block/ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/capability.h>
   3 #include <linux/compat.h>
   4 #include <linux/blkdev.h>
   5 #include <linux/export.h>
   6 #include <linux/gfp.h>
   7 #include <linux/blkpg.h>
   8 #include <linux/hdreg.h>
   9 #include <linux/backing-dev.h>
  10 #include <linux/fs.h>
  11 #include <linux/blktrace_api.h>
  12 #include <linux/pr.h>
  13 #include <linux/uaccess.h>
  14 #include "blk.h"
  15
  16 static int blkpg_do_ioctl(struct block_device *bdev,
  17                           struct blkpg_partition __user *upart, int op)
  18 {
  19         struct blkpg_partition p;
  20         long long start, length;
  21
  22         if (!capable(CAP_SYS_ADMIN))
  23                 return -EACCES;
  24         if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
  25                 return -EFAULT;
  26         if (bdev_is_partition(bdev))
  27                 return -EINVAL;
  28
  29         if (p.pno <= 0)
  30                 return -EINVAL;
  31
  32         if (op == BLKPG_DEL_PARTITION)
  33                 return bdev_del_partition(bdev, p.pno);
  34
  35         start = p.start >> SECTOR_SHIFT;
  36         length = p.length >> SECTOR_SHIFT;
  37
  38         /* check for fit in a hd_struct */
  39         if (sizeof(sector_t) < sizeof(long long)) {
  40                 long pstart = start, plength = length;
  41
  42                 if (pstart != start || plength != length || pstart < 0 ||
  43                     plength < 0 || p.pno > 65535)
  44                         return -EINVAL;
  45         }
  46
  47         switch (op) {
  48         case BLKPG_ADD_PARTITION:
  49                 /* check if partition is aligned to blocksize */
  50                 if (p.start & (bdev_logical_block_size(bdev) - 1))
  51                         return -EINVAL;
  52                 return bdev_add_partition(bdev, p.pno, start, length);
  53         case BLKPG_RESIZE_PARTITION:
  54                 return bdev_resize_partition(bdev, p.pno, start, length);
  55         default:
  56                 return -EINVAL;
  57         }
  58 }
  59
  60 static int blkpg_ioctl(struct block_device *bdev,
  61                        struct blkpg_ioctl_arg __user *arg)
  62 {
  63         struct blkpg_partition __user *udata;
  64         int op;
  65
  66         if (get_user(op, &arg->op) || get_user(udata, &arg->data))
  67                 return -EFAULT;
  68
  69         return blkpg_do_ioctl(bdev, udata, op);
  70 }
  71
  72 #ifdef CONFIG_COMPAT
  73 struct compat_blkpg_ioctl_arg {
  74         compat_int_t op;
  75         compat_int_t flags;
  76         compat_int_t datalen;
  77         compat_caddr_t data;
  78 };
  79
  80 static int compat_blkpg_ioctl(struct block_device *bdev,
  81                               struct compat_blkpg_ioctl_arg __user *arg)
  82 {
  83         compat_caddr_t udata;
  84         int op;
  85
  86         if (get_user(op, &arg->op) || get_user(udata, &arg->data))
  87                 return -EFAULT;
  88
  89         return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
  90 }
  91 #endif
  92
  93 static int blkdev_reread_part(struct block_device *bdev)
  94 {
  95         int ret;
  96
  97         if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))
  98                 return -EINVAL;
  99         if (!capable(CAP_SYS_ADMIN))
 100                 return -EACCES;
 101
 102         mutex_lock(&bdev->bd_mutex);
 103         ret = bdev_disk_changed(bdev, false);
 104         mutex_unlock(&bdev->bd_mutex);
 105
 106         return ret;
 107 }
 108
 109 static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
 110                 unsigned long arg, unsigned long flags)
 111 {
 112         uint64_t range[2];
 113         uint64_t start, len;
 114         struct request_queue *q = bdev_get_queue(bdev);
 115         int err;
 116
 117         if (!(mode & FMODE_WRITE))
 118                 return -EBADF;
 119
 120         if (!blk_queue_discard(q))
 121                 return -EOPNOTSUPP;
 122
 123         if (copy_from_user(range, (void __user *)arg, sizeof(range)))
 124                 return -EFAULT;
 125
 126         start = range[0];
 127         len = range[1];
 128
 129         if (start & 511)
 130                 return -EINVAL;
 131         if (len & 511)
 132                 return -EINVAL;
 133
 134         if (start + len > i_size_read(bdev->bd_inode))
 135                 return -EINVAL;
 136
 137         err = truncate_bdev_range(bdev, mode, start, start + len - 1);
 138         if (err)
 139                 return err;
 140
 141         return blkdev_issue_discard(bdev, start >> 9, len >> 9,
 142                                     GFP_KERNEL, flags);
 143 }
 144
 145 static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
 146                 unsigned long arg)
 147 {
 148         uint64_t range[2];
 149         uint64_t start, end, len;
 150         int err;
 151
 152         if (!(mode & FMODE_WRITE))
 153                 return -EBADF;
 154
 155         if (copy_from_user(range, (void __user *)arg, sizeof(range)))
 156                 return -EFAULT;
 157
 158         start = range[0];
 159         len = range[1];
 160         end = start + len - 1;
 161
 162         if (start & 511)
 163                 return -EINVAL;
 164         if (len & 511)
 165                 return -EINVAL;
 166         if (end >= (uint64_t)i_size_read(bdev->bd_inode))
 167                 return -EINVAL;
 168         if (end < start)
 169                 return -EINVAL;
 170
 171         /* Invalidate the page cache, including dirty pages */
 172         err = truncate_bdev_range(bdev, mode, start, end);
 173         if (err)
 174                 return err;
 175
 176         return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
 177                         BLKDEV_ZERO_NOUNMAP);
 178 }
 179
 180 static int put_ushort(unsigned short __user *argp, unsigned short val)
 181 {
 182         return put_user(val, argp);
 183 }
 184
 185 static int put_int(int __user *argp, int val)
 186 {
 187         return put_user(val, argp);
 188 }
 189
 190 static int put_uint(unsigned int __user *argp, unsigned int val)
 191 {
 192         return put_user(val, argp);
 193 }
 194
 195 static int put_long(long __user *argp, long val)
 196 {
 197         return put_user(val, argp);
 198 }
 199
 200 static int put_ulong(unsigned long __user *argp, unsigned long val)
 201 {
 202         return put_user(val, argp);
 203 }
 204
 205 static int put_u64(u64 __user *argp, u64 val)
 206 {
 207         return put_user(val, argp);
 208 }
 209
 210 #ifdef CONFIG_COMPAT
 211 static int compat_put_long(compat_long_t __user *argp, long val)
 212 {
 213         return put_user(val, argp);
 214 }
 215
 216 static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
 217 {
 218         return put_user(val, argp);
 219 }
 220 #endif
 221
 222 int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
 223                         unsigned cmd, unsigned long arg)
 224 {
 225         struct gendisk *disk = bdev->bd_disk;
 226
 227         if (disk->fops->ioctl)
 228                 return disk->fops->ioctl(bdev, mode, cmd, arg);
 229
 230         return -ENOTTY;
 231 }
 232 /*
 233  * For the record: _GPL here is only because somebody decided to slap it
 234  * on the previous export.  Sheer idiocy, since it wasn't copyrightable
 235  * at all and could be open-coded without any exports by anybody who cares.
 236  */
 237 EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
 238
 239 #ifdef CONFIG_COMPAT
 240 /*
 241  * This is the equivalent of compat_ptr_ioctl(), to be used by block
 242  * drivers that implement only commands that are completely compatible
 243  * between 32-bit and 64-bit user space
 244  */
 245 int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
 246                         unsigned cmd, unsigned long arg)
 247 {
 248         struct gendisk *disk = bdev->bd_disk;
 249
 250         if (disk->fops->ioctl)
 251                 return disk->fops->ioctl(bdev, mode, cmd,
 252                                          (unsigned long)compat_ptr(arg));
 253
 254         return -ENOIOCTLCMD;
 255 }
 256 EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
 257 #endif
 258
 259 static int blkdev_pr_register(struct block_device *bdev,
 260                 struct pr_registration __user *arg)
 261 {
 262         const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
 263         struct pr_registration reg;
 264
 265         if (!capable(CAP_SYS_ADMIN))
 266                 return -EPERM;
 267         if (!ops || !ops->pr_register)
 268                 return -EOPNOTSUPP;
 269         if (copy_from_user(&reg, arg, sizeof(reg)))
 270                 return -EFAULT;
 271
 272         if (reg.flags & ~PR_FL_IGNORE_KEY)
 273                 return -EOPNOTSUPP;
 274         return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
 275 }
 276
 277 static int blkdev_pr_reserve(struct block_device *bdev,
 278                 struct pr_reservation __user *arg)
 279 {
 280         const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
 281         struct pr_reservation rsv;
 282
 283         if (!capable(CAP_SYS_ADMIN))
 284                 return -EPERM;
 285         if (!ops || !ops->pr_reserve)
 286                 return -EOPNOTSUPP;
 287         if (copy_from_user(&rsv, arg, sizeof(rsv)))
 288                 return -EFAULT;
 289
 290         if (rsv.flags & ~PR_FL_IGNORE_KEY)
 291                 return -EOPNOTSUPP;
 292         return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
 293 }
 294
 295 static int blkdev_pr_release(struct block_device *bdev,
 296                 struct pr_reservation __user *arg)
 297 {
 298         const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
 299         struct pr_reservation rsv;
 300
 301         if (!capable(CAP_SYS_ADMIN))
 302                 return -EPERM;
 303         if (!ops || !ops->pr_release)
 304                 return -EOPNOTSUPP;
 305         if (copy_from_user(&rsv, arg, sizeof(rsv)))
 306                 return -EFAULT;
 307
 308         if (rsv.flags)
 309                 return -EOPNOTSUPP;
 310         return ops->pr_release(bdev, rsv.key, rsv.type);
 311 }
 312
 313 static int blkdev_pr_preempt(struct block_device *bdev,
 314                 struct pr_preempt __user *arg, bool abort)
 315 {
 316         const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
 317         struct pr_preempt p;
 318
 319         if (!capable(CAP_SYS_ADMIN))
 320                 return -EPERM;
 321         if (!ops || !ops->pr_preempt)
 322                 return -EOPNOTSUPP;
 323         if (copy_from_user(&p, arg, sizeof(p)))
 324                 return -EFAULT;
 325
 326         if (p.flags)
 327                 return -EOPNOTSUPP;
 328         return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
 329 }
 330
 331 static int blkdev_pr_clear(struct block_device *bdev,
 332                 struct pr_clear __user *arg)
 333 {
 334         const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
 335         struct pr_clear c;
 336
 337         if (!capable(CAP_SYS_ADMIN))
 338                 return -EPERM;
 339         if (!ops || !ops->pr_clear)
 340                 return -EOPNOTSUPP;
 341         if (copy_from_user(&c, arg, sizeof(c)))
 342                 return -EFAULT;
 343
 344         if (c.flags)
 345                 return -EOPNOTSUPP;
 346         return ops->pr_clear(bdev, c.key);
 347 }
 348
 349 /*
 350  * Is it an unrecognized ioctl? The correct returns are either
 351  * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a
 352  * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl
 353  * code before returning.
 354  *
 355  * Confused drivers sometimes return EINVAL, which is wrong. It
 356  * means "I understood the ioctl command, but the parameters to
 357  * it were wrong".
 358  *
 359  * We should aim to just fix the broken drivers, the EINVAL case
 360  * should go away.
 361  */
 362 static inline int is_unrecognized_ioctl(int ret)
 363 {
 364         return  ret == -EINVAL ||
 365                 ret == -ENOTTY ||
 366                 ret == -ENOIOCTLCMD;
 367 }
 368
 369 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
 370                 unsigned cmd, unsigned long arg)
 371 {
 372         int ret;
 373
 374         if (!capable(CAP_SYS_ADMIN))
 375                 return -EACCES;
 376
 377         ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
 378         if (!is_unrecognized_ioctl(ret))
 379                 return ret;
 380
 381         fsync_bdev(bdev);
 382         invalidate_bdev(bdev);
 383         return 0;
 384 }
 385
 386 static int blkdev_roset(struct block_device *bdev, fmode_t mode,
 387                 unsigned cmd, unsigned long arg)
 388 {
 389         int ret, n;
 390
 391         if (!capable(CAP_SYS_ADMIN))
 392                 return -EACCES;
 393
 394         ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
 395         if (!is_unrecognized_ioctl(ret))
 396                 return ret;
 397         if (get_user(n, (int __user *)arg))
 398                 return -EFAULT;
 399         set_device_ro(bdev, n);
 400         return 0;
 401 }
 402
 403 static int blkdev_getgeo(struct block_device *bdev,
 404                 struct hd_geometry __user *argp)
 405 {
 406         struct gendisk *disk = bdev->bd_disk;
 407         struct hd_geometry geo;
 408         int ret;
 409
 410         if (!argp)
 411                 return -EINVAL;
 412         if (!disk->fops->getgeo)
 413                 return -ENOTTY;
 414
 415         /*
 416          * We need to set the startsect first, the driver may
 417          * want to override it.
 418          */
 419         memset(&geo, 0, sizeof(geo));
 420         geo.start = get_start_sect(bdev);
 421         ret = disk->fops->getgeo(bdev, &geo);
 422         if (ret)
 423                 return ret;
 424         if (copy_to_user(argp, &geo, sizeof(geo)))
 425                 return -EFAULT;
 426         return 0;
 427 }
 428
 429 #ifdef CONFIG_COMPAT
 430 struct compat_hd_geometry {
 431         unsigned char heads;
 432         unsigned char sectors;
 433         unsigned short cylinders;
 434         u32 start;
 435 };
 436
 437 static int compat_hdio_getgeo(struct block_device *bdev,
 438                               struct compat_hd_geometry __user *ugeo)
 439 {
 440         struct gendisk *disk = bdev->bd_disk;
 441         struct hd_geometry geo;
 442         int ret;
 443
 444         if (!ugeo)
 445                 return -EINVAL;
 446         if (!disk->fops->getgeo)
 447                 return -ENOTTY;
 448
 449         memset(&geo, 0, sizeof(geo));
 450         /*
 451          * We need to set the startsect first, the driver may
 452          * want to override it.
 453          */
 454         geo.start = get_start_sect(bdev);
 455         ret = disk->fops->getgeo(bdev, &geo);
 456         if (ret)
 457                 return ret;
 458
 459         ret = copy_to_user(ugeo, &geo, 4);
 460         ret |= put_user(geo.start, &ugeo->start);
 461         if (ret)
 462                 ret = -EFAULT;
 463
 464         return ret;
 465 }
 466 #endif
 467
 468 /* set the logical block size */
 469 static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
 470                 int __user *argp)
 471 {
 472         int ret, n;
 473
 474         if (!capable(CAP_SYS_ADMIN))
 475                 return -EACCES;
 476         if (!argp)
 477                 return -EINVAL;
 478         if (get_user(n, argp))
 479                 return -EFAULT;
 480
 481         if (mode & FMODE_EXCL)
 482                 return set_blocksize(bdev, n);
 483
 484         if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
 485                 return -EBUSY;
 486         ret = set_blocksize(bdev, n);
 487         blkdev_put(bdev, mode | FMODE_EXCL);
 488
 489         return ret;
 490 }
 491
 492 /*
 493  * Common commands that are handled the same way on native and compat
 494  * user space. Note the separate arg/argp parameters that are needed
 495  * to deal with the compat_ptr() conversion.
 496  */
 497 static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
 498                                 unsigned cmd, unsigned long arg, void __user *argp)
 499 {
 500         unsigned int max_sectors;
 501
 502         switch (cmd) {
 503         case BLKFLSBUF:
 504                 return blkdev_flushbuf(bdev, mode, cmd, arg);
 505         case BLKROSET:
 506                 return blkdev_roset(bdev, mode, cmd, arg);
 507         case BLKDISCARD:
 508                 return blk_ioctl_discard(bdev, mode, arg, 0);
 509         case BLKSECDISCARD:
 510                 return blk_ioctl_discard(bdev, mode, arg,
 511                                 BLKDEV_DISCARD_SECURE);
 512         case BLKZEROOUT:
 513                 return blk_ioctl_zeroout(bdev, mode, arg);
 514         case BLKREPORTZONE:
 515                 return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
 516         case BLKRESETZONE:
 517         case BLKOPENZONE:
 518         case BLKCLOSEZONE:
 519         case BLKFINISHZONE:
 520                 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
 521         case BLKGETZONESZ:
 522                 return put_uint(argp, bdev_zone_sectors(bdev));
 523         case BLKGETNRZONES:
 524                 return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
 525         case BLKROGET:
 526                 return put_int(argp, bdev_read_only(bdev) != 0);
 527         case BLKSSZGET: /* get block device logical block size */
 528                 return put_int(argp, bdev_logical_block_size(bdev));
 529         case BLKPBSZGET: /* get block device physical block size */
 530                 return put_uint(argp, bdev_physical_block_size(bdev));
 531         case BLKIOMIN:
 532                 return put_uint(argp, bdev_io_min(bdev));
 533         case BLKIOOPT:
 534                 return put_uint(argp, bdev_io_opt(bdev));
 535         case BLKALIGNOFF:
 536                 return put_int(argp, bdev_alignment_offset(bdev));
 537         case BLKDISCARDZEROES:
 538                 return put_uint(argp, 0);
 539         case BLKSECTGET:
 540                 max_sectors = min_t(unsigned int, USHRT_MAX,
 541                                     queue_max_sectors(bdev_get_queue(bdev)));
 542                 return put_ushort(argp, max_sectors);
 543         case BLKROTATIONAL:
 544                 return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
 545         case BLKRASET:
 546         case BLKFRASET:
 547                 if(!capable(CAP_SYS_ADMIN))
 548                         return -EACCES;
 549                 bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
 550                 return 0;
 551         case BLKRRPART:
 552                 return blkdev_reread_part(bdev);
 553         case BLKTRACESTART:
 554         case BLKTRACESTOP:
 555         case BLKTRACETEARDOWN:
 556                 return blk_trace_ioctl(bdev, cmd, argp);
 557         case IOC_PR_REGISTER:
 558                 return blkdev_pr_register(bdev, argp);
 559         case IOC_PR_RESERVE:
 560                 return blkdev_pr_reserve(bdev, argp);
 561         case IOC_PR_RELEASE:
 562                 return blkdev_pr_release(bdev, argp);
 563         case IOC_PR_PREEMPT:
 564                 return blkdev_pr_preempt(bdev, argp, false);
 565         case IOC_PR_PREEMPT_ABORT:
 566                 return blkdev_pr_preempt(bdev, argp, true);
 567         case IOC_PR_CLEAR:
 568                 return blkdev_pr_clear(bdev, argp);
 569         default:
 570                 return -ENOIOCTLCMD;
 571         }
 572 }
 573
 574 /*
 575  * Always keep this in sync with compat_blkdev_ioctl()
 576  * to handle all incompatible commands in both functions.
 577  *
 578  * New commands must be compatible and go into blkdev_common_ioctl
 579  */
 580 int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 581                         unsigned long arg)
 582 {
 583         int ret;
 584         loff_t size;
 585         void __user *argp = (void __user *)arg;
 586
 587         switch (cmd) {
 588         /* These need separate implementations for the data structure */
 589         case HDIO_GETGEO:
 590                 return blkdev_getgeo(bdev, argp);
 591         case BLKPG:
 592                 return blkpg_ioctl(bdev, argp);
 593
 594         /* Compat mode returns 32-bit data instead of 'long' */
 595         case BLKRAGET:
 596         case BLKFRAGET:
 597                 if (!argp)
 598                         return -EINVAL;
 599                 return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
 600         case BLKGETSIZE:
 601                 size = i_size_read(bdev->bd_inode);
 602                 if ((size >> 9) > ~0UL)
 603                         return -EFBIG;
 604                 return put_ulong(argp, size >> 9);
 605
 606         /* The data is compatible, but the command number is different */
 607         case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
 608                 return put_int(argp, block_size(bdev));
 609         case BLKBSZSET:
 610                 return blkdev_bszset(bdev, mode, argp);
 611         case BLKGETSIZE64:
 612                 return put_u64(argp, i_size_read(bdev->bd_inode));
 613
 614         /* Incompatible alignment on i386 */
 615         case BLKTRACESETUP:
 616                 return blk_trace_ioctl(bdev, cmd, argp);
 617         default:
 618                 break;
 619         }
 620
 621         ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
 622         if (ret == -ENOIOCTLCMD)
 623                 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
 624
 625         return ret;
 626 }
 627 EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */
 628
 629 #ifdef CONFIG_COMPAT
 630
 631 #define BLKBSZGET_32            _IOR(0x12, 112, int)
 632 #define BLKBSZSET_32            _IOW(0x12, 113, int)
 633 #define BLKGETSIZE64_32         _IOR(0x12, 114, int)
 634
 635 /* Most of the generic ioctls are handled in the normal fallback path.
 636    This assumes the blkdev's low level compat_ioctl always returns
 637    ENOIOCTLCMD for unknown ioctls. */
 638 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 639 {
 640         int ret;
 641         void __user *argp = compat_ptr(arg);
 642         struct inode *inode = file->f_mapping->host;
 643         struct block_device *bdev = inode->i_bdev;
 644         struct gendisk *disk = bdev->bd_disk;
 645         fmode_t mode = file->f_mode;
 646         loff_t size;
 647
 648         /*
 649          * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
 650          * to updated it before every ioctl.
 651          */
 652         if (file->f_flags & O_NDELAY)
 653                 mode |= FMODE_NDELAY;
 654         else
 655                 mode &= ~FMODE_NDELAY;
 656
 657         switch (cmd) {
 658         /* These need separate implementations for the data structure */
 659         case HDIO_GETGEO:
 660                 return compat_hdio_getgeo(bdev, argp);
 661         case BLKPG:
 662                 return compat_blkpg_ioctl(bdev, argp);
 663
 664         /* Compat mode returns 32-bit data instead of 'long' */
 665         case BLKRAGET:
 666         case BLKFRAGET:
 667                 if (!argp)
 668                         return -EINVAL;
 669                 return compat_put_long(argp,
 670                                (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
 671         case BLKGETSIZE:
 672                 size = i_size_read(bdev->bd_inode);
 673                 if ((size >> 9) > ~0UL)
 674                         return -EFBIG;
 675                 return compat_put_ulong(argp, size >> 9);
 676
 677         /* The data is compatible, but the command number is different */
 678         case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
 679                 return put_int(argp, bdev_logical_block_size(bdev));
 680         case BLKBSZSET_32:
 681                 return blkdev_bszset(bdev, mode, argp);
 682         case BLKGETSIZE64_32:
 683                 return put_u64(argp, i_size_read(bdev->bd_inode));
 684
 685         /* Incompatible alignment on i386 */
 686         case BLKTRACESETUP32:
 687                 return blk_trace_ioctl(bdev, cmd, argp);
 688         default:
 689                 break;
 690         }
 691
 692         ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
 693         if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
 694                 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
 695
 696         return ret;
 697 }
 698 #endif