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192.168.1.100 / R306 / 824eb0c6ade808c4501e62fbcf0025f4e694cd11 / . / ap / os / linux / linux-3.4.x / drivers / media / video / v4l2-compat-ioctl32.c
blob: 2829d256e4b7f2ed68905afb30bd44414e1b0ffe [file] [log] [blame]
yuezonghe824eb0c2024-06-27 02:32:26 -0700[diff] [blame^]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 <media/v4l2-dev.h>
20#include <media/v4l2-ioctl.h>
21
22static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
23{
24 long ret = -ENOIOCTLCMD;
25
26 if (file->f_op->unlocked_ioctl)
27 ret = file->f_op->unlocked_ioctl(file, cmd, arg);
28
29 return ret;
30}
31
32
33struct v4l2_clip32 {
34 struct v4l2_rect c;
35 compat_caddr_t next;
36};
37
38struct v4l2_window32 {
39 struct v4l2_rect w;
40 enum v4l2_field field;
41 __u32 chromakey;
42 compat_caddr_t clips; /* actually struct v4l2_clip32 * */
43 __u32 clipcount;
44 compat_caddr_t bitmap;
45};
46
47static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
48{
49 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
50 copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
51 get_user(kp->field, &up->field) ||
52 get_user(kp->chromakey, &up->chromakey) ||
53 get_user(kp->clipcount, &up->clipcount))
54 return -EFAULT;
55 if (kp->clipcount > 2048)
56 return -EINVAL;
57 if (kp->clipcount) {
58 struct v4l2_clip32 __user *uclips;
59 struct v4l2_clip __user *kclips;
60 int n = kp->clipcount;
61 compat_caddr_t p;
62
63 if (get_user(p, &up->clips))
64 return -EFAULT;
65 uclips = compat_ptr(p);
66 kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
67 kp->clips = kclips;
68 while (--n >= 0) {
69 if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
70 return -EFAULT;
71 if (put_user(n ? kclips + 1 : NULL, &kclips->next))
72 return -EFAULT;
73 uclips += 1;
74 kclips += 1;
75 }
76 } else
77 kp->clips = NULL;
78 return 0;
79}
80
81static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
82{
83 if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
84 put_user(kp->field, &up->field) ||
85 put_user(kp->chromakey, &up->chromakey) ||
86 put_user(kp->clipcount, &up->clipcount))
87 return -EFAULT;
88 return 0;
89}
90
91static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
92{
93 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
94 return -EFAULT;
95 return 0;
96}
97
98static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
99 struct v4l2_pix_format_mplane __user *up)
100{
101 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
102 return -EFAULT;
103 return 0;
104}
105
106static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
107{
108 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
109 return -EFAULT;
110 return 0;
111}
112
113static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
114 struct v4l2_pix_format_mplane __user *up)
115{
116 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
117 return -EFAULT;
118 return 0;
119}
120
121static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
122{
123 if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
124 return -EFAULT;
125 return 0;
126}
127
128static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
129{
130 if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
131 return -EFAULT;
132 return 0;
133}
134
135static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
136{
137 if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
138 return -EFAULT;
139 return 0;
140}
141
142static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
143{
144 if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
145 return -EFAULT;
146 return 0;
147}
148
149struct v4l2_format32 {
150 enum v4l2_buf_type type;
151 union {
152 struct v4l2_pix_format pix;
153 struct v4l2_pix_format_mplane pix_mp;
154 struct v4l2_window32 win;
155 struct v4l2_vbi_format vbi;
156 struct v4l2_sliced_vbi_format sliced;
157 __u8 raw_data[200]; /* user-defined */
158 } fmt;
159};
160
161/**
162 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
163 * @index: on return, index of the first created buffer
164 * @count: entry: number of requested buffers,
165 * return: number of created buffers
166 * @memory: buffer memory type
167 * @format: frame format, for which buffers are requested
168 * @reserved: future extensions
169 */
170struct v4l2_create_buffers32 {
171 __u32 index;
172 __u32 count;
173 enum v4l2_memory memory;
174 struct v4l2_format32 format;
175 __u32 reserved[8];
176};
177
178static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
179{
180 switch (kp->type) {
181 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
182 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
183 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
184 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
185 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
186 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
187 &up->fmt.pix_mp);
188 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
189 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
190 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
191 case V4L2_BUF_TYPE_VBI_CAPTURE:
192 case V4L2_BUF_TYPE_VBI_OUTPUT:
193 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
194 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
195 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
196 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
197 case V4L2_BUF_TYPE_PRIVATE:
198 if (copy_from_user(kp, up, sizeof(kp->fmt.raw_data)))
199 return -EFAULT;
200 return 0;
201 default:
202 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
203 kp->type);
204 return -EINVAL;
205 }
206}
207
208static 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 get_user(kp->type, &up->type))
212 return -EFAULT;
213 return __get_v4l2_format32(kp, up);
214}
215
216static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
217{
218 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
219 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format.fmt)))
220 return -EFAULT;
221 return __get_v4l2_format32(&kp->format, &up->format);
222}
223
224static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
225{
226 switch (kp->type) {
227 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
228 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
229 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
230 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
232 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
233 &up->fmt.pix_mp);
234 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
235 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
236 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
237 case V4L2_BUF_TYPE_VBI_CAPTURE:
238 case V4L2_BUF_TYPE_VBI_OUTPUT:
239 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
240 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
241 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
242 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
243 case V4L2_BUF_TYPE_PRIVATE:
244 if (copy_to_user(up, kp, sizeof(up->fmt.raw_data)))
245 return -EFAULT;
246 return 0;
247 default:
248 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
249 kp->type);
250 return -EINVAL;
251 }
252}
253
254static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
255{
256 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
257 put_user(kp->type, &up->type))
258 return -EFAULT;
259 return __put_v4l2_format32(kp, up);
260}
261
262static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
263{
264 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
265 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
266 return -EFAULT;
267 return __put_v4l2_format32(&kp->format, &up->format);
268}
269
270struct v4l2_standard32 {
271 __u32 index;
272 __u32 id[2]; /* __u64 would get the alignment wrong */
273 __u8 name[24];
274 struct v4l2_fract frameperiod; /* Frames, not fields */
275 __u32 framelines;
276 __u32 reserved[4];
277};
278
279static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
280{
281 /* other fields are not set by the user, nor used by the driver */
282 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
283 get_user(kp->index, &up->index))
284 return -EFAULT;
285 return 0;
286}
287
288static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
289{
290 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
291 put_user(kp->index, &up->index) ||
292 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
293 copy_to_user(up->name, kp->name, 24) ||
294 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
295 put_user(kp->framelines, &up->framelines) ||
296 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
297 return -EFAULT;
298 return 0;
299}
300
301struct v4l2_plane32 {
302 __u32 bytesused;
303 __u32 length;
304 union {
305 __u32 mem_offset;
306 compat_long_t userptr;
307 } m;
308 __u32 data_offset;
309 __u32 reserved[11];
310};
311
312struct v4l2_buffer32 {
313 __u32 index;
314 enum v4l2_buf_type type;
315 __u32 bytesused;
316 __u32 flags;
317 enum v4l2_field field;
318 struct compat_timeval timestamp;
319 struct v4l2_timecode timecode;
320 __u32 sequence;
321
322 /* memory location */
323 enum v4l2_memory memory;
324 union {
325 __u32 offset;
326 compat_long_t userptr;
327 compat_caddr_t planes;
328 } m;
329 __u32 length;
330 __u32 input;
331 __u32 reserved;
332};
333
334static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
335 enum v4l2_memory memory)
336{
337 void __user *up_pln;
338 compat_long_t p;
339
340 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
341 copy_in_user(&up->data_offset, &up32->data_offset,
342 sizeof(__u32)))
343 return -EFAULT;
344
345 if (memory == V4L2_MEMORY_USERPTR) {
346 if (get_user(p, &up32->m.userptr))
347 return -EFAULT;
348 up_pln = compat_ptr(p);
349 if (put_user((unsigned long)up_pln, &up->m.userptr))
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
360static 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
375 return 0;
376}
377
378static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
379{
380 struct v4l2_plane32 __user *uplane32;
381 struct v4l2_plane __user *uplane;
382 compat_caddr_t p;
383 int num_planes;
384 int ret;
385
386 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
387 get_user(kp->index, &up->index) ||
388 get_user(kp->type, &up->type) ||
389 get_user(kp->flags, &up->flags) ||
390 get_user(kp->memory, &up->memory) ||
391 get_user(kp->input, &up->input))
392 return -EFAULT;
393
394 if (V4L2_TYPE_IS_OUTPUT(kp->type))
395 if (get_user(kp->bytesused, &up->bytesused) ||
396 get_user(kp->field, &up->field) ||
397 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
398 get_user(kp->timestamp.tv_usec,
399 &up->timestamp.tv_usec))
400 return -EFAULT;
401
402 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
403 if (get_user(kp->length, &up->length))
404 return -EFAULT;
405
406 num_planes = kp->length;
407 if (num_planes == 0) {
408 kp->m.planes = NULL;
409 /* num_planes == 0 is legal, e.g. when userspace doesn't
410 * need planes array on DQBUF*/
411 return 0;
412 }
413
414 if (get_user(p, &up->m.planes))
415 return -EFAULT;
416
417 uplane32 = compat_ptr(p);
418 if (!access_ok(VERIFY_READ, uplane32,
419 num_planes * sizeof(struct v4l2_plane32)))
420 return -EFAULT;
421
422 /* We don't really care if userspace decides to kill itself
423 * by passing a very big num_planes value */
424 uplane = compat_alloc_user_space(num_planes *
425 sizeof(struct v4l2_plane));
426 kp->m.planes = uplane;
427
428 while (--num_planes >= 0) {
429 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
430 if (ret)
431 return ret;
432 ++uplane;
433 ++uplane32;
434 }
435 } else {
436 switch (kp->memory) {
437 case V4L2_MEMORY_MMAP:
438 if (get_user(kp->length, &up->length) ||
439 get_user(kp->m.offset, &up->m.offset))
440 return -EFAULT;
441 break;
442 case V4L2_MEMORY_USERPTR:
443 {
444 compat_long_t tmp;
445
446 if (get_user(kp->length, &up->length) ||
447 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 }
458 }
459
460 return 0;
461}
462
463static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
464{
465 struct v4l2_plane32 __user *uplane32;
466 struct v4l2_plane __user *uplane;
467 compat_caddr_t p;
468 int num_planes;
469 int ret;
470
471 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
472 put_user(kp->index, &up->index) ||
473 put_user(kp->type, &up->type) ||
474 put_user(kp->flags, &up->flags) ||
475 put_user(kp->memory, &up->memory) ||
476 put_user(kp->input, &up->input))
477 return -EFAULT;
478
479 if (put_user(kp->bytesused, &up->bytesused) ||
480 put_user(kp->field, &up->field) ||
481 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
482 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
483 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
484 put_user(kp->sequence, &up->sequence) ||
485 put_user(kp->reserved, &up->reserved))
486 return -EFAULT;
487
488 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
489 num_planes = kp->length;
490 if (num_planes == 0)
491 return 0;
492
493 uplane = kp->m.planes;
494 if (get_user(p, &up->m.planes))
495 return -EFAULT;
496 uplane32 = compat_ptr(p);
497
498 while (--num_planes >= 0) {
499 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
500 if (ret)
501 return ret;
502 ++uplane;
503 ++uplane32;
504 }
505 } else {
506 switch (kp->memory) {
507 case V4L2_MEMORY_MMAP:
508 if (put_user(kp->length, &up->length) ||
509 put_user(kp->m.offset, &up->m.offset))
510 return -EFAULT;
511 break;
512 case V4L2_MEMORY_USERPTR:
513 if (put_user(kp->length, &up->length) ||
514 put_user(kp->m.userptr, &up->m.userptr))
515 return -EFAULT;
516 break;
517 case V4L2_MEMORY_OVERLAY:
518 if (put_user(kp->m.offset, &up->m.offset))
519 return -EFAULT;
520 break;
521 }
522 }
523
524 return 0;
525}
526
527struct v4l2_framebuffer32 {
528 __u32 capability;
529 __u32 flags;
530 compat_caddr_t base;
531 struct v4l2_pix_format fmt;
532};
533
534static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
535{
536 u32 tmp;
537
538 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
539 get_user(tmp, &up->base) ||
540 get_user(kp->capability, &up->capability) ||
541 get_user(kp->flags, &up->flags))
542 return -EFAULT;
543 kp->base = compat_ptr(tmp);
544 get_v4l2_pix_format(&kp->fmt, &up->fmt);
545 return 0;
546}
547
548static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
549{
550 u32 tmp = (u32)((unsigned long)kp->base);
551
552 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
553 put_user(tmp, &up->base) ||
554 put_user(kp->capability, &up->capability) ||
555 put_user(kp->flags, &up->flags))
556 return -EFAULT;
557 put_v4l2_pix_format(&kp->fmt, &up->fmt);
558 return 0;
559}
560
561struct v4l2_input32 {
562 __u32 index; /* Which input */
563 __u8 name[32]; /* Label */
564 __u32 type; /* Type of input */
565 __u32 audioset; /* Associated audios (bitfield) */
566 __u32 tuner; /* Associated tuner */
567 v4l2_std_id std;
568 __u32 status;
569 __u32 reserved[4];
570} __attribute__ ((packed));
571
572/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
573 Otherwise it is identical to the 32-bit version. */
574static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
575{
576 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
577 return -EFAULT;
578 return 0;
579}
580
581static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
582{
583 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
584 return -EFAULT;
585 return 0;
586}
587
588struct v4l2_ext_controls32 {
589 __u32 ctrl_class;
590 __u32 count;
591 __u32 error_idx;
592 __u32 reserved[2];
593 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
594};
595
596struct v4l2_ext_control32 {
597 __u32 id;
598 __u32 size;
599 __u32 reserved2[1];
600 union {
601 __s32 value;
602 __s64 value64;
603 compat_caddr_t string; /* actually char * */
604 };
605} __attribute__ ((packed));
606
607/* The following function really belong in v4l2-common, but that causes
608 a circular dependency between modules. We need to think about this, but
609 for now this will do. */
610
611/* Return non-zero if this control is a pointer type. Currently only
612 type STRING is a pointer type. */
613static inline int ctrl_is_pointer(u32 id)
614{
615 switch (id) {
616 case V4L2_CID_RDS_TX_PS_NAME:
617 case V4L2_CID_RDS_TX_RADIO_TEXT:
618 return 1;
619 default:
620 return 0;
621 }
622}
623
624static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
625{
626 struct v4l2_ext_control32 __user *ucontrols;
627 struct v4l2_ext_control __user *kcontrols;
628 int n;
629 compat_caddr_t p;
630
631 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
632 get_user(kp->ctrl_class, &up->ctrl_class) ||
633 get_user(kp->count, &up->count) ||
634 get_user(kp->error_idx, &up->error_idx) ||
635 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
636 return -EFAULT;
637 n = kp->count;
638 if (n == 0) {
639 kp->controls = NULL;
640 return 0;
641 }
642 if (get_user(p, &up->controls))
643 return -EFAULT;
644 ucontrols = compat_ptr(p);
645 if (!access_ok(VERIFY_READ, ucontrols,
646 n * sizeof(struct v4l2_ext_control32)))
647 return -EFAULT;
648 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
649 kp->controls = kcontrols;
650 while (--n >= 0) {
651 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
652 return -EFAULT;
653 if (ctrl_is_pointer(kcontrols->id)) {
654 void __user *s;
655
656 if (get_user(p, &ucontrols->string))
657 return -EFAULT;
658 s = compat_ptr(p);
659 if (put_user(s, &kcontrols->string))
660 return -EFAULT;
661 }
662 ucontrols++;
663 kcontrols++;
664 }
665 return 0;
666}
667
668static int put_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 = kp->controls;
672 int n = kp->count;
673 compat_caddr_t p;
674
675 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
676 put_user(kp->ctrl_class, &up->ctrl_class) ||
677 put_user(kp->count, &up->count) ||
678 put_user(kp->error_idx, &up->error_idx) ||
679 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
680 return -EFAULT;
681 if (!kp->count)
682 return 0;
683
684 if (get_user(p, &up->controls))
685 return -EFAULT;
686 ucontrols = compat_ptr(p);
687 if (!access_ok(VERIFY_WRITE, ucontrols,
688 n * sizeof(struct v4l2_ext_control32)))
689 return -EFAULT;
690
691 while (--n >= 0) {
692 unsigned size = sizeof(*ucontrols);
693
694 /* Do not modify the pointer when copying a pointer control.
695 The contents of the pointer was changed, not the pointer
696 itself. */
697 if (ctrl_is_pointer(kcontrols->id))
698 size -= sizeof(ucontrols->value64);
699 if (copy_in_user(ucontrols, kcontrols, size))
700 return -EFAULT;
701 ucontrols++;
702 kcontrols++;
703 }
704 return 0;
705}
706
707struct v4l2_event32 {
708 __u32 type;
709 union {
710 __u8 data[64];
711 } u;
712 __u32 pending;
713 __u32 sequence;
714 struct compat_timespec timestamp;
715 __u32 id;
716 __u32 reserved[8];
717};
718
719static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
720{
721 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
722 put_user(kp->type, &up->type) ||
723 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
724 put_user(kp->pending, &up->pending) ||
725 put_user(kp->sequence, &up->sequence) ||
726 put_compat_timespec(&kp->timestamp, &up->timestamp) ||
727 put_user(kp->id, &up->id) ||
728 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
729 return -EFAULT;
730 return 0;
731}
732
733#define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
734#define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
735#define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
736#define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
737#define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
738#define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
739#define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
740#define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
741#define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
742#define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
743#define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
744#define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
745#define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
746#define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
747#define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
748#define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
749
750#define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
751#define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
752#define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
753#define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
754#define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
755#define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
756#define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
757
758static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
759{
760 union {
761 struct v4l2_format v2f;
762 struct v4l2_buffer v2b;
763 struct v4l2_framebuffer v2fb;
764 struct v4l2_input v2i;
765 struct v4l2_standard v2s;
766 struct v4l2_ext_controls v2ecs;
767 struct v4l2_event v2ev;
768 struct v4l2_create_buffers v2crt;
769 unsigned long vx;
770 int vi;
771 } karg;
772 void __user *up = compat_ptr(arg);
773 int compatible_arg = 1;
774 long err = 0;
775
776 /* First, convert the command. */
777 switch (cmd) {
778 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
779 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
780 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
781 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
782 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
783 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
784 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
785 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
786 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
787 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
788 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
789 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
790 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
791 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
792 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
793 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
794 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
795 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
796 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
797 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
798 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
799 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
800 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
801 }
802
803 switch (cmd) {
804 case VIDIOC_OVERLAY:
805 case VIDIOC_STREAMON:
806 case VIDIOC_STREAMOFF:
807 case VIDIOC_S_INPUT:
808 case VIDIOC_S_OUTPUT:
809 err = get_user(karg.vi, (s32 __user *)up);
810 compatible_arg = 0;
811 break;
812
813 case VIDIOC_G_INPUT:
814 case VIDIOC_G_OUTPUT:
815 compatible_arg = 0;
816 break;
817
818 case VIDIOC_G_FMT:
819 case VIDIOC_S_FMT:
820 case VIDIOC_TRY_FMT:
821 err = get_v4l2_format32(&karg.v2f, up);
822 compatible_arg = 0;
823 break;
824
825 case VIDIOC_CREATE_BUFS:
826 err = get_v4l2_create32(&karg.v2crt, up);
827 compatible_arg = 0;
828 break;
829
830 case VIDIOC_PREPARE_BUF:
831 case VIDIOC_QUERYBUF:
832 case VIDIOC_QBUF:
833 case VIDIOC_DQBUF:
834 err = get_v4l2_buffer32(&karg.v2b, up);
835 compatible_arg = 0;
836 break;
837
838 case VIDIOC_S_FBUF:
839 err = get_v4l2_framebuffer32(&karg.v2fb, up);
840 compatible_arg = 0;
841 break;
842
843 case VIDIOC_G_FBUF:
844 compatible_arg = 0;
845 break;
846
847 case VIDIOC_ENUMSTD:
848 err = get_v4l2_standard32(&karg.v2s, up);
849 compatible_arg = 0;
850 break;
851
852 case VIDIOC_ENUMINPUT:
853 err = get_v4l2_input32(&karg.v2i, up);
854 compatible_arg = 0;
855 break;
856
857 case VIDIOC_G_EXT_CTRLS:
858 case VIDIOC_S_EXT_CTRLS:
859 case VIDIOC_TRY_EXT_CTRLS:
860 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
861 compatible_arg = 0;
862 break;
863 case VIDIOC_DQEVENT:
864 compatible_arg = 0;
865 break;
866 }
867 if (err)
868 return err;
869
870 if (compatible_arg)
871 err = native_ioctl(file, cmd, (unsigned long)up);
872 else {
873 mm_segment_t old_fs = get_fs();
874
875 set_fs(KERNEL_DS);
876 err = native_ioctl(file, cmd, (unsigned long)&karg);
877 set_fs(old_fs);
878 }
879
880 /* Special case: even after an error we need to put the
881 results back for these ioctls since the error_idx will
882 contain information on which control failed. */
883 switch (cmd) {
884 case VIDIOC_G_EXT_CTRLS:
885 case VIDIOC_S_EXT_CTRLS:
886 case VIDIOC_TRY_EXT_CTRLS:
887 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
888 err = -EFAULT;
889 break;
890 }
891 if (err)
892 return err;
893
894 switch (cmd) {
895 case VIDIOC_S_INPUT:
896 case VIDIOC_S_OUTPUT:
897 case VIDIOC_G_INPUT:
898 case VIDIOC_G_OUTPUT:
899 err = put_user(((s32)karg.vi), (s32 __user *)up);
900 break;
901
902 case VIDIOC_G_FBUF:
903 err = put_v4l2_framebuffer32(&karg.v2fb, up);
904 break;
905
906 case VIDIOC_DQEVENT:
907 err = put_v4l2_event32(&karg.v2ev, up);
908 break;
909
910 case VIDIOC_G_FMT:
911 case VIDIOC_S_FMT:
912 case VIDIOC_TRY_FMT:
913 err = put_v4l2_format32(&karg.v2f, up);
914 break;
915
916 case VIDIOC_CREATE_BUFS:
917 err = put_v4l2_create32(&karg.v2crt, up);
918 break;
919
920 case VIDIOC_QUERYBUF:
921 case VIDIOC_QBUF:
922 case VIDIOC_DQBUF:
923 err = put_v4l2_buffer32(&karg.v2b, up);
924 break;
925
926 case VIDIOC_ENUMSTD:
927 err = put_v4l2_standard32(&karg.v2s, up);
928 break;
929
930 case VIDIOC_ENUMINPUT:
931 err = put_v4l2_input32(&karg.v2i, up);
932 break;
933 }
934 return err;
935}
936
937long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
938{
939 struct video_device *vdev = video_devdata(file);
940 long ret = -ENOIOCTLCMD;
941
942 if (!file->f_op->unlocked_ioctl)
943 return ret;
944
945 switch (cmd) {
946 case VIDIOC_QUERYCAP:
947 case VIDIOC_RESERVED:
948 case VIDIOC_ENUM_FMT:
949 case VIDIOC_G_FMT32:
950 case VIDIOC_S_FMT32:
951 case VIDIOC_REQBUFS:
952 case VIDIOC_QUERYBUF32:
953 case VIDIOC_G_FBUF32:
954 case VIDIOC_S_FBUF32:
955 case VIDIOC_OVERLAY32:
956 case VIDIOC_QBUF32:
957 case VIDIOC_DQBUF32:
958 case VIDIOC_STREAMON32:
959 case VIDIOC_STREAMOFF32:
960 case VIDIOC_G_PARM:
961 case VIDIOC_S_PARM:
962 case VIDIOC_G_STD:
963 case VIDIOC_S_STD:
964 case VIDIOC_ENUMSTD32:
965 case VIDIOC_ENUMINPUT32:
966 case VIDIOC_G_CTRL:
967 case VIDIOC_S_CTRL:
968 case VIDIOC_G_TUNER:
969 case VIDIOC_S_TUNER:
970 case VIDIOC_G_AUDIO:
971 case VIDIOC_S_AUDIO:
972 case VIDIOC_QUERYCTRL:
973 case VIDIOC_QUERYMENU:
974 case VIDIOC_G_INPUT32:
975 case VIDIOC_S_INPUT32:
976 case VIDIOC_G_OUTPUT32:
977 case VIDIOC_S_OUTPUT32:
978 case VIDIOC_ENUMOUTPUT:
979 case VIDIOC_G_AUDOUT:
980 case VIDIOC_S_AUDOUT:
981 case VIDIOC_G_MODULATOR:
982 case VIDIOC_S_MODULATOR:
983 case VIDIOC_S_FREQUENCY:
984 case VIDIOC_G_FREQUENCY:
985 case VIDIOC_CROPCAP:
986 case VIDIOC_G_CROP:
987 case VIDIOC_S_CROP:
988 case VIDIOC_G_SELECTION:
989 case VIDIOC_S_SELECTION:
990 case VIDIOC_G_JPEGCOMP:
991 case VIDIOC_S_JPEGCOMP:
992 case VIDIOC_QUERYSTD:
993 case VIDIOC_TRY_FMT32:
994 case VIDIOC_ENUMAUDIO:
995 case VIDIOC_ENUMAUDOUT:
996 case VIDIOC_G_PRIORITY:
997 case VIDIOC_S_PRIORITY:
998 case VIDIOC_G_SLICED_VBI_CAP:
999 case VIDIOC_LOG_STATUS:
1000 case VIDIOC_G_EXT_CTRLS32:
1001 case VIDIOC_S_EXT_CTRLS32:
1002 case VIDIOC_TRY_EXT_CTRLS32:
1003 case VIDIOC_ENUM_FRAMESIZES:
1004 case VIDIOC_ENUM_FRAMEINTERVALS:
1005 case VIDIOC_G_ENC_INDEX:
1006 case VIDIOC_ENCODER_CMD:
1007 case VIDIOC_TRY_ENCODER_CMD:
1008 case VIDIOC_DECODER_CMD:
1009 case VIDIOC_TRY_DECODER_CMD:
1010 case VIDIOC_DBG_S_REGISTER:
1011 case VIDIOC_DBG_G_REGISTER:
1012 case VIDIOC_DBG_G_CHIP_IDENT:
1013 case VIDIOC_S_HW_FREQ_SEEK:
1014 case VIDIOC_ENUM_DV_PRESETS:
1015 case VIDIOC_S_DV_PRESET:
1016 case VIDIOC_G_DV_PRESET:
1017 case VIDIOC_QUERY_DV_PRESET:
1018 case VIDIOC_S_DV_TIMINGS:
1019 case VIDIOC_G_DV_TIMINGS:
1020 case VIDIOC_DQEVENT:
1021 case VIDIOC_DQEVENT32:
1022 case VIDIOC_SUBSCRIBE_EVENT:
1023 case VIDIOC_UNSUBSCRIBE_EVENT:
1024 case VIDIOC_CREATE_BUFS32:
1025 case VIDIOC_PREPARE_BUF32:
1026 ret = do_video_ioctl(file, cmd, arg);
1027 break;
1028
1029 default:
1030 if (vdev->fops->compat_ioctl32)
1031 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1032
1033 if (ret == -ENOIOCTLCMD)
1034 printk(KERN_WARNING "compat_ioctl32: "
1035 "unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1036 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd),
1037 cmd);
1038 break;
1039 }
1040 return ret;
1041}
1042EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);