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3dcf60bc | 1 | // SPDX-License-Identifier: GPL-2.0 |
c59ede7b | 2 | #include <linux/capability.h> |
1da177e4 | 3 | #include <linux/blkdev.h> |
d5decd3b | 4 | #include <linux/export.h> |
5a0e3ad6 | 5 | #include <linux/gfp.h> |
1da177e4 | 6 | #include <linux/blkpg.h> |
a885c8c4 | 7 | #include <linux/hdreg.h> |
1da177e4 | 8 | #include <linux/backing-dev.h> |
ff01bb48 | 9 | #include <linux/fs.h> |
2056a782 | 10 | #include <linux/blktrace_api.h> |
bbd3e064 | 11 | #include <linux/pr.h> |
7c0f6ba6 | 12 | #include <linux/uaccess.h> |
1da177e4 LT |
13 | |
14 | static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg) | |
15 | { | |
16 | struct block_device *bdevp; | |
17 | struct gendisk *disk; | |
c83f6bf9 | 18 | struct hd_struct *part, *lpart; |
1da177e4 LT |
19 | struct blkpg_ioctl_arg a; |
20 | struct blkpg_partition p; | |
e71bf0d0 | 21 | struct disk_part_iter piter; |
1da177e4 | 22 | long long start, length; |
cf771cb5 | 23 | int partno; |
1da177e4 LT |
24 | |
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; | |
cf771cb5 | 34 | partno = p.pno; |
540eed56 | 35 | if (partno <= 0) |
1da177e4 LT |
36 | return -EINVAL; |
37 | switch (a.op) { | |
38 | case BLKPG_ADD_PARTITION: | |
39 | start = p.start >> 9; | |
40 | length = p.length >> 9; | |
c83f6bf9 VG |
41 | /* check for fit in a hd_struct */ |
42 | if (sizeof(sector_t) == sizeof(long) && | |
1da177e4 LT |
43 | sizeof(long long) > sizeof(long)) { |
44 | long pstart = start, plength = length; | |
45 | if (pstart != start || plength != length | |
2bd6efad | 46 | || pstart < 0 || plength < 0 || partno > 65535) |
1da177e4 LT |
47 | return -EINVAL; |
48 | } | |
633395b6 SH |
49 | /* check if partition is aligned to blocksize */ |
50 | if (p.start & (bdev_logical_block_size(bdev) - 1)) | |
51 | return -EINVAL; | |
88e34126 | 52 | |
c039e313 | 53 | mutex_lock(&bdev->bd_mutex); |
88e34126 | 54 | |
1da177e4 | 55 | /* overlap? */ |
e71bf0d0 TH |
56 | 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); | |
c039e313 | 62 | mutex_unlock(&bdev->bd_mutex); |
1da177e4 LT |
63 | return -EBUSY; |
64 | } | |
65 | } | |
e71bf0d0 TH |
66 | disk_part_iter_exit(&piter); |
67 | ||
1da177e4 | 68 | /* all seems OK */ |
ba32929a | 69 | part = add_partition(disk, partno, start, length, |
6d1d8050 | 70 | ADDPART_FLAG_NONE, NULL); |
c039e313 | 71 | mutex_unlock(&bdev->bd_mutex); |
c7d1ba41 | 72 | return PTR_ERR_OR_ZERO(part); |
1da177e4 | 73 | case BLKPG_DEL_PARTITION: |
e71bf0d0 TH |
74 | part = disk_get_part(disk, partno); |
75 | if (!part) | |
1da177e4 | 76 | return -ENXIO; |
e71bf0d0 TH |
77 | |
78 | bdevp = bdget(part_devt(part)); | |
79 | disk_put_part(part); | |
1da177e4 LT |
80 | if (!bdevp) |
81 | return -ENOMEM; | |
e71bf0d0 | 82 | |
2e7b651d | 83 | mutex_lock(&bdevp->bd_mutex); |
1da177e4 | 84 | if (bdevp->bd_openers) { |
c039e313 | 85 | mutex_unlock(&bdevp->bd_mutex); |
1da177e4 LT |
86 | bdput(bdevp); |
87 | return -EBUSY; | |
88 | } | |
89 | /* all seems OK */ | |
90 | fsync_bdev(bdevp); | |
f98393a6 | 91 | invalidate_bdev(bdevp); |
1da177e4 | 92 | |
6d740cd5 | 93 | mutex_lock_nested(&bdev->bd_mutex, 1); |
cf771cb5 | 94 | delete_partition(disk, partno); |
c039e313 AV |
95 | mutex_unlock(&bdev->bd_mutex); |
96 | mutex_unlock(&bdevp->bd_mutex); | |
1da177e4 LT |
97 | bdput(bdevp); |
98 | ||
c83f6bf9 VG |
99 | return 0; |
100 | 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); | |
1da177e4 LT |
152 | return 0; |
153 | default: | |
154 | return -EINVAL; | |
155 | } | |
156 | } | |
157 | ||
be324177 JW |
158 | /* |
159 | * This is an exported API for the block driver, and will not | |
160 | * acquire bd_mutex. This API should be used in case that | |
161 | * caller has held bd_mutex already. | |
162 | */ | |
163 | int __blkdev_reread_part(struct block_device *bdev) | |
1da177e4 LT |
164 | { |
165 | struct gendisk *disk = bdev->bd_disk; | |
1da177e4 | 166 | |
d27769ec | 167 | if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains) |
1da177e4 LT |
168 | return -EINVAL; |
169 | if (!capable(CAP_SYS_ADMIN)) | |
170 | return -EACCES; | |
be324177 JW |
171 | |
172 | lockdep_assert_held(&bdev->bd_mutex); | |
173 | ||
174 | return rescan_partitions(disk, bdev); | |
175 | } | |
176 | EXPORT_SYMBOL(__blkdev_reread_part); | |
177 | ||
178 | /* | |
179 | * This is an exported API for the block driver, and will | |
180 | * try to acquire bd_mutex. If bd_mutex has been held already | |
181 | * in current context, please call __blkdev_reread_part(). | |
b04a5636 ML |
182 | * |
183 | * Make sure the held locks in current context aren't required | |
184 | * in open()/close() handler and I/O path for avoiding ABBA deadlock: | |
185 | * - bd_mutex is held before calling block driver's open/close | |
186 | * handler | |
187 | * - reading partition table may submit I/O to the block device | |
be324177 JW |
188 | */ |
189 | int blkdev_reread_part(struct block_device *bdev) | |
190 | { | |
191 | int res; | |
192 | ||
b04a5636 | 193 | mutex_lock(&bdev->bd_mutex); |
be324177 | 194 | res = __blkdev_reread_part(bdev); |
c039e313 | 195 | mutex_unlock(&bdev->bd_mutex); |
be324177 | 196 | |
1da177e4 LT |
197 | return res; |
198 | } | |
be324177 | 199 | EXPORT_SYMBOL(blkdev_reread_part); |
1da177e4 | 200 | |
d8e4bb81 CH |
201 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
202 | unsigned long arg, unsigned long flags) | |
d30a2605 | 203 | { |
d8e4bb81 CH |
204 | uint64_t range[2]; |
205 | uint64_t start, len; | |
351499a1 DM |
206 | struct request_queue *q = bdev_get_queue(bdev); |
207 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
208 | ||
d8e4bb81 CH |
209 | |
210 | if (!(mode & FMODE_WRITE)) | |
211 | return -EBADF; | |
212 | ||
351499a1 DM |
213 | if (!blk_queue_discard(q)) |
214 | return -EOPNOTSUPP; | |
215 | ||
d8e4bb81 CH |
216 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
217 | return -EFAULT; | |
218 | ||
219 | start = range[0]; | |
220 | len = range[1]; | |
8d57a98c | 221 | |
d30a2605 DW |
222 | if (start & 511) |
223 | return -EINVAL; | |
224 | if (len & 511) | |
225 | return -EINVAL; | |
d30a2605 | 226 | |
351499a1 | 227 | if (start + len > i_size_read(bdev->bd_inode)) |
d30a2605 | 228 | return -EINVAL; |
0bd1ed48 | 229 | truncate_inode_pages_range(mapping, start, start + len - 1); |
351499a1 DM |
230 | return blkdev_issue_discard(bdev, start >> 9, len >> 9, |
231 | GFP_KERNEL, flags); | |
d30a2605 DW |
232 | } |
233 | ||
d8e4bb81 CH |
234 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
235 | unsigned long arg) | |
66ba32dc | 236 | { |
d8e4bb81 | 237 | uint64_t range[2]; |
22dd6d35 DW |
238 | struct address_space *mapping; |
239 | uint64_t start, end, len; | |
d8e4bb81 CH |
240 | |
241 | if (!(mode & FMODE_WRITE)) | |
242 | return -EBADF; | |
243 | ||
244 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
245 | return -EFAULT; | |
246 | ||
247 | start = range[0]; | |
248 | len = range[1]; | |
22dd6d35 | 249 | end = start + len - 1; |
d8e4bb81 | 250 | |
66ba32dc MP |
251 | if (start & 511) |
252 | return -EINVAL; | |
253 | if (len & 511) | |
254 | return -EINVAL; | |
22dd6d35 DW |
255 | if (end >= (uint64_t)i_size_read(bdev->bd_inode)) |
256 | return -EINVAL; | |
257 | if (end < start) | |
66ba32dc MP |
258 | return -EINVAL; |
259 | ||
22dd6d35 DW |
260 | /* Invalidate the page cache, including dirty pages */ |
261 | mapping = bdev->bd_inode->i_mapping; | |
262 | truncate_inode_pages_range(mapping, start, end); | |
263 | ||
264 | return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
ee472d83 | 265 | BLKDEV_ZERO_NOUNMAP); |
66ba32dc MP |
266 | } |
267 | ||
1da177e4 LT |
268 | static int put_ushort(unsigned long arg, unsigned short val) |
269 | { | |
270 | return put_user(val, (unsigned short __user *)arg); | |
271 | } | |
272 | ||
273 | static int put_int(unsigned long arg, int val) | |
274 | { | |
275 | return put_user(val, (int __user *)arg); | |
276 | } | |
277 | ||
ac481c20 MP |
278 | static int put_uint(unsigned long arg, unsigned int val) |
279 | { | |
280 | return put_user(val, (unsigned int __user *)arg); | |
281 | } | |
282 | ||
1da177e4 LT |
283 | static int put_long(unsigned long arg, long val) |
284 | { | |
285 | return put_user(val, (long __user *)arg); | |
286 | } | |
287 | ||
288 | static int put_ulong(unsigned long arg, unsigned long val) | |
289 | { | |
290 | return put_user(val, (unsigned long __user *)arg); | |
291 | } | |
292 | ||
293 | static int put_u64(unsigned long arg, u64 val) | |
294 | { | |
295 | return put_user(val, (u64 __user *)arg); | |
296 | } | |
297 | ||
633a08b8 AV |
298 | int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, |
299 | unsigned cmd, unsigned long arg) | |
300 | { | |
301 | struct gendisk *disk = bdev->bd_disk; | |
d4430d62 AV |
302 | |
303 | if (disk->fops->ioctl) | |
304 | return disk->fops->ioctl(bdev, mode, cmd, arg); | |
633a08b8 | 305 | |
633a08b8 AV |
306 | return -ENOTTY; |
307 | } | |
308 | /* | |
309 | * For the record: _GPL here is only because somebody decided to slap it | |
310 | * on the previous export. Sheer idiocy, since it wasn't copyrightable | |
311 | * at all and could be open-coded without any exports by anybody who cares. | |
312 | */ | |
313 | EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl); | |
314 | ||
bbd3e064 CH |
315 | static int blkdev_pr_register(struct block_device *bdev, |
316 | struct pr_registration __user *arg) | |
317 | { | |
318 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
319 | struct pr_registration reg; | |
320 | ||
321 | if (!capable(CAP_SYS_ADMIN)) | |
322 | return -EPERM; | |
323 | if (!ops || !ops->pr_register) | |
324 | return -EOPNOTSUPP; | |
325 | if (copy_from_user(®, arg, sizeof(reg))) | |
326 | return -EFAULT; | |
327 | ||
328 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
329 | return -EOPNOTSUPP; | |
330 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
331 | } | |
332 | ||
333 | static int blkdev_pr_reserve(struct block_device *bdev, | |
334 | struct pr_reservation __user *arg) | |
335 | { | |
336 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
337 | struct pr_reservation rsv; | |
338 | ||
339 | if (!capable(CAP_SYS_ADMIN)) | |
340 | return -EPERM; | |
341 | if (!ops || !ops->pr_reserve) | |
342 | return -EOPNOTSUPP; | |
343 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
344 | return -EFAULT; | |
345 | ||
346 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
347 | return -EOPNOTSUPP; | |
348 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
349 | } | |
350 | ||
351 | static int blkdev_pr_release(struct block_device *bdev, | |
352 | struct pr_reservation __user *arg) | |
353 | { | |
354 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
355 | struct pr_reservation rsv; | |
356 | ||
357 | if (!capable(CAP_SYS_ADMIN)) | |
358 | return -EPERM; | |
359 | if (!ops || !ops->pr_release) | |
360 | return -EOPNOTSUPP; | |
361 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
362 | return -EFAULT; | |
363 | ||
364 | if (rsv.flags) | |
365 | return -EOPNOTSUPP; | |
366 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
367 | } | |
368 | ||
369 | static int blkdev_pr_preempt(struct block_device *bdev, | |
370 | struct pr_preempt __user *arg, bool abort) | |
371 | { | |
372 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
373 | struct pr_preempt p; | |
374 | ||
375 | if (!capable(CAP_SYS_ADMIN)) | |
376 | return -EPERM; | |
377 | if (!ops || !ops->pr_preempt) | |
378 | return -EOPNOTSUPP; | |
379 | if (copy_from_user(&p, arg, sizeof(p))) | |
380 | return -EFAULT; | |
381 | ||
382 | if (p.flags) | |
383 | return -EOPNOTSUPP; | |
384 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
385 | } | |
386 | ||
387 | static int blkdev_pr_clear(struct block_device *bdev, | |
388 | struct pr_clear __user *arg) | |
389 | { | |
390 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
391 | struct pr_clear c; | |
392 | ||
393 | if (!capable(CAP_SYS_ADMIN)) | |
394 | return -EPERM; | |
395 | if (!ops || !ops->pr_clear) | |
396 | return -EOPNOTSUPP; | |
397 | if (copy_from_user(&c, arg, sizeof(c))) | |
398 | return -EFAULT; | |
399 | ||
400 | if (c.flags) | |
401 | return -EOPNOTSUPP; | |
402 | return ops->pr_clear(bdev, c.key); | |
403 | } | |
404 | ||
07d106d0 LT |
405 | /* |
406 | * Is it an unrecognized ioctl? The correct returns are either | |
407 | * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a | |
408 | * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl | |
409 | * code before returning. | |
410 | * | |
411 | * Confused drivers sometimes return EINVAL, which is wrong. It | |
412 | * means "I understood the ioctl command, but the parameters to | |
413 | * it were wrong". | |
414 | * | |
415 | * We should aim to just fix the broken drivers, the EINVAL case | |
416 | * should go away. | |
417 | */ | |
418 | static inline int is_unrecognized_ioctl(int ret) | |
419 | { | |
420 | return ret == -EINVAL || | |
421 | ret == -ENOTTY || | |
422 | ret == -ENOIOCTLCMD; | |
423 | } | |
424 | ||
d8e4bb81 CH |
425 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
426 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 427 | { |
d8e4bb81 | 428 | int ret; |
bb93e3a5 | 429 | |
d8e4bb81 CH |
430 | if (!capable(CAP_SYS_ADMIN)) |
431 | return -EACCES; | |
bb93e3a5 | 432 | |
d8e4bb81 CH |
433 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
434 | if (!is_unrecognized_ioctl(ret)) | |
435 | return ret; | |
bb93e3a5 | 436 | |
d8e4bb81 CH |
437 | fsync_bdev(bdev); |
438 | invalidate_bdev(bdev); | |
439 | return 0; | |
440 | } | |
d30a2605 | 441 | |
d8e4bb81 CH |
442 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
443 | unsigned cmd, unsigned long arg) | |
444 | { | |
445 | int ret, n; | |
d30a2605 | 446 | |
bb749b31 ID |
447 | if (!capable(CAP_SYS_ADMIN)) |
448 | return -EACCES; | |
449 | ||
d8e4bb81 CH |
450 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
451 | if (!is_unrecognized_ioctl(ret)) | |
452 | return ret; | |
d8e4bb81 CH |
453 | if (get_user(n, (int __user *)arg)) |
454 | return -EFAULT; | |
455 | set_device_ro(bdev, n); | |
456 | return 0; | |
457 | } | |
d30a2605 | 458 | |
d8e4bb81 CH |
459 | static int blkdev_getgeo(struct block_device *bdev, |
460 | struct hd_geometry __user *argp) | |
461 | { | |
462 | struct gendisk *disk = bdev->bd_disk; | |
463 | struct hd_geometry geo; | |
464 | int ret; | |
d30a2605 | 465 | |
d8e4bb81 CH |
466 | if (!argp) |
467 | return -EINVAL; | |
468 | if (!disk->fops->getgeo) | |
469 | return -ENOTTY; | |
470 | ||
471 | /* | |
472 | * We need to set the startsect first, the driver may | |
473 | * want to override it. | |
474 | */ | |
475 | memset(&geo, 0, sizeof(geo)); | |
476 | geo.start = get_start_sect(bdev); | |
477 | ret = disk->fops->getgeo(bdev, &geo); | |
478 | if (ret) | |
479 | return ret; | |
480 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
481 | return -EFAULT; | |
482 | return 0; | |
483 | } | |
66ba32dc | 484 | |
d8e4bb81 CH |
485 | /* set the logical block size */ |
486 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
487 | int __user *argp) | |
488 | { | |
489 | int ret, n; | |
66ba32dc | 490 | |
d8e4bb81 CH |
491 | if (!capable(CAP_SYS_ADMIN)) |
492 | return -EACCES; | |
493 | if (!argp) | |
494 | return -EINVAL; | |
495 | if (get_user(n, argp)) | |
496 | return -EFAULT; | |
66ba32dc | 497 | |
d8e4bb81 CH |
498 | if (!(mode & FMODE_EXCL)) { |
499 | bdgrab(bdev); | |
500 | if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0) | |
501 | return -EBUSY; | |
66ba32dc | 502 | } |
d30a2605 | 503 | |
d8e4bb81 CH |
504 | ret = set_blocksize(bdev, n); |
505 | if (!(mode & FMODE_EXCL)) | |
506 | blkdev_put(bdev, mode | FMODE_EXCL); | |
507 | return ret; | |
508 | } | |
a885c8c4 | 509 | |
d8e4bb81 CH |
510 | /* |
511 | * always keep this in sync with compat_blkdev_ioctl() | |
512 | */ | |
513 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
514 | unsigned long arg) | |
515 | { | |
d8e4bb81 CH |
516 | void __user *argp = (void __user *)arg; |
517 | loff_t size; | |
518 | unsigned int max_sectors; | |
519 | ||
520 | switch (cmd) { | |
521 | case BLKFLSBUF: | |
522 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
523 | case BLKROSET: | |
524 | return blkdev_roset(bdev, mode, cmd, arg); | |
525 | case BLKDISCARD: | |
526 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
527 | case BLKSECDISCARD: | |
528 | return blk_ioctl_discard(bdev, mode, arg, | |
529 | BLKDEV_DISCARD_SECURE); | |
530 | case BLKZEROOUT: | |
531 | return blk_ioctl_zeroout(bdev, mode, arg); | |
3ed05a98 ST |
532 | case BLKREPORTZONE: |
533 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
534 | case BLKRESETZONE: | |
535 | return blkdev_reset_zones_ioctl(bdev, mode, cmd, arg); | |
72cd8757 DLM |
536 | case BLKGETZONESZ: |
537 | return put_uint(arg, bdev_zone_sectors(bdev)); | |
65e4e3ee DLM |
538 | case BLKGETNRZONES: |
539 | return put_uint(arg, blkdev_nr_zones(bdev)); | |
d8e4bb81 CH |
540 | case HDIO_GETGEO: |
541 | return blkdev_getgeo(bdev, argp); | |
45048d09 AV |
542 | case BLKRAGET: |
543 | case BLKFRAGET: | |
544 | if (!arg) | |
545 | return -EINVAL; | |
efa7c9f9 | 546 | return put_long(arg, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512); |
45048d09 AV |
547 | case BLKROGET: |
548 | return put_int(arg, bdev_read_only(bdev) != 0); | |
ac481c20 | 549 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ |
45048d09 | 550 | return put_int(arg, block_size(bdev)); |
ac481c20 | 551 | case BLKSSZGET: /* get block device logical block size */ |
e1defc4f | 552 | return put_int(arg, bdev_logical_block_size(bdev)); |
ac481c20 MP |
553 | case BLKPBSZGET: /* get block device physical block size */ |
554 | return put_uint(arg, bdev_physical_block_size(bdev)); | |
555 | case BLKIOMIN: | |
556 | return put_uint(arg, bdev_io_min(bdev)); | |
557 | case BLKIOOPT: | |
558 | return put_uint(arg, bdev_io_opt(bdev)); | |
559 | case BLKALIGNOFF: | |
560 | return put_int(arg, bdev_alignment_offset(bdev)); | |
98262f27 | 561 | case BLKDISCARDZEROES: |
48920ff2 | 562 | return put_uint(arg, 0); |
45048d09 | 563 | case BLKSECTGET: |
63f26496 AM |
564 | max_sectors = min_t(unsigned int, USHRT_MAX, |
565 | queue_max_sectors(bdev_get_queue(bdev))); | |
566 | return put_ushort(arg, max_sectors); | |
ef00f59c MP |
567 | case BLKROTATIONAL: |
568 | return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev))); | |
45048d09 AV |
569 | case BLKRASET: |
570 | case BLKFRASET: | |
571 | if(!capable(CAP_SYS_ADMIN)) | |
572 | return -EACCES; | |
efa7c9f9 | 573 | bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 AV |
574 | return 0; |
575 | case BLKBSZSET: | |
d8e4bb81 | 576 | return blkdev_bszset(bdev, mode, argp); |
45048d09 | 577 | case BLKPG: |
d8e4bb81 | 578 | return blkpg_ioctl(bdev, argp); |
45048d09 | 579 | case BLKRRPART: |
d8e4bb81 | 580 | return blkdev_reread_part(bdev); |
45048d09 | 581 | case BLKGETSIZE: |
77304d2a | 582 | size = i_size_read(bdev->bd_inode); |
45048d09 AV |
583 | if ((size >> 9) > ~0UL) |
584 | return -EFBIG; | |
585 | return put_ulong(arg, size >> 9); | |
586 | case BLKGETSIZE64: | |
77304d2a | 587 | return put_u64(arg, i_size_read(bdev->bd_inode)); |
45048d09 AV |
588 | case BLKTRACESTART: |
589 | case BLKTRACESTOP: | |
590 | case BLKTRACESETUP: | |
591 | case BLKTRACETEARDOWN: | |
d8e4bb81 | 592 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
593 | case IOC_PR_REGISTER: |
594 | return blkdev_pr_register(bdev, argp); | |
595 | case IOC_PR_RESERVE: | |
596 | return blkdev_pr_reserve(bdev, argp); | |
597 | case IOC_PR_RELEASE: | |
598 | return blkdev_pr_release(bdev, argp); | |
599 | case IOC_PR_PREEMPT: | |
600 | return blkdev_pr_preempt(bdev, argp, false); | |
601 | case IOC_PR_PREEMPT_ABORT: | |
602 | return blkdev_pr_preempt(bdev, argp, true); | |
603 | case IOC_PR_CLEAR: | |
604 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 605 | default: |
d8e4bb81 | 606 | return __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
45048d09 | 607 | } |
1da177e4 | 608 | } |
68f66feb | 609 | EXPORT_SYMBOL_GPL(blkdev_ioctl); |