drivers/media/v4l2-core/v4l2-compat-ioctl32.c

   1 /*
   2  * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
   3  *      Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
   4  *
   5  * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
   6  * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
   7  * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs
   8  * Copyright (C) 2003       Pavel Machek (pavel@ucw.cz)
   9  * Copyright (C) 2005       Philippe De Muyter (phdm@macqel.be)
  10  * Copyright (C) 2008       Hans Verkuil <hverkuil@xs4all.nl>
  11  *
  12  * These routines maintain argument size conversion between 32bit and 64bit
  13  * ioctls.
  14  */
  15
  16 #include <linux/compat.h>
  17 #include <linux/module.h>
  18 #include <linux/videodev2.h>
  19 #include <linux/v4l2-subdev.h>
  20 #include <media/v4l2-dev.h>
  21 #include <media/v4l2-fh.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-ioctl.h>
  24
  25 /* Use the same argument order as copy_in_user */
  26 #define assign_in_user(to, from)                                        \
  27 ({                                                                      \
  28         typeof(*from) __assign_tmp;                                     \
  29                                                                         \
  30         get_user(__assign_tmp, from) || put_user(__assign_tmp, to);     \
  31 })
  32
  33 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  34 {
  35         long ret = -ENOIOCTLCMD;
  36
  37         if (file->f_op->unlocked_ioctl)
  38                 ret = file->f_op->unlocked_ioctl(file, cmd, arg);
  39
  40         return ret;
  41 }
  42
  43
  44 struct v4l2_clip32 {
  45         struct v4l2_rect        c;
  46         compat_caddr_t          next;
  47 };
  48
  49 struct v4l2_window32 {
  50         struct v4l2_rect        w;
  51         __u32                   field;  /* enum v4l2_field */
  52         __u32                   chromakey;
  53         compat_caddr_t          clips; /* actually struct v4l2_clip32 * */
  54         __u32                   clipcount;
  55         compat_caddr_t          bitmap;
  56         __u8                    global_alpha;
  57 };
  58
  59 static int get_v4l2_window32(struct v4l2_window __user *kp,
  60                              struct v4l2_window32 __user *up,
  61                              void __user *aux_buf, u32 aux_space)
  62 {
  63         struct v4l2_clip32 __user *uclips;
  64         struct v4l2_clip __user *kclips;
  65         compat_caddr_t p;
  66         u32 clipcount;
  67
  68         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
  69             copy_in_user(&kp->w, &up->w, sizeof(up->w)) ||
  70             assign_in_user(&kp->field, &up->field) ||
  71             assign_in_user(&kp->chromakey, &up->chromakey) ||
  72             assign_in_user(&kp->global_alpha, &up->global_alpha) ||
  73             get_user(clipcount, &up->clipcount) ||
  74             put_user(clipcount, &kp->clipcount))
  75                 return -EFAULT;
  76         if (clipcount > 2048)
  77                 return -EINVAL;
  78         if (!clipcount)
  79                 return put_user(NULL, &kp->clips);
  80
  81         if (get_user(p, &up->clips))
  82                 return -EFAULT;
  83         uclips = compat_ptr(p);
  84         if (aux_space < clipcount * sizeof(*kclips))
  85                 return -EFAULT;
  86         kclips = aux_buf;
  87         if (put_user(kclips, &kp->clips))
  88                 return -EFAULT;
  89
  90         while (clipcount--) {
  91                 if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
  92                         return -EFAULT;
  93                 if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next))
  94                         return -EFAULT;
  95                 uclips++;
  96                 kclips++;
  97         }
  98         return 0;
  99 }
 100
 101 static int put_v4l2_window32(struct v4l2_window __user *kp,
 102                              struct v4l2_window32 __user *up)
 103 {
 104         struct v4l2_clip __user *kclips;
 105         struct v4l2_clip32 __user *uclips;
 106         compat_caddr_t p;
 107         u32 clipcount;
 108
 109         if (copy_in_user(&up->w, &kp->w, sizeof(kp->w)) ||
 110             assign_in_user(&up->field, &kp->field) ||
 111             assign_in_user(&up->chromakey, &kp->chromakey) ||
 112             assign_in_user(&up->global_alpha, &kp->global_alpha) ||
 113             get_user(clipcount, &kp->clipcount) ||
 114             put_user(clipcount, &up->clipcount))
 115                 return -EFAULT;
 116         if (!clipcount)
 117                 return 0;
 118
 119         if (get_user(kclips, &kp->clips))
 120                 return -EFAULT;
 121         if (get_user(p, &up->clips))
 122                 return -EFAULT;
 123         uclips = compat_ptr(p);
 124         while (clipcount--) {
 125                 if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
 126                         return -EFAULT;
 127                 uclips++;
 128                 kclips++;
 129         }
 130         return 0;
 131 }
 132
 133 struct v4l2_format32 {
 134         __u32   type;   /* enum v4l2_buf_type */
 135         union {
 136                 struct v4l2_pix_format  pix;
 137                 struct v4l2_pix_format_mplane   pix_mp;
 138                 struct v4l2_window32    win;
 139                 struct v4l2_vbi_format  vbi;
 140                 struct v4l2_sliced_vbi_format   sliced;
 141                 struct v4l2_sdr_format  sdr;
 142                 __u8    raw_data[200];        /* user-defined */
 143         } fmt;
 144 };
 145
 146 /**
 147  * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
 148  * @index:      on return, index of the first created buffer
 149  * @count:      entry: number of requested buffers,
 150  *              return: number of created buffers
 151  * @memory:     buffer memory type
 152  * @format:     frame format, for which buffers are requested
 153  * @reserved:   future extensions
 154  */
 155 struct v4l2_create_buffers32 {
 156         __u32                   index;
 157         __u32                   count;
 158         __u32                   memory; /* enum v4l2_memory */
 159         struct v4l2_format32    format;
 160         __u32                   reserved[8];
 161 };
 162
 163 static int __bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
 164 {
 165         u32 type;
 166
 167         if (get_user(type, &up->type))
 168                 return -EFAULT;
 169
 170         switch (type) {
 171         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 172         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
 173                 u32 clipcount;
 174
 175                 if (get_user(clipcount, &up->fmt.win.clipcount))
 176                         return -EFAULT;
 177                 if (clipcount > 2048)
 178                         return -EINVAL;
 179                 *size = clipcount * sizeof(struct v4l2_clip);
 180                 return 0;
 181         }
 182         default:
 183                 *size = 0;
 184                 return 0;
 185         }
 186 }
 187
 188 static int bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
 189 {
 190         if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 191                 return -EFAULT;
 192         return __bufsize_v4l2_format(up, size);
 193 }
 194
 195 static int __get_v4l2_format32(struct v4l2_format __user *kp,
 196                                struct v4l2_format32 __user *up,
 197                                void __user *aux_buf, u32 aux_space)
 198 {
 199         u32 type;
 200
 201         if (get_user(type, &up->type) || put_user(type, &kp->type))
 202                 return -EFAULT;
 203
 204         switch (type) {
 205         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 206         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 207                 return copy_in_user(&kp->fmt.pix, &up->fmt.pix,
 208                                     sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 209         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 210         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 211                 return copy_in_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
 212                                     sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 213         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 214         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 215                 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win,
 216                                          aux_buf, aux_space);
 217         case V4L2_BUF_TYPE_VBI_CAPTURE:
 218         case V4L2_BUF_TYPE_VBI_OUTPUT:
 219                 return copy_in_user(&kp->fmt.vbi, &up->fmt.vbi,
 220                                     sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 221         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 222         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 223                 return copy_in_user(&kp->fmt.sliced, &up->fmt.sliced,
 224                                     sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 225         case V4L2_BUF_TYPE_SDR_CAPTURE:
 226         case V4L2_BUF_TYPE_SDR_OUTPUT:
 227                 return copy_in_user(&kp->fmt.sdr, &up->fmt.sdr,
 228                                     sizeof(kp->fmt.sdr)) ? -EFAULT : 0;
 229         default:
 230                 return -EINVAL;
 231         }
 232 }
 233
 234 static int get_v4l2_format32(struct v4l2_format __user *kp,
 235                              struct v4l2_format32 __user *up,
 236                              void __user *aux_buf, u32 aux_space)
 237 {
 238         if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 239                 return -EFAULT;
 240         return __get_v4l2_format32(kp, up, aux_buf, aux_space);
 241 }
 242
 243 static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *up,
 244                                u32 *size)
 245 {
 246         if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 247                 return -EFAULT;
 248         return __bufsize_v4l2_format(&up->format, size);
 249 }
 250
 251 static int get_v4l2_create32(struct v4l2_create_buffers __user *kp,
 252                              struct v4l2_create_buffers32 __user *up,
 253                              void __user *aux_buf, u32 aux_space)
 254 {
 255         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 256             copy_in_user(kp, up,
 257                          offsetof(struct v4l2_create_buffers32, format)))
 258                 return -EFAULT;
 259         return __get_v4l2_format32(&kp->format, &up->format,
 260                                    aux_buf, aux_space);
 261 }
 262
 263 static int __put_v4l2_format32(struct v4l2_format __user *kp,
 264                                struct v4l2_format32 __user *up)
 265 {
 266         u32 type;
 267
 268         if (get_user(type, &kp->type))
 269                 return -EFAULT;
 270
 271         switch (type) {
 272         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 273         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 274                 return copy_in_user(&up->fmt.pix, &kp->fmt.pix,
 275                                     sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 276         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 277         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 278                 return copy_in_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
 279                                     sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 280         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 281         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 282                 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 283         case V4L2_BUF_TYPE_VBI_CAPTURE:
 284         case V4L2_BUF_TYPE_VBI_OUTPUT:
 285                 return copy_in_user(&up->fmt.vbi, &kp->fmt.vbi,
 286                                     sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 287         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 288         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 289                 return copy_in_user(&up->fmt.sliced, &kp->fmt.sliced,
 290                                     sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 291         case V4L2_BUF_TYPE_SDR_CAPTURE:
 292         case V4L2_BUF_TYPE_SDR_OUTPUT:
 293                 return copy_in_user(&up->fmt.sdr, &kp->fmt.sdr,
 294                                     sizeof(kp->fmt.sdr)) ? -EFAULT : 0;
 295         default:
 296                 return -EINVAL;
 297         }
 298 }
 299
 300 static int put_v4l2_format32(struct v4l2_format __user *kp,
 301                              struct v4l2_format32 __user *up)
 302 {
 303         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 304                 return -EFAULT;
 305         return __put_v4l2_format32(kp, up);
 306 }
 307
 308 static int put_v4l2_create32(struct v4l2_create_buffers __user *kp,
 309                              struct v4l2_create_buffers32 __user *up)
 310 {
 311         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 312             copy_in_user(up, kp,
 313                          offsetof(struct v4l2_create_buffers32, format)) ||
 314             copy_in_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 315                 return -EFAULT;
 316         return __put_v4l2_format32(&kp->format, &up->format);
 317 }
 318
 319 struct v4l2_standard32 {
 320         __u32                index;
 321         compat_u64           id;
 322         __u8                 name[24];
 323         struct v4l2_fract    frameperiod; /* Frames, not fields */
 324         __u32                framelines;
 325         __u32                reserved[4];
 326 };
 327
 328 static int get_v4l2_standard32(struct v4l2_standard __user *kp,
 329                                struct v4l2_standard32 __user *up)
 330 {
 331         /* other fields are not set by the user, nor used by the driver */
 332         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 333             assign_in_user(&kp->index, &up->index))
 334                 return -EFAULT;
 335         return 0;
 336 }
 337
 338 static int put_v4l2_standard32(struct v4l2_standard __user *kp,
 339                                struct v4l2_standard32 __user *up)
 340 {
 341         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 342             assign_in_user(&up->index, &kp->index) ||
 343             assign_in_user(&up->id, &kp->id) ||
 344             copy_in_user(up->name, kp->name, sizeof(up->name)) ||
 345             copy_in_user(&up->frameperiod, &kp->frameperiod,
 346                          sizeof(up->frameperiod)) ||
 347             assign_in_user(&up->framelines, &kp->framelines) ||
 348             copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 349                 return -EFAULT;
 350         return 0;
 351 }
 352
 353 struct v4l2_plane32 {
 354         __u32                   bytesused;
 355         __u32                   length;
 356         union {
 357                 __u32           mem_offset;
 358                 compat_long_t   userptr;
 359                 __s32           fd;
 360         } m;
 361         __u32                   data_offset;
 362         __u32                   reserved[11];
 363 };
 364
 365 struct v4l2_buffer32 {
 366         __u32                   index;
 367         __u32                   type;   /* enum v4l2_buf_type */
 368         __u32                   bytesused;
 369         __u32                   flags;
 370         __u32                   field;  /* enum v4l2_field */
 371         struct compat_timeval   timestamp;
 372         struct v4l2_timecode    timecode;
 373         __u32                   sequence;
 374
 375         /* memory location */
 376         __u32                   memory; /* enum v4l2_memory */
 377         union {
 378                 __u32           offset;
 379                 compat_long_t   userptr;
 380                 compat_caddr_t  planes;
 381                 __s32           fd;
 382         } m;
 383         __u32                   length;
 384         __u32                   reserved2;
 385         __u32                   reserved;
 386 };
 387
 388 static int get_v4l2_plane32(struct v4l2_plane __user *up,
 389                             struct v4l2_plane32 __user *up32,
 390                             enum v4l2_memory memory)
 391 {
 392         compat_ulong_t p;
 393
 394         if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 395             copy_in_user(&up->data_offset, &up32->data_offset,
 396                          sizeof(up->data_offset)))
 397                 return -EFAULT;
 398
 399         switch (memory) {
 400         case V4L2_MEMORY_MMAP:
 401         case V4L2_MEMORY_OVERLAY:
 402                 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
 403                                  sizeof(up32->m.mem_offset)))
 404                         return -EFAULT;
 405                 break;
 406         case V4L2_MEMORY_USERPTR:
 407                 if (get_user(p, &up32->m.userptr) ||
 408                     put_user((unsigned long)compat_ptr(p), &up->m.userptr))
 409                         return -EFAULT;
 410                 break;
 411         case V4L2_MEMORY_DMABUF:
 412                 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 413                         return -EFAULT;
 414                 break;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int put_v4l2_plane32(struct v4l2_plane __user *up,
 421                             struct v4l2_plane32 __user *up32,
 422                             enum v4l2_memory memory)
 423 {
 424         unsigned long p;
 425
 426         if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 427             copy_in_user(&up32->data_offset, &up->data_offset,
 428                          sizeof(up->data_offset)))
 429                 return -EFAULT;
 430
 431         switch (memory) {
 432         case V4L2_MEMORY_MMAP:
 433         case V4L2_MEMORY_OVERLAY:
 434                 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
 435                                  sizeof(up->m.mem_offset)))
 436                         return -EFAULT;
 437                 break;
 438         case V4L2_MEMORY_USERPTR:
 439                 if (get_user(p, &up->m.userptr) ||
 440                     put_user((compat_ulong_t)ptr_to_compat((__force void *)p),
 441                              &up32->m.userptr))
 442                         return -EFAULT;
 443                 break;
 444         case V4L2_MEMORY_DMABUF:
 445                 if (copy_in_user(&up32->m.fd, &up->m.fd, sizeof(up->m.fd)))
 446                         return -EFAULT;
 447                 break;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *up, u32 *size)
 454 {
 455         u32 type;
 456         u32 length;
 457
 458         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 459             get_user(type, &up->type) ||
 460             get_user(length, &up->length))
 461                 return -EFAULT;
 462
 463         if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
 464                 if (length > VIDEO_MAX_PLANES)
 465                         return -EINVAL;
 466
 467                 /*
 468                  * We don't really care if userspace decides to kill itself
 469                  * by passing a very big length value
 470                  */
 471                 *size = length * sizeof(struct v4l2_plane);
 472         } else {
 473                 *size = 0;
 474         }
 475         return 0;
 476 }
 477
 478 static int get_v4l2_buffer32(struct v4l2_buffer __user *kp,
 479                              struct v4l2_buffer32 __user *up,
 480                              void __user *aux_buf, u32 aux_space)
 481 {
 482         u32 type;
 483         u32 length;
 484         enum v4l2_memory memory;
 485         struct v4l2_plane32 __user *uplane32;
 486         struct v4l2_plane __user *uplane;
 487         compat_caddr_t p;
 488         int ret;
 489
 490         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 491             assign_in_user(&kp->index, &up->index) ||
 492             get_user(type, &up->type) ||
 493             put_user(type, &kp->type) ||
 494             assign_in_user(&kp->flags, &up->flags) ||
 495             get_user(memory, &up->memory) ||
 496             put_user(memory, &kp->memory) ||
 497             get_user(length, &up->length) ||
 498             put_user(length, &kp->length))
 499                 return -EFAULT;
 500
 501         if (V4L2_TYPE_IS_OUTPUT(type))
 502                 if (assign_in_user(&kp->bytesused, &up->bytesused) ||
 503                     assign_in_user(&kp->field, &up->field) ||
 504                     assign_in_user(&kp->timestamp.tv_sec,
 505                                    &up->timestamp.tv_sec) ||
 506                     assign_in_user(&kp->timestamp.tv_usec,
 507                                    &up->timestamp.tv_usec))
 508                         return -EFAULT;
 509
 510         if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
 511                 u32 num_planes = length;
 512
 513                 if (num_planes == 0) {
 514                         /*
 515                          * num_planes == 0 is legal, e.g. when userspace doesn't
 516                          * need planes array on DQBUF
 517                          */
 518                         return put_user(NULL, &kp->m.planes);
 519                 }
 520                 if (num_planes > VIDEO_MAX_PLANES)
 521                         return -EINVAL;
 522
 523                 if (get_user(p, &up->m.planes))
 524                         return -EFAULT;
 525
 526                 uplane32 = compat_ptr(p);
 527                 if (!access_ok(VERIFY_READ, uplane32,
 528                                num_planes * sizeof(*uplane32)))
 529                         return -EFAULT;
 530
 531                 /*
 532                  * We don't really care if userspace decides to kill itself
 533                  * by passing a very big num_planes value
 534                  */
 535                 if (aux_space < num_planes * sizeof(*uplane))
 536                         return -EFAULT;
 537
 538                 uplane = aux_buf;
 539                 if (put_user((__force struct v4l2_plane *)uplane,
 540                              &kp->m.planes))
 541                         return -EFAULT;
 542
 543                 while (num_planes--) {
 544                         ret = get_v4l2_plane32(uplane, uplane32, memory);
 545                         if (ret)
 546                                 return ret;
 547                         uplane++;
 548                         uplane32++;
 549                 }
 550         } else {
 551                 switch (memory) {
 552                 case V4L2_MEMORY_MMAP:
 553                 case V4L2_MEMORY_OVERLAY:
 554                         if (assign_in_user(&kp->m.offset, &up->m.offset))
 555                                 return -EFAULT;
 556                         break;
 557                 case V4L2_MEMORY_USERPTR: {
 558                         compat_ulong_t userptr;
 559
 560                         if (get_user(userptr, &up->m.userptr) ||
 561                             put_user((unsigned long)compat_ptr(userptr),
 562                                      &kp->m.userptr))
 563                                 return -EFAULT;
 564                         break;
 565                 }
 566                 case V4L2_MEMORY_DMABUF:
 567                         if (assign_in_user(&kp->m.fd, &up->m.fd))
 568                                 return -EFAULT;
 569                         break;
 570                 }
 571         }
 572
 573         return 0;
 574 }
 575
 576 static int put_v4l2_buffer32(struct v4l2_buffer __user *kp,
 577                              struct v4l2_buffer32 __user *up)
 578 {
 579         u32 type;
 580         u32 length;
 581         enum v4l2_memory memory;
 582         struct v4l2_plane32 __user *uplane32;
 583         struct v4l2_plane __user *uplane;
 584         compat_caddr_t p;
 585         int ret;
 586
 587         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 588             assign_in_user(&up->index, &kp->index) ||
 589             get_user(type, &kp->type) ||
 590             put_user(type, &up->type) ||
 591             assign_in_user(&up->flags, &kp->flags) ||
 592             get_user(memory, &kp->memory) ||
 593             put_user(memory, &up->memory))
 594                 return -EFAULT;
 595
 596         if (assign_in_user(&up->bytesused, &kp->bytesused) ||
 597             assign_in_user(&up->field, &kp->field) ||
 598             assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
 599             assign_in_user(&up->timestamp.tv_usec, &kp->timestamp.tv_usec) ||
 600             copy_in_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
 601             assign_in_user(&up->sequence, &kp->sequence) ||
 602             assign_in_user(&up->reserved2, &kp->reserved2) ||
 603             assign_in_user(&up->reserved, &kp->reserved) ||
 604             get_user(length, &kp->length) ||
 605             put_user(length, &up->length))
 606                 return -EFAULT;
 607
 608         if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
 609                 u32 num_planes = length;
 610
 611                 if (num_planes == 0)
 612                         return 0;
 613
 614                 if (get_user(uplane, ((__force struct v4l2_plane __user **)&kp->m.planes)))
 615                         return -EFAULT;
 616                 if (get_user(p, &up->m.planes))
 617                         return -EFAULT;
 618                 uplane32 = compat_ptr(p);
 619
 620                 while (num_planes--) {
 621                         ret = put_v4l2_plane32(uplane, uplane32, memory);
 622                         if (ret)
 623                                 return ret;
 624                         ++uplane;
 625                         ++uplane32;
 626                 }
 627         } else {
 628                 switch (memory) {
 629                 case V4L2_MEMORY_MMAP:
 630                 case V4L2_MEMORY_OVERLAY:
 631                         if (assign_in_user(&up->m.offset, &kp->m.offset))
 632                                 return -EFAULT;
 633                         break;
 634                 case V4L2_MEMORY_USERPTR:
 635                         if (assign_in_user(&up->m.userptr, &kp->m.userptr))
 636                                 return -EFAULT;
 637                         break;
 638                 case V4L2_MEMORY_DMABUF:
 639                         if (assign_in_user(&up->m.fd, &kp->m.fd))
 640                                 return -EFAULT;
 641                         break;
 642                 }
 643         }
 644
 645         return 0;
 646 }
 647
 648 struct v4l2_framebuffer32 {
 649         __u32                   capability;
 650         __u32                   flags;
 651         compat_caddr_t          base;
 652         struct {
 653                 __u32           width;
 654                 __u32           height;
 655                 __u32           pixelformat;
 656                 __u32           field;
 657                 __u32           bytesperline;
 658                 __u32           sizeimage;
 659                 __u32           colorspace;
 660                 __u32           priv;
 661         } fmt;
 662 };
 663
 664 static int get_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
 665                                   struct v4l2_framebuffer32 __user *up)
 666 {
 667         compat_caddr_t tmp;
 668
 669         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 670             get_user(tmp, &up->base) ||
 671             put_user((__force void *)compat_ptr(tmp), &kp->base) ||
 672             assign_in_user(&kp->capability, &up->capability) ||
 673             assign_in_user(&kp->flags, &up->flags) ||
 674             copy_in_user(&kp->fmt, &up->fmt, sizeof(kp->fmt)))
 675                 return -EFAULT;
 676         return 0;
 677 }
 678
 679 static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
 680                                   struct v4l2_framebuffer32 __user *up)
 681 {
 682         void *base;
 683
 684         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 685             get_user(base, &kp->base) ||
 686             put_user(ptr_to_compat(base), &up->base) ||
 687             assign_in_user(&up->capability, &kp->capability) ||
 688             assign_in_user(&up->flags, &kp->flags) ||
 689             copy_in_user(&up->fmt, &kp->fmt, sizeof(kp->fmt)))
 690                 return -EFAULT;
 691         return 0;
 692 }
 693
 694 struct v4l2_input32 {
 695         __u32        index;             /*  Which input */
 696         __u8         name[32];          /*  Label */
 697         __u32        type;              /*  Type of input */
 698         __u32        audioset;          /*  Associated audios (bitfield) */
 699         __u32        tuner;             /*  Associated tuner */
 700         compat_u64   std;
 701         __u32        status;
 702         __u32        capabilities;
 703         __u32        reserved[3];
 704 };
 705
 706 /*
 707  * The 64-bit v4l2_input struct has extra padding at the end of the struct.
 708  * Otherwise it is identical to the 32-bit version.
 709  */
 710 static inline int get_v4l2_input32(struct v4l2_input __user *kp,
 711                                    struct v4l2_input32 __user *up)
 712 {
 713         if (copy_in_user(kp, up, sizeof(*up)))
 714                 return -EFAULT;
 715         return 0;
 716 }
 717
 718 static inline int put_v4l2_input32(struct v4l2_input __user *kp,
 719                                    struct v4l2_input32 __user *up)
 720 {
 721         if (copy_in_user(up, kp, sizeof(*up)))
 722                 return -EFAULT;
 723         return 0;
 724 }
 725
 726 struct v4l2_ext_controls32 {
 727         __u32 which;
 728         __u32 count;
 729         __u32 error_idx;
 730         __u32 reserved[2];
 731         compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
 732 };
 733
 734 struct v4l2_ext_control32 {
 735         __u32 id;
 736         __u32 size;
 737         __u32 reserved2[1];
 738         union {
 739                 __s32 value;
 740                 __s64 value64;
 741                 compat_caddr_t string; /* actually char * */
 742         };
 743 } __attribute__ ((packed));
 744
 745 /* Return true if this control is a pointer type. */
 746 static inline bool ctrl_is_pointer(struct file *file, u32 id)
 747 {
 748         struct video_device *vdev = video_devdata(file);
 749         struct v4l2_fh *fh = NULL;
 750         struct v4l2_ctrl_handler *hdl = NULL;
 751         struct v4l2_query_ext_ctrl qec = { id };
 752         const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
 753
 754         if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
 755                 fh = file->private_data;
 756
 757         if (fh && fh->ctrl_handler)
 758                 hdl = fh->ctrl_handler;
 759         else if (vdev->ctrl_handler)
 760                 hdl = vdev->ctrl_handler;
 761
 762         if (hdl) {
 763                 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
 764
 765                 return ctrl && ctrl->is_ptr;
 766         }
 767
 768         if (!ops || !ops->vidioc_query_ext_ctrl)
 769                 return false;
 770
 771         return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
 772                 (qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 773 }
 774
 775 static int bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *up,
 776                                      u32 *size)
 777 {
 778         u32 count;
 779
 780         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 781             get_user(count, &up->count))
 782                 return -EFAULT;
 783         if (count > V4L2_CID_MAX_CTRLS)
 784                 return -EINVAL;
 785         *size = count * sizeof(struct v4l2_ext_control);
 786         return 0;
 787 }
 788
 789 static int get_v4l2_ext_controls32(struct file *file,
 790                                    struct v4l2_ext_controls __user *kp,
 791                                    struct v4l2_ext_controls32 __user *up,
 792                                    void __user *aux_buf, u32 aux_space)
 793 {
 794         struct v4l2_ext_control32 __user *ucontrols;
 795         struct v4l2_ext_control __user *kcontrols;
 796         u32 count;
 797         u32 n;
 798         compat_caddr_t p;
 799
 800         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 801             assign_in_user(&kp->which, &up->which) ||
 802             get_user(count, &up->count) ||
 803             put_user(count, &kp->count) ||
 804             assign_in_user(&kp->error_idx, &up->error_idx) ||
 805             copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 806                 return -EFAULT;
 807
 808         if (count == 0)
 809                 return put_user(NULL, &kp->controls);
 810         if (count > V4L2_CID_MAX_CTRLS)
 811                 return -EINVAL;
 812         if (get_user(p, &up->controls))
 813                 return -EFAULT;
 814         ucontrols = compat_ptr(p);
 815         if (!access_ok(VERIFY_READ, ucontrols, count * sizeof(*ucontrols)))
 816                 return -EFAULT;
 817         if (aux_space < count * sizeof(*kcontrols))
 818                 return -EFAULT;
 819         kcontrols = aux_buf;
 820         if (put_user((__force struct v4l2_ext_control *)kcontrols,
 821                      &kp->controls))
 822                 return -EFAULT;
 823
 824         for (n = 0; n < count; n++) {
 825                 u32 id;
 826
 827                 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
 828                         return -EFAULT;
 829
 830                 if (get_user(id, &kcontrols->id))
 831                         return -EFAULT;
 832
 833                 if (ctrl_is_pointer(file, id)) {
 834                         void __user *s;
 835
 836                         if (get_user(p, &ucontrols->string))
 837                                 return -EFAULT;
 838                         s = compat_ptr(p);
 839                         if (put_user(s, &kcontrols->string))
 840                                 return -EFAULT;
 841                 }
 842                 ucontrols++;
 843                 kcontrols++;
 844         }
 845         return 0;
 846 }
 847
 848 static int put_v4l2_ext_controls32(struct file *file,
 849                                    struct v4l2_ext_controls __user *kp,
 850                                    struct v4l2_ext_controls32 __user *up)
 851 {
 852         struct v4l2_ext_control32 __user *ucontrols;
 853         struct v4l2_ext_control __user *kcontrols;
 854         u32 count;
 855         u32 n;
 856         compat_caddr_t p;
 857
 858         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 859             assign_in_user(&up->which, &kp->which) ||
 860             get_user(count, &kp->count) ||
 861             put_user(count, &up->count) ||
 862             assign_in_user(&up->error_idx, &kp->error_idx) ||
 863             copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)) ||
 864             get_user(kcontrols, &kp->controls))
 865                 return -EFAULT;
 866
 867         if (!count || count > (U32_MAX/sizeof(*ucontrols)))
 868                 return 0;
 869         if (get_user(p, &up->controls))
 870                 return -EFAULT;
 871         ucontrols = compat_ptr(p);
 872         if (!access_ok(VERIFY_WRITE, ucontrols, count * sizeof(*ucontrols)))
 873                 return -EFAULT;
 874
 875         for (n = 0; n < count; n++) {
 876                 unsigned int size = sizeof(*ucontrols);
 877                 u32 id;
 878
 879                 if (get_user(id, &kcontrols->id) ||
 880                     put_user(id, &ucontrols->id) ||
 881                     assign_in_user(&ucontrols->size, &kcontrols->size) ||
 882                     copy_in_user(&ucontrols->reserved2, &kcontrols->reserved2,
 883                                  sizeof(ucontrols->reserved2)))
 884                         return -EFAULT;
 885
 886                 /*
 887                  * Do not modify the pointer when copying a pointer control.
 888                  * The contents of the pointer was changed, not the pointer
 889                  * itself.
 890                  */
 891                 if (ctrl_is_pointer(file, id))
 892                         size -= sizeof(ucontrols->value64);
 893
 894                 if (copy_in_user(ucontrols, kcontrols, size))
 895                         return -EFAULT;
 896
 897                 ucontrols++;
 898                 kcontrols++;
 899         }
 900         return 0;
 901 }
 902
 903 struct v4l2_event32 {
 904         __u32                           type;
 905         union {
 906                 compat_s64              value64;
 907                 __u8                    data[64];
 908         } u;
 909         __u32                           pending;
 910         __u32                           sequence;
 911         struct compat_timespec          timestamp;
 912         __u32                           id;
 913         __u32                           reserved[8];
 914 };
 915
 916 static int put_v4l2_event32(struct v4l2_event __user *kp,
 917                             struct v4l2_event32 __user *up)
 918 {
 919         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 920             assign_in_user(&up->type, &kp->type) ||
 921             copy_in_user(&up->u, &kp->u, sizeof(kp->u)) ||
 922             assign_in_user(&up->pending, &kp->pending) ||
 923             assign_in_user(&up->sequence, &kp->sequence) ||
 924             assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
 925             assign_in_user(&up->timestamp.tv_nsec, &kp->timestamp.tv_nsec) ||
 926             assign_in_user(&up->id, &kp->id) ||
 927             copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 928                 return -EFAULT;
 929         return 0;
 930 }
 931
 932 struct v4l2_edid32 {
 933         __u32 pad;
 934         __u32 start_block;
 935         __u32 blocks;
 936         __u32 reserved[5];
 937         compat_caddr_t edid;
 938 };
 939
 940 static int get_v4l2_edid32(struct v4l2_edid __user *kp,
 941                            struct v4l2_edid32 __user *up)
 942 {
 943         compat_uptr_t tmp;
 944
 945         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 946             assign_in_user(&kp->pad, &up->pad) ||
 947             assign_in_user(&kp->start_block, &up->start_block) ||
 948             assign_in_user(&kp->blocks, &up->blocks) ||
 949             get_user(tmp, &up->edid) ||
 950             put_user(compat_ptr(tmp), &kp->edid) ||
 951             copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 952                 return -EFAULT;
 953         return 0;
 954 }
 955
 956 static int put_v4l2_edid32(struct v4l2_edid __user *kp,
 957                            struct v4l2_edid32 __user *up)
 958 {
 959         void *edid;
 960
 961         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 962             assign_in_user(&up->pad, &kp->pad) ||
 963             assign_in_user(&up->start_block, &kp->start_block) ||
 964             assign_in_user(&up->blocks, &kp->blocks) ||
 965             get_user(edid, &kp->edid) ||
 966             put_user(ptr_to_compat(edid), &up->edid) ||
 967             copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 968                 return -EFAULT;
 969         return 0;
 970 }
 971
 972
 973 #define VIDIOC_G_FMT32          _IOWR('V',  4, struct v4l2_format32)
 974 #define VIDIOC_S_FMT32          _IOWR('V',  5, struct v4l2_format32)
 975 #define VIDIOC_QUERYBUF32       _IOWR('V',  9, struct v4l2_buffer32)
 976 #define VIDIOC_G_FBUF32         _IOR ('V', 10, struct v4l2_framebuffer32)
 977 #define VIDIOC_S_FBUF32         _IOW ('V', 11, struct v4l2_framebuffer32)
 978 #define VIDIOC_QBUF32           _IOWR('V', 15, struct v4l2_buffer32)
 979 #define VIDIOC_DQBUF32          _IOWR('V', 17, struct v4l2_buffer32)
 980 #define VIDIOC_ENUMSTD32        _IOWR('V', 25, struct v4l2_standard32)
 981 #define VIDIOC_ENUMINPUT32      _IOWR('V', 26, struct v4l2_input32)
 982 #define VIDIOC_G_EDID32         _IOWR('V', 40, struct v4l2_edid32)
 983 #define VIDIOC_S_EDID32         _IOWR('V', 41, struct v4l2_edid32)
 984 #define VIDIOC_TRY_FMT32        _IOWR('V', 64, struct v4l2_format32)
 985 #define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
 986 #define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
 987 #define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
 988 #define VIDIOC_DQEVENT32        _IOR ('V', 89, struct v4l2_event32)
 989 #define VIDIOC_CREATE_BUFS32    _IOWR('V', 92, struct v4l2_create_buffers32)
 990 #define VIDIOC_PREPARE_BUF32    _IOWR('V', 93, struct v4l2_buffer32)
 991
 992 #define VIDIOC_OVERLAY32        _IOW ('V', 14, s32)
 993 #define VIDIOC_STREAMON32       _IOW ('V', 18, s32)
 994 #define VIDIOC_STREAMOFF32      _IOW ('V', 19, s32)
 995 #define VIDIOC_G_INPUT32        _IOR ('V', 38, s32)
 996 #define VIDIOC_S_INPUT32        _IOWR('V', 39, s32)
 997 #define VIDIOC_G_OUTPUT32       _IOR ('V', 46, s32)
 998 #define VIDIOC_S_OUTPUT32       _IOWR('V', 47, s32)
 999
1000 static int alloc_userspace(unsigned int size, u32 aux_space,
1001                            void __user **up_native)
1002 {
1003         *up_native = compat_alloc_user_space(size + aux_space);
1004         if (!*up_native)
1005                 return -ENOMEM;
1006         if (clear_user(*up_native, size))
1007                 return -EFAULT;
1008         return 0;
1009 }
1010
1011 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1012 {
1013         void __user *up = compat_ptr(arg);
1014         void __user *up_native = NULL;
1015         void __user *aux_buf;
1016         u32 aux_space;
1017         int compatible_arg = 1;
1018         long err = 0;
1019
1020         /* First, convert the command. */
1021         switch (cmd) {
1022         case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
1023         case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
1024         case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
1025         case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
1026         case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
1027         case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
1028         case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
1029         case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
1030         case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
1031         case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
1032         case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
1033         case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
1034         case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
1035         case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
1036         case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
1037         case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
1038         case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
1039         case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
1040         case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
1041         case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
1042         case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
1043         case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
1044         case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
1045         case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
1046         case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
1047         }
1048
1049         switch (cmd) {
1050         case VIDIOC_OVERLAY:
1051         case VIDIOC_STREAMON:
1052         case VIDIOC_STREAMOFF:
1053         case VIDIOC_S_INPUT:
1054         case VIDIOC_S_OUTPUT:
1055                 err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
1056                 if (!err && assign_in_user((unsigned int __user *)up_native,
1057                                            (compat_uint_t __user *)up))
1058                         err = -EFAULT;
1059                 compatible_arg = 0;
1060                 break;
1061
1062         case VIDIOC_G_INPUT:
1063         case VIDIOC_G_OUTPUT:
1064                 err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
1065                 compatible_arg = 0;
1066                 break;
1067
1068         case VIDIOC_G_EDID:
1069         case VIDIOC_S_EDID:
1070                 err = alloc_userspace(sizeof(struct v4l2_edid), 0, &up_native);
1071                 if (!err)
1072                         err = get_v4l2_edid32(up_native, up);
1073                 compatible_arg = 0;
1074                 break;
1075
1076         case VIDIOC_G_FMT:
1077         case VIDIOC_S_FMT:
1078         case VIDIOC_TRY_FMT:
1079                 err = bufsize_v4l2_format(up, &aux_space);
1080                 if (!err)
1081                         err = alloc_userspace(sizeof(struct v4l2_format),
1082                                               aux_space, &up_native);
1083                 if (!err) {
1084                         aux_buf = up_native + sizeof(struct v4l2_format);
1085                         err = get_v4l2_format32(up_native, up,
1086                                                 aux_buf, aux_space);
1087                 }
1088                 compatible_arg = 0;
1089                 break;
1090
1091         case VIDIOC_CREATE_BUFS:
1092                 err = bufsize_v4l2_create(up, &aux_space);
1093                 if (!err)
1094                         err = alloc_userspace(sizeof(struct v4l2_create_buffers),
1095                                               aux_space, &up_native);
1096                 if (!err) {
1097                         aux_buf = up_native + sizeof(struct v4l2_create_buffers);
1098                         err = get_v4l2_create32(up_native, up,
1099                                                 aux_buf, aux_space);
1100                 }
1101                 compatible_arg = 0;
1102                 break;
1103
1104         case VIDIOC_PREPARE_BUF:
1105         case VIDIOC_QUERYBUF:
1106         case VIDIOC_QBUF:
1107         case VIDIOC_DQBUF:
1108                 err = bufsize_v4l2_buffer(up, &aux_space);
1109                 if (!err)
1110                         err = alloc_userspace(sizeof(struct v4l2_buffer),
1111                                               aux_space, &up_native);
1112                 if (!err) {
1113                         aux_buf = up_native + sizeof(struct v4l2_buffer);
1114                         err = get_v4l2_buffer32(up_native, up,
1115                                                 aux_buf, aux_space);
1116                 }
1117                 compatible_arg = 0;
1118                 break;
1119
1120         case VIDIOC_S_FBUF:
1121                 err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
1122                                       &up_native);
1123                 if (!err)
1124                         err = get_v4l2_framebuffer32(up_native, up);
1125                 compatible_arg = 0;
1126                 break;
1127
1128         case VIDIOC_G_FBUF:
1129                 err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
1130                                       &up_native);
1131                 compatible_arg = 0;
1132                 break;
1133
1134         case VIDIOC_ENUMSTD:
1135                 err = alloc_userspace(sizeof(struct v4l2_standard), 0,
1136                                       &up_native);
1137                 if (!err)
1138                         err = get_v4l2_standard32(up_native, up);
1139                 compatible_arg = 0;
1140                 break;
1141
1142         case VIDIOC_ENUMINPUT:
1143                 err = alloc_userspace(sizeof(struct v4l2_input), 0, &up_native);
1144                 if (!err)
1145                         err = get_v4l2_input32(up_native, up);
1146                 compatible_arg = 0;
1147                 break;
1148
1149         case VIDIOC_G_EXT_CTRLS:
1150         case VIDIOC_S_EXT_CTRLS:
1151         case VIDIOC_TRY_EXT_CTRLS:
1152                 err = bufsize_v4l2_ext_controls(up, &aux_space);
1153                 if (!err)
1154                         err = alloc_userspace(sizeof(struct v4l2_ext_controls),
1155                                               aux_space, &up_native);
1156                 if (!err) {
1157                         aux_buf = up_native + sizeof(struct v4l2_ext_controls);
1158                         err = get_v4l2_ext_controls32(file, up_native, up,
1159                                                       aux_buf, aux_space);
1160                 }
1161                 compatible_arg = 0;
1162                 break;
1163         case VIDIOC_DQEVENT:
1164                 err = alloc_userspace(sizeof(struct v4l2_event), 0, &up_native);
1165                 compatible_arg = 0;
1166                 break;
1167         }
1168         if (err)
1169                 return err;
1170
1171         if (compatible_arg)
1172                 err = native_ioctl(file, cmd, (unsigned long)up);
1173         else
1174                 err = native_ioctl(file, cmd, (unsigned long)up_native);
1175
1176         if (err == -ENOTTY)
1177                 return err;
1178
1179         /*
1180          * Special case: even after an error we need to put the
1181          * results back for these ioctls since the error_idx will
1182          * contain information on which control failed.
1183          */
1184         switch (cmd) {
1185         case VIDIOC_G_EXT_CTRLS:
1186         case VIDIOC_S_EXT_CTRLS:
1187         case VIDIOC_TRY_EXT_CTRLS:
1188                 if (put_v4l2_ext_controls32(file, up_native, up))
1189                         err = -EFAULT;
1190                 break;
1191         case VIDIOC_S_EDID:
1192                 if (put_v4l2_edid32(up_native, up))
1193                         err = -EFAULT;
1194                 break;
1195         }
1196         if (err)
1197                 return err;
1198
1199         switch (cmd) {
1200         case VIDIOC_S_INPUT:
1201         case VIDIOC_S_OUTPUT:
1202         case VIDIOC_G_INPUT:
1203         case VIDIOC_G_OUTPUT:
1204                 if (assign_in_user((compat_uint_t __user *)up,
1205                                    ((unsigned int __user *)up_native)))
1206                         err = -EFAULT;
1207                 break;
1208
1209         case VIDIOC_G_FBUF:
1210                 err = put_v4l2_framebuffer32(up_native, up);
1211                 break;
1212
1213         case VIDIOC_DQEVENT:
1214                 err = put_v4l2_event32(up_native, up);
1215                 break;
1216
1217         case VIDIOC_G_EDID:
1218                 err = put_v4l2_edid32(up_native, up);
1219                 break;
1220
1221         case VIDIOC_G_FMT:
1222         case VIDIOC_S_FMT:
1223         case VIDIOC_TRY_FMT:
1224                 err = put_v4l2_format32(up_native, up);
1225                 break;
1226
1227         case VIDIOC_CREATE_BUFS:
1228                 err = put_v4l2_create32(up_native, up);
1229                 break;
1230
1231         case VIDIOC_PREPARE_BUF:
1232         case VIDIOC_QUERYBUF:
1233         case VIDIOC_QBUF:
1234         case VIDIOC_DQBUF:
1235                 err = put_v4l2_buffer32(up_native, up);
1236                 break;
1237
1238         case VIDIOC_ENUMSTD:
1239                 err = put_v4l2_standard32(up_native, up);
1240                 break;
1241
1242         case VIDIOC_ENUMINPUT:
1243                 err = put_v4l2_input32(up_native, up);
1244                 break;
1245         }
1246         return err;
1247 }
1248
1249 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1250 {
1251         struct video_device *vdev = video_devdata(file);
1252         long ret = -ENOIOCTLCMD;
1253
1254         if (!file->f_op->unlocked_ioctl)
1255                 return ret;
1256
1257         if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1258                 ret = do_video_ioctl(file, cmd, arg);
1259         else if (vdev->fops->compat_ioctl32)
1260                 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1261
1262         if (ret == -ENOIOCTLCMD)
1263                 pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1264                          _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1265         return ret;
1266 }
1267 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);