u32 bytesused;
298 __u32 length;
299 union {
300 __u32 mem_offset;
301 compat_long_t userptr;
302 __s32 fd;
303 } m;
304 __u32 data_offset;
305 __u32 reserved[11];
306 };
307
308 struct v4l2_buffer32 {
309 __u32 index;
310 __u32 type; /* enum v4l2_buf_type */
311 __u32 bytesused;
312 __u32 flags;
313 __u32 field; /* enum v4l2_field */
314 struct compat_timeval timestamp;
315 struct v4l2_timecode timecode;
316 __u32 sequence;
317
318 /* memory location */
319 __u32 memory; /* enum v4l2_memory */
320 union {
321 __u32 offset;
322 compat_long_t userptr;
323 compat_caddr_t planes;
324 __s32 fd;
325 } m;
326 __u32 length;
327 __u32 reserved2;
328 __u32 reserved;
329 };
330
331 static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
332 enum v4l2_memory memory)
333 {
334 void __user *up_pln;
335 compat_long_t p;
336
337 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
338 copy_in_user(&up->data_offset, &up32->data_offset,
339 sizeof(__u32)))
340 return -EFAULT;
341
342 if (memory == V4L2_MEMORY_USERPTR) {
343 if (get_user(p, &up32->m.userptr))
344 return -EFAULT;
345 up_pln = compat_ptr(p);
346 if (put_user((unsigned long)up_pln, &up->m.userptr))
347 return -EFAULT;
348 } else if (memory == V4L2_MEMORY_DMABUF) {
349 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
350 return -EFAULT;
351 } else {
352 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
353 sizeof(__u32)))
354 return -EFAULT;
355 }
356
357 return 0;
358 }
359
360 static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
361 enum v4l2_memory memory)
362 {
363 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
364 copy_in_user(&up32->data_offset, &up->data_offset,
365 sizeof(__u32)))
366 return -EFAULT;
367
368 /* For MMAP, driver might've set up the offset, so copy it back.
369 * USERPTR stays the same (was userspace-provided), so no copying. */
370 if (memory == V4L2_MEMORY_MMAP)
371 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
372 sizeof(__u32)))
373 return -EFAULT;
374 /* For DMABUF, driver might've set up the fd, so copy it back. */
375 if (memory == V4L2_MEMORY_DMABUF)
376 if (copy_in_user(&up32->m.fd, &up->m.fd,
377 sizeof(int)))
378 return -EFAULT;
379
380 return 0;
381 }
382
383 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
384 {
385 struct v4l2_plane32 __user *uplane32;
386 struct v4l2_plane __user *uplane;
387 compat_caddr_t p;
388 int num_planes;
389 int ret;
390
391 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
392 get_user(kp->index, &up->index) ||
393 get_user(kp->type, &up->type) ||
394 get_user(kp->flags, &up->flags) ||
395 get_user(kp->memory, &up->memory) ||
396 get_user(kp->length, &up->length))
397 return -EFAULT;
398
399 if (V4L2_TYPE_IS_OUTPUT(kp->type))
400 if (get_user(kp->bytesused, &up->bytesused) ||
401 get_user(kp->field, &up->field) ||
402 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
403 get_user(kp->timestamp.tv_usec,
404 &up->timestamp.tv_usec))
405 return -EFAULT;
406
407 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
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->m.offset, &up->m.offset))
441 return -EFAULT;
442 break;
443 case V4L2_MEMORY_USERPTR:
444 {
445 compat_long_t tmp;
446
447 if (get_user(tmp, &up->m.userptr))
448 return -EFAULT;
449
450 kp->m.userptr = (unsigned long)compat_ptr(tmp);
451 }
452 break;
453 case V4L2_MEMORY_OVERLAY:
454 if (get_user(kp->m.offset, &up->m.offset))
455 return -EFAULT;
456 break;
457 case V4L2_MEMORY_DMABUF:
458 if (get_user(kp->m.fd, &up->m.fd))
459 return -EFAULT;
460 break;
461 }
462 }
463
464 return 0;
465 }
466
467 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
468 {
469 struct v4l2_plane32 __user *uplane32;
470 struct v4l2_plane __user *uplane;
471 compat_caddr_t p;
472 int num_planes;
473 int ret;
474
475 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
476 put_user(kp->index, &up->index) ||
477 put_user(kp->type, &up->type) ||
478 put_user(kp->flags, &up->flags) ||
479 put_user(kp->memory, &up->memory))
480 return -EFAULT;
481
482 if (put_user(kp->bytesused, &up->bytesused) ||
483 put_user(kp->field, &up->field) ||
484 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
485 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
486 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
487 put_user(kp->sequence, &up->sequence) ||
488 put_user(kp->reserved2, &up->reserved2) ||
489 put_user(kp->reserved, &up->reserved) ||
490 put_user(kp->length, &up->length))
491 return -EFAULT;
492
493 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
494 num_planes = kp->length;
495 if (num_planes == 0)
496 return 0;
497
498 uplane = kp->m.planes;
499 if (get_user(p, &up->m.planes))
500 return -EFAULT;
501 uplane32 = compat_ptr(p);
502
503 while (--num_planes >= 0) {
504 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
505 if (ret)
506 return ret;
507 ++uplane;
508 ++uplane32;
509 }
510 } else {
511 switch (kp->memory) {
512 case V4L2_MEMORY_MMAP:
513 if (put_user(kp->m.offset, &up->m.offset))
514 return -EFAULT;
515 break;
516 case V4L2_MEMORY_USERPTR:
517 if (put_user(kp->m.userptr, &up->m.userptr))
518 return -EFAULT;
519 break;
520 case V4L2_MEMORY_OVERLAY:
521 if (put_user(kp->m.offset, &up->m.offset))
522 return -EFAULT;
523 break;
524 case V4L2_MEMORY_DMABUF:
525 if (put_user(kp->m.fd, &up->m.fd))
526 return -EFAULT;
527 break;
528 }
529 }
530
531 return 0;
532 }
533
534 struct v4l2_framebuffer32 {
535 __u32 capability;
536 __u32 flags;
537 compat_caddr_t base;
538 struct v4l2_pix_format fmt;
539 };
540
541 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
542 {
543 u32 tmp;
544
545 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
546 get_user(tmp, &up->base) ||
547 get_user(kp->capability, &up->capability) ||
548 get_user(kp->flags, &up->flags))
549 return -EFAULT;
550 kp->base = compat_ptr(tmp);
551 get_v4l2_pix_format(&kp->fmt, &up->fmt);
552 return 0;
553 }
554
555 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
556 {
557 u32 tmp = (u32)((unsigned long)kp->base);
558
559 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
560 put_user(tmp, &up->base) ||
561 put_user(kp->capability, &up->capability) ||
562 put_user(kp->flags, &up->flags))
563 return -EFAULT;
564 put_v4l2_pix_format(&kp->fmt, &up->fmt);
565 return 0;
566 }
567
568 struct v4l2_input32 {
569 __u32 index; /* Which input */
570 __u8 name[32]; /* Label */
571 __u32 type; /* Type of input */
572 __u32 audioset; /* Associated audios (bitfield) */
573 __u32 tuner; /* Associated tuner */
574 compat_u64 std;
575 __u32 status;
576 __u32 reserved[4];
577 };
578
579 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
580 Otherwise it is identical to the 32-bit version. */
581 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
582 {
583 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
584 return -EFAULT;
585 return 0;
586 }
587
588 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
589 {
590 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
591 return -EFAULT;
592 return 0;
593 }
594
595 struct v4l2_ext_controls32 {
596 __u32 ctrl_class;
597 __u32 count;
598 __u32 error_idx;
599 __u32 reserved[2];
600 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
601 };
602
603 struct v4l2_ext_control32 {
604 __u32 id;
605 __u32 size;
606 __u32 reserved2[1];
607 union {
608 __s32 value;
609 __s64 value64;
610 compat_caddr_t string; /* actually char * */
611 };
612 } __attribute__ ((packed));
613
614 /* The following function really belong in v4l2-common, but that causes
615 a circular dependency between modules. We need to think about this, but
616 for now this will do. */
617
618 /* Return non-zero if this control is a pointer type. Currently only
619 type STRING is a pointer type. */
620 static inline int ctrl_is_pointer(u32 id)
621 {
622 switch (id) {
623 case V4L2_CID_RDS_TX_PS_NAME:
624 case V4L2_CID_RDS_TX_RADIO_TEXT:
625 return 1;
626 default:
627 return 0;
628 }
629 }
630
631 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
632 {
633 struct v4l2_ext_control32 __user *ucontrols;
634 struct v4l2_ext_control __user *kcontrols;
635 int n;
636 compat_caddr_t p;
637
638 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
639 get_user(kp->ctrl_class, &up->ctrl_class) ||
640 get_user(kp->count, &up->count) ||
641 get_user(kp->error_idx, &up->error_idx) ||
642 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
643 return -EFAULT;
644 n = kp->count;
645 if (n == 0) {
646 kp->controls = NULL;
647 return 0;
648 }
649 if (get_user(p, &up->controls))
650 return -EFAULT;
651 ucontrols = compat_ptr(p);
652 if (!access_ok(VERIFY_READ, ucontrols,
653 n * sizeof(struct v4l2_ext_control32)))
654 return -EFAULT;
655 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
656 kp->controls = kcontrols;
657 while (--n >= 0) {
658 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
659 return -EFAULT;
660 if (ctrl_is_pointer(kcontrols->id)) {
661 void __user *s;
662
663 if (get_user(p, &ucontrols->string))
664 return -EFAULT;
665 s = compat_ptr(p);
666 if (put_user(s, &kcontrols->string))
667 return -EFAULT;
668 }
669 ucontrols++;
670 kcontrols++;
671 }
672 return 0;
673 }
674
675 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
676 {
677 struct v4l2_ext_control32 __user *ucontrols;
678 struct v4l2_ext_control __user *kcontrols = kp->controls;
679 int n = kp->count;
680 compat_caddr_t p;
681
682 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
683 put_user(kp->ctrl_class, &up->ctrl_class) ||
684 put_user(kp->count, &up->count) ||
685 put_user(kp->error_idx, &up->error_idx) ||
686 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
687 return -EFAULT;
688 if (!kp->count)
689 return 0;
690
691 if (get_user(p, &up->controls))
692 return -EFAULT;
693 ucontrols = compat_ptr(p);
694 if (!access_ok(VERIFY_WRITE, ucontrols,
695 n * sizeof(struct v4l2_ext_control32)))
696 return -EFAULT;
697
698 while (--n >= 0) {
699 unsigned size = sizeof(*ucontrols);
700
701 /* Do not modify the pointer when copying a pointer control.
702 The contents of the pointer was changed, not the pointer
703 itself. */
704 if (ctrl_is_pointer(kcontrols->id))
705 size -= sizeof(ucontrols->value64);
706 if (copy_in_user(ucontrols, kcontrols, size))
707 return -EFAULT;
708 ucontrols++;
709 kcontrols++;
710 }
711 return 0;
712 }
713
714 struct v4l2_event32 {
715 __u32 type;
716 union {
717 compat_s64 value64;
718 __u8 data[64];
719 } u;
720 __u32 pending;
721 __u32 sequence;
722 struct compat_timespec timestamp;
723 __u32 id;
724 __u32 reserved[8];
725 };
726
727 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
728 {
729 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
730 put_user(kp->type, &up->type) ||
731 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
732 put_user(kp->pending, &up->pending) ||
733 put_user(kp->sequence, &up->sequence) ||
734 put_compat_timespec(&kp->timestamp, &up->timestamp) ||
735 put_user(kp->id, &up->id) ||
736 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
737 return -EFAULT;
738 return 0;
739 }
740
741 struct v4l2_subdev_edid32 {
742 __u32 pad;
743 __u32 start_block;
744 __u32 blocks;
745 __u32 reserved[5];
746 compat_caddr_t edid;
747 };
748
749 static int get_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
750 {
751 u32 tmp;
752
753 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_subdev_edid32)) ||
754 get_user(kp->pad, &up->pad) ||
755 get_user(kp->start_block, &up->start_block) ||
756 get_user(kp->blocks, &up->blocks) ||
757 get_user(tmp, &up->edid) ||
758 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
759 return -EFAULT;
760 kp->edid = compat_ptr(tmp);
761 return 0;
762 }
763
764 static int put_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
765 {
766 u32 tmp = (u32)((unsigned long)kp->edid);
767
768 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_subdev_edid32)) ||
769 put_user(kp->pad, &up->pad) ||
770 put_user(kp->start_block, &up->start_block) ||
771 put_user(kp->blocks, &up->blocks) ||
772 put_user(tmp, &up->edid) ||
773 copy_to_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
774 return -EFAULT;
775 return 0;
776 }
777
778
779 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
780 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
781 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
782 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
783 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
784 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
785 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
786 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
787 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
788 #define VIDIOC_SUBDEV_G_EDID32 _IOWR('V', 40, struct v4l2_subdev_edid32)
789 #define VIDIOC_SUBDEV_S_EDID32 _IOWR('V', 41, struct v4l2_subdev_edid32)
790 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
791 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
792 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
793 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
794 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
795 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
796 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
797
798 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
799 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
800 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
801 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
802 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
803 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
804 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
805
806 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
807 {
808 union {
809 struct v4l2_format v2f;
810 struct v4l2_buffer v2b;
811 struct v4l2_framebuffer v2fb;
812 struct v4l2_input v2i;
813 struct v4l2_standard v2s;
814 struct v4l2_ext_controls v2ecs;
815 struct v4l2_event v2ev;
816 struct v4l2_create_buffers v2crt;
817 struct v4l2_subdev_edid v2edid;
818 unsigned long vx;
819 int vi;
820 } karg;
821 void __user *up = compat_ptr(arg);
822 int compatible_arg = 1;
823 long err = 0;
824
825 /* First, convert the command. */
826 switch (cmd) {
827 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
828 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
829 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
830 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
831 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
832 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
833 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
834 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
835 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
836 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
837 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
838 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
839 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
840 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
841 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
842 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
843 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
844 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
845 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
846 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
847 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
848 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
849 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
850 case VIDIOC_SUBDEV_G_EDID32: cmd = VIDIOC_SUBDEV_G_EDID; break;
851 case VIDIOC_SUBDEV_S_EDID32: cmd = VIDIOC_SUBDEV_S_EDID; break;
852 }
853
854 switch (cmd) {
855 case VIDIOC_OVERLAY:
856 case VIDIOC_STREAMON:
857 case VIDIOC_STREAMOFF:
858 case VIDIOC_S_INPUT:
859 case VIDIOC_S_OUTPUT:
860 err = get_user(karg.vi, (s32 __user *)up);
861 compatible_arg = 0;
862 break;
863
864 case VIDIOC_G_INPUT:
865 case VIDIOC_G_OUTPUT:
866 compatible_arg = 0;
867 break;
868
869 case VIDIOC_SUBDEV_G_EDID:
870 case VIDIOC_SUBDEV_S_EDID:
871 err = get_v4l2_subdev_edid32(&karg.v2edid, up);
872 compatible_arg = 0;
873 break;
874
875 case VIDIOC_G_FMT:
876 case VIDIOC_S_FMT:
877 case VIDIOC_TRY_FMT:
878 err = get_v4l2_format32(&karg.v2f, up);
879 compatible_arg = 0;
880 break;
881
882 case VIDIOC_CREATE_BUFS:
883 err = get_v4l2_create32(&karg.v2crt, up);
884 compatible_arg = 0;
885 break;
886
887 case VIDIOC_PREPARE_BUF:
888 case VIDIOC_QUERYBUF:
889 case VIDIOC_QBUF:
890 case VIDIOC_DQBUF:
891 err = get_v4l2_buffer32(&karg.v2b, up);
892 compatible_arg = 0;
893 break;
894
895 case VIDIOC_S_FBUF:
896 err = get_v4l2_framebuffer32(&karg.v2fb, up);
897 compatible_arg = 0;
898 break;
899
900 case VIDIOC_G_FBUF:
901 compatible_arg = 0;
902 break;
903
904 case VIDIOC_ENUMSTD:
905 err = get_v4l2_standard32(&karg.v2s, up);
906 compatible_arg = 0;
907 break;
908
909 case VIDIOC_ENUMINPUT:
910 err = get_v4l2_input32(&karg.v2i, up);
911 compatible_arg = 0;
912 break;
913
914 case VIDIOC_G_EXT_CTRLS:
915 case VIDIOC_S_EXT_CTRLS:
916 case VIDIOC_TRY_EXT_CTRLS:
917 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
918 compatible_arg = 0;
919 break;
920 case VIDIOC_DQEVENT:
921 compatible_arg = 0;
922 break;
923 }
924 if (err)
925 return err;
926
927 if (compatible_arg)
928 err = native_ioctl(file, cmd, (unsigned long)up);
929 else {
930 mm_segment_t old_fs = get_fs();
931
932 set_fs(KERNEL_DS);
933 err = native_ioctl(file, cmd, (unsigned long)&karg);
934 set_fs(old_fs);
935 }
936
937 /* Special case: even after an error we need to put the
938 results back for these ioctls since the error_idx will
939 contain information on which control failed. */
940 switch (cmd) {
941 case VIDIOC_G_EXT_CTRLS:
942 case VIDIOC_S_EXT_CTRLS:
943 case VIDIOC_TRY_EXT_CTRLS:
944 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
945 err = -EFAULT;
946 break;
947 }
948 if (err)
949 return err;
950
951 switch (cmd) {
952 case VIDIOC_S_INPUT:
953 case VIDIOC_S_OUTPUT:
954 case VIDIOC_G_INPUT:
955 case VIDIOC_G_OUTPUT:
956 err = put_user(((s32)karg.vi), (s32 __user *)up);
957 break;
958
959 case VIDIOC_G_FBUF:
960 err = put_v4l2_framebuffer32(&karg.v2fb, up);
961 break;
962
963 case VIDIOC_DQEVENT:
964 err = put_v4l2_event32(&karg.v2ev, up);
965 break;
966
967 case VIDIOC_SUBDEV_G_EDID:
968 case VIDIOC_SUBDEV_S_EDID:
969 err = put_v4l2_subdev_edid32(&karg.v2edid, up);
970 break;
971
972 case VIDIOC_G_FMT:
973 case VIDIOC_S_FMT:
974 case VIDIOC_TRY_FMT:
975 err = put_v4l2_format32(&karg.v2f, up);
976 break;
977
978 case VIDIOC_CREATE_BUFS:
979 err = put_v4l2_create32(&karg.v2crt, up);
980 break;
981
982 case VIDIOC_QUERYBUF:
983 case VIDIOC_QBUF:
984 case VIDIOC_DQBUF:
985 err = put_v4l2_buffer32(&karg.v2b, up);
986 break;
987
988 case VIDIOC_ENUMSTD:
989 err = put_v4l2_standard32(&karg.v2s, up);
990 break;
991
992 case VIDIOC_ENUMINPUT:
993 err = put_v4l2_input32(&karg.v2i, up);
994 break;
995 }
996 return err;
997 }
998
999 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1000 {
1001 struct video_device *vdev = video_devdata(file);
1002 long ret = -ENOIOCTLCMD;
1003
1004 if (!file->f_op->unlocked_ioctl)
1005 return ret;
1006
1007 switch (cmd) {
1008 case VIDIOC_QUERYCAP:
1009 case VIDIOC_RESERVED:
1010 case VIDIOC_ENUM_FMT:
1011 case VIDIOC_G_FMT32:
1012 case VIDIOC_S_FMT32:
1013 case VIDIOC_REQBUFS:
1014 case VIDIOC_QUERYBUF32:
1015 case VIDIOC_G_FBUF32:
1016 case VIDIOC_S_FBUF32:
1017 case VIDIOC_OVERLAY32:
1018 case VIDIOC_QBUF32:
1019 case VIDIOC_EXPBUF:
1020 case VIDIOC_DQBUF32:
1021 case VIDIOC_STREAMON32:
1022 case VIDIOC_STREAMOFF32:
1023 case VIDIOC_G_PARM:
1024 case VIDIOC_S_PARM:
1025 case VIDIOC_G_STD:
1026 case VIDIOC_S_STD:
1027 case VIDIOC_ENUMSTD32:
1028 case VIDIOC_ENUMINPUT32:
1029 case VIDIOC_G_CTRL:
1030 case VIDIOC_S_CTRL:
1031 case VIDIOC_G_TUNER:
1032 case VIDIOC_S_TUNER:
1033 case VIDIOC_G_AUDIO:
1034 case VIDIOC_S_AUDIO:
1035 case VIDIOC_QUERYCTRL:
1036 case VIDIOC_QUERYMENU:
1037 case VIDIOC_G_INPUT32:
1038 case VIDIOC_S_INPUT32:
1039 case VIDIOC_G_OUTPUT32:
1040 case VIDIOC_S_OUTPUT32:
1041 case VIDIOC_ENUMOUTPUT:
1042 case VIDIOC_G_AUDOUT:
1043 case VIDIOC_S_AUDOUT:
1044 case VIDIOC_G_MODULATOR:
1045 case VIDIOC_S_MODULATOR:
1046 case VIDIOC_S_FREQUENCY:
1047 case VIDIOC_G_FREQUENCY:
1048 case VIDIOC_CROPCAP:
1049 case VIDIOC_G_CROP:
1050 case VIDIOC_S_CROP:
1051 case VIDIOC_G_SELECTION:
1052 case VIDIOC_S_SELECTION:
1053 case VIDIOC_G_JPEGCOMP:
1054 case VIDIOC_S_JPEGCOMP:
1055 case VIDIOC_QUERYSTD:
1056 case VIDIOC_TRY_FMT32:
1057 case VIDIOC_ENUMAUDIO:
1058 case VIDIOC_ENUMAUDOUT:
1059 case VIDIOC_G_PRIORITY:
1060 case VIDIOC_S_PRIORITY:
1061 case VIDIOC_G_SLICED_VBI_CAP:
1062 case VIDIOC_LOG_STATUS:
1063 case VIDIOC_G_EXT_CTRLS32:
1064 case VIDIOC_S_EXT_CTRLS32:
1065 case VIDIOC_TRY_EXT_CTRLS32:
1066 case VIDIOC_ENUM_FRAMESIZES:
1067 case VIDIOC_ENUM_FRAMEINTERVALS:
1068 case VIDIOC_G_ENC_INDEX:
1069 case VIDIOC_ENCODER_CMD:
1070 case VIDIOC_TRY_ENCODER_CMD:
1071 case VIDIOC_DECODER_CMD:
1072 case VIDIOC_TRY_DECODER_CMD:
1073 case VIDIOC_DBG_S_REGISTER:
1074 case VIDIOC_DBG_G_REGISTER:
1075 case VIDIOC_S_HW_FREQ_SEEK:
1076 case VIDIOC_S_DV_TIMINGS:
1077 case VIDIOC_G_DV_TIMINGS:
1078 case VIDIOC_DQEVENT:
1079 case VIDIOC_DQEVENT32:
1080 case VIDIOC_SUBSCRIBE_EVENT:
1081 case VIDIOC_UNSUBSCRIBE_EVENT:
1082 case VIDIOC_CREATE_BUFS32:
1083 case VIDIOC_PREPARE_BUF32:
1084 case VIDIOC_ENUM_DV_TIMINGS:
1085 case VIDIOC_QUERY_DV_TIMINGS:
1086 case VIDIOC_DV_TIMINGS_CAP:
1087 case VIDIOC_ENUM_FREQ_BANDS:
1088 case VIDIOC_SUBDEV_G_EDID32:
1089 case VIDIOC_SUBDEV_S_EDID32:
1090 ret = do_video_ioctl(file, cmd, arg);
1091 break;
1092
1093 default:
1094 if (vdev->fops->compat_ioctl32)
1095 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1096
1097 if (ret == -ENOIOCTLCMD)
1098 printk(KERN_WARNING "compat_ioctl32: "
1099 "unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1100 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd),
1101 cmd);
1102 break;
1103 }
1104 return ret;
1105 }
1106 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux with added FPC-III support