Commit | Line | Data |
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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 | ||
f0b870df | 158 | static int blkdev_reread_part(struct block_device *bdev) |
1da177e4 | 159 | { |
f0b870df CH |
160 | int ret; |
161 | ||
142fe8f4 | 162 | if (!disk_part_scan_enabled(bdev->bd_disk) || bdev != bdev->bd_contains) |
1da177e4 LT |
163 | return -EINVAL; |
164 | if (!capable(CAP_SYS_ADMIN)) | |
165 | return -EACCES; | |
be324177 | 166 | |
b04a5636 | 167 | mutex_lock(&bdev->bd_mutex); |
f0b870df | 168 | ret = bdev_disk_changed(bdev, false); |
c039e313 | 169 | mutex_unlock(&bdev->bd_mutex); |
be324177 | 170 | |
f0b870df | 171 | return ret; |
1da177e4 LT |
172 | } |
173 | ||
d8e4bb81 CH |
174 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
175 | unsigned long arg, unsigned long flags) | |
d30a2605 | 176 | { |
d8e4bb81 CH |
177 | uint64_t range[2]; |
178 | uint64_t start, len; | |
351499a1 DM |
179 | struct request_queue *q = bdev_get_queue(bdev); |
180 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
181 | ||
d8e4bb81 CH |
182 | |
183 | if (!(mode & FMODE_WRITE)) | |
184 | return -EBADF; | |
185 | ||
351499a1 DM |
186 | if (!blk_queue_discard(q)) |
187 | return -EOPNOTSUPP; | |
188 | ||
d8e4bb81 CH |
189 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
190 | return -EFAULT; | |
191 | ||
192 | start = range[0]; | |
193 | len = range[1]; | |
8d57a98c | 194 | |
d30a2605 DW |
195 | if (start & 511) |
196 | return -EINVAL; | |
197 | if (len & 511) | |
198 | return -EINVAL; | |
d30a2605 | 199 | |
351499a1 | 200 | if (start + len > i_size_read(bdev->bd_inode)) |
d30a2605 | 201 | return -EINVAL; |
0bd1ed48 | 202 | truncate_inode_pages_range(mapping, start, start + len - 1); |
351499a1 DM |
203 | return blkdev_issue_discard(bdev, start >> 9, len >> 9, |
204 | GFP_KERNEL, flags); | |
d30a2605 DW |
205 | } |
206 | ||
d8e4bb81 CH |
207 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
208 | unsigned long arg) | |
66ba32dc | 209 | { |
d8e4bb81 | 210 | uint64_t range[2]; |
22dd6d35 DW |
211 | struct address_space *mapping; |
212 | uint64_t start, end, len; | |
d8e4bb81 CH |
213 | |
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]; | |
22dd6d35 | 222 | end = start + len - 1; |
d8e4bb81 | 223 | |
66ba32dc MP |
224 | if (start & 511) |
225 | return -EINVAL; | |
226 | if (len & 511) | |
227 | return -EINVAL; | |
22dd6d35 DW |
228 | if (end >= (uint64_t)i_size_read(bdev->bd_inode)) |
229 | return -EINVAL; | |
230 | if (end < start) | |
66ba32dc MP |
231 | return -EINVAL; |
232 | ||
22dd6d35 DW |
233 | /* 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, | |
ee472d83 | 238 | BLKDEV_ZERO_NOUNMAP); |
66ba32dc MP |
239 | } |
240 | ||
1da177e4 LT |
241 | static int put_ushort(unsigned long arg, unsigned short val) |
242 | { | |
243 | return put_user(val, (unsigned short __user *)arg); | |
244 | } | |
245 | ||
246 | static int put_int(unsigned long arg, int val) | |
247 | { | |
248 | return put_user(val, (int __user *)arg); | |
249 | } | |
250 | ||
ac481c20 MP |
251 | static int put_uint(unsigned long arg, unsigned int val) |
252 | { | |
253 | return put_user(val, (unsigned int __user *)arg); | |
254 | } | |
255 | ||
1da177e4 LT |
256 | static int put_long(unsigned long arg, long val) |
257 | { | |
258 | return put_user(val, (long __user *)arg); | |
259 | } | |
260 | ||
261 | static int put_ulong(unsigned long arg, unsigned long val) | |
262 | { | |
263 | return put_user(val, (unsigned long __user *)arg); | |
264 | } | |
265 | ||
266 | static int put_u64(unsigned long arg, u64 val) | |
267 | { | |
268 | return put_user(val, (u64 __user *)arg); | |
269 | } | |
270 | ||
633a08b8 AV |
271 | int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, |
272 | unsigned cmd, unsigned long arg) | |
273 | { | |
274 | struct gendisk *disk = bdev->bd_disk; | |
d4430d62 AV |
275 | |
276 | if (disk->fops->ioctl) | |
277 | return disk->fops->ioctl(bdev, mode, cmd, arg); | |
633a08b8 | 278 | |
633a08b8 AV |
279 | 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 | */ | |
286 | EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl); | |
287 | ||
bbd3e064 CH |
288 | static 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(®, 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 | ||
306 | static 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 | ||
324 | static 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 | ||
342 | static 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 | ||
360 | static 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 | ||
07d106d0 LT |
378 | /* |
379 | * 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 | */ | |
391 | static inline int is_unrecognized_ioctl(int ret) | |
392 | { | |
393 | return ret == -EINVAL || | |
394 | ret == -ENOTTY || | |
395 | ret == -ENOIOCTLCMD; | |
396 | } | |
397 | ||
d8e4bb81 CH |
398 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
399 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 400 | { |
d8e4bb81 | 401 | int ret; |
bb93e3a5 | 402 | |
d8e4bb81 CH |
403 | if (!capable(CAP_SYS_ADMIN)) |
404 | return -EACCES; | |
bb93e3a5 | 405 | |
d8e4bb81 CH |
406 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
407 | if (!is_unrecognized_ioctl(ret)) | |
408 | return ret; | |
bb93e3a5 | 409 | |
d8e4bb81 CH |
410 | fsync_bdev(bdev); |
411 | invalidate_bdev(bdev); | |
412 | return 0; | |
413 | } | |
d30a2605 | 414 | |
d8e4bb81 CH |
415 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
416 | unsigned cmd, unsigned long arg) | |
417 | { | |
418 | int ret, n; | |
d30a2605 | 419 | |
bb749b31 ID |
420 | if (!capable(CAP_SYS_ADMIN)) |
421 | return -EACCES; | |
422 | ||
d8e4bb81 CH |
423 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
424 | if (!is_unrecognized_ioctl(ret)) | |
425 | return ret; | |
d8e4bb81 CH |
426 | if (get_user(n, (int __user *)arg)) |
427 | return -EFAULT; | |
428 | set_device_ro(bdev, n); | |
429 | return 0; | |
430 | } | |
d30a2605 | 431 | |
d8e4bb81 CH |
432 | static 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; | |
d30a2605 | 438 | |
d8e4bb81 CH |
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 | } | |
66ba32dc | 457 | |
d8e4bb81 CH |
458 | /* set the logical block size */ |
459 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
460 | int __user *argp) | |
461 | { | |
462 | int ret, n; | |
66ba32dc | 463 | |
d8e4bb81 CH |
464 | if (!capable(CAP_SYS_ADMIN)) |
465 | return -EACCES; | |
466 | if (!argp) | |
467 | return -EINVAL; | |
468 | if (get_user(n, argp)) | |
469 | return -EFAULT; | |
66ba32dc | 470 | |
d8e4bb81 CH |
471 | if (!(mode & FMODE_EXCL)) { |
472 | bdgrab(bdev); | |
473 | if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0) | |
474 | return -EBUSY; | |
66ba32dc | 475 | } |
d30a2605 | 476 | |
d8e4bb81 CH |
477 | ret = set_blocksize(bdev, n); |
478 | if (!(mode & FMODE_EXCL)) | |
479 | blkdev_put(bdev, mode | FMODE_EXCL); | |
480 | return ret; | |
481 | } | |
a885c8c4 | 482 | |
d8e4bb81 CH |
483 | /* |
484 | * always keep this in sync with compat_blkdev_ioctl() | |
485 | */ | |
486 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
487 | unsigned long arg) | |
488 | { | |
d8e4bb81 CH |
489 | void __user *argp = (void __user *)arg; |
490 | loff_t size; | |
491 | unsigned int max_sectors; | |
492 | ||
493 | switch (cmd) { | |
494 | case BLKFLSBUF: | |
495 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
496 | case BLKROSET: | |
497 | return blkdev_roset(bdev, mode, cmd, arg); | |
498 | case BLKDISCARD: | |
499 | 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); | |
3ed05a98 ST |
505 | case BLKREPORTZONE: |
506 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
507 | case BLKRESETZONE: | |
e876df1f AJ |
508 | case BLKOPENZONE: |
509 | case BLKCLOSEZONE: | |
510 | case BLKFINISHZONE: | |
511 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 DLM |
512 | case BLKGETZONESZ: |
513 | return put_uint(arg, bdev_zone_sectors(bdev)); | |
65e4e3ee | 514 | case BLKGETNRZONES: |
9b38bb4b | 515 | return put_uint(arg, blkdev_nr_zones(bdev->bd_disk)); |
d8e4bb81 CH |
516 | case HDIO_GETGEO: |
517 | return blkdev_getgeo(bdev, argp); | |
45048d09 AV |
518 | case BLKRAGET: |
519 | case BLKFRAGET: | |
520 | if (!arg) | |
521 | return -EINVAL; | |
efa7c9f9 | 522 | return put_long(arg, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512); |
45048d09 AV |
523 | case BLKROGET: |
524 | return put_int(arg, bdev_read_only(bdev) != 0); | |
ac481c20 | 525 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ |
45048d09 | 526 | return put_int(arg, block_size(bdev)); |
ac481c20 | 527 | case BLKSSZGET: /* get block device logical block size */ |
e1defc4f | 528 | return put_int(arg, bdev_logical_block_size(bdev)); |
ac481c20 MP |
529 | 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)); | |
98262f27 | 537 | case BLKDISCARDZEROES: |
48920ff2 | 538 | return put_uint(arg, 0); |
45048d09 | 539 | case BLKSECTGET: |
63f26496 AM |
540 | max_sectors = min_t(unsigned int, USHRT_MAX, |
541 | queue_max_sectors(bdev_get_queue(bdev))); | |
542 | return put_ushort(arg, max_sectors); | |
ef00f59c MP |
543 | case BLKROTATIONAL: |
544 | return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev))); | |
45048d09 AV |
545 | case BLKRASET: |
546 | case BLKFRASET: | |
547 | if(!capable(CAP_SYS_ADMIN)) | |
548 | return -EACCES; | |
efa7c9f9 | 549 | bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 AV |
550 | return 0; |
551 | case BLKBSZSET: | |
d8e4bb81 | 552 | return blkdev_bszset(bdev, mode, argp); |
45048d09 | 553 | case BLKPG: |
d8e4bb81 | 554 | return blkpg_ioctl(bdev, argp); |
45048d09 | 555 | case BLKRRPART: |
d8e4bb81 | 556 | return blkdev_reread_part(bdev); |
45048d09 | 557 | case BLKGETSIZE: |
77304d2a | 558 | size = i_size_read(bdev->bd_inode); |
45048d09 AV |
559 | if ((size >> 9) > ~0UL) |
560 | return -EFBIG; | |
561 | return put_ulong(arg, size >> 9); | |
562 | case BLKGETSIZE64: | |
77304d2a | 563 | return put_u64(arg, i_size_read(bdev->bd_inode)); |
45048d09 AV |
564 | case BLKTRACESTART: |
565 | case BLKTRACESTOP: | |
566 | case BLKTRACESETUP: | |
567 | case BLKTRACETEARDOWN: | |
d8e4bb81 | 568 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
569 | 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); | |
45048d09 | 581 | default: |
d8e4bb81 | 582 | return __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
45048d09 | 583 | } |
1da177e4 | 584 | } |
68f66feb | 585 | EXPORT_SYMBOL_GPL(blkdev_ioctl); |