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