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