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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 |
16 | static 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 | 20 | struct blkpg_partition p; |
b9355185 | 21 | sector_t start, length, capacity, end; |
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 | |
ccb326b5 | 36 | if (p.start < 0 || p.length <= 0 || LLONG_MAX - p.length < p.start) |
6f64f866 ML |
37 | return -EINVAL; |
38 | /* Check that the partition is aligned to the block size */ | |
39 | if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev))) | |
40 | return -EINVAL; | |
41 | ||
fa9156ae CH |
42 | start = p.start >> SECTOR_SHIFT; |
43 | length = p.length >> SECTOR_SHIFT; | |
b9355185 LL |
44 | capacity = get_capacity(disk); |
45 | ||
46 | if (check_add_overflow(start, length, &end)) | |
47 | return -EINVAL; | |
48 | ||
49 | if (start >= capacity || end > capacity) | |
50 | return -EINVAL; | |
e71bf0d0 | 51 | |
fa9156ae CH |
52 | switch (op) { |
53 | case BLKPG_ADD_PARTITION: | |
7f6be376 | 54 | return bdev_add_partition(disk, p.pno, start, length); |
fa9156ae | 55 | case BLKPG_RESIZE_PARTITION: |
3d2e7989 | 56 | return bdev_resize_partition(disk, p.pno, start, length); |
fa9156ae CH |
57 | default: |
58 | return -EINVAL; | |
1da177e4 LT |
59 | } |
60 | } | |
61 | ||
5fb889f5 AB |
62 | static int blkpg_ioctl(struct block_device *bdev, |
63 | struct blkpg_ioctl_arg __user *arg) | |
64 | { | |
65 | struct blkpg_partition __user *udata; | |
66 | int op; | |
67 | ||
68 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
69 | return -EFAULT; | |
70 | ||
71 | return blkpg_do_ioctl(bdev, udata, op); | |
72 | } | |
73 | ||
74 | #ifdef CONFIG_COMPAT | |
75 | struct compat_blkpg_ioctl_arg { | |
76 | compat_int_t op; | |
77 | compat_int_t flags; | |
78 | compat_int_t datalen; | |
79 | compat_caddr_t data; | |
80 | }; | |
81 | ||
82 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
83 | struct compat_blkpg_ioctl_arg __user *arg) | |
84 | { | |
85 | compat_caddr_t udata; | |
86 | int op; | |
87 | ||
88 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
89 | return -EFAULT; | |
90 | ||
91 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
92 | } | |
93 | #endif | |
94 | ||
05bdb996 | 95 | static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode, |
44abff2c | 96 | unsigned long arg) |
d30a2605 | 97 | { |
30f1e724 | 98 | unsigned int bs_mask = bdev_logical_block_size(bdev) - 1; |
7607c44c | 99 | struct inode *inode = bdev->bd_inode; |
0c9f4ac8 | 100 | uint64_t range[2], start, len, end; |
719c15a7 CH |
101 | struct bio *prev = NULL, *bio; |
102 | sector_t sector, nr_sects; | |
103 | struct blk_plug plug; | |
384d87ef | 104 | int err; |
d8e4bb81 | 105 | |
05bdb996 | 106 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
107 | return -EBADF; |
108 | ||
70200574 | 109 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 | 110 | return -EOPNOTSUPP; |
30f1e724 CH |
111 | if (bdev_read_only(bdev)) |
112 | return -EPERM; | |
351499a1 | 113 | |
d8e4bb81 CH |
114 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
115 | return -EFAULT; | |
116 | ||
117 | start = range[0]; | |
118 | len = range[1]; | |
8d57a98c | 119 | |
30f1e724 | 120 | if (!len) |
d30a2605 | 121 | return -EINVAL; |
30f1e724 | 122 | if ((start | len) & bs_mask) |
d30a2605 | 123 | return -EINVAL; |
d30a2605 | 124 | |
22d24a54 LN |
125 | if (check_add_overflow(start, len, &end) || |
126 | end > bdev_nr_bytes(bdev)) | |
d30a2605 | 127 | return -EINVAL; |
384d87ef | 128 | |
7607c44c | 129 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
130 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
131 | if (err) | |
7607c44c | 132 | goto fail; |
719c15a7 CH |
133 | |
134 | sector = start >> SECTOR_SHIFT; | |
135 | nr_sects = len >> SECTOR_SHIFT; | |
136 | ||
137 | blk_start_plug(&plug); | |
138 | while (1) { | |
139 | if (fatal_signal_pending(current)) { | |
140 | if (prev) | |
141 | bio_await_chain(prev); | |
142 | err = -EINTR; | |
143 | goto out_unplug; | |
144 | } | |
145 | bio = blk_alloc_discard_bio(bdev, §or, &nr_sects, | |
146 | GFP_KERNEL); | |
147 | if (!bio) | |
148 | break; | |
149 | prev = bio_chain_and_submit(prev, bio); | |
150 | } | |
151 | if (prev) { | |
152 | err = submit_bio_wait(prev); | |
153 | if (err == -EOPNOTSUPP) | |
154 | err = 0; | |
155 | bio_put(prev); | |
156 | } | |
157 | out_unplug: | |
158 | blk_finish_plug(&plug); | |
7607c44c SK |
159 | fail: |
160 | filemap_invalidate_unlock(inode->i_mapping); | |
161 | return err; | |
d30a2605 DW |
162 | } |
163 | ||
05bdb996 | 164 | static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, |
44abff2c CH |
165 | void __user *argp) |
166 | { | |
167 | uint64_t start, len; | |
168 | uint64_t range[2]; | |
169 | int err; | |
170 | ||
05bdb996 | 171 | if (!(mode & BLK_OPEN_WRITE)) |
44abff2c CH |
172 | return -EBADF; |
173 | if (!bdev_max_secure_erase_sectors(bdev)) | |
174 | return -EOPNOTSUPP; | |
175 | if (copy_from_user(range, argp, sizeof(range))) | |
176 | return -EFAULT; | |
177 | ||
178 | start = range[0]; | |
179 | len = range[1]; | |
180 | if ((start & 511) || (len & 511)) | |
181 | return -EINVAL; | |
182 | if (start + len > bdev_nr_bytes(bdev)) | |
183 | return -EINVAL; | |
184 | ||
185 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
186 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
187 | if (!err) | |
188 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
189 | GFP_KERNEL); | |
190 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
191 | return err; | |
192 | } | |
193 | ||
194 | ||
05bdb996 | 195 | static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 | 196 | unsigned long arg) |
66ba32dc | 197 | { |
d8e4bb81 | 198 | uint64_t range[2]; |
22dd6d35 | 199 | uint64_t start, end, len; |
35e4c6c1 | 200 | struct inode *inode = bdev->bd_inode; |
384d87ef | 201 | int err; |
d8e4bb81 | 202 | |
05bdb996 | 203 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
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]; | |
22dd6d35 | 211 | end = start + len - 1; |
d8e4bb81 | 212 | |
66ba32dc MP |
213 | if (start & 511) |
214 | return -EINVAL; | |
215 | if (len & 511) | |
216 | return -EINVAL; | |
946e9937 | 217 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
218 | return -EINVAL; |
219 | if (end < start) | |
66ba32dc MP |
220 | return -EINVAL; |
221 | ||
22dd6d35 | 222 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 223 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
224 | err = truncate_bdev_range(bdev, mode, start, end); |
225 | if (err) | |
35e4c6c1 SK |
226 | goto fail; |
227 | ||
228 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
229 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 230 | |
35e4c6c1 SK |
231 | fail: |
232 | filemap_invalidate_unlock(inode->i_mapping); | |
233 | return err; | |
66ba32dc MP |
234 | } |
235 | ||
9b81648c | 236 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 237 | { |
9b81648c | 238 | return put_user(val, argp); |
1da177e4 LT |
239 | } |
240 | ||
9b81648c | 241 | static int put_int(int __user *argp, int val) |
1da177e4 | 242 | { |
9b81648c | 243 | return put_user(val, argp); |
1da177e4 LT |
244 | } |
245 | ||
9b81648c | 246 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 247 | { |
9b81648c | 248 | return put_user(val, argp); |
ac481c20 MP |
249 | } |
250 | ||
9b81648c | 251 | static int put_long(long __user *argp, long val) |
1da177e4 | 252 | { |
9b81648c | 253 | return put_user(val, argp); |
1da177e4 LT |
254 | } |
255 | ||
9b81648c | 256 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 257 | { |
9b81648c | 258 | return put_user(val, argp); |
1da177e4 LT |
259 | } |
260 | ||
9b81648c | 261 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 262 | { |
9b81648c | 263 | return put_user(val, argp); |
1da177e4 LT |
264 | } |
265 | ||
bdc1ddad | 266 | #ifdef CONFIG_COMPAT |
c8210a57 | 267 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 268 | { |
9b81648c | 269 | return put_user(val, argp); |
bdc1ddad AB |
270 | } |
271 | ||
c8210a57 | 272 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 273 | { |
9b81648c | 274 | return put_user(val, argp); |
bdc1ddad AB |
275 | } |
276 | #endif | |
277 | ||
ee6a129d AB |
278 | #ifdef CONFIG_COMPAT |
279 | /* | |
280 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
281 | * drivers that implement only commands that are completely compatible | |
282 | * between 32-bit and 64-bit user space | |
283 | */ | |
05bdb996 | 284 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, |
ee6a129d AB |
285 | unsigned cmd, unsigned long arg) |
286 | { | |
287 | struct gendisk *disk = bdev->bd_disk; | |
288 | ||
289 | if (disk->fops->ioctl) | |
290 | return disk->fops->ioctl(bdev, mode, cmd, | |
291 | (unsigned long)compat_ptr(arg)); | |
292 | ||
293 | return -ENOIOCTLCMD; | |
294 | } | |
295 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
296 | #endif | |
297 | ||
9a72a024 | 298 | static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) |
12629621 JX |
299 | { |
300 | /* no sense to make reservations for partitions */ | |
301 | if (bdev_is_partition(bdev)) | |
302 | return false; | |
303 | ||
304 | if (capable(CAP_SYS_ADMIN)) | |
305 | return true; | |
9a72a024 JX |
306 | /* |
307 | * Only allow unprivileged reservations if the file descriptor is open | |
308 | * for writing. | |
309 | */ | |
310 | return mode & BLK_OPEN_WRITE; | |
12629621 JX |
311 | } |
312 | ||
9a72a024 | 313 | static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
314 | struct pr_registration __user *arg) |
315 | { | |
316 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
317 | struct pr_registration reg; | |
318 | ||
9a72a024 | 319 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
320 | return -EPERM; |
321 | if (!ops || !ops->pr_register) | |
322 | return -EOPNOTSUPP; | |
323 | if (copy_from_user(®, arg, sizeof(reg))) | |
324 | return -EFAULT; | |
325 | ||
326 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
327 | return -EOPNOTSUPP; | |
328 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
329 | } | |
330 | ||
9a72a024 | 331 | static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
332 | struct pr_reservation __user *arg) |
333 | { | |
334 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
335 | struct pr_reservation rsv; | |
336 | ||
9a72a024 | 337 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
338 | return -EPERM; |
339 | if (!ops || !ops->pr_reserve) | |
340 | return -EOPNOTSUPP; | |
341 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
342 | return -EFAULT; | |
343 | ||
344 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
345 | return -EOPNOTSUPP; | |
346 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
347 | } | |
348 | ||
9a72a024 | 349 | static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
350 | struct pr_reservation __user *arg) |
351 | { | |
352 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
353 | struct pr_reservation rsv; | |
354 | ||
9a72a024 | 355 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
356 | return -EPERM; |
357 | if (!ops || !ops->pr_release) | |
358 | return -EOPNOTSUPP; | |
359 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
360 | return -EFAULT; | |
361 | ||
362 | if (rsv.flags) | |
363 | return -EOPNOTSUPP; | |
364 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
365 | } | |
366 | ||
9a72a024 | 367 | static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
368 | struct pr_preempt __user *arg, bool abort) |
369 | { | |
370 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
371 | struct pr_preempt p; | |
372 | ||
9a72a024 | 373 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
374 | return -EPERM; |
375 | if (!ops || !ops->pr_preempt) | |
376 | return -EOPNOTSUPP; | |
377 | if (copy_from_user(&p, arg, sizeof(p))) | |
378 | return -EFAULT; | |
379 | ||
380 | if (p.flags) | |
381 | return -EOPNOTSUPP; | |
382 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
383 | } | |
384 | ||
9a72a024 | 385 | static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
386 | struct pr_clear __user *arg) |
387 | { | |
388 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
389 | struct pr_clear c; | |
390 | ||
9a72a024 | 391 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
392 | return -EPERM; |
393 | if (!ops || !ops->pr_clear) | |
394 | return -EOPNOTSUPP; | |
395 | if (copy_from_user(&c, arg, sizeof(c))) | |
396 | return -EFAULT; | |
397 | ||
398 | if (c.flags) | |
399 | return -EOPNOTSUPP; | |
400 | return ops->pr_clear(bdev, c.key); | |
401 | } | |
402 | ||
5e4ea834 CH |
403 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
404 | unsigned long arg) | |
bb93e3a5 | 405 | { |
d8e4bb81 CH |
406 | if (!capable(CAP_SYS_ADMIN)) |
407 | return -EACCES; | |
2142b88c CH |
408 | |
409 | mutex_lock(&bdev->bd_holder_lock); | |
410 | if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) | |
411 | bdev->bd_holder_ops->sync(bdev); | |
fd146410 JK |
412 | else { |
413 | mutex_unlock(&bdev->bd_holder_lock); | |
2142b88c | 414 | sync_blockdev(bdev); |
fd146410 | 415 | } |
2142b88c | 416 | |
d8e4bb81 CH |
417 | invalidate_bdev(bdev); |
418 | return 0; | |
419 | } | |
d30a2605 | 420 | |
5e4ea834 CH |
421 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
422 | unsigned long arg) | |
d8e4bb81 CH |
423 | { |
424 | int ret, n; | |
d30a2605 | 425 | |
bb749b31 ID |
426 | if (!capable(CAP_SYS_ADMIN)) |
427 | return -EACCES; | |
428 | ||
d8e4bb81 CH |
429 | if (get_user(n, (int __user *)arg)) |
430 | return -EFAULT; | |
e00adcad CH |
431 | if (bdev->bd_disk->fops->set_read_only) { |
432 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
433 | if (ret) | |
434 | return ret; | |
435 | } | |
83950d35 | 436 | bdev->bd_read_only = n; |
d8e4bb81 CH |
437 | return 0; |
438 | } | |
d30a2605 | 439 | |
d8e4bb81 CH |
440 | static int blkdev_getgeo(struct block_device *bdev, |
441 | struct hd_geometry __user *argp) | |
442 | { | |
443 | struct gendisk *disk = bdev->bd_disk; | |
444 | struct hd_geometry geo; | |
445 | int ret; | |
d30a2605 | 446 | |
d8e4bb81 CH |
447 | if (!argp) |
448 | return -EINVAL; | |
449 | if (!disk->fops->getgeo) | |
450 | return -ENOTTY; | |
451 | ||
452 | /* | |
453 | * We need to set the startsect first, the driver may | |
454 | * want to override it. | |
455 | */ | |
456 | memset(&geo, 0, sizeof(geo)); | |
457 | geo.start = get_start_sect(bdev); | |
458 | ret = disk->fops->getgeo(bdev, &geo); | |
459 | if (ret) | |
460 | return ret; | |
461 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
462 | return -EFAULT; | |
463 | return 0; | |
464 | } | |
66ba32dc | 465 | |
bdc1ddad AB |
466 | #ifdef CONFIG_COMPAT |
467 | struct compat_hd_geometry { | |
468 | unsigned char heads; | |
469 | unsigned char sectors; | |
470 | unsigned short cylinders; | |
471 | u32 start; | |
472 | }; | |
473 | ||
9b81648c AB |
474 | static int compat_hdio_getgeo(struct block_device *bdev, |
475 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 476 | { |
9b81648c | 477 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
478 | struct hd_geometry geo; |
479 | int ret; | |
480 | ||
481 | if (!ugeo) | |
482 | return -EINVAL; | |
483 | if (!disk->fops->getgeo) | |
484 | return -ENOTTY; | |
485 | ||
486 | memset(&geo, 0, sizeof(geo)); | |
487 | /* | |
488 | * We need to set the startsect first, the driver may | |
489 | * want to override it. | |
490 | */ | |
491 | geo.start = get_start_sect(bdev); | |
492 | ret = disk->fops->getgeo(bdev, &geo); | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | ret = copy_to_user(ugeo, &geo, 4); | |
497 | ret |= put_user(geo.start, &ugeo->start); | |
498 | if (ret) | |
499 | ret = -EFAULT; | |
500 | ||
501 | return ret; | |
502 | } | |
503 | #endif | |
504 | ||
d8e4bb81 | 505 | /* set the logical block size */ |
05bdb996 | 506 | static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 CH |
507 | int __user *argp) |
508 | { | |
509 | int ret, n; | |
e5ca9d39 | 510 | struct file *file; |
66ba32dc | 511 | |
d8e4bb81 CH |
512 | if (!capable(CAP_SYS_ADMIN)) |
513 | return -EACCES; | |
514 | if (!argp) | |
515 | return -EINVAL; | |
516 | if (get_user(n, argp)) | |
517 | return -EFAULT; | |
66ba32dc | 518 | |
05bdb996 | 519 | if (mode & BLK_OPEN_EXCL) |
47816282 | 520 | return set_blocksize(bdev, n); |
d30a2605 | 521 | |
e5ca9d39 CB |
522 | file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); |
523 | if (IS_ERR(file)) | |
47816282 | 524 | return -EBUSY; |
d8e4bb81 | 525 | ret = set_blocksize(bdev, n); |
e5ca9d39 | 526 | fput(file); |
d8e4bb81 CH |
527 | return ret; |
528 | } | |
a885c8c4 | 529 | |
d8e4bb81 | 530 | /* |
9b81648c AB |
531 | * Common commands that are handled the same way on native and compat |
532 | * user space. Note the separate arg/argp parameters that are needed | |
533 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 534 | */ |
05bdb996 | 535 | static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, |
0f77b29a YK |
536 | unsigned int cmd, unsigned long arg, |
537 | void __user *argp) | |
d8e4bb81 | 538 | { |
d8e4bb81 CH |
539 | unsigned int max_sectors; |
540 | ||
541 | switch (cmd) { | |
542 | case BLKFLSBUF: | |
5e4ea834 | 543 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 544 | case BLKROSET: |
5e4ea834 | 545 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 546 | case BLKDISCARD: |
44abff2c | 547 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 548 | case BLKSECDISCARD: |
44abff2c | 549 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
550 | case BLKZEROOUT: |
551 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
552 | case BLKGETDISKSEQ: |
553 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 554 | case BLKREPORTZONE: |
5e4ea834 | 555 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 556 | case BLKRESETZONE: |
e876df1f AJ |
557 | case BLKOPENZONE: |
558 | case BLKCLOSEZONE: | |
559 | case BLKFINISHZONE: | |
560 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 561 | case BLKGETZONESZ: |
9b81648c | 562 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 563 | case BLKGETNRZONES: |
b623e347 | 564 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 565 | case BLKROGET: |
9b81648c | 566 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 567 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 568 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 569 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 570 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 571 | case BLKIOMIN: |
9b81648c | 572 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 573 | case BLKIOOPT: |
9b81648c | 574 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 575 | case BLKALIGNOFF: |
9b81648c | 576 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 577 | case BLKDISCARDZEROES: |
9b81648c | 578 | return put_uint(argp, 0); |
45048d09 | 579 | case BLKSECTGET: |
63f26496 AM |
580 | max_sectors = min_t(unsigned int, USHRT_MAX, |
581 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 582 | return put_ushort(argp, max_sectors); |
ef00f59c | 583 | case BLKROTATIONAL: |
10f0d2a5 | 584 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
585 | case BLKRASET: |
586 | case BLKFRASET: | |
587 | if(!capable(CAP_SYS_ADMIN)) | |
588 | return -EACCES; | |
a11d7fc2 | 589 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 590 | return 0; |
45048d09 | 591 | case BLKRRPART: |
e16e506c CH |
592 | if (!capable(CAP_SYS_ADMIN)) |
593 | return -EACCES; | |
594 | if (bdev_is_partition(bdev)) | |
595 | return -EINVAL; | |
752863bd CH |
596 | return disk_scan_partitions(bdev->bd_disk, |
597 | mode | BLK_OPEN_STRICT_SCAN); | |
45048d09 AV |
598 | case BLKTRACESTART: |
599 | case BLKTRACESTOP: | |
45048d09 | 600 | case BLKTRACETEARDOWN: |
d8e4bb81 | 601 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 | 602 | case IOC_PR_REGISTER: |
9a72a024 | 603 | return blkdev_pr_register(bdev, mode, argp); |
bbd3e064 | 604 | case IOC_PR_RESERVE: |
9a72a024 | 605 | return blkdev_pr_reserve(bdev, mode, argp); |
bbd3e064 | 606 | case IOC_PR_RELEASE: |
9a72a024 | 607 | return blkdev_pr_release(bdev, mode, argp); |
bbd3e064 | 608 | case IOC_PR_PREEMPT: |
9a72a024 | 609 | return blkdev_pr_preempt(bdev, mode, argp, false); |
bbd3e064 | 610 | case IOC_PR_PREEMPT_ABORT: |
9a72a024 | 611 | return blkdev_pr_preempt(bdev, mode, argp, true); |
bbd3e064 | 612 | case IOC_PR_CLEAR: |
9a72a024 | 613 | return blkdev_pr_clear(bdev, mode, argp); |
45048d09 | 614 | default: |
9b81648c | 615 | return -ENOIOCTLCMD; |
45048d09 | 616 | } |
1da177e4 | 617 | } |
9b81648c AB |
618 | |
619 | /* | |
620 | * Always keep this in sync with compat_blkdev_ioctl() | |
621 | * to handle all incompatible commands in both functions. | |
622 | * | |
623 | * New commands must be compatible and go into blkdev_common_ioctl | |
624 | */ | |
8a709512 | 625 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 626 | { |
8a709512 | 627 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 628 | void __user *argp = (void __user *)arg; |
05bdb996 | 629 | blk_mode_t mode = file_to_blk_mode(file); |
8a709512 CH |
630 | int ret; |
631 | ||
9b81648c AB |
632 | switch (cmd) { |
633 | /* These need separate implementations for the data structure */ | |
634 | case HDIO_GETGEO: | |
635 | return blkdev_getgeo(bdev, argp); | |
636 | case BLKPG: | |
637 | return blkpg_ioctl(bdev, argp); | |
638 | ||
639 | /* Compat mode returns 32-bit data instead of 'long' */ | |
640 | case BLKRAGET: | |
641 | case BLKFRAGET: | |
642 | if (!argp) | |
643 | return -EINVAL; | |
a11d7fc2 CH |
644 | return put_long(argp, |
645 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 646 | case BLKGETSIZE: |
946e9937 | 647 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 648 | return -EFBIG; |
946e9937 | 649 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
650 | |
651 | /* The data is compatible, but the command number is different */ | |
652 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
653 | return put_int(argp, block_size(bdev)); | |
654 | case BLKBSZSET: | |
655 | return blkdev_bszset(bdev, mode, argp); | |
656 | case BLKGETSIZE64: | |
946e9937 | 657 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
658 | |
659 | /* Incompatible alignment on i386 */ | |
660 | case BLKTRACESETUP: | |
661 | return blk_trace_ioctl(bdev, cmd, argp); | |
662 | default: | |
663 | break; | |
664 | } | |
665 | ||
0f77b29a | 666 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
667 | if (ret != -ENOIOCTLCMD) |
668 | return ret; | |
9b81648c | 669 | |
a7cb3d2f CH |
670 | if (!bdev->bd_disk->fops->ioctl) |
671 | return -ENOTTY; | |
672 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 673 | } |
bdc1ddad AB |
674 | |
675 | #ifdef CONFIG_COMPAT | |
9b81648c | 676 | |
bdc1ddad AB |
677 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
678 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
679 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
680 | ||
681 | /* Most of the generic ioctls are handled in the normal fallback path. | |
682 | This assumes the blkdev's low level compat_ioctl always returns | |
683 | ENOIOCTLCMD for unknown ioctls. */ | |
684 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
685 | { | |
9b81648c AB |
686 | int ret; |
687 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 688 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad | 689 | struct gendisk *disk = bdev->bd_disk; |
05bdb996 | 690 | blk_mode_t mode = file_to_blk_mode(file); |
bdc1ddad AB |
691 | |
692 | switch (cmd) { | |
9b81648c | 693 | /* These need separate implementations for the data structure */ |
bdc1ddad | 694 | case HDIO_GETGEO: |
9b81648c | 695 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 696 | case BLKPG: |
9b81648c AB |
697 | return compat_blkpg_ioctl(bdev, argp); |
698 | ||
699 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
700 | case BLKRAGET: |
701 | case BLKFRAGET: | |
9b81648c | 702 | if (!argp) |
bdc1ddad | 703 | return -EINVAL; |
9b81648c | 704 | return compat_put_long(argp, |
a11d7fc2 | 705 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 706 | case BLKGETSIZE: |
ccf16413 | 707 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 708 | return -EFBIG; |
946e9937 | 709 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 710 | |
9b81648c AB |
711 | /* The data is compatible, but the command number is different */ |
712 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
713 | return put_int(argp, bdev_logical_block_size(bdev)); | |
714 | case BLKBSZSET_32: | |
715 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 716 | case BLKGETSIZE64_32: |
946e9937 | 717 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 718 | |
9b81648c | 719 | /* Incompatible alignment on i386 */ |
bdc1ddad | 720 | case BLKTRACESETUP32: |
9b81648c | 721 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 722 | default: |
9b81648c | 723 | break; |
bdc1ddad | 724 | } |
9b81648c | 725 | |
0f77b29a | 726 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
727 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
728 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
729 | ||
730 | return ret; | |
bdc1ddad AB |
731 | } |
732 | #endif |