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