1 /* 2 * ioctl32.c: Conversion between 32bit and 64bit native ioctls. 3 * Separated from fs stuff by Arnd Bergmann <arnd@arndb.de> 4 * 5 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) 6 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) 7 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs 8 * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) 9 * Copyright (C) 2005 Philippe De Muyter (phdm@macqel.be) 10 * Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> 11 * 12 * These routines maintain argument size conversion between 32bit and 64bit 13 * ioctls. 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/module.h> 18 #include <linux/videodev2.h> 19 #include <linux/v4l2-subdev.h> 20 #include <media/v4l2-dev.h> 21 #include <media/v4l2-ioctl.h> 22 23 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 24 { 25 long ret = -ENOIOCTLCMD; 26 27 if (file->f_op->unlocked_ioctl) 28 ret = file->f_op->unlocked_ioctl(file, cmd, arg); 29 30 return ret; 31 } 32 33 34 struct v4l2_clip32 { 35 struct v4l2_rect c; 36 compat_caddr_t next; 37 }; 38 39 struct v4l2_window32 { 40 struct v4l2_rect w; 41 __u32 field; /* enum v4l2_field */ 42 __u32 chromakey; 43 compat_caddr_t clips; /* actually struct v4l2_clip32 * */ 44 __u32 clipcount; 45 compat_caddr_t bitmap; 46 }; 47 48 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up) 49 { 50 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) || 51 copy_from_user(&kp->w, &up->w, sizeof(up->w)) || 52 get_user(kp->field, &up->field) || 53 get_user(kp->chromakey, &up->chromakey) || 54 get_user(kp->clipcount, &up->clipcount)) 55 return -EFAULT; 56 if (kp->clipcount > 2048) 57 return -EINVAL; 58 if (kp->clipcount) { 59 struct v4l2_clip32 __user *uclips; 60 struct v4l2_clip __user *kclips; 61 int n = kp->clipcount; 62 compat_caddr_t p; 63 64 if (get_user(p, &up->clips)) 65 return -EFAULT; 66 uclips = compat_ptr(p); 67 kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip)); 68 kp->clips = kclips; 69 while (--n >= 0) { 70 if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c))) 71 return -EFAULT; 72 if (put_user(n ? kclips + 1 : NULL, &kclips->next)) 73 return -EFAULT; 74 uclips += 1; 75 kclips += 1; 76 } 77 } else 78 kp->clips = NULL; 79 return 0; 80 } 81 82 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up) 83 { 84 if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) || 85 put_user(kp->field, &up->field) || 86 put_user(kp->chromakey, &up->chromakey) || 87 put_user(kp->clipcount, &up->clipcount)) 88 return -EFAULT; 89 return 0; 90 } 91 92 static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up) 93 { 94 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format))) 95 return -EFAULT; 96 return 0; 97 } 98 99 static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp, 100 struct v4l2_pix_format_mplane __user *up) 101 { 102 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane))) 103 return -EFAULT; 104 return 0; 105 } 106 107 static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up) 108 { 109 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format))) 110 return -EFAULT; 111 return 0; 112 } 113 114 static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp, 115 struct v4l2_pix_format_mplane __user *up) 116 { 117 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane))) 118 return -EFAULT; 119 return 0; 120 } 121 122 static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up) 123 { 124 if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format))) 125 return -EFAULT; 126 return 0; 127 } 128 129 static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up) 130 { 131 if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format))) 132 return -EFAULT; 133 return 0; 134 } 135 136 static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up) 137 { 138 if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format))) 139 return -EFAULT; 140 return 0; 141 } 142 143 static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up) 144 { 145 if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format))) 146 return -EFAULT; 147 return 0; 148 } 149 150 static inline int get_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up) 151 { 152 if (copy_from_user(kp, up, sizeof(struct v4l2_sdr_format))) 153 return -EFAULT; 154 return 0; 155 } 156 157 static inline int put_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up) 158 { 159 if (copy_to_user(up, kp, sizeof(struct v4l2_sdr_format))) 160 return -EFAULT; 161 return 0; 162 } 163 164 struct v4l2_format32 { 165 __u32 type; /* enum v4l2_buf_type */ 166 union { 167 struct v4l2_pix_format pix; 168 struct v4l2_pix_format_mplane pix_mp; 169 struct v4l2_window32 win; 170 struct v4l2_vbi_format vbi; 171 struct v4l2_sliced_vbi_format sliced; 172 struct v4l2_sdr_format sdr; 173 __u8 raw_data[200]; /* user-defined */ 174 } fmt; 175 }; 176 177 /** 178 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument 179 * @index: on return, index of the first created buffer 180 * @count: entry: number of requested buffers, 181 * return: number of created buffers 182 * @memory: buffer memory type 183 * @format: frame format, for which buffers are requested 184 * @reserved: future extensions 185 */ 186 struct v4l2_create_buffers32 { 187 __u32 index; 188 __u32 count; 189 __u32 memory; /* enum v4l2_memory */ 190 struct v4l2_format32 format; 191 __u32 reserved[8]; 192 }; 193 194 static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) 195 { 196 if (get_user(kp->type, &up->type)) 197 return -EFAULT; 198 199 switch (kp->type) { 200 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 201 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 202 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix); 203 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 205 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp, 206 &up->fmt.pix_mp); 207 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 208 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 209 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win); 210 case V4L2_BUF_TYPE_VBI_CAPTURE: 211 case V4L2_BUF_TYPE_VBI_OUTPUT: 212 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi); 213 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 214 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 215 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced); 216 case V4L2_BUF_TYPE_SDR_CAPTURE: 217 case V4L2_BUF_TYPE_SDR_OUTPUT: 218 return get_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr); 219 default: 220 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n", 221 kp->type); 222 return -EINVAL; 223 } 224 } 225 226 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) 227 { 228 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32))) 229 return -EFAULT; 230 return __get_v4l2_format32(kp, up); 231 } 232 233 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up) 234 { 235 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) || 236 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format))) 237 return -EFAULT; 238 return __get_v4l2_format32(&kp->format, &up->format); 239 } 240 241 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) 242 { 243 if (put_user(kp->type, &up->type)) 244 return -EFAULT; 245 246 switch (kp->type) { 247 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 248 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 249 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix); 250 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 251 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 252 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp, 253 &up->fmt.pix_mp); 254 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 255 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 256 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win); 257 case V4L2_BUF_TYPE_VBI_CAPTURE: 258 case V4L2_BUF_TYPE_VBI_OUTPUT: 259 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi); 260 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 261 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 262 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced); 263 case V4L2_BUF_TYPE_SDR_CAPTURE: 264 case V4L2_BUF_TYPE_SDR_OUTPUT: 265 return put_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr); 266 default: 267 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n", 268 kp->type); 269 return -EINVAL; 270 } 271 } 272 273 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) 274 { 275 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32))) 276 return -EFAULT; 277 return __put_v4l2_format32(kp, up); 278 } 279 280 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up) 281 { 282 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) || 283 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format))) 284 return -EFAULT; 285 return __put_v4l2_format32(&kp->format, &up->format); 286 } 287 288 struct v4l2_standard32 { 289 __u32 index; 290 compat_u64 id; 291 __u8 name[24]; 292 struct v4l2_fract frameperiod; /* Frames, not fields */ 293 __u32 framelines; 294 __u32 reserved[4]; 295 }; 296 297 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up) 298 { 299 /* other fields are not set by the user, nor used by the driver */ 300 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) || 301 get_user(kp->index, &up->index)) 302 return -EFAULT; 303 return 0; 304 } 305 306 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up) 307 { 308 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) || 309 put_user(kp->index, &up->index) || 310 put_user(kp->id, &up->id) || 311 copy_to_user(up->name, kp->name, 24) || 312 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) || 313 put_user(kp->framelines, &up->framelines) || 314 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32))) 315 return -EFAULT; 316 return 0; 317 } 318 319 struct v4l2_plane32 { 320 __u32 bytesused; 321 __u32 length; 322 union { 323 __u32 mem_offset; 324 compat_long_t userptr; 325 __s32 fd; 326 } m; 327 __u32 data_offset; 328 __u32 reserved[11]; 329 }; 330 331 struct v4l2_buffer32 { 332 __u32 index; 333 __u32 type; /* enum v4l2_buf_type */ 334 __u32 bytesused; 335 __u32 flags; 336 __u32 field; /* enum v4l2_field */ 337 struct compat_timeval timestamp; 338 struct v4l2_timecode timecode; 339 __u32 sequence; 340 341 /* memory location */ 342 __u32 memory; /* enum v4l2_memory */ 343 union { 344 __u32 offset; 345 compat_long_t userptr; 346 compat_caddr_t planes; 347 __s32 fd; 348 } m; 349 __u32 length; 350 __u32 reserved2; 351 __u32 reserved; 352 }; 353 354 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32, 355 enum v4l2_memory memory) 356 { 357 void __user *up_pln; 358 compat_long_t p; 359 360 if (copy_in_user(up, up32, 2 * sizeof(__u32)) || 361 copy_in_user(&up->data_offset, &up32->data_offset, 362 sizeof(__u32))) 363 return -EFAULT; 364 365 if (memory == V4L2_MEMORY_USERPTR) { 366 if (get_user(p, &up32->m.userptr)) 367 return -EFAULT; 368 up_pln = compat_ptr(p); 369 if (put_user((unsigned long)up_pln, &up->m.userptr)) 370 return -EFAULT; 371 } else if (memory == V4L2_MEMORY_DMABUF) { 372 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int))) 373 return -EFAULT; 374 } else { 375 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset, 376 sizeof(__u32))) 377 return -EFAULT; 378 } 379 380 return 0; 381 } 382 383 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32, 384 enum v4l2_memory memory) 385 { 386 if (copy_in_user(up32, up, 2 * sizeof(__u32)) || 387 copy_in_user(&up32->data_offset, &up->data_offset, 388 sizeof(__u32))) 389 return -EFAULT; 390 391 /* For MMAP, driver might've set up the offset, so copy it back. 392 * USERPTR stays the same (was userspace-provided), so no copying. */ 393 if (memory == V4L2_MEMORY_MMAP) 394 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset, 395 sizeof(__u32))) 396 return -EFAULT; 397 /* For DMABUF, driver might've set up the fd, so copy it back. */ 398 if (memory == V4L2_MEMORY_DMABUF) 399 if (copy_in_user(&up32->m.fd, &up->m.fd, 400 sizeof(int))) 401 return -EFAULT; 402 403 return 0; 404 } 405 406 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up) 407 { 408 struct v4l2_plane32 __user *uplane32; 409 struct v4l2_plane __user *uplane; 410 compat_caddr_t p; 411 int num_planes; 412 int ret; 413 414 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) || 415 get_user(kp->index, &up->index) || 416 get_user(kp->type, &up->type) || 417 get_user(kp->flags, &up->flags) || 418 get_user(kp->memory, &up->memory) || 419 get_user(kp->length, &up->length)) 420 return -EFAULT; 421 422 if (V4L2_TYPE_IS_OUTPUT(kp->type)) 423 if (get_user(kp->bytesused, &up->bytesused) || 424 get_user(kp->field, &up->field) || 425 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) || 426 get_user(kp->timestamp.tv_usec, 427 &up->timestamp.tv_usec)) 428 return -EFAULT; 429 430 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) { 431 num_planes = kp->length; 432 if (num_planes == 0) { 433 kp->m.planes = NULL; 434 /* num_planes == 0 is legal, e.g. when userspace doesn't 435 * need planes array on DQBUF*/ 436 return 0; 437 } 438 439 if (get_user(p, &up->m.planes)) 440 return -EFAULT; 441 442 uplane32 = compat_ptr(p); 443 if (!access_ok(VERIFY_READ, uplane32, 444 num_planes * sizeof(struct v4l2_plane32))) 445 return -EFAULT; 446 447 /* We don't really care if userspace decides to kill itself 448 * by passing a very big num_planes value */ 449 uplane = compat_alloc_user_space(num_planes * 450 sizeof(struct v4l2_plane)); 451 kp->m.planes = (__force struct v4l2_plane *)uplane; 452 453 while (--num_planes >= 0) { 454 ret = get_v4l2_plane32(uplane, uplane32, kp->memory); 455 if (ret) 456 return ret; 457 ++uplane; 458 ++uplane32; 459 } 460 } else { 461 switch (kp->memory) { 462 case V4L2_MEMORY_MMAP: 463 if (get_user(kp->m.offset, &up->m.offset)) 464 return -EFAULT; 465 break; 466 case V4L2_MEMORY_USERPTR: 467 { 468 compat_long_t tmp; 469 470 if (get_user(tmp, &up->m.userptr)) 471 return -EFAULT; 472 473 kp->m.userptr = (unsigned long)compat_ptr(tmp); 474 } 475 break; 476 case V4L2_MEMORY_OVERLAY: 477 if (get_user(kp->m.offset, &up->m.offset)) 478 return -EFAULT; 479 break; 480 case V4L2_MEMORY_DMABUF: 481 if (get_user(kp->m.fd, &up->m.fd)) 482 return -EFAULT; 483 break; 484 } 485 } 486 487 return 0; 488 } 489 490 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up) 491 { 492 struct v4l2_plane32 __user *uplane32; 493 struct v4l2_plane __user *uplane; 494 compat_caddr_t p; 495 int num_planes; 496 int ret; 497 498 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) || 499 put_user(kp->index, &up->index) || 500 put_user(kp->type, &up->type) || 501 put_user(kp->flags, &up->flags) || 502 put_user(kp->memory, &up->memory)) 503 return -EFAULT; 504 505 if (put_user(kp->bytesused, &up->bytesused) || 506 put_user(kp->field, &up->field) || 507 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) || 508 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) || 509 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) || 510 put_user(kp->sequence, &up->sequence) || 511 put_user(kp->reserved2, &up->reserved2) || 512 put_user(kp->reserved, &up->reserved) || 513 put_user(kp->length, &up->length)) 514 return -EFAULT; 515 516 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) { 517 num_planes = kp->length; 518 if (num_planes == 0) 519 return 0; 520 521 uplane = (__force struct v4l2_plane __user *)kp->m.planes; 522 if (get_user(p, &up->m.planes)) 523 return -EFAULT; 524 uplane32 = compat_ptr(p); 525 526 while (--num_planes >= 0) { 527 ret = put_v4l2_plane32(uplane, uplane32, kp->memory); 528 if (ret) 529 return ret; 530 ++uplane; 531 ++uplane32; 532 } 533 } else { 534 switch (kp->memory) { 535 case V4L2_MEMORY_MMAP: 536 if (put_user(kp->m.offset, &up->m.offset)) 537 return -EFAULT; 538 break; 539 case V4L2_MEMORY_USERPTR: 540 if (put_user(kp->m.userptr, &up->m.userptr)) 541 return -EFAULT; 542 break; 543 case V4L2_MEMORY_OVERLAY: 544 if (put_user(kp->m.offset, &up->m.offset)) 545 return -EFAULT; 546 break; 547 case V4L2_MEMORY_DMABUF: 548 if (put_user(kp->m.fd, &up->m.fd)) 549 return -EFAULT; 550 break; 551 } 552 } 553 554 return 0; 555 } 556 557 struct v4l2_framebuffer32 { 558 __u32 capability; 559 __u32 flags; 560 compat_caddr_t base; 561 struct { 562 __u32 width; 563 __u32 height; 564 __u32 pixelformat; 565 __u32 field; 566 __u32 bytesperline; 567 __u32 sizeimage; 568 __u32 colorspace; 569 __u32 priv; 570 } fmt; 571 }; 572 573 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up) 574 { 575 u32 tmp; 576 577 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) || 578 get_user(tmp, &up->base) || 579 get_user(kp->capability, &up->capability) || 580 get_user(kp->flags, &up->flags) || 581 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt))) 582 return -EFAULT; 583 kp->base = (__force void *)compat_ptr(tmp); 584 return 0; 585 } 586 587 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up) 588 { 589 u32 tmp = (u32)((unsigned long)kp->base); 590 591 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) || 592 put_user(tmp, &up->base) || 593 put_user(kp->capability, &up->capability) || 594 put_user(kp->flags, &up->flags) || 595 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt))) 596 return -EFAULT; 597 return 0; 598 } 599 600 struct v4l2_input32 { 601 __u32 index; /* Which input */ 602 __u8 name[32]; /* Label */ 603 __u32 type; /* Type of input */ 604 __u32 audioset; /* Associated audios (bitfield) */ 605 __u32 tuner; /* Associated tuner */ 606 compat_u64 std; 607 __u32 status; 608 __u32 reserved[4]; 609 }; 610 611 /* The 64-bit v4l2_input struct has extra padding at the end of the struct. 612 Otherwise it is identical to the 32-bit version. */ 613 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up) 614 { 615 if (copy_from_user(kp, up, sizeof(struct v4l2_input32))) 616 return -EFAULT; 617 return 0; 618 } 619 620 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up) 621 { 622 if (copy_to_user(up, kp, sizeof(struct v4l2_input32))) 623 return -EFAULT; 624 return 0; 625 } 626 627 struct v4l2_ext_controls32 { 628 __u32 which; 629 __u32 count; 630 __u32 error_idx; 631 __u32 reserved[2]; 632 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */ 633 }; 634 635 struct v4l2_ext_control32 { 636 __u32 id; 637 __u32 size; 638 __u32 reserved2[1]; 639 union { 640 __s32 value; 641 __s64 value64; 642 compat_caddr_t string; /* actually char * */ 643 }; 644 } __attribute__ ((packed)); 645 646 /* The following function really belong in v4l2-common, but that causes 647 a circular dependency between modules. We need to think about this, but 648 for now this will do. */ 649 650 /* Return non-zero if this control is a pointer type. Currently only 651 type STRING is a pointer type. */ 652 static inline int ctrl_is_pointer(u32 id) 653 { 654 switch (id) { 655 case V4L2_CID_RDS_TX_PS_NAME: 656 case V4L2_CID_RDS_TX_RADIO_TEXT: 657 return 1; 658 default: 659 return 0; 660 } 661 } 662 663 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up) 664 { 665 struct v4l2_ext_control32 __user *ucontrols; 666 struct v4l2_ext_control __user *kcontrols; 667 int n; 668 compat_caddr_t p; 669 670 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) || 671 get_user(kp->which, &up->which) || 672 get_user(kp->count, &up->count) || 673 get_user(kp->error_idx, &up->error_idx) || 674 copy_from_user(kp->reserved, up->reserved, 675 sizeof(kp->reserved))) 676 return -EFAULT; 677 n = kp->count; 678 if (n == 0) { 679 kp->controls = NULL; 680 return 0; 681 } 682 if (get_user(p, &up->controls)) 683 return -EFAULT; 684 ucontrols = compat_ptr(p); 685 if (!access_ok(VERIFY_READ, ucontrols, 686 n * sizeof(struct v4l2_ext_control32))) 687 return -EFAULT; 688 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control)); 689 kp->controls = (__force struct v4l2_ext_control *)kcontrols; 690 while (--n >= 0) { 691 u32 id; 692 693 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols))) 694 return -EFAULT; 695 if (get_user(id, &kcontrols->id)) 696 return -EFAULT; 697 if (ctrl_is_pointer(id)) { 698 void __user *s; 699 700 if (get_user(p, &ucontrols->string)) 701 return -EFAULT; 702 s = compat_ptr(p); 703 if (put_user(s, &kcontrols->string)) 704 return -EFAULT; 705 } 706 ucontrols++; 707 kcontrols++; 708 } 709 return 0; 710 } 711 712 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up) 713 { 714 struct v4l2_ext_control32 __user *ucontrols; 715 struct v4l2_ext_control __user *kcontrols = 716 (__force struct v4l2_ext_control __user *)kp->controls; 717 int n = kp->count; 718 compat_caddr_t p; 719 720 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) || 721 put_user(kp->which, &up->which) || 722 put_user(kp->count, &up->count) || 723 put_user(kp->error_idx, &up->error_idx) || 724 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved))) 725 return -EFAULT; 726 if (!kp->count) 727 return 0; 728 729 if (get_user(p, &up->controls)) 730 return -EFAULT; 731 ucontrols = compat_ptr(p); 732 if (!access_ok(VERIFY_WRITE, ucontrols, 733 n * sizeof(struct v4l2_ext_control32))) 734 return -EFAULT; 735 736 while (--n >= 0) { 737 unsigned size = sizeof(*ucontrols); 738 u32 id; 739 740 if (get_user(id, &kcontrols->id)) 741 return -EFAULT; 742 /* Do not modify the pointer when copying a pointer control. 743 The contents of the pointer was changed, not the pointer 744 itself. */ 745 if (ctrl_is_pointer(id)) 746 size -= sizeof(ucontrols->value64); 747 if (copy_in_user(ucontrols, kcontrols, size)) 748 return -EFAULT; 749 ucontrols++; 750 kcontrols++; 751 } 752 return 0; 753 } 754 755 struct v4l2_event32 { 756 __u32 type; 757 union { 758 compat_s64 value64; 759 __u8 data[64]; 760 } u; 761 __u32 pending; 762 __u32 sequence; 763 struct compat_timespec timestamp; 764 __u32 id; 765 __u32 reserved[8]; 766 }; 767 768 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up) 769 { 770 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) || 771 put_user(kp->type, &up->type) || 772 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) || 773 put_user(kp->pending, &up->pending) || 774 put_user(kp->sequence, &up->sequence) || 775 compat_put_timespec(&kp->timestamp, &up->timestamp) || 776 put_user(kp->id, &up->id) || 777 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32))) 778 return -EFAULT; 779 return 0; 780 } 781 782 struct v4l2_edid32 { 783 __u32 pad; 784 __u32 start_block; 785 __u32 blocks; 786 __u32 reserved[5]; 787 compat_caddr_t edid; 788 }; 789 790 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up) 791 { 792 u32 tmp; 793 794 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) || 795 get_user(kp->pad, &up->pad) || 796 get_user(kp->start_block, &up->start_block) || 797 get_user(kp->blocks, &up->blocks) || 798 get_user(tmp, &up->edid) || 799 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved))) 800 return -EFAULT; 801 kp->edid = (__force u8 *)compat_ptr(tmp); 802 return 0; 803 } 804 805 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up) 806 { 807 u32 tmp = (u32)((unsigned long)kp->edid); 808 809 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) || 810 put_user(kp->pad, &up->pad) || 811 put_user(kp->start_block, &up->start_block) || 812 put_user(kp->blocks, &up->blocks) || 813 put_user(tmp, &up->edid) || 814 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved))) 815 return -EFAULT; 816 return 0; 817 } 818 819 820 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32) 821 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32) 822 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32) 823 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32) 824 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32) 825 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32) 826 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32) 827 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32) 828 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32) 829 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32) 830 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32) 831 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32) 832 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32) 833 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32) 834 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32) 835 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32) 836 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32) 837 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32) 838 839 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32) 840 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32) 841 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32) 842 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32) 843 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32) 844 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32) 845 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32) 846 847 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 848 { 849 union { 850 struct v4l2_format v2f; 851 struct v4l2_buffer v2b; 852 struct v4l2_framebuffer v2fb; 853 struct v4l2_input v2i; 854 struct v4l2_standard v2s; 855 struct v4l2_ext_controls v2ecs; 856 struct v4l2_event v2ev; 857 struct v4l2_create_buffers v2crt; 858 struct v4l2_edid v2edid; 859 unsigned long vx; 860 int vi; 861 } karg; 862 void __user *up = compat_ptr(arg); 863 int compatible_arg = 1; 864 long err = 0; 865 866 /* First, convert the command. */ 867 switch (cmd) { 868 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break; 869 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break; 870 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break; 871 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break; 872 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break; 873 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break; 874 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break; 875 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break; 876 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break; 877 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break; 878 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break; 879 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break; 880 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break; 881 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break; 882 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break; 883 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break; 884 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break; 885 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break; 886 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break; 887 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break; 888 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break; 889 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break; 890 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break; 891 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break; 892 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break; 893 } 894 895 switch (cmd) { 896 case VIDIOC_OVERLAY: 897 case VIDIOC_STREAMON: 898 case VIDIOC_STREAMOFF: 899 case VIDIOC_S_INPUT: 900 case VIDIOC_S_OUTPUT: 901 err = get_user(karg.vi, (s32 __user *)up); 902 compatible_arg = 0; 903 break; 904 905 case VIDIOC_G_INPUT: 906 case VIDIOC_G_OUTPUT: 907 compatible_arg = 0; 908 break; 909 910 case VIDIOC_G_EDID: 911 case VIDIOC_S_EDID: 912 err = get_v4l2_edid32(&karg.v2edid, up); 913 compatible_arg = 0; 914 break; 915 916 case VIDIOC_G_FMT: 917 case VIDIOC_S_FMT: 918 case VIDIOC_TRY_FMT: 919 err = get_v4l2_format32(&karg.v2f, up); 920 compatible_arg = 0; 921 break; 922 923 case VIDIOC_CREATE_BUFS: 924 err = get_v4l2_create32(&karg.v2crt, up); 925 compatible_arg = 0; 926 break; 927 928 case VIDIOC_PREPARE_BUF: 929 case VIDIOC_QUERYBUF: 930 case VIDIOC_QBUF: 931 case VIDIOC_DQBUF: 932 err = get_v4l2_buffer32(&karg.v2b, up); 933 compatible_arg = 0; 934 break; 935 936 case VIDIOC_S_FBUF: 937 err = get_v4l2_framebuffer32(&karg.v2fb, up); 938 compatible_arg = 0; 939 break; 940 941 case VIDIOC_G_FBUF: 942 compatible_arg = 0; 943 break; 944 945 case VIDIOC_ENUMSTD: 946 err = get_v4l2_standard32(&karg.v2s, up); 947 compatible_arg = 0; 948 break; 949 950 case VIDIOC_ENUMINPUT: 951 err = get_v4l2_input32(&karg.v2i, up); 952 compatible_arg = 0; 953 break; 954 955 case VIDIOC_G_EXT_CTRLS: 956 case VIDIOC_S_EXT_CTRLS: 957 case VIDIOC_TRY_EXT_CTRLS: 958 err = get_v4l2_ext_controls32(&karg.v2ecs, up); 959 compatible_arg = 0; 960 break; 961 case VIDIOC_DQEVENT: 962 compatible_arg = 0; 963 break; 964 } 965 if (err) 966 return err; 967 968 if (compatible_arg) 969 err = native_ioctl(file, cmd, (unsigned long)up); 970 else { 971 mm_segment_t old_fs = get_fs(); 972 973 set_fs(KERNEL_DS); 974 err = native_ioctl(file, cmd, (unsigned long)&karg); 975 set_fs(old_fs); 976 } 977 978 /* Special case: even after an error we need to put the 979 results back for these ioctls since the error_idx will 980 contain information on which control failed. */ 981 switch (cmd) { 982 case VIDIOC_G_EXT_CTRLS: 983 case VIDIOC_S_EXT_CTRLS: 984 case VIDIOC_TRY_EXT_CTRLS: 985 if (put_v4l2_ext_controls32(&karg.v2ecs, up)) 986 err = -EFAULT; 987 break; 988 } 989 if (err) 990 return err; 991 992 switch (cmd) { 993 case VIDIOC_S_INPUT: 994 case VIDIOC_S_OUTPUT: 995 case VIDIOC_G_INPUT: 996 case VIDIOC_G_OUTPUT: 997 err = put_user(((s32)karg.vi), (s32 __user *)up); 998 break; 999 1000 case VIDIOC_G_FBUF: 1001 err = put_v4l2_framebuffer32(&karg.v2fb, up); 1002 break; 1003 1004 case VIDIOC_DQEVENT: 1005 err = put_v4l2_event32(&karg.v2ev, up); 1006 break; 1007 1008 case VIDIOC_G_EDID: 1009 case VIDIOC_S_EDID: 1010 err = put_v4l2_edid32(&karg.v2edid, up); 1011 break; 1012 1013 case VIDIOC_G_FMT: 1014 case VIDIOC_S_FMT: 1015 case VIDIOC_TRY_FMT: 1016 err = put_v4l2_format32(&karg.v2f, up); 1017 break; 1018 1019 case VIDIOC_CREATE_BUFS: 1020 err = put_v4l2_create32(&karg.v2crt, up); 1021 break; 1022 1023 case VIDIOC_QUERYBUF: 1024 case VIDIOC_QBUF: 1025 case VIDIOC_DQBUF: 1026 err = put_v4l2_buffer32(&karg.v2b, up); 1027 break; 1028 1029 case VIDIOC_ENUMSTD: 1030 err = put_v4l2_standard32(&karg.v2s, up); 1031 break; 1032 1033 case VIDIOC_ENUMINPUT: 1034 err = put_v4l2_input32(&karg.v2i, up); 1035 break; 1036 } 1037 return err; 1038 } 1039 1040 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg) 1041 { 1042 struct video_device *vdev = video_devdata(file); 1043 long ret = -ENOIOCTLCMD; 1044 1045 if (!file->f_op->unlocked_ioctl) 1046 return ret; 1047 1048 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE) 1049 ret = do_video_ioctl(file, cmd, arg); 1050 else if (vdev->fops->compat_ioctl32) 1051 ret = vdev->fops->compat_ioctl32(file, cmd, arg); 1052 1053 if (ret == -ENOIOCTLCMD) 1054 pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n", 1055 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd); 1056 return ret; 1057 } 1058 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32); 1059