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 16static 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 sector_t start, length, capacity, end; 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 if (p.start < 0 || p.length <= 0 || LLONG_MAX - p.length < p.start) 37 return -EINVAL; 38 /* Check that the partition is aligned to the block size */ 39 if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev))) 40 return -EINVAL; 41 42 start = p.start >> SECTOR_SHIFT; 43 length = p.length >> SECTOR_SHIFT; 44 capacity = get_capacity(disk); 45 46 if (check_add_overflow(start, length, &end)) 47 return -EINVAL; 48 49 if (start >= capacity || end > capacity) 50 return -EINVAL; 51 52 switch (op) { 53 case BLKPG_ADD_PARTITION: 54 return bdev_add_partition(disk, p.pno, start, length); 55 case BLKPG_RESIZE_PARTITION: 56 return bdev_resize_partition(disk, p.pno, start, length); 57 default: 58 return -EINVAL; 59 } 60} 61 62static int blkpg_ioctl(struct block_device *bdev, 63 struct blkpg_ioctl_arg __user *arg) 64{ 65 struct blkpg_partition __user *udata; 66 int op; 67 68 if (get_user(op, &arg->op) || get_user(udata, &arg->data)) 69 return -EFAULT; 70 71 return blkpg_do_ioctl(bdev, udata, op); 72} 73 74#ifdef CONFIG_COMPAT 75struct compat_blkpg_ioctl_arg { 76 compat_int_t op; 77 compat_int_t flags; 78 compat_int_t datalen; 79 compat_caddr_t data; 80}; 81 82static int compat_blkpg_ioctl(struct block_device *bdev, 83 struct compat_blkpg_ioctl_arg __user *arg) 84{ 85 compat_caddr_t udata; 86 int op; 87 88 if (get_user(op, &arg->op) || get_user(udata, &arg->data)) 89 return -EFAULT; 90 91 return blkpg_do_ioctl(bdev, compat_ptr(udata), op); 92} 93#endif 94 95static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode, 96 unsigned long arg) 97{ 98 unsigned int bs_mask = bdev_logical_block_size(bdev) - 1; 99 struct inode *inode = bdev->bd_inode; 100 uint64_t range[2], start, len, end; 101 struct bio *prev = NULL, *bio; 102 sector_t sector, nr_sects; 103 struct blk_plug plug; 104 int err; 105 106 if (!(mode & BLK_OPEN_WRITE)) 107 return -EBADF; 108 109 if (!bdev_max_discard_sectors(bdev)) 110 return -EOPNOTSUPP; 111 if (bdev_read_only(bdev)) 112 return -EPERM; 113 114 if (copy_from_user(range, (void __user *)arg, sizeof(range))) 115 return -EFAULT; 116 117 start = range[0]; 118 len = range[1]; 119 120 if (!len) 121 return -EINVAL; 122 if ((start | len) & bs_mask) 123 return -EINVAL; 124 125 if (check_add_overflow(start, len, &end) || 126 end > bdev_nr_bytes(bdev)) 127 return -EINVAL; 128 129 filemap_invalidate_lock(inode->i_mapping); 130 err = truncate_bdev_range(bdev, mode, start, start + len - 1); 131 if (err) 132 goto fail; 133 134 sector = start >> SECTOR_SHIFT; 135 nr_sects = len >> SECTOR_SHIFT; 136 137 blk_start_plug(&plug); 138 while (1) { 139 if (fatal_signal_pending(current)) { 140 if (prev) 141 bio_await_chain(prev); 142 err = -EINTR; 143 goto out_unplug; 144 } 145 bio = blk_alloc_discard_bio(bdev, §or, &nr_sects, 146 GFP_KERNEL); 147 if (!bio) 148 break; 149 prev = bio_chain_and_submit(prev, bio); 150 } 151 if (prev) { 152 err = submit_bio_wait(prev); 153 if (err == -EOPNOTSUPP) 154 err = 0; 155 bio_put(prev); 156 } 157out_unplug: 158 blk_finish_plug(&plug); 159fail: 160 filemap_invalidate_unlock(inode->i_mapping); 161 return err; 162} 163 164static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, 165 void __user *argp) 166{ 167 uint64_t start, len; 168 uint64_t range[2]; 169 int err; 170 171 if (!(mode & BLK_OPEN_WRITE)) 172 return -EBADF; 173 if (!bdev_max_secure_erase_sectors(bdev)) 174 return -EOPNOTSUPP; 175 if (copy_from_user(range, argp, sizeof(range))) 176 return -EFAULT; 177 178 start = range[0]; 179 len = range[1]; 180 if ((start & 511) || (len & 511)) 181 return -EINVAL; 182 if (start + len > bdev_nr_bytes(bdev)) 183 return -EINVAL; 184 185 filemap_invalidate_lock(bdev->bd_inode->i_mapping); 186 err = truncate_bdev_range(bdev, mode, start, start + len - 1); 187 if (!err) 188 err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, 189 GFP_KERNEL); 190 filemap_invalidate_unlock(bdev->bd_inode->i_mapping); 191 return err; 192} 193 194 195static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, 196 unsigned long arg) 197{ 198 uint64_t range[2]; 199 uint64_t start, end, len; 200 struct inode *inode = bdev->bd_inode; 201 int err; 202 203 if (!(mode & BLK_OPEN_WRITE)) 204 return -EBADF; 205 206 if (copy_from_user(range, (void __user *)arg, sizeof(range))) 207 return -EFAULT; 208 209 start = range[0]; 210 len = range[1]; 211 end = start + len - 1; 212 213 if (start & 511) 214 return -EINVAL; 215 if (len & 511) 216 return -EINVAL; 217 if (end >= (uint64_t)bdev_nr_bytes(bdev)) 218 return -EINVAL; 219 if (end < start) 220 return -EINVAL; 221 222 /* Invalidate the page cache, including dirty pages */ 223 filemap_invalidate_lock(inode->i_mapping); 224 err = truncate_bdev_range(bdev, mode, start, end); 225 if (err) 226 goto fail; 227 228 err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, 229 BLKDEV_ZERO_NOUNMAP); 230 231fail: 232 filemap_invalidate_unlock(inode->i_mapping); 233 return err; 234} 235 236static int put_ushort(unsigned short __user *argp, unsigned short val) 237{ 238 return put_user(val, argp); 239} 240 241static int put_int(int __user *argp, int val) 242{ 243 return put_user(val, argp); 244} 245 246static int put_uint(unsigned int __user *argp, unsigned int val) 247{ 248 return put_user(val, argp); 249} 250 251static int put_long(long __user *argp, long val) 252{ 253 return put_user(val, argp); 254} 255 256static int put_ulong(unsigned long __user *argp, unsigned long val) 257{ 258 return put_user(val, argp); 259} 260 261static int put_u64(u64 __user *argp, u64 val) 262{ 263 return put_user(val, argp); 264} 265 266#ifdef CONFIG_COMPAT 267static int compat_put_long(compat_long_t __user *argp, long val) 268{ 269 return put_user(val, argp); 270} 271 272static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) 273{ 274 return put_user(val, argp); 275} 276#endif 277 278#ifdef CONFIG_COMPAT 279/* 280 * This is the equivalent of compat_ptr_ioctl(), to be used by block 281 * drivers that implement only commands that are completely compatible 282 * between 32-bit and 64-bit user space 283 */ 284int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, 285 unsigned cmd, unsigned long arg) 286{ 287 struct gendisk *disk = bdev->bd_disk; 288 289 if (disk->fops->ioctl) 290 return disk->fops->ioctl(bdev, mode, cmd, 291 (unsigned long)compat_ptr(arg)); 292 293 return -ENOIOCTLCMD; 294} 295EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); 296#endif 297 298static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) 299{ 300 /* no sense to make reservations for partitions */ 301 if (bdev_is_partition(bdev)) 302 return false; 303 304 if (capable(CAP_SYS_ADMIN)) 305 return true; 306 /* 307 * Only allow unprivileged reservations if the file descriptor is open 308 * for writing. 309 */ 310 return mode & BLK_OPEN_WRITE; 311} 312 313static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, 314 struct pr_registration __user *arg) 315{ 316 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; 317 struct pr_registration reg; 318 319 if (!blkdev_pr_allowed(bdev, mode)) 320 return -EPERM; 321 if (!ops || !ops->pr_register) 322 return -EOPNOTSUPP; 323 if (copy_from_user(®, arg, sizeof(reg))) 324 return -EFAULT; 325 326 if (reg.flags & ~PR_FL_IGNORE_KEY) 327 return -EOPNOTSUPP; 328 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); 329} 330 331static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, 332 struct pr_reservation __user *arg) 333{ 334 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; 335 struct pr_reservation rsv; 336 337 if (!blkdev_pr_allowed(bdev, mode)) 338 return -EPERM; 339 if (!ops || !ops->pr_reserve) 340 return -EOPNOTSUPP; 341 if (copy_from_user(&rsv, arg, sizeof(rsv))) 342 return -EFAULT; 343 344 if (rsv.flags & ~PR_FL_IGNORE_KEY) 345 return -EOPNOTSUPP; 346 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); 347} 348 349static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, 350 struct pr_reservation __user *arg) 351{ 352 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; 353 struct pr_reservation rsv; 354 355 if (!blkdev_pr_allowed(bdev, mode)) 356 return -EPERM; 357 if (!ops || !ops->pr_release) 358 return -EOPNOTSUPP; 359 if (copy_from_user(&rsv, arg, sizeof(rsv))) 360 return -EFAULT; 361 362 if (rsv.flags) 363 return -EOPNOTSUPP; 364 return ops->pr_release(bdev, rsv.key, rsv.type); 365} 366 367static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, 368 struct pr_preempt __user *arg, bool abort) 369{ 370 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; 371 struct pr_preempt p; 372 373 if (!blkdev_pr_allowed(bdev, mode)) 374 return -EPERM; 375 if (!ops || !ops->pr_preempt) 376 return -EOPNOTSUPP; 377 if (copy_from_user(&p, arg, sizeof(p))) 378 return -EFAULT; 379 380 if (p.flags) 381 return -EOPNOTSUPP; 382 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); 383} 384 385static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, 386 struct pr_clear __user *arg) 387{ 388 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; 389 struct pr_clear c; 390 391 if (!blkdev_pr_allowed(bdev, mode)) 392 return -EPERM; 393 if (!ops || !ops->pr_clear) 394 return -EOPNOTSUPP; 395 if (copy_from_user(&c, arg, sizeof(c))) 396 return -EFAULT; 397 398 if (c.flags) 399 return -EOPNOTSUPP; 400 return ops->pr_clear(bdev, c.key); 401} 402 403static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, 404 unsigned long arg) 405{ 406 if (!capable(CAP_SYS_ADMIN)) 407 return -EACCES; 408 409 mutex_lock(&bdev->bd_holder_lock); 410 if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) 411 bdev->bd_holder_ops->sync(bdev); 412 else { 413 mutex_unlock(&bdev->bd_holder_lock); 414 sync_blockdev(bdev); 415 } 416 417 invalidate_bdev(bdev); 418 return 0; 419} 420 421static int blkdev_roset(struct block_device *bdev, unsigned cmd, 422 unsigned long arg) 423{ 424 int ret, n; 425 426 if (!capable(CAP_SYS_ADMIN)) 427 return -EACCES; 428 429 if (get_user(n, (int __user *)arg)) 430 return -EFAULT; 431 if (bdev->bd_disk->fops->set_read_only) { 432 ret = bdev->bd_disk->fops->set_read_only(bdev, n); 433 if (ret) 434 return ret; 435 } 436 bdev->bd_read_only = n; 437 return 0; 438} 439 440static int blkdev_getgeo(struct block_device *bdev, 441 struct hd_geometry __user *argp) 442{ 443 struct gendisk *disk = bdev->bd_disk; 444 struct hd_geometry geo; 445 int ret; 446 447 if (!argp) 448 return -EINVAL; 449 if (!disk->fops->getgeo) 450 return -ENOTTY; 451 452 /* 453 * We need to set the startsect first, the driver may 454 * want to override it. 455 */ 456 memset(&geo, 0, sizeof(geo)); 457 geo.start = get_start_sect(bdev); 458 ret = disk->fops->getgeo(bdev, &geo); 459 if (ret) 460 return ret; 461 if (copy_to_user(argp, &geo, sizeof(geo))) 462 return -EFAULT; 463 return 0; 464} 465 466#ifdef CONFIG_COMPAT 467struct compat_hd_geometry { 468 unsigned char heads; 469 unsigned char sectors; 470 unsigned short cylinders; 471 u32 start; 472}; 473 474static int compat_hdio_getgeo(struct block_device *bdev, 475 struct compat_hd_geometry __user *ugeo) 476{ 477 struct gendisk *disk = bdev->bd_disk; 478 struct hd_geometry geo; 479 int ret; 480 481 if (!ugeo) 482 return -EINVAL; 483 if (!disk->fops->getgeo) 484 return -ENOTTY; 485 486 memset(&geo, 0, sizeof(geo)); 487 /* 488 * We need to set the startsect first, the driver may 489 * want to override it. 490 */ 491 geo.start = get_start_sect(bdev); 492 ret = disk->fops->getgeo(bdev, &geo); 493 if (ret) 494 return ret; 495 496 ret = copy_to_user(ugeo, &geo, 4); 497 ret |= put_user(geo.start, &ugeo->start); 498 if (ret) 499 ret = -EFAULT; 500 501 return ret; 502} 503#endif 504 505/* set the logical block size */ 506static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, 507 int __user *argp) 508{ 509 int ret, n; 510 struct file *file; 511 512 if (!capable(CAP_SYS_ADMIN)) 513 return -EACCES; 514 if (!argp) 515 return -EINVAL; 516 if (get_user(n, argp)) 517 return -EFAULT; 518 519 if (mode & BLK_OPEN_EXCL) 520 return set_blocksize(bdev, n); 521 522 file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); 523 if (IS_ERR(file)) 524 return -EBUSY; 525 ret = set_blocksize(bdev, n); 526 fput(file); 527 return ret; 528} 529 530/* 531 * Common commands that are handled the same way on native and compat 532 * user space. Note the separate arg/argp parameters that are needed 533 * to deal with the compat_ptr() conversion. 534 */ 535static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, 536 unsigned int cmd, unsigned long arg, 537 void __user *argp) 538{ 539 unsigned int max_sectors; 540 541 switch (cmd) { 542 case BLKFLSBUF: 543 return blkdev_flushbuf(bdev, cmd, arg); 544 case BLKROSET: 545 return blkdev_roset(bdev, cmd, arg); 546 case BLKDISCARD: 547 return blk_ioctl_discard(bdev, mode, arg); 548 case BLKSECDISCARD: 549 return blk_ioctl_secure_erase(bdev, mode, argp); 550 case BLKZEROOUT: 551 return blk_ioctl_zeroout(bdev, mode, arg); 552 case BLKGETDISKSEQ: 553 return put_u64(argp, bdev->bd_disk->diskseq); 554 case BLKREPORTZONE: 555 return blkdev_report_zones_ioctl(bdev, cmd, arg); 556 case BLKRESETZONE: 557 case BLKOPENZONE: 558 case BLKCLOSEZONE: 559 case BLKFINISHZONE: 560 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); 561 case BLKGETZONESZ: 562 return put_uint(argp, bdev_zone_sectors(bdev)); 563 case BLKGETNRZONES: 564 return put_uint(argp, bdev_nr_zones(bdev)); 565 case BLKROGET: 566 return put_int(argp, bdev_read_only(bdev) != 0); 567 case BLKSSZGET: /* get block device logical block size */ 568 return put_int(argp, bdev_logical_block_size(bdev)); 569 case BLKPBSZGET: /* get block device physical block size */ 570 return put_uint(argp, bdev_physical_block_size(bdev)); 571 case BLKIOMIN: 572 return put_uint(argp, bdev_io_min(bdev)); 573 case BLKIOOPT: 574 return put_uint(argp, bdev_io_opt(bdev)); 575 case BLKALIGNOFF: 576 return put_int(argp, bdev_alignment_offset(bdev)); 577 case BLKDISCARDZEROES: 578 return put_uint(argp, 0); 579 case BLKSECTGET: 580 max_sectors = min_t(unsigned int, USHRT_MAX, 581 queue_max_sectors(bdev_get_queue(bdev))); 582 return put_ushort(argp, max_sectors); 583 case BLKROTATIONAL: 584 return put_ushort(argp, !bdev_nonrot(bdev)); 585 case BLKRASET: 586 case BLKFRASET: 587 if(!capable(CAP_SYS_ADMIN)) 588 return -EACCES; 589 bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; 590 return 0; 591 case BLKRRPART: 592 if (!capable(CAP_SYS_ADMIN)) 593 return -EACCES; 594 if (bdev_is_partition(bdev)) 595 return -EINVAL; 596 return disk_scan_partitions(bdev->bd_disk, 597 mode | BLK_OPEN_STRICT_SCAN); 598 case BLKTRACESTART: 599 case BLKTRACESTOP: 600 case BLKTRACETEARDOWN: 601 return blk_trace_ioctl(bdev, cmd, argp); 602 case IOC_PR_REGISTER: 603 return blkdev_pr_register(bdev, mode, argp); 604 case IOC_PR_RESERVE: 605 return blkdev_pr_reserve(bdev, mode, argp); 606 case IOC_PR_RELEASE: 607 return blkdev_pr_release(bdev, mode, argp); 608 case IOC_PR_PREEMPT: 609 return blkdev_pr_preempt(bdev, mode, argp, false); 610 case IOC_PR_PREEMPT_ABORT: 611 return blkdev_pr_preempt(bdev, mode, argp, true); 612 case IOC_PR_CLEAR: 613 return blkdev_pr_clear(bdev, mode, argp); 614 default: 615 return -ENOIOCTLCMD; 616 } 617} 618 619/* 620 * Always keep this in sync with compat_blkdev_ioctl() 621 * to handle all incompatible commands in both functions. 622 * 623 * New commands must be compatible and go into blkdev_common_ioctl 624 */ 625long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) 626{ 627 struct block_device *bdev = I_BDEV(file->f_mapping->host); 628 void __user *argp = (void __user *)arg; 629 blk_mode_t mode = file_to_blk_mode(file); 630 int ret; 631 632 switch (cmd) { 633 /* These need separate implementations for the data structure */ 634 case HDIO_GETGEO: 635 return blkdev_getgeo(bdev, argp); 636 case BLKPG: 637 return 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 put_long(argp, 645 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); 646 case BLKGETSIZE: 647 if (bdev_nr_sectors(bdev) > ~0UL) 648 return -EFBIG; 649 return put_ulong(argp, bdev_nr_sectors(bdev)); 650 651 /* The data is compatible, but the command number is different */ 652 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ 653 return put_int(argp, block_size(bdev)); 654 case BLKBSZSET: 655 return blkdev_bszset(bdev, mode, argp); 656 case BLKGETSIZE64: 657 return put_u64(argp, bdev_nr_bytes(bdev)); 658 659 /* Incompatible alignment on i386 */ 660 case BLKTRACESETUP: 661 return blk_trace_ioctl(bdev, cmd, argp); 662 default: 663 break; 664 } 665 666 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); 667 if (ret != -ENOIOCTLCMD) 668 return ret; 669 670 if (!bdev->bd_disk->fops->ioctl) 671 return -ENOTTY; 672 return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); 673} 674 675#ifdef CONFIG_COMPAT 676 677#define BLKBSZGET_32 _IOR(0x12, 112, int) 678#define BLKBSZSET_32 _IOW(0x12, 113, int) 679#define BLKGETSIZE64_32 _IOR(0x12, 114, int) 680 681/* Most of the generic ioctls are handled in the normal fallback path. 682 This assumes the blkdev's low level compat_ioctl always returns 683 ENOIOCTLCMD for unknown ioctls. */ 684long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) 685{ 686 int ret; 687 void __user *argp = compat_ptr(arg); 688 struct block_device *bdev = I_BDEV(file->f_mapping->host); 689 struct gendisk *disk = bdev->bd_disk; 690 blk_mode_t mode = file_to_blk_mode(file); 691 692 switch (cmd) { 693 /* These need separate implementations for the data structure */ 694 case HDIO_GETGEO: 695 return compat_hdio_getgeo(bdev, argp); 696 case BLKPG: 697 return compat_blkpg_ioctl(bdev, argp); 698 699 /* Compat mode returns 32-bit data instead of 'long' */ 700 case BLKRAGET: 701 case BLKFRAGET: 702 if (!argp) 703 return -EINVAL; 704 return compat_put_long(argp, 705 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); 706 case BLKGETSIZE: 707 if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) 708 return -EFBIG; 709 return compat_put_ulong(argp, bdev_nr_sectors(bdev)); 710 711 /* The data is compatible, but the command number is different */ 712 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ 713 return put_int(argp, bdev_logical_block_size(bdev)); 714 case BLKBSZSET_32: 715 return blkdev_bszset(bdev, mode, argp); 716 case BLKGETSIZE64_32: 717 return put_u64(argp, bdev_nr_bytes(bdev)); 718 719 /* Incompatible alignment on i386 */ 720 case BLKTRACESETUP32: 721 return blk_trace_ioctl(bdev, cmd, argp); 722 default: 723 break; 724 } 725 726 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); 727 if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) 728 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); 729 730 return ret; 731} 732#endif 733