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1 | #include <linux/capability.h> | |
2 | #include <linux/blkdev.h> | |
3 | #include <linux/export.h> | |
4 | #include <linux/gfp.h> | |
5 | #include <linux/blkpg.h> | |
6 | #include <linux/hdreg.h> | |
7 | #include <linux/backing-dev.h> | |
8 | #include <linux/fs.h> | |
9 | #include <linux/blktrace_api.h> | |
10 | #include <linux/pr.h> | |
11 | #include <asm/uaccess.h> | |
12 | ||
13 | static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg) | |
14 | { | |
15 | struct block_device *bdevp; | |
16 | struct gendisk *disk; | |
17 | struct hd_struct *part, *lpart; | |
18 | struct blkpg_ioctl_arg a; | |
19 | struct blkpg_partition p; | |
20 | struct disk_part_iter piter; | |
21 | long long start, length; | |
22 | int partno; | |
23 | ||
24 | if (!capable(CAP_SYS_ADMIN)) | |
25 | return -EACCES; | |
26 | if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg))) | |
27 | return -EFAULT; | |
28 | if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition))) | |
29 | return -EFAULT; | |
30 | disk = bdev->bd_disk; | |
31 | if (bdev != bdev->bd_contains) | |
32 | return -EINVAL; | |
33 | partno = p.pno; | |
34 | if (partno <= 0) | |
35 | return -EINVAL; | |
36 | switch (a.op) { | |
37 | case BLKPG_ADD_PARTITION: | |
38 | start = p.start >> 9; | |
39 | length = p.length >> 9; | |
40 | /* check for fit in a hd_struct */ | |
41 | if (sizeof(sector_t) == sizeof(long) && | |
42 | sizeof(long long) > sizeof(long)) { | |
43 | long pstart = start, plength = length; | |
44 | if (pstart != start || plength != length | |
45 | || pstart < 0 || plength < 0 || partno > 65535) | |
46 | return -EINVAL; | |
47 | } | |
48 | ||
49 | mutex_lock(&bdev->bd_mutex); | |
50 | ||
51 | /* overlap? */ | |
52 | disk_part_iter_init(&piter, disk, | |
53 | DISK_PITER_INCL_EMPTY); | |
54 | while ((part = disk_part_iter_next(&piter))) { | |
55 | if (!(start + length <= part->start_sect || | |
56 | start >= part->start_sect + part->nr_sects)) { | |
57 | disk_part_iter_exit(&piter); | |
58 | mutex_unlock(&bdev->bd_mutex); | |
59 | return -EBUSY; | |
60 | } | |
61 | } | |
62 | disk_part_iter_exit(&piter); | |
63 | ||
64 | /* all seems OK */ | |
65 | part = add_partition(disk, partno, start, length, | |
66 | ADDPART_FLAG_NONE, NULL); | |
67 | mutex_unlock(&bdev->bd_mutex); | |
68 | return PTR_ERR_OR_ZERO(part); | |
69 | case BLKPG_DEL_PARTITION: | |
70 | part = disk_get_part(disk, partno); | |
71 | if (!part) | |
72 | return -ENXIO; | |
73 | ||
74 | bdevp = bdget(part_devt(part)); | |
75 | disk_put_part(part); | |
76 | if (!bdevp) | |
77 | return -ENOMEM; | |
78 | ||
79 | mutex_lock(&bdevp->bd_mutex); | |
80 | if (bdevp->bd_openers) { | |
81 | mutex_unlock(&bdevp->bd_mutex); | |
82 | bdput(bdevp); | |
83 | return -EBUSY; | |
84 | } | |
85 | /* all seems OK */ | |
86 | fsync_bdev(bdevp); | |
87 | invalidate_bdev(bdevp); | |
88 | ||
89 | mutex_lock_nested(&bdev->bd_mutex, 1); | |
90 | delete_partition(disk, partno); | |
91 | mutex_unlock(&bdev->bd_mutex); | |
92 | mutex_unlock(&bdevp->bd_mutex); | |
93 | bdput(bdevp); | |
94 | ||
95 | return 0; | |
96 | case BLKPG_RESIZE_PARTITION: | |
97 | start = p.start >> 9; | |
98 | /* new length of partition in bytes */ | |
99 | length = p.length >> 9; | |
100 | /* check for fit in a hd_struct */ | |
101 | if (sizeof(sector_t) == sizeof(long) && | |
102 | sizeof(long long) > sizeof(long)) { | |
103 | long pstart = start, plength = length; | |
104 | if (pstart != start || plength != length | |
105 | || pstart < 0 || plength < 0) | |
106 | return -EINVAL; | |
107 | } | |
108 | part = disk_get_part(disk, partno); | |
109 | if (!part) | |
110 | return -ENXIO; | |
111 | bdevp = bdget(part_devt(part)); | |
112 | if (!bdevp) { | |
113 | disk_put_part(part); | |
114 | return -ENOMEM; | |
115 | } | |
116 | mutex_lock(&bdevp->bd_mutex); | |
117 | mutex_lock_nested(&bdev->bd_mutex, 1); | |
118 | if (start != part->start_sect) { | |
119 | mutex_unlock(&bdevp->bd_mutex); | |
120 | mutex_unlock(&bdev->bd_mutex); | |
121 | bdput(bdevp); | |
122 | disk_put_part(part); | |
123 | return -EINVAL; | |
124 | } | |
125 | /* overlap? */ | |
126 | disk_part_iter_init(&piter, disk, | |
127 | DISK_PITER_INCL_EMPTY); | |
128 | while ((lpart = disk_part_iter_next(&piter))) { | |
129 | if (lpart->partno != partno && | |
130 | !(start + length <= lpart->start_sect || | |
131 | start >= lpart->start_sect + lpart->nr_sects) | |
132 | ) { | |
133 | disk_part_iter_exit(&piter); | |
134 | mutex_unlock(&bdevp->bd_mutex); | |
135 | mutex_unlock(&bdev->bd_mutex); | |
136 | bdput(bdevp); | |
137 | disk_put_part(part); | |
138 | return -EBUSY; | |
139 | } | |
140 | } | |
141 | disk_part_iter_exit(&piter); | |
142 | part_nr_sects_write(part, (sector_t)length); | |
143 | i_size_write(bdevp->bd_inode, p.length); | |
144 | mutex_unlock(&bdevp->bd_mutex); | |
145 | mutex_unlock(&bdev->bd_mutex); | |
146 | bdput(bdevp); | |
147 | disk_put_part(part); | |
148 | return 0; | |
149 | default: | |
150 | return -EINVAL; | |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * This is an exported API for the block driver, and will not | |
156 | * acquire bd_mutex. This API should be used in case that | |
157 | * caller has held bd_mutex already. | |
158 | */ | |
159 | int __blkdev_reread_part(struct block_device *bdev) | |
160 | { | |
161 | struct gendisk *disk = bdev->bd_disk; | |
162 | ||
163 | if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains) | |
164 | return -EINVAL; | |
165 | if (!capable(CAP_SYS_ADMIN)) | |
166 | return -EACCES; | |
167 | ||
168 | lockdep_assert_held(&bdev->bd_mutex); | |
169 | ||
170 | return rescan_partitions(disk, bdev); | |
171 | } | |
172 | EXPORT_SYMBOL(__blkdev_reread_part); | |
173 | ||
174 | /* | |
175 | * This is an exported API for the block driver, and will | |
176 | * try to acquire bd_mutex. If bd_mutex has been held already | |
177 | * in current context, please call __blkdev_reread_part(). | |
178 | * | |
179 | * Make sure the held locks in current context aren't required | |
180 | * in open()/close() handler and I/O path for avoiding ABBA deadlock: | |
181 | * - bd_mutex is held before calling block driver's open/close | |
182 | * handler | |
183 | * - reading partition table may submit I/O to the block device | |
184 | */ | |
185 | int blkdev_reread_part(struct block_device *bdev) | |
186 | { | |
187 | int res; | |
188 | ||
189 | mutex_lock(&bdev->bd_mutex); | |
190 | res = __blkdev_reread_part(bdev); | |
191 | mutex_unlock(&bdev->bd_mutex); | |
192 | ||
193 | return res; | |
194 | } | |
195 | EXPORT_SYMBOL(blkdev_reread_part); | |
196 | ||
197 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, | |
198 | unsigned long arg, unsigned long flags) | |
199 | { | |
200 | uint64_t range[2]; | |
201 | uint64_t start, len; | |
202 | ||
203 | if (!(mode & FMODE_WRITE)) | |
204 | return -EBADF; | |
205 | ||
206 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
207 | return -EFAULT; | |
208 | ||
209 | start = range[0]; | |
210 | len = range[1]; | |
211 | ||
212 | if (start & 511) | |
213 | return -EINVAL; | |
214 | if (len & 511) | |
215 | return -EINVAL; | |
216 | start >>= 9; | |
217 | len >>= 9; | |
218 | ||
219 | if (start + len > (i_size_read(bdev->bd_inode) >> 9)) | |
220 | return -EINVAL; | |
221 | return blkdev_issue_discard(bdev, start, len, GFP_KERNEL, flags); | |
222 | } | |
223 | ||
224 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, | |
225 | unsigned long arg) | |
226 | { | |
227 | uint64_t range[2]; | |
228 | uint64_t start, len; | |
229 | ||
230 | if (!(mode & FMODE_WRITE)) | |
231 | return -EBADF; | |
232 | ||
233 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
234 | return -EFAULT; | |
235 | ||
236 | start = range[0]; | |
237 | len = range[1]; | |
238 | ||
239 | if (start & 511) | |
240 | return -EINVAL; | |
241 | if (len & 511) | |
242 | return -EINVAL; | |
243 | start >>= 9; | |
244 | len >>= 9; | |
245 | ||
246 | if (start + len > (i_size_read(bdev->bd_inode) >> 9)) | |
247 | return -EINVAL; | |
248 | ||
249 | return blkdev_issue_zeroout(bdev, start, len, GFP_KERNEL, false); | |
250 | } | |
251 | ||
252 | static int put_ushort(unsigned long arg, unsigned short val) | |
253 | { | |
254 | return put_user(val, (unsigned short __user *)arg); | |
255 | } | |
256 | ||
257 | static int put_int(unsigned long arg, int val) | |
258 | { | |
259 | return put_user(val, (int __user *)arg); | |
260 | } | |
261 | ||
262 | static int put_uint(unsigned long arg, unsigned int val) | |
263 | { | |
264 | return put_user(val, (unsigned int __user *)arg); | |
265 | } | |
266 | ||
267 | static int put_long(unsigned long arg, long val) | |
268 | { | |
269 | return put_user(val, (long __user *)arg); | |
270 | } | |
271 | ||
272 | static int put_ulong(unsigned long arg, unsigned long val) | |
273 | { | |
274 | return put_user(val, (unsigned long __user *)arg); | |
275 | } | |
276 | ||
277 | static int put_u64(unsigned long arg, u64 val) | |
278 | { | |
279 | return put_user(val, (u64 __user *)arg); | |
280 | } | |
281 | ||
282 | int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, | |
283 | unsigned cmd, unsigned long arg) | |
284 | { | |
285 | struct gendisk *disk = bdev->bd_disk; | |
286 | ||
287 | if (disk->fops->ioctl) | |
288 | return disk->fops->ioctl(bdev, mode, cmd, arg); | |
289 | ||
290 | return -ENOTTY; | |
291 | } | |
292 | /* | |
293 | * For the record: _GPL here is only because somebody decided to slap it | |
294 | * on the previous export. Sheer idiocy, since it wasn't copyrightable | |
295 | * at all and could be open-coded without any exports by anybody who cares. | |
296 | */ | |
297 | EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl); | |
298 | ||
299 | static int blkdev_pr_register(struct block_device *bdev, | |
300 | struct pr_registration __user *arg) | |
301 | { | |
302 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
303 | struct pr_registration reg; | |
304 | ||
305 | if (!capable(CAP_SYS_ADMIN)) | |
306 | return -EPERM; | |
307 | if (!ops || !ops->pr_register) | |
308 | return -EOPNOTSUPP; | |
309 | if (copy_from_user(®, arg, sizeof(reg))) | |
310 | return -EFAULT; | |
311 | ||
312 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
313 | return -EOPNOTSUPP; | |
314 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
315 | } | |
316 | ||
317 | static int blkdev_pr_reserve(struct block_device *bdev, | |
318 | struct pr_reservation __user *arg) | |
319 | { | |
320 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
321 | struct pr_reservation rsv; | |
322 | ||
323 | if (!capable(CAP_SYS_ADMIN)) | |
324 | return -EPERM; | |
325 | if (!ops || !ops->pr_reserve) | |
326 | return -EOPNOTSUPP; | |
327 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
328 | return -EFAULT; | |
329 | ||
330 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
331 | return -EOPNOTSUPP; | |
332 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
333 | } | |
334 | ||
335 | static int blkdev_pr_release(struct block_device *bdev, | |
336 | struct pr_reservation __user *arg) | |
337 | { | |
338 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
339 | struct pr_reservation rsv; | |
340 | ||
341 | if (!capable(CAP_SYS_ADMIN)) | |
342 | return -EPERM; | |
343 | if (!ops || !ops->pr_release) | |
344 | return -EOPNOTSUPP; | |
345 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
346 | return -EFAULT; | |
347 | ||
348 | if (rsv.flags) | |
349 | return -EOPNOTSUPP; | |
350 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
351 | } | |
352 | ||
353 | static int blkdev_pr_preempt(struct block_device *bdev, | |
354 | struct pr_preempt __user *arg, bool abort) | |
355 | { | |
356 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
357 | struct pr_preempt p; | |
358 | ||
359 | if (!capable(CAP_SYS_ADMIN)) | |
360 | return -EPERM; | |
361 | if (!ops || !ops->pr_preempt) | |
362 | return -EOPNOTSUPP; | |
363 | if (copy_from_user(&p, arg, sizeof(p))) | |
364 | return -EFAULT; | |
365 | ||
366 | if (p.flags) | |
367 | return -EOPNOTSUPP; | |
368 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
369 | } | |
370 | ||
371 | static int blkdev_pr_clear(struct block_device *bdev, | |
372 | struct pr_clear __user *arg) | |
373 | { | |
374 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
375 | struct pr_clear c; | |
376 | ||
377 | if (!capable(CAP_SYS_ADMIN)) | |
378 | return -EPERM; | |
379 | if (!ops || !ops->pr_clear) | |
380 | return -EOPNOTSUPP; | |
381 | if (copy_from_user(&c, arg, sizeof(c))) | |
382 | return -EFAULT; | |
383 | ||
384 | if (c.flags) | |
385 | return -EOPNOTSUPP; | |
386 | return ops->pr_clear(bdev, c.key); | |
387 | } | |
388 | ||
389 | /* | |
390 | * Is it an unrecognized ioctl? The correct returns are either | |
391 | * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a | |
392 | * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl | |
393 | * code before returning. | |
394 | * | |
395 | * Confused drivers sometimes return EINVAL, which is wrong. It | |
396 | * means "I understood the ioctl command, but the parameters to | |
397 | * it were wrong". | |
398 | * | |
399 | * We should aim to just fix the broken drivers, the EINVAL case | |
400 | * should go away. | |
401 | */ | |
402 | static inline int is_unrecognized_ioctl(int ret) | |
403 | { | |
404 | return ret == -EINVAL || | |
405 | ret == -ENOTTY || | |
406 | ret == -ENOIOCTLCMD; | |
407 | } | |
408 | ||
409 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, | |
410 | unsigned cmd, unsigned long arg) | |
411 | { | |
412 | int ret; | |
413 | ||
414 | if (!capable(CAP_SYS_ADMIN)) | |
415 | return -EACCES; | |
416 | ||
417 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); | |
418 | if (!is_unrecognized_ioctl(ret)) | |
419 | return ret; | |
420 | ||
421 | fsync_bdev(bdev); | |
422 | invalidate_bdev(bdev); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, | |
427 | unsigned cmd, unsigned long arg) | |
428 | { | |
429 | int ret, n; | |
430 | ||
431 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); | |
432 | if (!is_unrecognized_ioctl(ret)) | |
433 | return ret; | |
434 | if (!capable(CAP_SYS_ADMIN)) | |
435 | return -EACCES; | |
436 | if (get_user(n, (int __user *)arg)) | |
437 | return -EFAULT; | |
438 | set_device_ro(bdev, n); | |
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 | /* set the logical block size */ | |
469 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
470 | int __user *argp) | |
471 | { | |
472 | int ret, n; | |
473 | ||
474 | if (!capable(CAP_SYS_ADMIN)) | |
475 | return -EACCES; | |
476 | if (!argp) | |
477 | return -EINVAL; | |
478 | if (get_user(n, argp)) | |
479 | return -EFAULT; | |
480 | ||
481 | if (!(mode & FMODE_EXCL)) { | |
482 | bdgrab(bdev); | |
483 | if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0) | |
484 | return -EBUSY; | |
485 | } | |
486 | ||
487 | ret = set_blocksize(bdev, n); | |
488 | if (!(mode & FMODE_EXCL)) | |
489 | blkdev_put(bdev, mode | FMODE_EXCL); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | /* | |
494 | * always keep this in sync with compat_blkdev_ioctl() | |
495 | */ | |
496 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
497 | unsigned long arg) | |
498 | { | |
499 | struct backing_dev_info *bdi; | |
500 | void __user *argp = (void __user *)arg; | |
501 | loff_t size; | |
502 | unsigned int max_sectors; | |
503 | ||
504 | switch (cmd) { | |
505 | case BLKFLSBUF: | |
506 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
507 | case BLKROSET: | |
508 | return blkdev_roset(bdev, mode, cmd, arg); | |
509 | case BLKDISCARD: | |
510 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
511 | case BLKSECDISCARD: | |
512 | return blk_ioctl_discard(bdev, mode, arg, | |
513 | BLKDEV_DISCARD_SECURE); | |
514 | case BLKZEROOUT: | |
515 | return blk_ioctl_zeroout(bdev, mode, arg); | |
516 | case HDIO_GETGEO: | |
517 | return blkdev_getgeo(bdev, argp); | |
518 | case BLKRAGET: | |
519 | case BLKFRAGET: | |
520 | if (!arg) | |
521 | return -EINVAL; | |
522 | bdi = blk_get_backing_dev_info(bdev); | |
523 | return put_long(arg, (bdi->ra_pages * PAGE_SIZE) / 512); | |
524 | case BLKROGET: | |
525 | return put_int(arg, bdev_read_only(bdev) != 0); | |
526 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
527 | return put_int(arg, block_size(bdev)); | |
528 | case BLKSSZGET: /* get block device logical block size */ | |
529 | return put_int(arg, bdev_logical_block_size(bdev)); | |
530 | case BLKPBSZGET: /* get block device physical block size */ | |
531 | return put_uint(arg, bdev_physical_block_size(bdev)); | |
532 | case BLKIOMIN: | |
533 | return put_uint(arg, bdev_io_min(bdev)); | |
534 | case BLKIOOPT: | |
535 | return put_uint(arg, bdev_io_opt(bdev)); | |
536 | case BLKALIGNOFF: | |
537 | return put_int(arg, bdev_alignment_offset(bdev)); | |
538 | case BLKDISCARDZEROES: | |
539 | return put_uint(arg, bdev_discard_zeroes_data(bdev)); | |
540 | case BLKSECTGET: | |
541 | max_sectors = min_t(unsigned int, USHRT_MAX, | |
542 | queue_max_sectors(bdev_get_queue(bdev))); | |
543 | return put_ushort(arg, max_sectors); | |
544 | case BLKROTATIONAL: | |
545 | return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev))); | |
546 | case BLKRASET: | |
547 | case BLKFRASET: | |
548 | if(!capable(CAP_SYS_ADMIN)) | |
549 | return -EACCES; | |
550 | bdi = blk_get_backing_dev_info(bdev); | |
551 | bdi->ra_pages = (arg * 512) / PAGE_SIZE; | |
552 | return 0; | |
553 | case BLKBSZSET: | |
554 | return blkdev_bszset(bdev, mode, argp); | |
555 | case BLKPG: | |
556 | return blkpg_ioctl(bdev, argp); | |
557 | case BLKRRPART: | |
558 | return blkdev_reread_part(bdev); | |
559 | case BLKGETSIZE: | |
560 | size = i_size_read(bdev->bd_inode); | |
561 | if ((size >> 9) > ~0UL) | |
562 | return -EFBIG; | |
563 | return put_ulong(arg, size >> 9); | |
564 | case BLKGETSIZE64: | |
565 | return put_u64(arg, i_size_read(bdev->bd_inode)); | |
566 | case BLKTRACESTART: | |
567 | case BLKTRACESTOP: | |
568 | case BLKTRACESETUP: | |
569 | case BLKTRACETEARDOWN: | |
570 | return blk_trace_ioctl(bdev, cmd, argp); | |
571 | case IOC_PR_REGISTER: | |
572 | return blkdev_pr_register(bdev, argp); | |
573 | case IOC_PR_RESERVE: | |
574 | return blkdev_pr_reserve(bdev, argp); | |
575 | case IOC_PR_RELEASE: | |
576 | return blkdev_pr_release(bdev, argp); | |
577 | case IOC_PR_PREEMPT: | |
578 | return blkdev_pr_preempt(bdev, argp, false); | |
579 | case IOC_PR_PREEMPT_ABORT: | |
580 | return blkdev_pr_preempt(bdev, argp, true); | |
581 | case IOC_PR_CLEAR: | |
582 | return blkdev_pr_clear(bdev, argp); | |
583 | default: | |
584 | return __blkdev_driver_ioctl(bdev, mode, cmd, arg); | |
585 | } | |
586 | } | |
587 | EXPORT_SYMBOL_GPL(blkdev_ioctl); |