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
native_ioctl(struct file * file,unsigned int cmd,unsigned long arg)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
get_v4l2_window32(struct v4l2_window * kp,struct v4l2_window32 __user * up)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
put_v4l2_window32(struct v4l2_window * kp,struct v4l2_window32 __user * up)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
get_v4l2_pix_format(struct v4l2_pix_format * kp,struct v4l2_pix_format __user * up)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
get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane * kp,struct v4l2_pix_format_mplane __user * up)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
put_v4l2_pix_format(struct v4l2_pix_format * kp,struct v4l2_pix_format __user * up)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
put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane * kp,struct v4l2_pix_format_mplane __user * up)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
get_v4l2_vbi_format(struct v4l2_vbi_format * kp,struct v4l2_vbi_format __user * up)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
put_v4l2_vbi_format(struct v4l2_vbi_format * kp,struct v4l2_vbi_format __user * up)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
get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format * kp,struct v4l2_sliced_vbi_format __user * up)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
put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format * kp,struct v4l2_sliced_vbi_format __user * up)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
__get_v4l2_format32(struct v4l2_format * kp,struct v4l2_format32 __user * up)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
get_v4l2_format32(struct v4l2_format * kp,struct v4l2_format32 __user * up)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
get_v4l2_create32(struct v4l2_create_buffers * kp,struct v4l2_create_buffers32 __user * up)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
__put_v4l2_format32(struct v4l2_format * kp,struct v4l2_format32 __user * up)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
put_v4l2_format32(struct v4l2_format * kp,struct v4l2_format32 __user * up)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
put_v4l2_create32(struct v4l2_create_buffers * kp,struct v4l2_create_buffers32 __user * up)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 copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
264 return -EFAULT;
265 return __put_v4l2_format32(&kp->format, &up->format);
266 }
267
268 struct v4l2_standard32 {
269 __u32 index;
270 __u32 id[2]; /* __u64 would get the alignment wrong */
271 __u8 name[24];
272 struct v4l2_fract frameperiod; /* Frames, not fields */
273 __u32 framelines;
274 __u32 reserved[4];
275 };
276
get_v4l2_standard32(struct v4l2_standard * kp,struct v4l2_standard32 __user * up)277 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
278 {
279 /* other fields are not set by the user, nor used by the driver */
280 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
281 get_user(kp->index, &up->index))
282 return -EFAULT;
283 return 0;
284 }
285
put_v4l2_standard32(struct v4l2_standard * kp,struct v4l2_standard32 __user * up)286 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
287 {
288 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
289 put_user(kp->index, &up->index) ||
290 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
291 copy_to_user(up->name, kp->name, 24) ||
292 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
293 put_user(kp->framelines, &up->framelines) ||
294 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
295 return -EFAULT;
296 return 0;
297 }
298
299 struct v4l2_plane32 {
300 __u32 bytesused;
301 __u32 length;
302 union {
303 __u32 mem_offset;
304 compat_long_t userptr;
305 __s32 fd;
306 } m;
307 __u32 data_offset;
308 __u32 reserved[11];
309 };
310
311 struct v4l2_buffer32 {
312 __u32 index;
313 __u32 type; /* enum v4l2_buf_type */
314 __u32 bytesused;
315 __u32 flags;
316 __u32 field; /* enum v4l2_field */
317 struct compat_timeval timestamp;
318 struct v4l2_timecode timecode;
319 __u32 sequence;
320
321 /* memory location */
322 __u32 memory; /* enum v4l2_memory */
323 union {
324 __u32 offset;
325 compat_long_t userptr;
326 compat_caddr_t planes;
327 __s32 fd;
328 } m;
329 __u32 length;
330 __u32 reserved2;
331 __u32 reserved;
332 };
333
get_v4l2_plane32(struct v4l2_plane __user * up,struct v4l2_plane32 __user * up32,enum v4l2_memory memory)334 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *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 if (memory == V4L2_MEMORY_DMABUF) {
352 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
353 return -EFAULT;
354 } else {
355 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
356 sizeof(__u32)))
357 return -EFAULT;
358 }
359
360 return 0;
361 }
362
put_v4l2_plane32(struct v4l2_plane __user * up,struct v4l2_plane32 __user * up32,enum v4l2_memory memory)363 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
364 enum v4l2_memory memory)
365 {
366 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
367 copy_in_user(&up32->data_offset, &up->data_offset,
368 sizeof(__u32)))
369 return -EFAULT;
370
371 /* For MMAP, driver might've set up the offset, so copy it back.
372 * USERPTR stays the same (was userspace-provided), so no copying. */
373 if (memory == V4L2_MEMORY_MMAP)
374 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
375 sizeof(__u32)))
376 return -EFAULT;
377 /* For DMABUF, driver might've set up the fd, so copy it back. */
378 if (memory == V4L2_MEMORY_DMABUF)
379 if (copy_in_user(&up32->m.fd, &up->m.fd,
380 sizeof(int)))
381 return -EFAULT;
382
383 return 0;
384 }
385
get_v4l2_buffer32(struct v4l2_buffer * kp,struct v4l2_buffer32 __user * up)386 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
387 {
388 struct v4l2_plane32 __user *uplane32;
389 struct v4l2_plane __user *uplane;
390 compat_caddr_t p;
391 int num_planes;
392 int ret;
393
394 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
395 get_user(kp->index, &up->index) ||
396 get_user(kp->type, &up->type) ||
397 get_user(kp->flags, &up->flags) ||
398 get_user(kp->memory, &up->memory) ||
399 get_user(kp->length, &up->length))
400 return -EFAULT;
401
402 if (V4L2_TYPE_IS_OUTPUT(kp->type))
403 if (get_user(kp->bytesused, &up->bytesused) ||
404 get_user(kp->field, &up->field) ||
405 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
406 get_user(kp->timestamp.tv_usec,
407 &up->timestamp.tv_usec))
408 return -EFAULT;
409
410 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
411 num_planes = kp->length;
412 if (num_planes == 0) {
413 kp->m.planes = NULL;
414 /* num_planes == 0 is legal, e.g. when userspace doesn't
415 * need planes array on DQBUF*/
416 return 0;
417 }
418
419 if (get_user(p, &up->m.planes))
420 return -EFAULT;
421
422 uplane32 = compat_ptr(p);
423 if (!access_ok(VERIFY_READ, uplane32,
424 num_planes * sizeof(struct v4l2_plane32)))
425 return -EFAULT;
426
427 /* We don't really care if userspace decides to kill itself
428 * by passing a very big num_planes value */
429 uplane = compat_alloc_user_space(num_planes *
430 sizeof(struct v4l2_plane));
431 kp->m.planes = (__force struct v4l2_plane *)uplane;
432
433 while (--num_planes >= 0) {
434 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
435 if (ret)
436 return ret;
437 ++uplane;
438 ++uplane32;
439 }
440 } else {
441 switch (kp->memory) {
442 case V4L2_MEMORY_MMAP:
443 if (get_user(kp->m.offset, &up->m.offset))
444 return -EFAULT;
445 break;
446 case V4L2_MEMORY_USERPTR:
447 {
448 compat_long_t tmp;
449
450 if (get_user(tmp, &up->m.userptr))
451 return -EFAULT;
452
453 kp->m.userptr = (unsigned long)compat_ptr(tmp);
454 }
455 break;
456 case V4L2_MEMORY_OVERLAY:
457 if (get_user(kp->m.offset, &up->m.offset))
458 return -EFAULT;
459 break;
460 case V4L2_MEMORY_DMABUF:
461 if (get_user(kp->m.fd, &up->m.fd))
462 return -EFAULT;
463 break;
464 }
465 }
466
467 return 0;
468 }
469
put_v4l2_buffer32(struct v4l2_buffer * kp,struct v4l2_buffer32 __user * up)470 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
471 {
472 struct v4l2_plane32 __user *uplane32;
473 struct v4l2_plane __user *uplane;
474 compat_caddr_t p;
475 int num_planes;
476 int ret;
477
478 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
479 put_user(kp->index, &up->index) ||
480 put_user(kp->type, &up->type) ||
481 put_user(kp->flags, &up->flags) ||
482 put_user(kp->memory, &up->memory))
483 return -EFAULT;
484
485 if (put_user(kp->bytesused, &up->bytesused) ||
486 put_user(kp->field, &up->field) ||
487 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
488 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
489 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
490 put_user(kp->sequence, &up->sequence) ||
491 put_user(kp->reserved2, &up->reserved2) ||
492 put_user(kp->reserved, &up->reserved) ||
493 put_user(kp->length, &up->length))
494 return -EFAULT;
495
496 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
497 num_planes = kp->length;
498 if (num_planes == 0)
499 return 0;
500
501 uplane = (__force struct v4l2_plane __user *)kp->m.planes;
502 if (get_user(p, &up->m.planes))
503 return -EFAULT;
504 uplane32 = compat_ptr(p);
505
506 while (--num_planes >= 0) {
507 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
508 if (ret)
509 return ret;
510 ++uplane;
511 ++uplane32;
512 }
513 } else {
514 switch (kp->memory) {
515 case V4L2_MEMORY_MMAP:
516 if (put_user(kp->m.offset, &up->m.offset))
517 return -EFAULT;
518 break;
519 case V4L2_MEMORY_USERPTR:
520 if (put_user(kp->m.userptr, &up->m.userptr))
521 return -EFAULT;
522 break;
523 case V4L2_MEMORY_OVERLAY:
524 if (put_user(kp->m.offset, &up->m.offset))
525 return -EFAULT;
526 break;
527 case V4L2_MEMORY_DMABUF:
528 if (put_user(kp->m.fd, &up->m.fd))
529 return -EFAULT;
530 break;
531 }
532 }
533
534 return 0;
535 }
536
537 struct v4l2_framebuffer32 {
538 __u32 capability;
539 __u32 flags;
540 compat_caddr_t base;
541 struct {
542 __u32 width;
543 __u32 height;
544 __u32 pixelformat;
545 __u32 field;
546 __u32 bytesperline;
547 __u32 sizeimage;
548 __u32 colorspace;
549 __u32 priv;
550 } fmt;
551 };
552
get_v4l2_framebuffer32(struct v4l2_framebuffer * kp,struct v4l2_framebuffer32 __user * up)553 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
554 {
555 u32 tmp;
556
557 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
558 get_user(tmp, &up->base) ||
559 get_user(kp->capability, &up->capability) ||
560 get_user(kp->flags, &up->flags) ||
561 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
562 return -EFAULT;
563 kp->base = (__force void *)compat_ptr(tmp);
564 return 0;
565 }
566
put_v4l2_framebuffer32(struct v4l2_framebuffer * kp,struct v4l2_framebuffer32 __user * up)567 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
568 {
569 u32 tmp = (u32)((unsigned long)kp->base);
570
571 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
572 put_user(tmp, &up->base) ||
573 put_user(kp->capability, &up->capability) ||
574 put_user(kp->flags, &up->flags) ||
575 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
576 return -EFAULT;
577 return 0;
578 }
579
580 struct v4l2_input32 {
581 __u32 index; /* Which input */
582 __u8 name[32]; /* Label */
583 __u32 type; /* Type of input */
584 __u32 audioset; /* Associated audios (bitfield) */
585 __u32 tuner; /* Associated tuner */
586 v4l2_std_id std;
587 __u32 status;
588 __u32 reserved[4];
589 } __attribute__ ((packed));
590
591 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
592 Otherwise it is identical to the 32-bit version. */
get_v4l2_input32(struct v4l2_input * kp,struct v4l2_input32 __user * up)593 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
594 {
595 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
596 return -EFAULT;
597 return 0;
598 }
599
put_v4l2_input32(struct v4l2_input * kp,struct v4l2_input32 __user * up)600 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
601 {
602 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
603 return -EFAULT;
604 return 0;
605 }
606
607 struct v4l2_ext_controls32 {
608 __u32 ctrl_class;
609 __u32 count;
610 __u32 error_idx;
611 __u32 reserved[2];
612 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
613 };
614
615 struct v4l2_ext_control32 {
616 __u32 id;
617 __u32 size;
618 __u32 reserved2[1];
619 union {
620 __s32 value;
621 __s64 value64;
622 compat_caddr_t string; /* actually char * */
623 };
624 } __attribute__ ((packed));
625
626 /* The following function really belong in v4l2-common, but that causes
627 a circular dependency between modules. We need to think about this, but
628 for now this will do. */
629
630 /* Return non-zero if this control is a pointer type. Currently only
631 type STRING is a pointer type. */
ctrl_is_pointer(u32 id)632 static inline int ctrl_is_pointer(u32 id)
633 {
634 switch (id) {
635 case V4L2_CID_RDS_TX_PS_NAME:
636 case V4L2_CID_RDS_TX_RADIO_TEXT:
637 return 1;
638 default:
639 return 0;
640 }
641 }
642
get_v4l2_ext_controls32(struct v4l2_ext_controls * kp,struct v4l2_ext_controls32 __user * up)643 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
644 {
645 struct v4l2_ext_control32 __user *ucontrols;
646 struct v4l2_ext_control __user *kcontrols;
647 int n;
648 compat_caddr_t p;
649
650 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
651 get_user(kp->ctrl_class, &up->ctrl_class) ||
652 get_user(kp->count, &up->count) ||
653 get_user(kp->error_idx, &up->error_idx) ||
654 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
655 return -EFAULT;
656 n = kp->count;
657 if (n == 0) {
658 kp->controls = NULL;
659 return 0;
660 }
661 if (get_user(p, &up->controls))
662 return -EFAULT;
663 ucontrols = compat_ptr(p);
664 if (!access_ok(VERIFY_READ, ucontrols,
665 n * sizeof(struct v4l2_ext_control32)))
666 return -EFAULT;
667 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
668 kp->controls = (__force struct v4l2_ext_control *)kcontrols;
669 while (--n >= 0) {
670 u32 id;
671
672 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
673 return -EFAULT;
674 if (get_user(id, &kcontrols->id))
675 return -EFAULT;
676 if (ctrl_is_pointer(id)) {
677 void __user *s;
678
679 if (get_user(p, &ucontrols->string))
680 return -EFAULT;
681 s = compat_ptr(p);
682 if (put_user(s, &kcontrols->string))
683 return -EFAULT;
684 }
685 ucontrols++;
686 kcontrols++;
687 }
688 return 0;
689 }
690
put_v4l2_ext_controls32(struct v4l2_ext_controls * kp,struct v4l2_ext_controls32 __user * up)691 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
692 {
693 struct v4l2_ext_control32 __user *ucontrols;
694 struct v4l2_ext_control __user *kcontrols =
695 (__force struct v4l2_ext_control __user *)kp->controls;
696 int n = kp->count;
697 compat_caddr_t p;
698
699 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
700 put_user(kp->ctrl_class, &up->ctrl_class) ||
701 put_user(kp->count, &up->count) ||
702 put_user(kp->error_idx, &up->error_idx) ||
703 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
704 return -EFAULT;
705 if (!kp->count)
706 return 0;
707
708 if (get_user(p, &up->controls))
709 return -EFAULT;
710 ucontrols = compat_ptr(p);
711 if (!access_ok(VERIFY_WRITE, ucontrols,
712 n * sizeof(struct v4l2_ext_control32)))
713 return -EFAULT;
714
715 while (--n >= 0) {
716 unsigned size = sizeof(*ucontrols);
717 u32 id;
718
719 if (get_user(id, &kcontrols->id))
720 return -EFAULT;
721 /* Do not modify the pointer when copying a pointer control.
722 The contents of the pointer was changed, not the pointer
723 itself. */
724 if (ctrl_is_pointer(id))
725 size -= sizeof(ucontrols->value64);
726 if (copy_in_user(ucontrols, kcontrols, size))
727 return -EFAULT;
728 ucontrols++;
729 kcontrols++;
730 }
731 return 0;
732 }
733
734 struct v4l2_event32 {
735 __u32 type;
736 union {
737 __u8 data[64];
738 } u;
739 __u32 pending;
740 __u32 sequence;
741 struct compat_timespec timestamp;
742 __u32 id;
743 __u32 reserved[8];
744 };
745
put_v4l2_event32(struct v4l2_event * kp,struct v4l2_event32 __user * up)746 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
747 {
748 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
749 put_user(kp->type, &up->type) ||
750 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
751 put_user(kp->pending, &up->pending) ||
752 put_user(kp->sequence, &up->sequence) ||
753 compat_put_timespec(&kp->timestamp, &up->timestamp) ||
754 put_user(kp->id, &up->id) ||
755 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
756 return -EFAULT;
757 return 0;
758 }
759
760 struct v4l2_edid32 {
761 __u32 pad;
762 __u32 start_block;
763 __u32 blocks;
764 __u32 reserved[5];
765 compat_caddr_t edid;
766 };
767
get_v4l2_edid32(struct v4l2_edid * kp,struct v4l2_edid32 __user * up)768 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
769 {
770 u32 tmp;
771
772 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
773 get_user(kp->pad, &up->pad) ||
774 get_user(kp->start_block, &up->start_block) ||
775 get_user(kp->blocks, &up->blocks) ||
776 get_user(tmp, &up->edid) ||
777 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
778 return -EFAULT;
779 kp->edid = (__force u8 *)compat_ptr(tmp);
780 return 0;
781 }
782
put_v4l2_edid32(struct v4l2_edid * kp,struct v4l2_edid32 __user * up)783 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
784 {
785 u32 tmp = (u32)((unsigned long)kp->edid);
786
787 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
788 put_user(kp->pad, &up->pad) ||
789 put_user(kp->start_block, &up->start_block) ||
790 put_user(kp->blocks, &up->blocks) ||
791 put_user(tmp, &up->edid) ||
792 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
793 return -EFAULT;
794 return 0;
795 }
796
797
798 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
799 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
800 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
801 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
802 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
803 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
804 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
805 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
806 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
807 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
808 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
809 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
810 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
811 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
812 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
813 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
814 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
815 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
816
817 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
818 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
819 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
820 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
821 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
822 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
823 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
824
do_video_ioctl(struct file * file,unsigned int cmd,unsigned long arg)825 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
826 {
827 union {
828 struct v4l2_format v2f;
829 struct v4l2_buffer v2b;
830 struct v4l2_framebuffer v2fb;
831 struct v4l2_input v2i;
832 struct v4l2_standard v2s;
833 struct v4l2_ext_controls v2ecs;
834 struct v4l2_event v2ev;
835 struct v4l2_create_buffers v2crt;
836 struct v4l2_edid v2edid;
837 unsigned long vx;
838 int vi;
839 } karg;
840 void __user *up = compat_ptr(arg);
841 int compatible_arg = 1;
842 long err = 0;
843
844 /* First, convert the command. */
845 switch (cmd) {
846 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
847 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
848 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
849 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
850 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
851 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
852 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
853 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
854 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
855 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
856 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
857 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
858 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
859 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
860 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
861 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
862 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
863 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
864 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
865 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
866 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
867 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
868 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
869 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
870 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
871 }
872
873 switch (cmd) {
874 case VIDIOC_OVERLAY:
875 case VIDIOC_STREAMON:
876 case VIDIOC_STREAMOFF:
877 case VIDIOC_S_INPUT:
878 case VIDIOC_S_OUTPUT:
879 err = get_user(karg.vi, (s32 __user *)up);
880 compatible_arg = 0;
881 break;
882
883 case VIDIOC_G_INPUT:
884 case VIDIOC_G_OUTPUT:
885 compatible_arg = 0;
886 break;
887
888 case VIDIOC_G_EDID:
889 case VIDIOC_S_EDID:
890 err = get_v4l2_edid32(&karg.v2edid, up);
891 compatible_arg = 0;
892 break;
893
894 case VIDIOC_G_FMT:
895 case VIDIOC_S_FMT:
896 case VIDIOC_TRY_FMT:
897 err = get_v4l2_format32(&karg.v2f, up);
898 compatible_arg = 0;
899 break;
900
901 case VIDIOC_CREATE_BUFS:
902 err = get_v4l2_create32(&karg.v2crt, up);
903 compatible_arg = 0;
904 break;
905
906 case VIDIOC_PREPARE_BUF:
907 case VIDIOC_QUERYBUF:
908 case VIDIOC_QBUF:
909 case VIDIOC_DQBUF:
910 err = get_v4l2_buffer32(&karg.v2b, up);
911 compatible_arg = 0;
912 break;
913
914 case VIDIOC_S_FBUF:
915 err = get_v4l2_framebuffer32(&karg.v2fb, up);
916 compatible_arg = 0;
917 break;
918
919 case VIDIOC_G_FBUF:
920 compatible_arg = 0;
921 break;
922
923 case VIDIOC_ENUMSTD:
924 err = get_v4l2_standard32(&karg.v2s, up);
925 compatible_arg = 0;
926 break;
927
928 case VIDIOC_ENUMINPUT:
929 err = get_v4l2_input32(&karg.v2i, up);
930 compatible_arg = 0;
931 break;
932
933 case VIDIOC_G_EXT_CTRLS:
934 case VIDIOC_S_EXT_CTRLS:
935 case VIDIOC_TRY_EXT_CTRLS:
936 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
937 compatible_arg = 0;
938 break;
939 case VIDIOC_DQEVENT:
940 compatible_arg = 0;
941 break;
942 }
943 if (err)
944 return err;
945
946 if (compatible_arg)
947 err = native_ioctl(file, cmd, (unsigned long)up);
948 else {
949 mm_segment_t old_fs = get_fs();
950
951 set_fs(KERNEL_DS);
952 err = native_ioctl(file, cmd, (unsigned long)&karg);
953 set_fs(old_fs);
954 }
955
956 /* Special case: even after an error we need to put the
957 results back for these ioctls since the error_idx will
958 contain information on which control failed. */
959 switch (cmd) {
960 case VIDIOC_G_EXT_CTRLS:
961 case VIDIOC_S_EXT_CTRLS:
962 case VIDIOC_TRY_EXT_CTRLS:
963 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
964 err = -EFAULT;
965 break;
966 }
967 if (err)
968 return err;
969
970 switch (cmd) {
971 case VIDIOC_S_INPUT:
972 case VIDIOC_S_OUTPUT:
973 case VIDIOC_G_INPUT:
974 case VIDIOC_G_OUTPUT:
975 err = put_user(((s32)karg.vi), (s32 __user *)up);
976 break;
977
978 case VIDIOC_G_FBUF:
979 err = put_v4l2_framebuffer32(&karg.v2fb, up);
980 break;
981
982 case VIDIOC_DQEVENT:
983 err = put_v4l2_event32(&karg.v2ev, up);
984 break;
985
986 case VIDIOC_G_EDID:
987 case VIDIOC_S_EDID:
988 err = put_v4l2_edid32(&karg.v2edid, up);
989 break;
990
991 case VIDIOC_G_FMT:
992 case VIDIOC_S_FMT:
993 case VIDIOC_TRY_FMT:
994 err = put_v4l2_format32(&karg.v2f, up);
995 break;
996
997 case VIDIOC_CREATE_BUFS:
998 err = put_v4l2_create32(&karg.v2crt, up);
999 break;
1000
1001 case VIDIOC_QUERYBUF:
1002 case VIDIOC_QBUF:
1003 case VIDIOC_DQBUF:
1004 err = put_v4l2_buffer32(&karg.v2b, up);
1005 break;
1006
1007 case VIDIOC_ENUMSTD:
1008 err = put_v4l2_standard32(&karg.v2s, up);
1009 break;
1010
1011 case VIDIOC_ENUMINPUT:
1012 err = put_v4l2_input32(&karg.v2i, up);
1013 break;
1014 }
1015 return err;
1016 }
1017
v4l2_compat_ioctl32(struct file * file,unsigned int cmd,unsigned long arg)1018 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1019 {
1020 struct video_device *vdev = video_devdata(file);
1021 long ret = -ENOIOCTLCMD;
1022
1023 if (!file->f_op->unlocked_ioctl)
1024 return ret;
1025
1026 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1027 ret = do_video_ioctl(file, cmd, arg);
1028 else if (vdev->fops->compat_ioctl32)
1029 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1030
1031 if (ret == -ENOIOCTLCMD)
1032 pr_warn("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1033 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1034 return ret;
1035 }
1036 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
1037