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