blob: 5de98b97af2a0c7b4db99ea6ed72c8081edd5cce [file] [log] [blame]
Christoph Hellwig3dcf60bc2019-04-30 14:42:43 -04001// SPDX-License-Identifier: GPL-2.0
Randy.Dunlapc59ede72006-01-11 12:17:46 -08002#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#include <linux/blkdev.h>
Paul Gortmakerd5decd32011-05-26 16:00:52 -04004#include <linux/export.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09005#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/blkpg.h>
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08007#include <linux/hdreg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/backing-dev.h>
Al Viroff01bb42011-09-16 02:31:11 -04009#include <linux/fs.h>
Jens Axboe2056a782006-03-23 20:00:26 +010010#include <linux/blktrace_api.h>
Christoph Hellwigbbd3e062015-10-15 14:10:48 +020011#include <linux/pr.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080012#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
15{
16 struct block_device *bdevp;
17 struct gendisk *disk;
Vivek Goyalc83f6bf2012-08-01 12:24:18 +020018 struct hd_struct *part, *lpart;
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 struct blkpg_ioctl_arg a;
20 struct blkpg_partition p;
Tejun Heoe71bf0d2008-09-03 09:03:02 +020021 struct disk_part_iter piter;
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 long long start, length;
Tejun Heocf771cb2008-09-03 09:01:09 +020023 int partno;
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25 if (!capable(CAP_SYS_ADMIN))
26 return -EACCES;
27 if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
28 return -EFAULT;
29 if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
30 return -EFAULT;
31 disk = bdev->bd_disk;
32 if (bdev != bdev->bd_contains)
33 return -EINVAL;
Tejun Heocf771cb2008-09-03 09:01:09 +020034 partno = p.pno;
Tejun Heo540eed52008-08-25 19:56:15 +090035 if (partno <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 return -EINVAL;
37 switch (a.op) {
38 case BLKPG_ADD_PARTITION:
39 start = p.start >> 9;
40 length = p.length >> 9;
Vivek Goyalc83f6bf2012-08-01 12:24:18 +020041 /* check for fit in a hd_struct */
42 if (sizeof(sector_t) == sizeof(long) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 sizeof(long long) > sizeof(long)) {
44 long pstart = start, plength = length;
45 if (pstart != start || plength != length
Alan Cox2bd6efa2012-09-17 11:47:13 +010046 || pstart < 0 || plength < 0 || partno > 65535)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 return -EINVAL;
48 }
Stefan Haberland633395b2016-12-19 17:15:50 +010049 /* check if partition is aligned to blocksize */
50 if (p.start & (bdev_logical_block_size(bdev) - 1))
51 return -EINVAL;
Tejun Heo88e34122008-08-25 19:30:16 +090052
Arjan van de Venc039e312006-03-23 03:00:28 -080053 mutex_lock(&bdev->bd_mutex);
Tejun Heo88e34122008-08-25 19:30:16 +090054
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 /* overlap? */
Tejun Heoe71bf0d2008-09-03 09:03:02 +020056 disk_part_iter_init(&piter, disk,
57 DISK_PITER_INCL_EMPTY);
58 while ((part = disk_part_iter_next(&piter))) {
59 if (!(start + length <= part->start_sect ||
60 start >= part->start_sect + part->nr_sects)) {
61 disk_part_iter_exit(&piter);
Arjan van de Venc039e312006-03-23 03:00:28 -080062 mutex_unlock(&bdev->bd_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 return -EBUSY;
64 }
65 }
Tejun Heoe71bf0d2008-09-03 09:03:02 +020066 disk_part_iter_exit(&piter);
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 /* all seems OK */
Tejun Heoba329292008-11-10 15:29:58 +090069 part = add_partition(disk, partno, start, length,
Will Drewry6d1d8052010-08-31 15:47:05 -050070 ADDPART_FLAG_NONE, NULL);
Arjan van de Venc039e312006-03-23 03:00:28 -080071 mutex_unlock(&bdev->bd_mutex);
Duan Jiongc7d1ba42013-11-06 15:56:39 +080072 return PTR_ERR_OR_ZERO(part);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 case BLKPG_DEL_PARTITION:
Tejun Heoe71bf0d2008-09-03 09:03:02 +020074 part = disk_get_part(disk, partno);
75 if (!part)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 return -ENXIO;
Tejun Heoe71bf0d2008-09-03 09:03:02 +020077
78 bdevp = bdget(part_devt(part));
79 disk_put_part(part);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (!bdevp)
81 return -ENOMEM;
Tejun Heoe71bf0d2008-09-03 09:03:02 +020082
Peter Zijlstra2e7b6512006-12-08 02:36:13 -080083 mutex_lock(&bdevp->bd_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 if (bdevp->bd_openers) {
Arjan van de Venc039e312006-03-23 03:00:28 -080085 mutex_unlock(&bdevp->bd_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 bdput(bdevp);
87 return -EBUSY;
88 }
89 /* all seems OK */
90 fsync_bdev(bdevp);
Peter Zijlstraf98393a2007-05-06 14:49:54 -070091 invalidate_bdev(bdevp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Peter Zijlstra6d740cd2007-02-20 13:58:18 -080093 mutex_lock_nested(&bdev->bd_mutex, 1);
Tejun Heocf771cb2008-09-03 09:01:09 +020094 delete_partition(disk, partno);
Arjan van de Venc039e312006-03-23 03:00:28 -080095 mutex_unlock(&bdev->bd_mutex);
96 mutex_unlock(&bdevp->bd_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 bdput(bdevp);
98
99 return 0;
Vivek Goyalc83f6bf2012-08-01 12:24:18 +0200100 case BLKPG_RESIZE_PARTITION:
101 start = p.start >> 9;
102 /* new length of partition in bytes */
103 length = p.length >> 9;
104 /* check for fit in a hd_struct */
105 if (sizeof(sector_t) == sizeof(long) &&
106 sizeof(long long) > sizeof(long)) {
107 long pstart = start, plength = length;
108 if (pstart != start || plength != length
109 || pstart < 0 || plength < 0)
110 return -EINVAL;
111 }
112 part = disk_get_part(disk, partno);
113 if (!part)
114 return -ENXIO;
115 bdevp = bdget(part_devt(part));
116 if (!bdevp) {
117 disk_put_part(part);
118 return -ENOMEM;
119 }
120 mutex_lock(&bdevp->bd_mutex);
121 mutex_lock_nested(&bdev->bd_mutex, 1);
122 if (start != part->start_sect) {
123 mutex_unlock(&bdevp->bd_mutex);
124 mutex_unlock(&bdev->bd_mutex);
125 bdput(bdevp);
126 disk_put_part(part);
127 return -EINVAL;
128 }
129 /* overlap? */
130 disk_part_iter_init(&piter, disk,
131 DISK_PITER_INCL_EMPTY);
132 while ((lpart = disk_part_iter_next(&piter))) {
133 if (lpart->partno != partno &&
134 !(start + length <= lpart->start_sect ||
135 start >= lpart->start_sect + lpart->nr_sects)
136 ) {
137 disk_part_iter_exit(&piter);
138 mutex_unlock(&bdevp->bd_mutex);
139 mutex_unlock(&bdev->bd_mutex);
140 bdput(bdevp);
141 disk_put_part(part);
142 return -EBUSY;
143 }
144 }
145 disk_part_iter_exit(&piter);
146 part_nr_sects_write(part, (sector_t)length);
147 i_size_write(bdevp->bd_inode, p.length);
148 mutex_unlock(&bdevp->bd_mutex);
149 mutex_unlock(&bdev->bd_mutex);
150 bdput(bdevp);
151 disk_put_part(part);
152 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 default:
154 return -EINVAL;
155 }
156}
157
Christoph Hellwigf0b870d2019-11-14 15:34:36 +0100158static int blkdev_reread_part(struct block_device *bdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
Christoph Hellwigf0b870d2019-11-14 15:34:36 +0100160 int ret;
161
Christoph Hellwig142fe8f2019-11-14 15:34:35 +0100162 if (!disk_part_scan_enabled(bdev->bd_disk) || bdev != bdev->bd_contains)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return -EINVAL;
164 if (!capable(CAP_SYS_ADMIN))
165 return -EACCES;
Jarod Wilsonbe324172015-05-06 12:26:22 +0800166
Ming Leib04a56362015-05-06 12:26:27 +0800167 mutex_lock(&bdev->bd_mutex);
Christoph Hellwigf0b870d2019-11-14 15:34:36 +0100168 ret = bdev_disk_changed(bdev, false);
Arjan van de Venc039e312006-03-23 03:00:28 -0800169 mutex_unlock(&bdev->bd_mutex);
Jarod Wilsonbe324172015-05-06 12:26:22 +0800170
Christoph Hellwigf0b870d2019-11-14 15:34:36 +0100171 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172}
173
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200174static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
175 unsigned long arg, unsigned long flags)
David Woodhoused30a2602008-08-11 15:58:42 +0100176{
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200177 uint64_t range[2];
178 uint64_t start, len;
Dmitry Monakhov351499a12017-10-24 18:44:57 -0600179 struct request_queue *q = bdev_get_queue(bdev);
180 struct address_space *mapping = bdev->bd_inode->i_mapping;
181
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200182
183 if (!(mode & FMODE_WRITE))
184 return -EBADF;
185
Dmitry Monakhov351499a12017-10-24 18:44:57 -0600186 if (!blk_queue_discard(q))
187 return -EOPNOTSUPP;
188
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200189 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
190 return -EFAULT;
191
192 start = range[0];
193 len = range[1];
Adrian Hunter8d57a982010-08-11 14:17:49 -0700194
David Woodhoused30a2602008-08-11 15:58:42 +0100195 if (start & 511)
196 return -EINVAL;
197 if (len & 511)
198 return -EINVAL;
David Woodhoused30a2602008-08-11 15:58:42 +0100199
Dmitry Monakhov351499a12017-10-24 18:44:57 -0600200 if (start + len > i_size_read(bdev->bd_inode))
David Woodhoused30a2602008-08-11 15:58:42 +0100201 return -EINVAL;
Ming Lei0bd1ed42018-02-10 08:46:17 +0800202 truncate_inode_pages_range(mapping, start, start + len - 1);
Dmitry Monakhov351499a12017-10-24 18:44:57 -0600203 return blkdev_issue_discard(bdev, start >> 9, len >> 9,
204 GFP_KERNEL, flags);
David Woodhoused30a2602008-08-11 15:58:42 +0100205}
206
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200207static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
208 unsigned long arg)
Martin K. Petersen66ba32d2012-09-18 12:19:29 -0400209{
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200210 uint64_t range[2];
Darrick J. Wong22dd6d352016-10-11 13:51:05 -0700211 struct address_space *mapping;
212 uint64_t start, end, len;
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200213
214 if (!(mode & FMODE_WRITE))
215 return -EBADF;
216
217 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
218 return -EFAULT;
219
220 start = range[0];
221 len = range[1];
Darrick J. Wong22dd6d352016-10-11 13:51:05 -0700222 end = start + len - 1;
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200223
Martin K. Petersen66ba32d2012-09-18 12:19:29 -0400224 if (start & 511)
225 return -EINVAL;
226 if (len & 511)
227 return -EINVAL;
Darrick J. Wong22dd6d352016-10-11 13:51:05 -0700228 if (end >= (uint64_t)i_size_read(bdev->bd_inode))
229 return -EINVAL;
230 if (end < start)
Martin K. Petersen66ba32d2012-09-18 12:19:29 -0400231 return -EINVAL;
232
Darrick J. Wong22dd6d352016-10-11 13:51:05 -0700233 /* Invalidate the page cache, including dirty pages */
234 mapping = bdev->bd_inode->i_mapping;
235 truncate_inode_pages_range(mapping, start, end);
236
237 return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
Christoph Hellwigee472d82017-04-05 19:21:08 +0200238 BLKDEV_ZERO_NOUNMAP);
Martin K. Petersen66ba32d2012-09-18 12:19:29 -0400239}
240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241static int put_ushort(unsigned long arg, unsigned short val)
242{
243 return put_user(val, (unsigned short __user *)arg);
244}
245
246static int put_int(unsigned long arg, int val)
247{
248 return put_user(val, (int __user *)arg);
249}
250
Martin K. Petersenac481c22009-10-03 20:52:01 +0200251static int put_uint(unsigned long arg, unsigned int val)
252{
253 return put_user(val, (unsigned int __user *)arg);
254}
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static int put_long(unsigned long arg, long val)
257{
258 return put_user(val, (long __user *)arg);
259}
260
261static int put_ulong(unsigned long arg, unsigned long val)
262{
263 return put_user(val, (unsigned long __user *)arg);
264}
265
266static int put_u64(unsigned long arg, u64 val)
267{
268 return put_user(val, (u64 __user *)arg);
269}
270
Al Viro633a08b2007-08-29 20:34:12 -0400271int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
272 unsigned cmd, unsigned long arg)
273{
274 struct gendisk *disk = bdev->bd_disk;
Al Virod4430d62008-03-02 09:09:22 -0500275
276 if (disk->fops->ioctl)
277 return disk->fops->ioctl(bdev, mode, cmd, arg);
278
Al Viro633a08b2007-08-29 20:34:12 -0400279 return -ENOTTY;
280}
281/*
282 * For the record: _GPL here is only because somebody decided to slap it
283 * on the previous export. Sheer idiocy, since it wasn't copyrightable
284 * at all and could be open-coded without any exports by anybody who cares.
285 */
286EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
287
Christoph Hellwigbbd3e062015-10-15 14:10:48 +0200288static int blkdev_pr_register(struct block_device *bdev,
289 struct pr_registration __user *arg)
290{
291 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
292 struct pr_registration reg;
293
294 if (!capable(CAP_SYS_ADMIN))
295 return -EPERM;
296 if (!ops || !ops->pr_register)
297 return -EOPNOTSUPP;
298 if (copy_from_user(&reg, arg, sizeof(reg)))
299 return -EFAULT;
300
301 if (reg.flags & ~PR_FL_IGNORE_KEY)
302 return -EOPNOTSUPP;
303 return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
304}
305
306static int blkdev_pr_reserve(struct block_device *bdev,
307 struct pr_reservation __user *arg)
308{
309 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
310 struct pr_reservation rsv;
311
312 if (!capable(CAP_SYS_ADMIN))
313 return -EPERM;
314 if (!ops || !ops->pr_reserve)
315 return -EOPNOTSUPP;
316 if (copy_from_user(&rsv, arg, sizeof(rsv)))
317 return -EFAULT;
318
319 if (rsv.flags & ~PR_FL_IGNORE_KEY)
320 return -EOPNOTSUPP;
321 return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
322}
323
324static int blkdev_pr_release(struct block_device *bdev,
325 struct pr_reservation __user *arg)
326{
327 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
328 struct pr_reservation rsv;
329
330 if (!capable(CAP_SYS_ADMIN))
331 return -EPERM;
332 if (!ops || !ops->pr_release)
333 return -EOPNOTSUPP;
334 if (copy_from_user(&rsv, arg, sizeof(rsv)))
335 return -EFAULT;
336
337 if (rsv.flags)
338 return -EOPNOTSUPP;
339 return ops->pr_release(bdev, rsv.key, rsv.type);
340}
341
342static int blkdev_pr_preempt(struct block_device *bdev,
343 struct pr_preempt __user *arg, bool abort)
344{
345 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
346 struct pr_preempt p;
347
348 if (!capable(CAP_SYS_ADMIN))
349 return -EPERM;
350 if (!ops || !ops->pr_preempt)
351 return -EOPNOTSUPP;
352 if (copy_from_user(&p, arg, sizeof(p)))
353 return -EFAULT;
354
355 if (p.flags)
356 return -EOPNOTSUPP;
357 return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
358}
359
360static int blkdev_pr_clear(struct block_device *bdev,
361 struct pr_clear __user *arg)
362{
363 const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
364 struct pr_clear c;
365
366 if (!capable(CAP_SYS_ADMIN))
367 return -EPERM;
368 if (!ops || !ops->pr_clear)
369 return -EOPNOTSUPP;
370 if (copy_from_user(&c, arg, sizeof(c)))
371 return -EFAULT;
372
373 if (c.flags)
374 return -EOPNOTSUPP;
375 return ops->pr_clear(bdev, c.key);
376}
377
Arnd Bergmannf58c4c02007-10-09 13:23:51 +0200378/*
Linus Torvalds07d106d2012-01-05 15:40:12 -0800379 * Is it an unrecognized ioctl? The correct returns are either
380 * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a
381 * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl
382 * code before returning.
383 *
384 * Confused drivers sometimes return EINVAL, which is wrong. It
385 * means "I understood the ioctl command, but the parameters to
386 * it were wrong".
387 *
388 * We should aim to just fix the broken drivers, the EINVAL case
389 * should go away.
390 */
391static inline int is_unrecognized_ioctl(int ret)
392{
393 return ret == -EINVAL ||
394 ret == -ENOTTY ||
395 ret == -ENOIOCTLCMD;
396}
397
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200398static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
399 unsigned cmd, unsigned long arg)
400{
401 int ret;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -EACCES;
405
406 ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
407 if (!is_unrecognized_ioctl(ret))
408 return ret;
409
410 fsync_bdev(bdev);
411 invalidate_bdev(bdev);
412 return 0;
413}
414
415static int blkdev_roset(struct block_device *bdev, fmode_t mode,
416 unsigned cmd, unsigned long arg)
417{
418 int ret, n;
419
Ilya Dryomovbb749b32017-10-18 14:38:38 +0200420 if (!capable(CAP_SYS_ADMIN))
421 return -EACCES;
422
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200423 ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
424 if (!is_unrecognized_ioctl(ret))
425 return ret;
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200426 if (get_user(n, (int __user *)arg))
427 return -EFAULT;
428 set_device_ro(bdev, n);
429 return 0;
430}
431
432static int blkdev_getgeo(struct block_device *bdev,
433 struct hd_geometry __user *argp)
434{
435 struct gendisk *disk = bdev->bd_disk;
436 struct hd_geometry geo;
437 int ret;
438
439 if (!argp)
440 return -EINVAL;
441 if (!disk->fops->getgeo)
442 return -ENOTTY;
443
444 /*
445 * We need to set the startsect first, the driver may
446 * want to override it.
447 */
448 memset(&geo, 0, sizeof(geo));
449 geo.start = get_start_sect(bdev);
450 ret = disk->fops->getgeo(bdev, &geo);
451 if (ret)
452 return ret;
453 if (copy_to_user(argp, &geo, sizeof(geo)))
454 return -EFAULT;
455 return 0;
456}
457
458/* set the logical block size */
459static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
460 int __user *argp)
461{
462 int ret, n;
463
464 if (!capable(CAP_SYS_ADMIN))
465 return -EACCES;
466 if (!argp)
467 return -EINVAL;
468 if (get_user(n, argp))
469 return -EFAULT;
470
471 if (!(mode & FMODE_EXCL)) {
472 bdgrab(bdev);
473 if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0)
474 return -EBUSY;
475 }
476
477 ret = set_blocksize(bdev, n);
478 if (!(mode & FMODE_EXCL))
479 blkdev_put(bdev, mode | FMODE_EXCL);
480 return ret;
481}
482
Linus Torvalds07d106d2012-01-05 15:40:12 -0800483/*
Arnd Bergmann8a6cfeb2010-07-08 10:18:46 +0200484 * always keep this in sync with compat_blkdev_ioctl()
Arnd Bergmannf58c4c02007-10-09 13:23:51 +0200485 */
Al Viro56b26ad2008-09-19 03:17:36 -0400486int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
Arnd Bergmannbb93e3a2005-06-23 00:10:15 -0700487 unsigned long arg)
488{
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200489 void __user *argp = (void __user *)arg;
Al Viro45048d02008-09-18 15:53:24 -0400490 loff_t size;
Akinobu Mita63f26492014-05-25 21:43:33 +0900491 unsigned int max_sectors;
Arnd Bergmannbb93e3a2005-06-23 00:10:15 -0700492
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200493 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 case BLKFLSBUF:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200495 return blkdev_flushbuf(bdev, mode, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 case BLKROSET:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200497 return blkdev_roset(bdev, mode, cmd, arg);
Adrian Hunter8d57a982010-08-11 14:17:49 -0700498 case BLKDISCARD:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200499 return blk_ioctl_discard(bdev, mode, arg, 0);
500 case BLKSECDISCARD:
501 return blk_ioctl_discard(bdev, mode, arg,
502 BLKDEV_DISCARD_SECURE);
503 case BLKZEROOUT:
504 return blk_ioctl_zeroout(bdev, mode, arg);
Shaun Tancheff3ed05a92016-10-18 15:40:35 +0900505 case BLKREPORTZONE:
506 return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
507 case BLKRESETZONE:
Ajay Joshie876df12019-10-27 23:05:46 +0900508 case BLKOPENZONE:
509 case BLKCLOSEZONE:
510 case BLKFINISHZONE:
511 return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
Damien Le Moal72cd8752018-10-12 19:08:45 +0900512 case BLKGETZONESZ:
513 return put_uint(arg, bdev_zone_sectors(bdev));
Damien Le Moal65e4e3e2018-10-12 19:08:46 +0900514 case BLKGETNRZONES:
Christoph Hellwig9b38bb42019-12-03 10:39:04 +0100515 return put_uint(arg, blkdev_nr_zones(bdev->bd_disk));
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200516 case HDIO_GETGEO:
517 return blkdev_getgeo(bdev, argp);
Al Viro45048d02008-09-18 15:53:24 -0400518 case BLKRAGET:
519 case BLKFRAGET:
520 if (!arg)
521 return -EINVAL;
Jan Karaefa7c9f2017-02-02 15:56:53 +0100522 return put_long(arg, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
Al Viro45048d02008-09-18 15:53:24 -0400523 case BLKROGET:
524 return put_int(arg, bdev_read_only(bdev) != 0);
Martin K. Petersenac481c22009-10-03 20:52:01 +0200525 case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
Al Viro45048d02008-09-18 15:53:24 -0400526 return put_int(arg, block_size(bdev));
Martin K. Petersenac481c22009-10-03 20:52:01 +0200527 case BLKSSZGET: /* get block device logical block size */
Martin K. Petersene1defc42009-05-22 17:17:49 -0400528 return put_int(arg, bdev_logical_block_size(bdev));
Martin K. Petersenac481c22009-10-03 20:52:01 +0200529 case BLKPBSZGET: /* get block device physical block size */
530 return put_uint(arg, bdev_physical_block_size(bdev));
531 case BLKIOMIN:
532 return put_uint(arg, bdev_io_min(bdev));
533 case BLKIOOPT:
534 return put_uint(arg, bdev_io_opt(bdev));
535 case BLKALIGNOFF:
536 return put_int(arg, bdev_alignment_offset(bdev));
Martin K. Petersen98262f22009-12-03 09:24:48 +0100537 case BLKDISCARDZEROES:
Christoph Hellwig48920ff2017-04-05 19:21:23 +0200538 return put_uint(arg, 0);
Al Viro45048d02008-09-18 15:53:24 -0400539 case BLKSECTGET:
Akinobu Mita63f26492014-05-25 21:43:33 +0900540 max_sectors = min_t(unsigned int, USHRT_MAX,
541 queue_max_sectors(bdev_get_queue(bdev)));
542 return put_ushort(arg, max_sectors);
Martin K. Petersenef00f592012-01-11 16:29:31 +0100543 case BLKROTATIONAL:
544 return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev)));
Al Viro45048d02008-09-18 15:53:24 -0400545 case BLKRASET:
546 case BLKFRASET:
547 if(!capable(CAP_SYS_ADMIN))
548 return -EACCES;
Jan Karaefa7c9f2017-02-02 15:56:53 +0100549 bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
Al Viro45048d02008-09-18 15:53:24 -0400550 return 0;
551 case BLKBSZSET:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200552 return blkdev_bszset(bdev, mode, argp);
Al Viro45048d02008-09-18 15:53:24 -0400553 case BLKPG:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200554 return blkpg_ioctl(bdev, argp);
Al Viro45048d02008-09-18 15:53:24 -0400555 case BLKRRPART:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200556 return blkdev_reread_part(bdev);
Al Viro45048d02008-09-18 15:53:24 -0400557 case BLKGETSIZE:
Mike Snitzer77304d22010-11-08 14:39:12 +0100558 size = i_size_read(bdev->bd_inode);
Al Viro45048d02008-09-18 15:53:24 -0400559 if ((size >> 9) > ~0UL)
560 return -EFBIG;
561 return put_ulong(arg, size >> 9);
562 case BLKGETSIZE64:
Mike Snitzer77304d22010-11-08 14:39:12 +0100563 return put_u64(arg, i_size_read(bdev->bd_inode));
Al Viro45048d02008-09-18 15:53:24 -0400564 case BLKTRACESTART:
565 case BLKTRACESTOP:
566 case BLKTRACESETUP:
567 case BLKTRACETEARDOWN:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200568 return blk_trace_ioctl(bdev, cmd, argp);
Christoph Hellwigbbd3e062015-10-15 14:10:48 +0200569 case IOC_PR_REGISTER:
570 return blkdev_pr_register(bdev, argp);
571 case IOC_PR_RESERVE:
572 return blkdev_pr_reserve(bdev, argp);
573 case IOC_PR_RELEASE:
574 return blkdev_pr_release(bdev, argp);
575 case IOC_PR_PREEMPT:
576 return blkdev_pr_preempt(bdev, argp, false);
577 case IOC_PR_PREEMPT_ABORT:
578 return blkdev_pr_preempt(bdev, argp, true);
579 case IOC_PR_CLEAR:
580 return blkdev_pr_clear(bdev, argp);
Al Viro45048d02008-09-18 15:53:24 -0400581 default:
Christoph Hellwigd8e4bb8102015-10-15 14:10:47 +0200582 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
Al Viro45048d02008-09-18 15:53:24 -0400583 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
Stephen Tweedie68f66feb2005-05-13 23:31:19 -0400585EXPORT_SYMBOL_GPL(blkdev_ioctl);