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 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
62 static 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
75 struct 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
82 static 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
95 static 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 uint64_t range[2], start, len, end;
100 struct bio *prev = NULL, *bio;
101 sector_t sector, nr_sects;
102 struct blk_plug plug;
103 int err;
104
105 if (!(mode & BLK_OPEN_WRITE))
106 return -EBADF;
107
108 if (!bdev_max_discard_sectors(bdev))
109 return -EOPNOTSUPP;
110 if (bdev_read_only(bdev))
111 return -EPERM;
112
113 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
114 return -EFAULT;
115
116 start = range[0];
117 len = range[1];
118
119 if (!len)
120 return -EINVAL;
121 if ((start | len) & bs_mask)
122 return -EINVAL;
123
124 if (check_add_overflow(start, len, &end) ||
125 end > bdev_nr_bytes(bdev))
126 return -EINVAL;
127
128 filemap_invalidate_lock(bdev->bd_mapping);
129 err = truncate_bdev_range(bdev, mode, start, end - 1);
130 if (err)
131 goto fail;
132
133 sector = start >> SECTOR_SHIFT;
134 nr_sects = len >> SECTOR_SHIFT;
135
136 blk_start_plug(&plug);
137 while (1) {
138 if (fatal_signal_pending(current)) {
139 if (prev)
140 bio_await_chain(prev);
141 err = -EINTR;
142 goto out_unplug;
143 }
144 bio = blk_alloc_discard_bio(bdev, §or, &nr_sects,
145 GFP_KERNEL);
146 if (!bio)
147 break;
148 prev = bio_chain_and_submit(prev, bio);
149 }
150 if (prev) {
151 err = submit_bio_wait(prev);
152 if (err == -EOPNOTSUPP)
153 err = 0;
154 bio_put(prev);
155 }
156 out_unplug:
157 blk_finish_plug(&plug);
158 fail:
159 filemap_invalidate_unlock(bdev->bd_mapping);
160 return err;
161 }
162
163 static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
164 void __user *argp)
165 {
166 uint64_t start, len, end;
167 uint64_t range[2];
168 int err;
169
170 if (!(mode & BLK_OPEN_WRITE))
171 return -EBADF;
172 if (!bdev_max_secure_erase_sectors(bdev))
173 return -EOPNOTSUPP;
174 if (copy_from_user(range, argp, sizeof(range)))
175 return -EFAULT;
176
177 start = range[0];
178 len = range[1];
179 if ((start & 511) || (len & 511))
180 return -EINVAL;
181 if (check_add_overflow(start, len, &end) ||
182 end > bdev_nr_bytes(bdev))
183 return -EINVAL;
184
185 filemap_invalidate_lock(bdev->bd_mapping);
186 err = truncate_bdev_range(bdev, mode, start, end - 1);
187 if (!err)
188 err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9,
189 GFP_KERNEL);
190 filemap_invalidate_unlock(bdev->bd_mapping);
191 return err;
192 }
193
194
195 static 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 int err;
201
202 if (!(mode & BLK_OPEN_WRITE))
203 return -EBADF;
204
205 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
206 return -EFAULT;
207
208 start = range[0];
209 len = range[1];
210 end = start + len - 1;
211
212 if (start & 511)
213 return -EINVAL;
214 if (len & 511)
215 return -EINVAL;
216 if (end >= (uint64_t)bdev_nr_bytes(bdev))
217 return -EINVAL;
218 if (end < start)
219 return -EINVAL;
220
221 /* Invalidate the page cache, including dirty pages */
222 filemap_invalidate_lock(bdev->bd_mapping);
223 err = truncate_bdev_range(bdev, mode, start, end);
224 if (err)
225 goto fail;
226
227 err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
228 BLKDEV_ZERO_NOUNMAP | BLKDEV_ZERO_KILLABLE);
229
230 fail:
231 filemap_invalidate_unlock(bdev->bd_mapping);
232 return err;
233 }
234
235 static int put_ushort(unsigned short __user *argp, unsigned short val)
236 {
237 return put_user(val, argp);
238 }
239
240 static int put_int(int __user *argp, int val)
241 {
242 return put_user(val, argp);
243 }
244
245 static int put_uint(unsigned int __user *argp, unsigned int val)
246 {
247 return put_user(val, argp);
248 }
249
250 static int put_long(long __user *argp, long val)
251 {
252 return put_user(val, argp);
253 }
254
255 static int put_ulong(unsigned long __user *argp, unsigned long val)
256 {
257 return put_user(val, argp);
258 }
259
260 static int put_u64(u64 __user *argp, u64 val)
261 {
262 return put_user(val, argp);
263 }
264
265 #ifdef CONFIG_COMPAT
266 static int compat_put_long(compat_long_t __user *argp, long val)
267 {
268 return put_user(val, argp);
269 }
270
271 static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
272 {
273 return put_user(val, argp);
274 }
275 #endif
276
277 #ifdef CONFIG_COMPAT
278 /*
279 * This is the equivalent of compat_ptr_ioctl(), to be used by block
280 * drivers that implement only commands that are completely compatible
281 * between 32-bit and 64-bit user space
282 */
283 int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode,
284 unsigned cmd, unsigned long arg)
285 {
286 struct gendisk *disk = bdev->bd_disk;
287
288 if (disk->fops->ioctl)
289 return disk->fops->ioctl(bdev, mode, cmd,
290 (unsigned long)compat_ptr(arg));
291
292 return -ENOIOCTLCMD;
293 }
294 EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
295 #endif
296
297 static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode)
298 {
299 /* no sense to make reservations for partitions */
300 if (bdev_is_partition(bdev))
301 return false;
302
303 if (capable(CAP_SYS_ADMIN))
304 return true;
305 /*
306 * Only allow unprivileged reservations if the file descriptor is open
307 * for writing.
308 */
309 return mode & BLK_OPEN_WRITE;
310 }
311
312 static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode,
313 struct pr_registration __user *arg)
314 {
315 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
316 struct pr_registration reg;
317
318 if (!blkdev_pr_allowed(bdev, mode))
319 return -EPERM;
320 if (!ops || !ops->pr_register)
321 return -EOPNOTSUPP;
322 if (copy_from_user(®, arg, sizeof(reg)))
323 return -EFAULT;
324
325 if (reg.flags & ~PR_FL_IGNORE_KEY)
326 return -EOPNOTSUPP;
327 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
328 }
329
330 static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode,
331 struct pr_reservation __user *arg)
332 {
333 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
334 struct pr_reservation rsv;
335
336 if (!blkdev_pr_allowed(bdev, mode))
337 return -EPERM;
338 if (!ops || !ops->pr_reserve)
339 return -EOPNOTSUPP;
340 if (copy_from_user(&rsv, arg, sizeof(rsv)))
341 return -EFAULT;
342
343 if (rsv.flags & ~PR_FL_IGNORE_KEY)
344 return -EOPNOTSUPP;
345 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
346 }
347
348 static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode,
349 struct pr_reservation __user *arg)
350 {
351 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
352 struct pr_reservation rsv;
353
354 if (!blkdev_pr_allowed(bdev, mode))
355 return -EPERM;
356 if (!ops || !ops->pr_release)
357 return -EOPNOTSUPP;
358 if (copy_from_user(&rsv, arg, sizeof(rsv)))
359 return -EFAULT;
360
361 if (rsv.flags)
362 return -EOPNOTSUPP;
363 return ops->pr_release(bdev, rsv.key, rsv.type);
364 }
365
366 static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode,
367 struct pr_preempt __user *arg, bool abort)
368 {
369 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
370 struct pr_preempt p;
371
372 if (!blkdev_pr_allowed(bdev, mode))
373 return -EPERM;
374 if (!ops || !ops->pr_preempt)
375 return -EOPNOTSUPP;
376 if (copy_from_user(&p, arg, sizeof(p)))
377 return -EFAULT;
378
379 if (p.flags)
380 return -EOPNOTSUPP;
381 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
382 }
383
384 static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode,
385 struct pr_clear __user *arg)
386 {
387 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
388 struct pr_clear c;
389
390 if (!blkdev_pr_allowed(bdev, mode))
391 return -EPERM;
392 if (!ops || !ops->pr_clear)
393 return -EOPNOTSUPP;
394 if (copy_from_user(&c, arg, sizeof(c)))
395 return -EFAULT;
396
397 if (c.flags)
398 return -EOPNOTSUPP;
399 return ops->pr_clear(bdev, c.key);
400 }
401
402 static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd,
403 unsigned long arg)
404 {
405 if (!capable(CAP_SYS_ADMIN))
406 return -EACCES;
407
408 mutex_lock(&bdev->bd_holder_lock);
409 if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync)
410 bdev->bd_holder_ops->sync(bdev);
411 else {
412 mutex_unlock(&bdev->bd_holder_lock);
413 sync_blockdev(bdev);
414 }
415
416 invalidate_bdev(bdev);
417 return 0;
418 }
419
420 static int blkdev_roset(struct block_device *bdev, unsigned cmd,
421 unsigned long arg)
422 {
423 int ret, n;
424
425 if (!capable(CAP_SYS_ADMIN))
426 return -EACCES;
427
428 if (get_user(n, (int __user *)arg))
429 return -EFAULT;
430 if (bdev->bd_disk->fops->set_read_only) {
431 ret = bdev->bd_disk->fops->set_read_only(bdev, n);
432 if (ret)
433 return ret;
434 }
435 if (n)
436 bdev_set_flag(bdev, BD_READ_ONLY);
437 else
438 bdev_clear_flag(bdev, BD_READ_ONLY);
439 return 0;
440 }
441
442 static int blkdev_getgeo(struct block_device *bdev,
443 struct hd_geometry __user *argp)
444 {
445 struct gendisk *disk = bdev->bd_disk;
446 struct hd_geometry geo;
447 int ret;
448
449 if (!argp)
450 return -EINVAL;
451 if (!disk->fops->getgeo)
452 return -ENOTTY;
453
454 /*
455 * We need to set the startsect first, the driver may
456 * want to override it.
457 */
458 memset(&geo, 0, sizeof(geo));
459 geo.start = get_start_sect(bdev);
460 ret = disk->fops->getgeo(bdev, &geo);
461 if (ret)
462 return ret;
463 if (copy_to_user(argp, &geo, sizeof(geo)))
464 return -EFAULT;
465 return 0;
466 }
467
468 #ifdef CONFIG_COMPAT
469 struct compat_hd_geometry {
470 unsigned char heads;
471 unsigned char sectors;
472 unsigned short cylinders;
473 u32 start;
474 };
475
476 static int compat_hdio_getgeo(struct block_device *bdev,
477 struct compat_hd_geometry __user *ugeo)
478 {
479 struct gendisk *disk = bdev->bd_disk;
480 struct hd_geometry geo;
481 int ret;
482
483 if (!ugeo)
484 return -EINVAL;
485 if (!disk->fops->getgeo)
486 return -ENOTTY;
487
488 memset(&geo, 0, sizeof(geo));
489 /*
490 * We need to set the startsect first, the driver may
491 * want to override it.
492 */
493 geo.start = get_start_sect(bdev);
494 ret = disk->fops->getgeo(bdev, &geo);
495 if (ret)
496 return ret;
497
498 ret = copy_to_user(ugeo, &geo, 4);
499 ret |= put_user(geo.start, &ugeo->start);
500 if (ret)
501 ret = -EFAULT;
502
503 return ret;
504 }
505 #endif
506
507 /* set the logical block size */
508 static int blkdev_bszset(struct file *file, blk_mode_t mode,
509 int __user *argp)
510 {
511 // this one might be file_inode(file)->i_rdev - a rare valid
512 // use of file_inode() for those.
513 dev_t dev = I_BDEV(file->f_mapping->host)->bd_dev;
514 struct file *excl_file;
515 int ret, n;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -EACCES;
519 if (!argp)
520 return -EINVAL;
521 if (get_user(n, argp))
522 return -EFAULT;
523
524 if (mode & BLK_OPEN_EXCL)
525 return set_blocksize(file, n);
526
527 excl_file = bdev_file_open_by_dev(dev, mode, &dev, NULL);
528 if (IS_ERR(excl_file))
529 return -EBUSY;
530 ret = set_blocksize(excl_file, n);
531 fput(excl_file);
532 return ret;
533 }
534
535 /*
536 * Common commands that are handled the same way on native and compat
537 * user space. Note the separate arg/argp parameters that are needed
538 * to deal with the compat_ptr() conversion.
539 */
540 static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
541 unsigned int cmd, unsigned long arg,
542 void __user *argp)
543 {
544 unsigned int max_sectors;
545
546 switch (cmd) {
547 case BLKFLSBUF:
548 return blkdev_flushbuf(bdev, cmd, arg);
549 case BLKROSET:
550 return blkdev_roset(bdev, cmd, arg);
551 case BLKDISCARD:
552 return blk_ioctl_discard(bdev, mode, arg);
553 case BLKSECDISCARD:
554 return blk_ioctl_secure_erase(bdev, mode, argp);
555 case BLKZEROOUT:
556 return blk_ioctl_zeroout(bdev, mode, arg);
557 case BLKGETDISKSEQ:
558 return put_u64(argp, bdev->bd_disk->diskseq);
559 case BLKREPORTZONE:
560 return blkdev_report_zones_ioctl(bdev, cmd, arg);
561 case BLKRESETZONE:
562 case BLKOPENZONE:
563 case BLKCLOSEZONE:
564 case BLKFINISHZONE:
565 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
566 case BLKGETZONESZ:
567 return put_uint(argp, bdev_zone_sectors(bdev));
568 case BLKGETNRZONES:
569 return put_uint(argp, bdev_nr_zones(bdev));
570 case BLKROGET:
571 return put_int(argp, bdev_read_only(bdev) != 0);
572 case BLKSSZGET: /* get block device logical block size */
573 return put_int(argp, bdev_logical_block_size(bdev));
574 case BLKPBSZGET: /* get block device physical block size */
575 return put_uint(argp, bdev_physical_block_size(bdev));
576 case BLKIOMIN:
577 return put_uint(argp, bdev_io_min(bdev));
578 case BLKIOOPT:
579 return put_uint(argp, bdev_io_opt(bdev));
580 case BLKALIGNOFF:
581 return put_int(argp, bdev_alignment_offset(bdev));
582 case BLKDISCARDZEROES:
583 return put_uint(argp, 0);
584 case BLKSECTGET:
585 max_sectors = min_t(unsigned int, USHRT_MAX,
586 queue_max_sectors(bdev_get_queue(bdev)));
587 return put_ushort(argp, max_sectors);
588 case BLKROTATIONAL:
589 return put_ushort(argp, !bdev_nonrot(bdev));
590 case BLKRASET:
591 case BLKFRASET:
592 if(!capable(CAP_SYS_ADMIN))
593 return -EACCES;
594 bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
595 return 0;
596 case BLKRRPART:
597 if (!capable(CAP_SYS_ADMIN))
598 return -EACCES;
599 if (bdev_is_partition(bdev))
600 return -EINVAL;
601 return disk_scan_partitions(bdev->bd_disk,
602 mode | BLK_OPEN_STRICT_SCAN);
603 case BLKTRACESTART:
604 case BLKTRACESTOP:
605 case BLKTRACETEARDOWN:
606 return blk_trace_ioctl(bdev, cmd, argp);
607 case IOC_PR_REGISTER:
608 return blkdev_pr_register(bdev, mode, argp);
609 case IOC_PR_RESERVE:
610 return blkdev_pr_reserve(bdev, mode, argp);
611 case IOC_PR_RELEASE:
612 return blkdev_pr_release(bdev, mode, argp);
613 case IOC_PR_PREEMPT:
614 return blkdev_pr_preempt(bdev, mode, argp, false);
615 case IOC_PR_PREEMPT_ABORT:
616 return blkdev_pr_preempt(bdev, mode, argp, true);
617 case IOC_PR_CLEAR:
618 return blkdev_pr_clear(bdev, mode, argp);
619 default:
620 return -ENOIOCTLCMD;
621 }
622 }
623
624 /*
625 * Always keep this in sync with compat_blkdev_ioctl()
626 * to handle all incompatible commands in both functions.
627 *
628 * New commands must be compatible and go into blkdev_common_ioctl
629 */
630 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
631 {
632 struct block_device *bdev = I_BDEV(file->f_mapping->host);
633 void __user *argp = (void __user *)arg;
634 blk_mode_t mode = file_to_blk_mode(file);
635 int ret;
636
637 switch (cmd) {
638 /* These need separate implementations for the data structure */
639 case HDIO_GETGEO:
640 return blkdev_getgeo(bdev, argp);
641 case BLKPG:
642 return blkpg_ioctl(bdev, argp);
643
644 /* Compat mode returns 32-bit data instead of 'long' */
645 case BLKRAGET:
646 case BLKFRAGET:
647 if (!argp)
648 return -EINVAL;
649 return put_long(argp,
650 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
651 case BLKGETSIZE:
652 if (bdev_nr_sectors(bdev) > ~0UL)
653 return -EFBIG;
654 return put_ulong(argp, bdev_nr_sectors(bdev));
655
656 /* The data is compatible, but the command number is different */
657 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
658 return put_int(argp, block_size(bdev));
659 case BLKBSZSET:
660 return blkdev_bszset(file, mode, argp);
661 case BLKGETSIZE64:
662 return put_u64(argp, bdev_nr_bytes(bdev));
663
664 /* Incompatible alignment on i386 */
665 case BLKTRACESETUP:
666 return blk_trace_ioctl(bdev, cmd, argp);
667 default:
668 break;
669 }
670
671 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
672 if (ret != -ENOIOCTLCMD)
673 return ret;
674
675 if (!bdev->bd_disk->fops->ioctl)
676 return -ENOTTY;
677 return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
678 }
679
680 #ifdef CONFIG_COMPAT
681
682 #define BLKBSZGET_32 _IOR(0x12, 112, int)
683 #define BLKBSZSET_32 _IOW(0x12, 113, int)
684 #define BLKGETSIZE64_32 _IOR(0x12, 114, int)
685
686 /* Most of the generic ioctls are handled in the normal fallback path.
687 This assumes the blkdev's low level compat_ioctl always returns
688 ENOIOCTLCMD for unknown ioctls. */
689 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
690 {
691 int ret;
692 void __user *argp = compat_ptr(arg);
693 struct block_device *bdev = I_BDEV(file->f_mapping->host);
694 struct gendisk *disk = bdev->bd_disk;
695 blk_mode_t mode = file_to_blk_mode(file);
696
697 switch (cmd) {
698 /* These need separate implementations for the data structure */
699 case HDIO_GETGEO:
700 return compat_hdio_getgeo(bdev, argp);
701 case BLKPG:
702 return compat_blkpg_ioctl(bdev, argp);
703
704 /* Compat mode returns 32-bit data instead of 'long' */
705 case BLKRAGET:
706 case BLKFRAGET:
707 if (!argp)
708 return -EINVAL;
709 return compat_put_long(argp,
710 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
711 case BLKGETSIZE:
712 if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0)
713 return -EFBIG;
714 return compat_put_ulong(argp, bdev_nr_sectors(bdev));
715
716 /* The data is compatible, but the command number is different */
717 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
718 return put_int(argp, bdev_logical_block_size(bdev));
719 case BLKBSZSET_32:
720 return blkdev_bszset(file, mode, argp);
721 case BLKGETSIZE64_32:
722 return put_u64(argp, bdev_nr_bytes(bdev));
723
724 /* Incompatible alignment on i386 */
725 case BLKTRACESETUP32:
726 return blk_trace_ioctl(bdev, cmd, argp);
727 default:
728 break;
729 }
730
731 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
732 if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
733 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
734
735 return ret;
736 }
737 #endif
738
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