blk-mq: fix two misuses on RQF_USE_SCHED
[linux-block.git] / block / ioctl.c
CommitLineData
3dcf60bc 1// SPDX-License-Identifier: GPL-2.0
c59ede7b 2#include <linux/capability.h>
ee6a129d 3#include <linux/compat.h>
1da177e4 4#include <linux/blkdev.h>
d5decd3b 5#include <linux/export.h>
5a0e3ad6 6#include <linux/gfp.h>
1da177e4 7#include <linux/blkpg.h>
a885c8c4 8#include <linux/hdreg.h>
1da177e4 9#include <linux/backing-dev.h>
ff01bb48 10#include <linux/fs.h>
2056a782 11#include <linux/blktrace_api.h>
bbd3e064 12#include <linux/pr.h>
7c0f6ba6 13#include <linux/uaccess.h>
581e2600 14#include "blk.h"
1da177e4 15
5fb889f5
AB
16static int blkpg_do_ioctl(struct block_device *bdev,
17 struct blkpg_partition __user *upart, int op)
1da177e4 18{
7f6be376 19 struct gendisk *disk = bdev->bd_disk;
1da177e4
LT
20 struct blkpg_partition p;
21 long long start, length;
1da177e4
LT
22
23 if (!capable(CAP_SYS_ADMIN))
24 return -EACCES;
5fb889f5 25 if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
1da177e4 26 return -EFAULT;
fa01b1e9 27 if (bdev_is_partition(bdev))
1da177e4 28 return -EINVAL;
88e34126 29
fa9156ae
CH
30 if (p.pno <= 0)
31 return -EINVAL;
e71bf0d0 32
fa9156ae 33 if (op == BLKPG_DEL_PARTITION)
926fbb16 34 return bdev_del_partition(disk, p.pno);
e71bf0d0 35
fa9156ae
CH
36 start = p.start >> SECTOR_SHIFT;
37 length = p.length >> SECTOR_SHIFT;
e71bf0d0 38
fa9156ae
CH
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))
1da177e4 43 return -EINVAL;
7f6be376 44 return bdev_add_partition(disk, p.pno, start, length);
fa9156ae 45 case BLKPG_RESIZE_PARTITION:
3d2e7989 46 return bdev_resize_partition(disk, p.pno, start, length);
fa9156ae
CH
47 default:
48 return -EINVAL;
1da177e4
LT
49 }
50}
51
5fb889f5
AB
52static 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
65struct 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
72static 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
05bdb996 85static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
44abff2c 86 unsigned long arg)
d30a2605 87{
d8e4bb81
CH
88 uint64_t range[2];
89 uint64_t start, len;
7607c44c 90 struct inode *inode = bdev->bd_inode;
384d87ef 91 int err;
d8e4bb81 92
05bdb996 93 if (!(mode & BLK_OPEN_WRITE))
d8e4bb81
CH
94 return -EBADF;
95
70200574 96 if (!bdev_max_discard_sectors(bdev))
351499a1
DM
97 return -EOPNOTSUPP;
98
d8e4bb81
CH
99 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
100 return -EFAULT;
101
102 start = range[0];
103 len = range[1];
8d57a98c 104
d30a2605
DW
105 if (start & 511)
106 return -EINVAL;
107 if (len & 511)
108 return -EINVAL;
d30a2605 109
946e9937 110 if (start + len > bdev_nr_bytes(bdev))
d30a2605 111 return -EINVAL;
384d87ef 112
7607c44c 113 filemap_invalidate_lock(inode->i_mapping);
384d87ef
JK
114 err = truncate_bdev_range(bdev, mode, start, start + len - 1);
115 if (err)
7607c44c 116 goto fail;
44abff2c 117 err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
7607c44c
SK
118fail:
119 filemap_invalidate_unlock(inode->i_mapping);
120 return err;
d30a2605
DW
121}
122
05bdb996 123static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
44abff2c
CH
124 void __user *argp)
125{
126 uint64_t start, len;
127 uint64_t range[2];
128 int err;
129
05bdb996 130 if (!(mode & BLK_OPEN_WRITE))
44abff2c
CH
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
05bdb996 154static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
d8e4bb81 155 unsigned long arg)
66ba32dc 156{
d8e4bb81 157 uint64_t range[2];
22dd6d35 158 uint64_t start, end, len;
35e4c6c1 159 struct inode *inode = bdev->bd_inode;
384d87ef 160 int err;
d8e4bb81 161
05bdb996 162 if (!(mode & BLK_OPEN_WRITE))
d8e4bb81
CH
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];
22dd6d35 170 end = start + len - 1;
d8e4bb81 171
66ba32dc
MP
172 if (start & 511)
173 return -EINVAL;
174 if (len & 511)
175 return -EINVAL;
946e9937 176 if (end >= (uint64_t)bdev_nr_bytes(bdev))
22dd6d35
DW
177 return -EINVAL;
178 if (end < start)
66ba32dc
MP
179 return -EINVAL;
180
22dd6d35 181 /* Invalidate the page cache, including dirty pages */
35e4c6c1 182 filemap_invalidate_lock(inode->i_mapping);
384d87ef
JK
183 err = truncate_bdev_range(bdev, mode, start, end);
184 if (err)
35e4c6c1
SK
185 goto fail;
186
187 err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
188 BLKDEV_ZERO_NOUNMAP);
22dd6d35 189
35e4c6c1
SK
190fail:
191 filemap_invalidate_unlock(inode->i_mapping);
192 return err;
66ba32dc
MP
193}
194
9b81648c 195static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4 196{
9b81648c 197 return put_user(val, argp);
1da177e4
LT
198}
199
9b81648c 200static int put_int(int __user *argp, int val)
1da177e4 201{
9b81648c 202 return put_user(val, argp);
1da177e4
LT
203}
204
9b81648c 205static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20 206{
9b81648c 207 return put_user(val, argp);
ac481c20
MP
208}
209
9b81648c 210static int put_long(long __user *argp, long val)
1da177e4 211{
9b81648c 212 return put_user(val, argp);
1da177e4
LT
213}
214
9b81648c 215static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4 216{
9b81648c 217 return put_user(val, argp);
1da177e4
LT
218}
219
9b81648c 220static int put_u64(u64 __user *argp, u64 val)
1da177e4 221{
9b81648c 222 return put_user(val, argp);
1da177e4
LT
223}
224
bdc1ddad 225#ifdef CONFIG_COMPAT
c8210a57 226static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad 227{
9b81648c 228 return put_user(val, argp);
bdc1ddad
AB
229}
230
c8210a57 231static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad 232{
9b81648c 233 return put_user(val, argp);
bdc1ddad
AB
234}
235#endif
236
ee6a129d
AB
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 */
05bdb996 243int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode,
ee6a129d
AB
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}
254EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
255#endif
256
9a72a024 257static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode)
12629621
JX
258{
259 /* no sense to make reservations for partitions */
260 if (bdev_is_partition(bdev))
261 return false;
262
263 if (capable(CAP_SYS_ADMIN))
264 return true;
9a72a024
JX
265 /*
266 * Only allow unprivileged reservations if the file descriptor is open
267 * for writing.
268 */
269 return mode & BLK_OPEN_WRITE;
12629621
JX
270}
271
9a72a024 272static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode,
bbd3e064
CH
273 struct pr_registration __user *arg)
274{
275 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
276 struct pr_registration reg;
277
9a72a024 278 if (!blkdev_pr_allowed(bdev, mode))
bbd3e064
CH
279 return -EPERM;
280 if (!ops || !ops->pr_register)
281 return -EOPNOTSUPP;
282 if (copy_from_user(&reg, arg, sizeof(reg)))
283 return -EFAULT;
284
285 if (reg.flags & ~PR_FL_IGNORE_KEY)
286 return -EOPNOTSUPP;
287 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
288}
289
9a72a024 290static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode,
bbd3e064
CH
291 struct pr_reservation __user *arg)
292{
293 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
294 struct pr_reservation rsv;
295
9a72a024 296 if (!blkdev_pr_allowed(bdev, mode))
bbd3e064
CH
297 return -EPERM;
298 if (!ops || !ops->pr_reserve)
299 return -EOPNOTSUPP;
300 if (copy_from_user(&rsv, arg, sizeof(rsv)))
301 return -EFAULT;
302
303 if (rsv.flags & ~PR_FL_IGNORE_KEY)
304 return -EOPNOTSUPP;
305 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
306}
307
9a72a024 308static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode,
bbd3e064
CH
309 struct pr_reservation __user *arg)
310{
311 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
312 struct pr_reservation rsv;
313
9a72a024 314 if (!blkdev_pr_allowed(bdev, mode))
bbd3e064
CH
315 return -EPERM;
316 if (!ops || !ops->pr_release)
317 return -EOPNOTSUPP;
318 if (copy_from_user(&rsv, arg, sizeof(rsv)))
319 return -EFAULT;
320
321 if (rsv.flags)
322 return -EOPNOTSUPP;
323 return ops->pr_release(bdev, rsv.key, rsv.type);
324}
325
9a72a024 326static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode,
bbd3e064
CH
327 struct pr_preempt __user *arg, bool abort)
328{
329 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
330 struct pr_preempt p;
331
9a72a024 332 if (!blkdev_pr_allowed(bdev, mode))
bbd3e064
CH
333 return -EPERM;
334 if (!ops || !ops->pr_preempt)
335 return -EOPNOTSUPP;
336 if (copy_from_user(&p, arg, sizeof(p)))
337 return -EFAULT;
338
339 if (p.flags)
340 return -EOPNOTSUPP;
341 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
342}
343
9a72a024 344static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode,
bbd3e064
CH
345 struct pr_clear __user *arg)
346{
347 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
348 struct pr_clear c;
349
9a72a024 350 if (!blkdev_pr_allowed(bdev, mode))
bbd3e064
CH
351 return -EPERM;
352 if (!ops || !ops->pr_clear)
353 return -EOPNOTSUPP;
354 if (copy_from_user(&c, arg, sizeof(c)))
355 return -EFAULT;
356
357 if (c.flags)
358 return -EOPNOTSUPP;
359 return ops->pr_clear(bdev, c.key);
360}
361
5e4ea834
CH
362static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd,
363 unsigned long arg)
bb93e3a5 364{
d8e4bb81
CH
365 if (!capable(CAP_SYS_ADMIN))
366 return -EACCES;
d8e4bb81
CH
367 fsync_bdev(bdev);
368 invalidate_bdev(bdev);
369 return 0;
370}
d30a2605 371
5e4ea834
CH
372static int blkdev_roset(struct block_device *bdev, unsigned cmd,
373 unsigned long arg)
d8e4bb81
CH
374{
375 int ret, n;
d30a2605 376
bb749b31
ID
377 if (!capable(CAP_SYS_ADMIN))
378 return -EACCES;
379
d8e4bb81
CH
380 if (get_user(n, (int __user *)arg))
381 return -EFAULT;
e00adcad
CH
382 if (bdev->bd_disk->fops->set_read_only) {
383 ret = bdev->bd_disk->fops->set_read_only(bdev, n);
384 if (ret)
385 return ret;
386 }
83950d35 387 bdev->bd_read_only = n;
d8e4bb81
CH
388 return 0;
389}
d30a2605 390
d8e4bb81
CH
391static int blkdev_getgeo(struct block_device *bdev,
392 struct hd_geometry __user *argp)
393{
394 struct gendisk *disk = bdev->bd_disk;
395 struct hd_geometry geo;
396 int ret;
d30a2605 397
d8e4bb81
CH
398 if (!argp)
399 return -EINVAL;
400 if (!disk->fops->getgeo)
401 return -ENOTTY;
402
403 /*
404 * We need to set the startsect first, the driver may
405 * want to override it.
406 */
407 memset(&geo, 0, sizeof(geo));
408 geo.start = get_start_sect(bdev);
409 ret = disk->fops->getgeo(bdev, &geo);
410 if (ret)
411 return ret;
412 if (copy_to_user(argp, &geo, sizeof(geo)))
413 return -EFAULT;
414 return 0;
415}
66ba32dc 416
bdc1ddad
AB
417#ifdef CONFIG_COMPAT
418struct compat_hd_geometry {
419 unsigned char heads;
420 unsigned char sectors;
421 unsigned short cylinders;
422 u32 start;
423};
424
9b81648c
AB
425static int compat_hdio_getgeo(struct block_device *bdev,
426 struct compat_hd_geometry __user *ugeo)
bdc1ddad 427{
9b81648c 428 struct gendisk *disk = bdev->bd_disk;
bdc1ddad
AB
429 struct hd_geometry geo;
430 int ret;
431
432 if (!ugeo)
433 return -EINVAL;
434 if (!disk->fops->getgeo)
435 return -ENOTTY;
436
437 memset(&geo, 0, sizeof(geo));
438 /*
439 * We need to set the startsect first, the driver may
440 * want to override it.
441 */
442 geo.start = get_start_sect(bdev);
443 ret = disk->fops->getgeo(bdev, &geo);
444 if (ret)
445 return ret;
446
447 ret = copy_to_user(ugeo, &geo, 4);
448 ret |= put_user(geo.start, &ugeo->start);
449 if (ret)
450 ret = -EFAULT;
451
452 return ret;
453}
454#endif
455
d8e4bb81 456/* set the logical block size */
05bdb996 457static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode,
d8e4bb81
CH
458 int __user *argp)
459{
460 int ret, n;
66ba32dc 461
d8e4bb81
CH
462 if (!capable(CAP_SYS_ADMIN))
463 return -EACCES;
464 if (!argp)
465 return -EINVAL;
466 if (get_user(n, argp))
467 return -EFAULT;
66ba32dc 468
05bdb996 469 if (mode & BLK_OPEN_EXCL)
47816282 470 return set_blocksize(bdev, n);
d30a2605 471
2736e8ee 472 if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode, &bdev, NULL)))
47816282 473 return -EBUSY;
d8e4bb81 474 ret = set_blocksize(bdev, n);
2736e8ee 475 blkdev_put(bdev, &bdev);
47816282 476
d8e4bb81
CH
477 return ret;
478}
a885c8c4 479
d8e4bb81 480/*
9b81648c
AB
481 * Common commands that are handled the same way on native and compat
482 * user space. Note the separate arg/argp parameters that are needed
483 * to deal with the compat_ptr() conversion.
d8e4bb81 484 */
05bdb996 485static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
0f77b29a
YK
486 unsigned int cmd, unsigned long arg,
487 void __user *argp)
d8e4bb81 488{
d8e4bb81
CH
489 unsigned int max_sectors;
490
491 switch (cmd) {
492 case BLKFLSBUF:
5e4ea834 493 return blkdev_flushbuf(bdev, cmd, arg);
d8e4bb81 494 case BLKROSET:
5e4ea834 495 return blkdev_roset(bdev, cmd, arg);
d8e4bb81 496 case BLKDISCARD:
44abff2c 497 return blk_ioctl_discard(bdev, mode, arg);
d8e4bb81 498 case BLKSECDISCARD:
44abff2c 499 return blk_ioctl_secure_erase(bdev, mode, argp);
d8e4bb81
CH
500 case BLKZEROOUT:
501 return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b
MC
502 case BLKGETDISKSEQ:
503 return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 504 case BLKREPORTZONE:
5e4ea834 505 return blkdev_report_zones_ioctl(bdev, cmd, arg);
3ed05a98 506 case BLKRESETZONE:
e876df1f
AJ
507 case BLKOPENZONE:
508 case BLKCLOSEZONE:
509 case BLKFINISHZONE:
510 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757 511 case BLKGETZONESZ:
9b81648c 512 return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee 513 case BLKGETNRZONES:
b623e347 514 return put_uint(argp, bdev_nr_zones(bdev));
45048d09 515 case BLKROGET:
9b81648c 516 return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20 517 case BLKSSZGET: /* get block device logical block size */
9b81648c 518 return put_int(argp, bdev_logical_block_size(bdev));
ac481c20 519 case BLKPBSZGET: /* get block device physical block size */
9b81648c 520 return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20 521 case BLKIOMIN:
9b81648c 522 return put_uint(argp, bdev_io_min(bdev));
ac481c20 523 case BLKIOOPT:
9b81648c 524 return put_uint(argp, bdev_io_opt(bdev));
ac481c20 525 case BLKALIGNOFF:
9b81648c 526 return put_int(argp, bdev_alignment_offset(bdev));
98262f27 527 case BLKDISCARDZEROES:
9b81648c 528 return put_uint(argp, 0);
45048d09 529 case BLKSECTGET:
63f26496
AM
530 max_sectors = min_t(unsigned int, USHRT_MAX,
531 queue_max_sectors(bdev_get_queue(bdev)));
9b81648c 532 return put_ushort(argp, max_sectors);
ef00f59c 533 case BLKROTATIONAL:
10f0d2a5 534 return put_ushort(argp, !bdev_nonrot(bdev));
45048d09
AV
535 case BLKRASET:
536 case BLKFRASET:
537 if(!capable(CAP_SYS_ADMIN))
538 return -EACCES;
a11d7fc2 539 bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09 540 return 0;
45048d09 541 case BLKRRPART:
e16e506c
CH
542 if (!capable(CAP_SYS_ADMIN))
543 return -EACCES;
544 if (bdev_is_partition(bdev))
545 return -EINVAL;
e5cfefa9 546 return disk_scan_partitions(bdev->bd_disk, mode);
45048d09
AV
547 case BLKTRACESTART:
548 case BLKTRACESTOP:
45048d09 549 case BLKTRACETEARDOWN:
d8e4bb81 550 return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 551 case IOC_PR_REGISTER:
9a72a024 552 return blkdev_pr_register(bdev, mode, argp);
bbd3e064 553 case IOC_PR_RESERVE:
9a72a024 554 return blkdev_pr_reserve(bdev, mode, argp);
bbd3e064 555 case IOC_PR_RELEASE:
9a72a024 556 return blkdev_pr_release(bdev, mode, argp);
bbd3e064 557 case IOC_PR_PREEMPT:
9a72a024 558 return blkdev_pr_preempt(bdev, mode, argp, false);
bbd3e064 559 case IOC_PR_PREEMPT_ABORT:
9a72a024 560 return blkdev_pr_preempt(bdev, mode, argp, true);
bbd3e064 561 case IOC_PR_CLEAR:
9a72a024 562 return blkdev_pr_clear(bdev, mode, argp);
45048d09 563 default:
9b81648c 564 return -ENOIOCTLCMD;
45048d09 565 }
1da177e4 566}
9b81648c
AB
567
568/*
569 * Always keep this in sync with compat_blkdev_ioctl()
570 * to handle all incompatible commands in both functions.
571 *
572 * New commands must be compatible and go into blkdev_common_ioctl
573 */
8a709512 574long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
9b81648c 575{
8a709512 576 struct block_device *bdev = I_BDEV(file->f_mapping->host);
9b81648c 577 void __user *argp = (void __user *)arg;
05bdb996 578 blk_mode_t mode = file_to_blk_mode(file);
8a709512
CH
579 int ret;
580
9b81648c
AB
581 switch (cmd) {
582 /* These need separate implementations for the data structure */
583 case HDIO_GETGEO:
584 return blkdev_getgeo(bdev, argp);
585 case BLKPG:
586 return blkpg_ioctl(bdev, argp);
587
588 /* Compat mode returns 32-bit data instead of 'long' */
589 case BLKRAGET:
590 case BLKFRAGET:
591 if (!argp)
592 return -EINVAL;
a11d7fc2
CH
593 return put_long(argp,
594 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
9b81648c 595 case BLKGETSIZE:
946e9937 596 if (bdev_nr_sectors(bdev) > ~0UL)
9b81648c 597 return -EFBIG;
946e9937 598 return put_ulong(argp, bdev_nr_sectors(bdev));
9b81648c
AB
599
600 /* The data is compatible, but the command number is different */
601 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
602 return put_int(argp, block_size(bdev));
603 case BLKBSZSET:
604 return blkdev_bszset(bdev, mode, argp);
605 case BLKGETSIZE64:
946e9937 606 return put_u64(argp, bdev_nr_bytes(bdev));
9b81648c
AB
607
608 /* Incompatible alignment on i386 */
609 case BLKTRACESETUP:
610 return blk_trace_ioctl(bdev, cmd, argp);
611 default:
612 break;
613 }
614
0f77b29a 615 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f
CH
616 if (ret != -ENOIOCTLCMD)
617 return ret;
9b81648c 618
a7cb3d2f
CH
619 if (!bdev->bd_disk->fops->ioctl)
620 return -ENOTTY;
621 return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c 622}
bdc1ddad
AB
623
624#ifdef CONFIG_COMPAT
9b81648c 625
bdc1ddad
AB
626#define BLKBSZGET_32 _IOR(0x12, 112, int)
627#define BLKBSZSET_32 _IOW(0x12, 113, int)
628#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
629
630/* Most of the generic ioctls are handled in the normal fallback path.
631 This assumes the blkdev's low level compat_ioctl always returns
632 ENOIOCTLCMD for unknown ioctls. */
633long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
634{
9b81648c
AB
635 int ret;
636 void __user *argp = compat_ptr(arg);
4e7b5671 637 struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad 638 struct gendisk *disk = bdev->bd_disk;
05bdb996 639 blk_mode_t mode = file_to_blk_mode(file);
bdc1ddad
AB
640
641 switch (cmd) {
9b81648c 642 /* These need separate implementations for the data structure */
bdc1ddad 643 case HDIO_GETGEO:
9b81648c 644 return compat_hdio_getgeo(bdev, argp);
bdc1ddad 645 case BLKPG:
9b81648c
AB
646 return compat_blkpg_ioctl(bdev, argp);
647
648 /* Compat mode returns 32-bit data instead of 'long' */
bdc1ddad
AB
649 case BLKRAGET:
650 case BLKFRAGET:
9b81648c 651 if (!argp)
bdc1ddad 652 return -EINVAL;
9b81648c 653 return compat_put_long(argp,
a11d7fc2 654 (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
bdc1ddad 655 case BLKGETSIZE:
ccf16413 656 if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0)
bdc1ddad 657 return -EFBIG;
946e9937 658 return compat_put_ulong(argp, bdev_nr_sectors(bdev));
bdc1ddad 659
9b81648c
AB
660 /* The data is compatible, but the command number is different */
661 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
662 return put_int(argp, bdev_logical_block_size(bdev));
663 case BLKBSZSET_32:
664 return blkdev_bszset(bdev, mode, argp);
bdc1ddad 665 case BLKGETSIZE64_32:
946e9937 666 return put_u64(argp, bdev_nr_bytes(bdev));
bdc1ddad 667
9b81648c 668 /* Incompatible alignment on i386 */
bdc1ddad 669 case BLKTRACESETUP32:
9b81648c 670 return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad 671 default:
9b81648c 672 break;
bdc1ddad 673 }
9b81648c 674
0f77b29a 675 ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
9b81648c
AB
676 if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
677 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
678
679 return ret;
bdc1ddad
AB
680}
681#endif