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
blk_ioctl_discard(struct block_device * bdev,fmode_t mode,unsigned long arg)85 static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
86 unsigned long arg)
87 {
88 uint64_t range[2];
89 uint64_t start, len;
90 struct inode *inode = bdev->bd_inode;
91 int err;
92
93 if (!(mode & FMODE_WRITE))
94 return -EBADF;
95
96 if (!bdev_max_discard_sectors(bdev))
97 return -EOPNOTSUPP;
98
99 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
100 return -EFAULT;
101
102 start = range[0];
103 len = range[1];
104
105 if (start & 511)
106 return -EINVAL;
107 if (len & 511)
108 return -EINVAL;
109
110 if (start + len > bdev_nr_bytes(bdev))
111 return -EINVAL;
112
113 filemap_invalidate_lock(inode->i_mapping);
114 err = truncate_bdev_range(bdev, mode, start, start + len - 1);
115 if (err)
116 goto fail;
117 err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
118 fail:
119 filemap_invalidate_unlock(inode->i_mapping);
120 return err;
121 }
122
blk_ioctl_secure_erase(struct block_device * bdev,fmode_t mode,void __user * argp)123 static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode,
124 void __user *argp)
125 {
126 uint64_t start, len;
127 uint64_t range[2];
128 int err;
129
130 if (!(mode & FMODE_WRITE))
131 return -EBADF;
132 if (!bdev_max_secure_erase_sectors(bdev))
133 return -EOPNOTSUPP;
134 if (copy_from_user(range, argp, sizeof(range)))
135 return -EFAULT;
136
137 start = range[0];
138 len = range[1];
139 if ((start & 511) || (len & 511))
140 return -EINVAL;
141 if (start + len > bdev_nr_bytes(bdev))
142 return -EINVAL;
143
144 filemap_invalidate_lock(bdev->bd_inode->i_mapping);
145 err = truncate_bdev_range(bdev, mode, start, start + len - 1);
146 if (!err)
147 err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9,
148 GFP_KERNEL);
149 filemap_invalidate_unlock(bdev->bd_inode->i_mapping);
150 return err;
151 }
152
153
blk_ioctl_zeroout(struct block_device * bdev,fmode_t mode,unsigned long arg)154 static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
155 unsigned long arg)
156 {
157 uint64_t range[2];
158 uint64_t start, end, len;
159 struct inode *inode = bdev->bd_inode;
160 int err;
161
162 if (!(mode & FMODE_WRITE))
163 return -EBADF;
164
165 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
166 return -EFAULT;
167
168 start = range[0];
169 len = range[1];
170 end = start + len - 1;
171
172 if (start & 511)
173 return -EINVAL;
174 if (len & 511)
175 return -EINVAL;
176 if (end >= (uint64_t)bdev_nr_bytes(bdev))
177 return -EINVAL;
178 if (end < start)
179 return -EINVAL;
180
181 /* Invalidate the page cache, including dirty pages */
182 filemap_invalidate_lock(inode->i_mapping);
183 err = truncate_bdev_range(bdev, mode, start, end);
184 if (err)
185 goto fail;
186
187 err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
188 BLKDEV_ZERO_NOUNMAP);
189
190 fail:
191 filemap_invalidate_unlock(inode->i_mapping);
192 return err;
193 }
194
put_ushort(unsigned short __user * argp,unsigned short val)195 static int put_ushort(unsigned short __user *argp, unsigned short val)
196 {
197 return put_user(val, argp);
198 }
199
put_int(int __user * argp,int val)200 static int put_int(int __user *argp, int val)
201 {
202 return put_user(val, argp);
203 }
204
put_uint(unsigned int __user * argp,unsigned int val)205 static int put_uint(unsigned int __user *argp, unsigned int val)
206 {
207 return put_user(val, argp);
208 }
209
put_long(long __user * argp,long val)210 static int put_long(long __user *argp, long val)
211 {
212 return put_user(val, argp);
213 }
214
put_ulong(unsigned long __user * argp,unsigned long val)215 static int put_ulong(unsigned long __user *argp, unsigned long val)
216 {
217 return put_user(val, argp);
218 }
219
put_u64(u64 __user * argp,u64 val)220 static int put_u64(u64 __user *argp, u64 val)
221 {
222 return put_user(val, argp);
223 }
224
225 #ifdef CONFIG_COMPAT
compat_put_long(compat_long_t __user * argp,long val)226 static int compat_put_long(compat_long_t __user *argp, long val)
227 {
228 return put_user(val, argp);
229 }
230
compat_put_ulong(compat_ulong_t __user * argp,compat_ulong_t val)231 static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
232 {
233 return put_user(val, argp);
234 }
235 #endif
236
237 #ifdef CONFIG_COMPAT
238 /*
239 * This is the equivalent of compat_ptr_ioctl(), to be used by block
240 * drivers that implement only commands that are completely compatible
241 * between 32-bit and 64-bit user space
242 */
blkdev_compat_ptr_ioctl(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)243 int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
244 unsigned cmd, unsigned long arg)
245 {
246 struct gendisk *disk = bdev->bd_disk;
247
248 if (disk->fops->ioctl)
249 return disk->fops->ioctl(bdev, mode, cmd,
250 (unsigned long)compat_ptr(arg));
251
252 return -ENOIOCTLCMD;
253 }
254 EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
255 #endif
256
blkdev_pr_register(struct block_device * bdev,struct pr_registration __user * arg)257 static int blkdev_pr_register(struct block_device *bdev,
258 struct pr_registration __user *arg)
259 {
260 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
261 struct pr_registration reg;
262
263 if (!capable(CAP_SYS_ADMIN))
264 return -EPERM;
265 if (!ops || !ops->pr_register)
266 return -EOPNOTSUPP;
267 if (copy_from_user(®, arg, sizeof(reg)))
268 return -EFAULT;
269
270 if (reg.flags & ~PR_FL_IGNORE_KEY)
271 return -EOPNOTSUPP;
272 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
273 }
274
blkdev_pr_reserve(struct block_device * bdev,struct pr_reservation __user * arg)275 static int blkdev_pr_reserve(struct block_device *bdev,
276 struct pr_reservation __user *arg)
277 {
278 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
279 struct pr_reservation rsv;
280
281 if (!capable(CAP_SYS_ADMIN))
282 return -EPERM;
283 if (!ops || !ops->pr_reserve)
284 return -EOPNOTSUPP;
285 if (copy_from_user(&rsv, arg, sizeof(rsv)))
286 return -EFAULT;
287
288 if (rsv.flags & ~PR_FL_IGNORE_KEY)
289 return -EOPNOTSUPP;
290 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
291 }
292
blkdev_pr_release(struct block_device * bdev,struct pr_reservation __user * arg)293 static int blkdev_pr_release(struct block_device *bdev,
294 struct pr_reservation __user *arg)
295 {
296 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
297 struct pr_reservation rsv;
298
299 if (!capable(CAP_SYS_ADMIN))
300 return -EPERM;
301 if (!ops || !ops->pr_release)
302 return -EOPNOTSUPP;
303 if (copy_from_user(&rsv, arg, sizeof(rsv)))
304 return -EFAULT;
305
306 if (rsv.flags)
307 return -EOPNOTSUPP;
308 return ops->pr_release(bdev, rsv.key, rsv.type);
309 }
310
blkdev_pr_preempt(struct block_device * bdev,struct pr_preempt __user * arg,bool abort)311 static int blkdev_pr_preempt(struct block_device *bdev,
312 struct pr_preempt __user *arg, bool abort)
313 {
314 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
315 struct pr_preempt p;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -EPERM;
319 if (!ops || !ops->pr_preempt)
320 return -EOPNOTSUPP;
321 if (copy_from_user(&p, arg, sizeof(p)))
322 return -EFAULT;
323
324 if (p.flags)
325 return -EOPNOTSUPP;
326 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
327 }
328
blkdev_pr_clear(struct block_device * bdev,struct pr_clear __user * arg)329 static int blkdev_pr_clear(struct block_device *bdev,
330 struct pr_clear __user *arg)
331 {
332 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
333 struct pr_clear c;
334
335 if (!capable(CAP_SYS_ADMIN))
336 return -EPERM;
337 if (!ops || !ops->pr_clear)
338 return -EOPNOTSUPP;
339 if (copy_from_user(&c, arg, sizeof(c)))
340 return -EFAULT;
341
342 if (c.flags)
343 return -EOPNOTSUPP;
344 return ops->pr_clear(bdev, c.key);
345 }
346
blkdev_flushbuf(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)347 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
348 unsigned cmd, unsigned long arg)
349 {
350 if (!capable(CAP_SYS_ADMIN))
351 return -EACCES;
352 fsync_bdev(bdev);
353 invalidate_bdev(bdev);
354 return 0;
355 }
356
blkdev_roset(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg)357 static int blkdev_roset(struct block_device *bdev, fmode_t mode,
358 unsigned cmd, unsigned long arg)
359 {
360 int ret, n;
361
362 if (!capable(CAP_SYS_ADMIN))
363 return -EACCES;
364
365 if (get_user(n, (int __user *)arg))
366 return -EFAULT;
367 if (bdev->bd_disk->fops->set_read_only) {
368 ret = bdev->bd_disk->fops->set_read_only(bdev, n);
369 if (ret)
370 return ret;
371 }
372 bdev->bd_read_only = n;
373 return 0;
374 }
375
blkdev_getgeo(struct block_device * bdev,struct hd_geometry __user * argp)376 static int blkdev_getgeo(struct block_device *bdev,
377 struct hd_geometry __user *argp)
378 {
379 struct gendisk *disk = bdev->bd_disk;
380 struct hd_geometry geo;
381 int ret;
382
383 if (!argp)
384 return -EINVAL;
385 if (!disk->fops->getgeo)
386 return -ENOTTY;
387
388 /*
389 * We need to set the startsect first, the driver may
390 * want to override it.
391 */
392 memset(&geo, 0, sizeof(geo));
393 geo.start = get_start_sect(bdev);
394 ret = disk->fops->getgeo(bdev, &geo);
395 if (ret)
396 return ret;
397 if (copy_to_user(argp, &geo, sizeof(geo)))
398 return -EFAULT;
399 return 0;
400 }
401
402 #ifdef CONFIG_COMPAT
403 struct compat_hd_geometry {
404 unsigned char heads;
405 unsigned char sectors;
406 unsigned short cylinders;
407 u32 start;
408 };
409
compat_hdio_getgeo(struct block_device * bdev,struct compat_hd_geometry __user * ugeo)410 static int compat_hdio_getgeo(struct block_device *bdev,
411 struct compat_hd_geometry __user *ugeo)
412 {
413 struct gendisk *disk = bdev->bd_disk;
414 struct hd_geometry geo;
415 int ret;
416
417 if (!ugeo)
418 return -EINVAL;
419 if (!disk->fops->getgeo)
420 return -ENOTTY;
421
422 memset(&geo, 0, sizeof(geo));
423 /*
424 * We need to set the startsect first, the driver may
425 * want to override it.
426 */
427 geo.start = get_start_sect(bdev);
428 ret = disk->fops->getgeo(bdev, &geo);
429 if (ret)
430 return ret;
431
432 ret = copy_to_user(ugeo, &geo, 4);
433 ret |= put_user(geo.start, &ugeo->start);
434 if (ret)
435 ret = -EFAULT;
436
437 return ret;
438 }
439 #endif
440
441 /* set the logical block size */
blkdev_bszset(struct block_device * bdev,fmode_t mode,int __user * argp)442 static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
443 int __user *argp)
444 {
445 int ret, n;
446
447 if (!capable(CAP_SYS_ADMIN))
448 return -EACCES;
449 if (!argp)
450 return -EINVAL;
451 if (get_user(n, argp))
452 return -EFAULT;
453
454 if (mode & FMODE_EXCL)
455 return set_blocksize(bdev, n);
456
457 if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
458 return -EBUSY;
459 ret = set_blocksize(bdev, n);
460 blkdev_put(bdev, mode | FMODE_EXCL);
461
462 return ret;
463 }
464
465 /*
466 * Common commands that are handled the same way on native and compat
467 * user space. Note the separate arg/argp parameters that are needed
468 * to deal with the compat_ptr() conversion.
469 */
blkdev_common_ioctl(struct block_device * bdev,fmode_t mode,unsigned cmd,unsigned long arg,void __user * argp)470 static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
471 unsigned cmd, unsigned long arg, void __user *argp)
472 {
473 unsigned int max_sectors;
474
475 switch (cmd) {
476 case BLKFLSBUF:
477 return blkdev_flushbuf(bdev, mode, cmd, arg);
478 case BLKROSET:
479 return blkdev_roset(bdev, mode, cmd, arg);
480 case BLKDISCARD:
481 return blk_ioctl_discard(bdev, mode, arg);
482 case BLKSECDISCARD:
483 return blk_ioctl_secure_erase(bdev, mode, argp);
484 case BLKZEROOUT:
485 return blk_ioctl_zeroout(bdev, mode, arg);
486 case BLKGETDISKSEQ:
487 return put_u64(argp, bdev->bd_disk->diskseq);
488 case BLKREPORTZONE:
489 return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
490 case BLKRESETZONE:
491 case BLKOPENZONE:
492 case BLKCLOSEZONE:
493 case BLKFINISHZONE:
494 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
495 case BLKGETZONESZ:
496 return put_uint(argp, bdev_zone_sectors(bdev));
497 case BLKGETNRZONES:
498 return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
499 case BLKROGET:
500 return put_int(argp, bdev_read_only(bdev) != 0);
501 case BLKSSZGET: /* get block device logical block size */
502 return put_int(argp, bdev_logical_block_size(bdev));
503 case BLKPBSZGET: /* get block device physical block size */
504 return put_uint(argp, bdev_physical_block_size(bdev));
505 case BLKIOMIN:
506 return put_uint(argp, bdev_io_min(bdev));
507 case BLKIOOPT:
508 return put_uint(argp, bdev_io_opt(bdev));
509 case BLKALIGNOFF:
510 return put_int(argp, bdev_alignment_offset(bdev));
511 case BLKDISCARDZEROES:
512 return put_uint(argp, 0);
513 case BLKSECTGET:
514 max_sectors = min_t(unsigned int, USHRT_MAX,
515 queue_max_sectors(bdev_get_queue(bdev)));
516 return put_ushort(argp, max_sectors);
517 case BLKROTATIONAL:
518 return put_ushort(argp, !bdev_nonrot(bdev));
519 case BLKRASET:
520 case BLKFRASET:
521 if(!capable(CAP_SYS_ADMIN))
522 return -EACCES;
523 bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
524 return 0;
525 case BLKRRPART:
526 if (!capable(CAP_SYS_ADMIN))
527 return -EACCES;
528 if (bdev_is_partition(bdev))
529 return -EINVAL;
530 return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL);
531 case BLKTRACESTART:
532 case BLKTRACESTOP:
533 case BLKTRACETEARDOWN:
534 return blk_trace_ioctl(bdev, cmd, argp);
535 case IOC_PR_REGISTER:
536 return blkdev_pr_register(bdev, argp);
537 case IOC_PR_RESERVE:
538 return blkdev_pr_reserve(bdev, argp);
539 case IOC_PR_RELEASE:
540 return blkdev_pr_release(bdev, argp);
541 case IOC_PR_PREEMPT:
542 return blkdev_pr_preempt(bdev, argp, false);
543 case IOC_PR_PREEMPT_ABORT:
544 return blkdev_pr_preempt(bdev, argp, true);
545 case IOC_PR_CLEAR:
546 return blkdev_pr_clear(bdev, argp);
547 default:
548 return -ENOIOCTLCMD;
549 }
550 }
551
552 /*
553 * Always keep this in sync with compat_blkdev_ioctl()
554 * to handle all incompatible commands in both functions.
555 *
556 * New commands must be compatible and go into blkdev_common_ioctl
557 */
blkdev_ioctl(struct file * file,unsigned cmd,unsigned long arg)558 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
559 {
560 struct block_device *bdev = I_BDEV(file->f_mapping->host);
561 void __user *argp = (void __user *)arg;
562 fmode_t mode = file->f_mode;
563 int ret;
564
565 /*
566 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
567 * to updated it before every ioctl.
568 */
569 if (file->f_flags & O_NDELAY)
570 mode |= FMODE_NDELAY;
571 else
572 mode &= ~FMODE_NDELAY;
573
574 switch (cmd) {
575 /* These need separate implementations for the data structure */
576 case HDIO_GETGEO:
577 return blkdev_getgeo(bdev, argp);
578 case BLKPG:
579 return blkpg_ioctl(bdev, argp);
580
581 /* Compat mode returns 32-bit data instead of 'long' */
582 case BLKRAGET:
583 case BLKFRAGET:
584 if (!argp)
585 return -EINVAL;
586 return put_long(argp,
587 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
588 case BLKGETSIZE:
589 if (bdev_nr_sectors(bdev) > ~0UL)
590 return -EFBIG;
591 return put_ulong(argp, bdev_nr_sectors(bdev));
592
593 /* The data is compatible, but the command number is different */
594 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
595 return put_int(argp, block_size(bdev));
596 case BLKBSZSET:
597 return blkdev_bszset(bdev, mode, argp);
598 case BLKGETSIZE64:
599 return put_u64(argp, bdev_nr_bytes(bdev));
600
601 /* Incompatible alignment on i386 */
602 case BLKTRACESETUP:
603 return blk_trace_ioctl(bdev, cmd, argp);
604 default:
605 break;
606 }
607
608 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
609 if (ret != -ENOIOCTLCMD)
610 return ret;
611
612 if (!bdev->bd_disk->fops->ioctl)
613 return -ENOTTY;
614 return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
615 }
616
617 #ifdef CONFIG_COMPAT
618
619 #define BLKBSZGET_32 _IOR(0x12, 112, int)
620 #define BLKBSZSET_32 _IOW(0x12, 113, int)
621 #define BLKGETSIZE64_32 _IOR(0x12, 114, int)
622
623 /* Most of the generic ioctls are handled in the normal fallback path.
624 This assumes the blkdev's low level compat_ioctl always returns
625 ENOIOCTLCMD for unknown ioctls. */
compat_blkdev_ioctl(struct file * file,unsigned cmd,unsigned long arg)626 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
627 {
628 int ret;
629 void __user *argp = compat_ptr(arg);
630 struct block_device *bdev = I_BDEV(file->f_mapping->host);
631 struct gendisk *disk = bdev->bd_disk;
632 fmode_t mode = file->f_mode;
633
634 /*
635 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
636 * to updated it before every ioctl.
637 */
638 if (file->f_flags & O_NDELAY)
639 mode |= FMODE_NDELAY;
640 else
641 mode &= ~FMODE_NDELAY;
642
643 switch (cmd) {
644 /* These need separate implementations for the data structure */
645 case HDIO_GETGEO:
646 return compat_hdio_getgeo(bdev, argp);
647 case BLKPG:
648 return compat_blkpg_ioctl(bdev, argp);
649
650 /* Compat mode returns 32-bit data instead of 'long' */
651 case BLKRAGET:
652 case BLKFRAGET:
653 if (!argp)
654 return -EINVAL;
655 return compat_put_long(argp,
656 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
657 case BLKGETSIZE:
658 if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0)
659 return -EFBIG;
660 return compat_put_ulong(argp, bdev_nr_sectors(bdev));
661
662 /* The data is compatible, but the command number is different */
663 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
664 return put_int(argp, bdev_logical_block_size(bdev));
665 case BLKBSZSET_32:
666 return blkdev_bszset(bdev, mode, argp);
667 case BLKGETSIZE64_32:
668 return put_u64(argp, bdev_nr_bytes(bdev));
669
670 /* Incompatible alignment on i386 */
671 case BLKTRACESETUP32:
672 return blk_trace_ioctl(bdev, cmd, argp);
673 default:
674 break;
675 }
676
677 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
678 if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
679 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
680
681 return ret;
682 }
683 #endif
684