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 blkpg_partition p;
20 long long start, length;
21
22 if (!capable(CAP_SYS_ADMIN))
23 return -EACCES;
24 if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
25 return -EFAULT;
26 if (bdev_is_partition(bdev))
27 return -EINVAL;
28
29 if (p.pno <= 0)
30 return -EINVAL;
31
32 if (op == BLKPG_DEL_PARTITION)
33 return bdev_del_partition(bdev, p.pno);
34
35 start = p.start >> SECTOR_SHIFT;
36 length = p.length >> SECTOR_SHIFT;
37
38 switch (op) {
39 case BLKPG_ADD_PARTITION:
40 /* check if partition is aligned to blocksize */
41 if (p.start & (bdev_logical_block_size(bdev) - 1))
42 return -EINVAL;
43 return bdev_add_partition(bdev, p.pno, start, length);
44 case BLKPG_RESIZE_PARTITION:
45 return bdev_resize_partition(bdev, p.pno, start, length);
46 default:
47 return -EINVAL;
48 }
49 }
50
blkpg_ioctl(struct block_device * bdev,struct blkpg_ioctl_arg __user * arg)51 static int blkpg_ioctl(struct block_device *bdev,
52 struct blkpg_ioctl_arg __user *arg)
53 {
54 struct blkpg_partition __user *udata;
55 int op;
56
57 if (get_user(op, &arg->op) || get_user(udata, &arg->data))
58 return -EFAULT;
59
60 return blkpg_do_ioctl(bdev, udata, op);
61 }
62
63 #ifdef CONFIG_COMPAT
64 struct compat_blkpg_ioctl_arg {
65 compat_int_t op;
66 compat_int_t flags;
67 compat_int_t datalen;
68 compat_caddr_t data;
69 };
70
compat_blkpg_ioctl(struct block_device * bdev,struct compat_blkpg_ioctl_arg __user * arg)71 static int compat_blkpg_ioctl(struct block_device *bdev,
72 struct compat_blkpg_ioctl_arg __user *arg)
73 {
74 compat_caddr_t udata;
75 int op;
76
77 if (get_user(op, &arg->op) || get_user(udata, &arg->data))
78 return -EFAULT;
79
80 return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
81 }
82 #endif
83
blkdev_reread_part(struct block_device * bdev,fmode_t mode)84 static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
85 {
86 struct block_device *tmp;
87
88 if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))
89 return -EINVAL;
90 if (!capable(CAP_SYS_ADMIN))
91 return -EACCES;
92 if (bdev->bd_part_count)
93 return -EBUSY;
94
95 /*
96 * Reopen the device to revalidate the driver state and force a
97 * partition rescan.
98 */
99 mode &= ~FMODE_EXCL;
100 set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
101
102 tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);
103 if (IS_ERR(tmp))
104 return PTR_ERR(tmp);
105 blkdev_put(tmp, mode);
106 return 0;
107 }
108
blk_ioctl_discard(struct block_device * bdev,fmode_t mode,unsigned long arg,unsigned long flags)109 static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
110 unsigned long arg, unsigned long flags)
111 {
112 uint64_t range[2];
113 uint64_t start, len;
114 struct request_queue *q = bdev_get_queue(bdev);
115 int err;
116
117 if (!(mode & FMODE_WRITE))
118 return -EBADF;
119
120 if (!blk_queue_discard(q))
121 return -EOPNOTSUPP;
122
123 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
124 return -EFAULT;
125
126 start = range[0];
127 len = range[1];
128
129 if (start & 511)
130 return -EINVAL;
131 if (len & 511)
132 return -EINVAL;
133
134 if (start + len > i_size_read(bdev->bd_inode))
135 return -EINVAL;
136
137 err = truncate_bdev_range(bdev, mode, start, start + len - 1);
138 if (err)
139 return err;
140
141 return blkdev_issue_discard(bdev, start >> 9, len >> 9,
142 GFP_KERNEL, flags);
143 }
144
blk_ioctl_zeroout(struct block_device * bdev,fmode_t mode,unsigned long arg)145 static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
146 unsigned long arg)
147 {
148 uint64_t range[2];
149 uint64_t start, end, len;
150 int err;
151
152 if (!(mode & FMODE_WRITE))
153 return -EBADF;
154
155 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
156 return -EFAULT;
157
158 start = range[0];
159 len = range[1];
160 end = start + len - 1;
161
162 if (start & 511)
163 return -EINVAL;
164 if (len & 511)
165 return -EINVAL;
166 if (end >= (uint64_t)i_size_read(bdev->bd_inode))
167 return -EINVAL;
168 if (end < start)
169 return -EINVAL;
170
171 /* Invalidate the page cache, including dirty pages */
172 err = truncate_bdev_range(bdev, mode, start, end);
173 if (err)
174 return err;
175
176 return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
177 BLKDEV_ZERO_NOUNMAP);
178 }
179
put_ushort(unsigned short __user * argp,unsigned short val)180 static int put_ushort(unsigned short __user *argp, unsigned short val)
181 {
182 return put_user(val, argp);
183 }
184
put_int(int __user * argp,int val)185 static int put_int(int __user *argp, int val)
186 {
187 return put_user(val, argp);
188 }
189
put_uint(unsigned int __user * argp,unsigned int val)190 static int put_uint(unsigned int __user *argp, unsigned int val)
191 {
192 return put_user(val, argp);
193 }
194
put_long(long __user * argp,long val)195 static int put_long(long __user *argp, long val)
196 {
197 return put_user(val, argp);
198 }
199
put_ulong(unsigned long __user * argp,unsigned long val)200 static int put_ulong(unsigned long __user *argp, unsigned long val)
201 {
202 return put_user(val, argp);
203 }
204
put_u64(u64 __user * argp,u64 val)205 static int put_u64(u64 __user *argp, u64 val)
206 {
207 return put_user(val, argp);
208 }
209
210 #ifdef CONFIG_COMPAT
compat_put_long(compat_long_t __user * argp,long val)211 static int compat_put_long(compat_long_t __user *argp, long val)
212 {
213 return put_user(val, argp);
214 }
215
compat_put_ulong(compat_ulong_t __user * argp,compat_ulong_t val)216 static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
217 {
218 return put_user(val, argp);
219 }
220 #endif
221
222 #ifdef CONFIG_COMPAT
223 /*
224 * This is the equivalent of compat_ptr_ioctl(), to be used by block
225 * drivers that implement only commands that are completely compatible
226 * between 32-bit and 64-bit user space
227 */
blkdev_compat_ptr_ioctl(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)228 int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
229 unsigned cmd, unsigned long arg)
230 {
231 struct gendisk *disk = bdev->bd_disk;
232
233 if (disk->fops->ioctl)
234 return disk->fops->ioctl(bdev, mode, cmd,
235 (unsigned long)compat_ptr(arg));
236
237 return -ENOIOCTLCMD;
238 }
239 EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
240 #endif
241
blkdev_pr_register(struct block_device * bdev,struct pr_registration __user * arg)242 static int blkdev_pr_register(struct block_device *bdev,
243 struct pr_registration __user *arg)
244 {
245 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
246 struct pr_registration reg;
247
248 if (!capable(CAP_SYS_ADMIN))
249 return -EPERM;
250 if (!ops || !ops->pr_register)
251 return -EOPNOTSUPP;
252 if (copy_from_user(®, arg, sizeof(reg)))
253 return -EFAULT;
254
255 if (reg.flags & ~PR_FL_IGNORE_KEY)
256 return -EOPNOTSUPP;
257 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
258 }
259
blkdev_pr_reserve(struct block_device * bdev,struct pr_reservation __user * arg)260 static int blkdev_pr_reserve(struct block_device *bdev,
261 struct pr_reservation __user *arg)
262 {
263 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
264 struct pr_reservation rsv;
265
266 if (!capable(CAP_SYS_ADMIN))
267 return -EPERM;
268 if (!ops || !ops->pr_reserve)
269 return -EOPNOTSUPP;
270 if (copy_from_user(&rsv, arg, sizeof(rsv)))
271 return -EFAULT;
272
273 if (rsv.flags & ~PR_FL_IGNORE_KEY)
274 return -EOPNOTSUPP;
275 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
276 }
277
blkdev_pr_release(struct block_device * bdev,struct pr_reservation __user * arg)278 static int blkdev_pr_release(struct block_device *bdev,
279 struct pr_reservation __user *arg)
280 {
281 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
282 struct pr_reservation rsv;
283
284 if (!capable(CAP_SYS_ADMIN))
285 return -EPERM;
286 if (!ops || !ops->pr_release)
287 return -EOPNOTSUPP;
288 if (copy_from_user(&rsv, arg, sizeof(rsv)))
289 return -EFAULT;
290
291 if (rsv.flags)
292 return -EOPNOTSUPP;
293 return ops->pr_release(bdev, rsv.key, rsv.type);
294 }
295
blkdev_pr_preempt(struct block_device * bdev,struct pr_preempt __user * arg,bool abort)296 static int blkdev_pr_preempt(struct block_device *bdev,
297 struct pr_preempt __user *arg, bool abort)
298 {
299 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
300 struct pr_preempt p;
301
302 if (!capable(CAP_SYS_ADMIN))
303 return -EPERM;
304 if (!ops || !ops->pr_preempt)
305 return -EOPNOTSUPP;
306 if (copy_from_user(&p, arg, sizeof(p)))
307 return -EFAULT;
308
309 if (p.flags)
310 return -EOPNOTSUPP;
311 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
312 }
313
blkdev_pr_clear(struct block_device * bdev,struct pr_clear __user * arg)314 static int blkdev_pr_clear(struct block_device *bdev,
315 struct pr_clear __user *arg)
316 {
317 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
318 struct pr_clear c;
319
320 if (!capable(CAP_SYS_ADMIN))
321 return -EPERM;
322 if (!ops || !ops->pr_clear)
323 return -EOPNOTSUPP;
324 if (copy_from_user(&c, arg, sizeof(c)))
325 return -EFAULT;
326
327 if (c.flags)
328 return -EOPNOTSUPP;
329 return ops->pr_clear(bdev, c.key);
330 }
331
blkdev_flushbuf(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)332 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
333 unsigned cmd, unsigned long arg)
334 {
335 if (!capable(CAP_SYS_ADMIN))
336 return -EACCES;
337 fsync_bdev(bdev);
338 invalidate_bdev(bdev);
339 return 0;
340 }
341
blkdev_roset(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)342 static int blkdev_roset(struct block_device *bdev, fmode_t mode,
343 unsigned cmd, unsigned long arg)
344 {
345 int ret, n;
346
347 if (!capable(CAP_SYS_ADMIN))
348 return -EACCES;
349
350 if (get_user(n, (int __user *)arg))
351 return -EFAULT;
352 if (bdev->bd_disk->fops->set_read_only) {
353 ret = bdev->bd_disk->fops->set_read_only(bdev, n);
354 if (ret)
355 return ret;
356 }
357 bdev->bd_read_only = n;
358 return 0;
359 }
360
blkdev_getgeo(struct block_device * bdev,struct hd_geometry __user * argp)361 static int blkdev_getgeo(struct block_device *bdev,
362 struct hd_geometry __user *argp)
363 {
364 struct gendisk *disk = bdev->bd_disk;
365 struct hd_geometry geo;
366 int ret;
367
368 if (!argp)
369 return -EINVAL;
370 if (!disk->fops->getgeo)
371 return -ENOTTY;
372
373 /*
374 * We need to set the startsect first, the driver may
375 * want to override it.
376 */
377 memset(&geo, 0, sizeof(geo));
378 geo.start = get_start_sect(bdev);
379 ret = disk->fops->getgeo(bdev, &geo);
380 if (ret)
381 return ret;
382 if (copy_to_user(argp, &geo, sizeof(geo)))
383 return -EFAULT;
384 return 0;
385 }
386
387 #ifdef CONFIG_COMPAT
388 struct compat_hd_geometry {
389 unsigned char heads;
390 unsigned char sectors;
391 unsigned short cylinders;
392 u32 start;
393 };
394
compat_hdio_getgeo(struct block_device * bdev,struct compat_hd_geometry __user * ugeo)395 static int compat_hdio_getgeo(struct block_device *bdev,
396 struct compat_hd_geometry __user *ugeo)
397 {
398 struct gendisk *disk = bdev->bd_disk;
399 struct hd_geometry geo;
400 int ret;
401
402 if (!ugeo)
403 return -EINVAL;
404 if (!disk->fops->getgeo)
405 return -ENOTTY;
406
407 memset(&geo, 0, sizeof(geo));
408 /*
409 * We need to set the startsect first, the driver may
410 * want to override it.
411 */
412 geo.start = get_start_sect(bdev);
413 ret = disk->fops->getgeo(bdev, &geo);
414 if (ret)
415 return ret;
416
417 ret = copy_to_user(ugeo, &geo, 4);
418 ret |= put_user(geo.start, &ugeo->start);
419 if (ret)
420 ret = -EFAULT;
421
422 return ret;
423 }
424 #endif
425
426 /* set the logical block size */
blkdev_bszset(struct block_device * bdev,fmode_t mode,int __user * argp)427 static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
428 int __user *argp)
429 {
430 int ret, n;
431
432 if (!capable(CAP_SYS_ADMIN))
433 return -EACCES;
434 if (!argp)
435 return -EINVAL;
436 if (get_user(n, argp))
437 return -EFAULT;
438
439 if (mode & FMODE_EXCL)
440 return set_blocksize(bdev, n);
441
442 if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
443 return -EBUSY;
444 ret = set_blocksize(bdev, n);
445 blkdev_put(bdev, mode | FMODE_EXCL);
446
447 return ret;
448 }
449
450 /*
451 * Common commands that are handled the same way on native and compat
452 * user space. Note the separate arg/argp parameters that are needed
453 * to deal with the compat_ptr() conversion.
454 */
blkdev_common_ioctl(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg,void __user * argp)455 static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
456 unsigned cmd, unsigned long arg, void __user *argp)
457 {
458 unsigned int max_sectors;
459
460 switch (cmd) {
461 case BLKFLSBUF:
462 return blkdev_flushbuf(bdev, mode, cmd, arg);
463 case BLKROSET:
464 return blkdev_roset(bdev, mode, cmd, arg);
465 case BLKDISCARD:
466 return blk_ioctl_discard(bdev, mode, arg, 0);
467 case BLKSECDISCARD:
468 return blk_ioctl_discard(bdev, mode, arg,
469 BLKDEV_DISCARD_SECURE);
470 case BLKZEROOUT:
471 return blk_ioctl_zeroout(bdev, mode, arg);
472 case BLKREPORTZONE:
473 return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
474 case BLKRESETZONE:
475 case BLKOPENZONE:
476 case BLKCLOSEZONE:
477 case BLKFINISHZONE:
478 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
479 case BLKGETZONESZ:
480 return put_uint(argp, bdev_zone_sectors(bdev));
481 case BLKGETNRZONES:
482 return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
483 case BLKROGET:
484 return put_int(argp, bdev_read_only(bdev) != 0);
485 case BLKSSZGET: /* get block device logical block size */
486 return put_int(argp, bdev_logical_block_size(bdev));
487 case BLKPBSZGET: /* get block device physical block size */
488 return put_uint(argp, bdev_physical_block_size(bdev));
489 case BLKIOMIN:
490 return put_uint(argp, bdev_io_min(bdev));
491 case BLKIOOPT:
492 return put_uint(argp, bdev_io_opt(bdev));
493 case BLKALIGNOFF:
494 return put_int(argp, bdev_alignment_offset(bdev));
495 case BLKDISCARDZEROES:
496 return put_uint(argp, 0);
497 case BLKSECTGET:
498 max_sectors = min_t(unsigned int, USHRT_MAX,
499 queue_max_sectors(bdev_get_queue(bdev)));
500 return put_ushort(argp, max_sectors);
501 case BLKROTATIONAL:
502 return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
503 case BLKRASET:
504 case BLKFRASET:
505 if(!capable(CAP_SYS_ADMIN))
506 return -EACCES;
507 bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
508 return 0;
509 case BLKRRPART:
510 return blkdev_reread_part(bdev, mode);
511 case BLKTRACESTART:
512 case BLKTRACESTOP:
513 case BLKTRACETEARDOWN:
514 return blk_trace_ioctl(bdev, cmd, argp);
515 case IOC_PR_REGISTER:
516 return blkdev_pr_register(bdev, argp);
517 case IOC_PR_RESERVE:
518 return blkdev_pr_reserve(bdev, argp);
519 case IOC_PR_RELEASE:
520 return blkdev_pr_release(bdev, argp);
521 case IOC_PR_PREEMPT:
522 return blkdev_pr_preempt(bdev, argp, false);
523 case IOC_PR_PREEMPT_ABORT:
524 return blkdev_pr_preempt(bdev, argp, true);
525 case IOC_PR_CLEAR:
526 return blkdev_pr_clear(bdev, argp);
527 default:
528 return -ENOIOCTLCMD;
529 }
530 }
531
532 /*
533 * Always keep this in sync with compat_blkdev_ioctl()
534 * to handle all incompatible commands in both functions.
535 *
536 * New commands must be compatible and go into blkdev_common_ioctl
537 */
blkdev_ioctl(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)538 int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
539 unsigned long arg)
540 {
541 int ret;
542 loff_t size;
543 void __user *argp = (void __user *)arg;
544
545 switch (cmd) {
546 /* These need separate implementations for the data structure */
547 case HDIO_GETGEO:
548 return blkdev_getgeo(bdev, argp);
549 case BLKPG:
550 return blkpg_ioctl(bdev, argp);
551
552 /* Compat mode returns 32-bit data instead of 'long' */
553 case BLKRAGET:
554 case BLKFRAGET:
555 if (!argp)
556 return -EINVAL;
557 return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
558 case BLKGETSIZE:
559 size = i_size_read(bdev->bd_inode);
560 if ((size >> 9) > ~0UL)
561 return -EFBIG;
562 return put_ulong(argp, size >> 9);
563
564 /* The data is compatible, but the command number is different */
565 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
566 return put_int(argp, block_size(bdev));
567 case BLKBSZSET:
568 return blkdev_bszset(bdev, mode, argp);
569 case BLKGETSIZE64:
570 return put_u64(argp, i_size_read(bdev->bd_inode));
571
572 /* Incompatible alignment on i386 */
573 case BLKTRACESETUP:
574 return blk_trace_ioctl(bdev, cmd, argp);
575 default:
576 break;
577 }
578
579 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
580 if (ret != -ENOIOCTLCMD)
581 return ret;
582
583 if (!bdev->bd_disk->fops->ioctl)
584 return -ENOTTY;
585 return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
586 }
587 EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */
588
589 #ifdef CONFIG_COMPAT
590
591 #define BLKBSZGET_32 _IOR(0x12, 112, int)
592 #define BLKBSZSET_32 _IOW(0x12, 113, int)
593 #define BLKGETSIZE64_32 _IOR(0x12, 114, int)
594
595 /* Most of the generic ioctls are handled in the normal fallback path.
596 This assumes the blkdev's low level compat_ioctl always returns
597 ENOIOCTLCMD for unknown ioctls. */
compat_blkdev_ioctl(struct file * file,unsigned cmd,unsigned long arg)598 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
599 {
600 int ret;
601 void __user *argp = compat_ptr(arg);
602 struct block_device *bdev = I_BDEV(file->f_mapping->host);
603 struct gendisk *disk = bdev->bd_disk;
604 fmode_t mode = file->f_mode;
605 loff_t size;
606
607 /*
608 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
609 * to updated it before every ioctl.
610 */
611 if (file->f_flags & O_NDELAY)
612 mode |= FMODE_NDELAY;
613 else
614 mode &= ~FMODE_NDELAY;
615
616 switch (cmd) {
617 /* These need separate implementations for the data structure */
618 case HDIO_GETGEO:
619 return compat_hdio_getgeo(bdev, argp);
620 case BLKPG:
621 return compat_blkpg_ioctl(bdev, argp);
622
623 /* Compat mode returns 32-bit data instead of 'long' */
624 case BLKRAGET:
625 case BLKFRAGET:
626 if (!argp)
627 return -EINVAL;
628 return compat_put_long(argp,
629 (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
630 case BLKGETSIZE:
631 size = i_size_read(bdev->bd_inode);
632 if ((size >> 9) > ~0UL)
633 return -EFBIG;
634 return compat_put_ulong(argp, size >> 9);
635
636 /* The data is compatible, but the command number is different */
637 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
638 return put_int(argp, bdev_logical_block_size(bdev));
639 case BLKBSZSET_32:
640 return blkdev_bszset(bdev, mode, argp);
641 case BLKGETSIZE64_32:
642 return put_u64(argp, i_size_read(bdev->bd_inode));
643
644 /* Incompatible alignment on i386 */
645 case BLKTRACESETUP32:
646 return blk_trace_ioctl(bdev, cmd, argp);
647 default:
648 break;
649 }
650
651 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
652 if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
653 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
654
655 return ret;
656 }
657 #endif
658