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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; |
6f64f866 | 21 | sector_t start, length; |
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 | |
6f64f866 ML |
36 | if (p.start < 0 || p.length <= 0 || p.start + p.length < 0) |
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; | |
e71bf0d0 | 44 | |
fa9156ae CH |
45 | switch (op) { |
46 | case BLKPG_ADD_PARTITION: | |
7f6be376 | 47 | return bdev_add_partition(disk, p.pno, start, length); |
fa9156ae | 48 | case BLKPG_RESIZE_PARTITION: |
3d2e7989 | 49 | return bdev_resize_partition(disk, p.pno, start, length); |
fa9156ae CH |
50 | default: |
51 | return -EINVAL; | |
1da177e4 LT |
52 | } |
53 | } | |
54 | ||
5fb889f5 AB |
55 | static int blkpg_ioctl(struct block_device *bdev, |
56 | struct blkpg_ioctl_arg __user *arg) | |
57 | { | |
58 | struct blkpg_partition __user *udata; | |
59 | int op; | |
60 | ||
61 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
62 | return -EFAULT; | |
63 | ||
64 | return blkpg_do_ioctl(bdev, udata, op); | |
65 | } | |
66 | ||
67 | #ifdef CONFIG_COMPAT | |
68 | struct compat_blkpg_ioctl_arg { | |
69 | compat_int_t op; | |
70 | compat_int_t flags; | |
71 | compat_int_t datalen; | |
72 | compat_caddr_t data; | |
73 | }; | |
74 | ||
75 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
76 | struct compat_blkpg_ioctl_arg __user *arg) | |
77 | { | |
78 | compat_caddr_t udata; | |
79 | int op; | |
80 | ||
81 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
82 | return -EFAULT; | |
83 | ||
84 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
85 | } | |
86 | #endif | |
87 | ||
05bdb996 | 88 | static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode, |
44abff2c | 89 | unsigned long arg) |
d30a2605 | 90 | { |
d8e4bb81 CH |
91 | uint64_t range[2]; |
92 | uint64_t start, len; | |
7607c44c | 93 | struct inode *inode = bdev->bd_inode; |
384d87ef | 94 | int err; |
d8e4bb81 | 95 | |
05bdb996 | 96 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
97 | return -EBADF; |
98 | ||
70200574 | 99 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 DM |
100 | return -EOPNOTSUPP; |
101 | ||
d8e4bb81 CH |
102 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
103 | return -EFAULT; | |
104 | ||
105 | start = range[0]; | |
106 | len = range[1]; | |
8d57a98c | 107 | |
d30a2605 DW |
108 | if (start & 511) |
109 | return -EINVAL; | |
110 | if (len & 511) | |
111 | return -EINVAL; | |
d30a2605 | 112 | |
946e9937 | 113 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 114 | return -EINVAL; |
384d87ef | 115 | |
7607c44c | 116 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
117 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
118 | if (err) | |
7607c44c | 119 | goto fail; |
44abff2c | 120 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); |
7607c44c SK |
121 | fail: |
122 | filemap_invalidate_unlock(inode->i_mapping); | |
123 | return err; | |
d30a2605 DW |
124 | } |
125 | ||
05bdb996 | 126 | static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, |
44abff2c CH |
127 | void __user *argp) |
128 | { | |
129 | uint64_t start, len; | |
130 | uint64_t range[2]; | |
131 | int err; | |
132 | ||
05bdb996 | 133 | if (!(mode & BLK_OPEN_WRITE)) |
44abff2c CH |
134 | return -EBADF; |
135 | if (!bdev_max_secure_erase_sectors(bdev)) | |
136 | return -EOPNOTSUPP; | |
137 | if (copy_from_user(range, argp, sizeof(range))) | |
138 | return -EFAULT; | |
139 | ||
140 | start = range[0]; | |
141 | len = range[1]; | |
142 | if ((start & 511) || (len & 511)) | |
143 | return -EINVAL; | |
144 | if (start + len > bdev_nr_bytes(bdev)) | |
145 | return -EINVAL; | |
146 | ||
147 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
148 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
149 | if (!err) | |
150 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
151 | GFP_KERNEL); | |
152 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
153 | return err; | |
154 | } | |
155 | ||
156 | ||
05bdb996 | 157 | static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 | 158 | unsigned long arg) |
66ba32dc | 159 | { |
d8e4bb81 | 160 | uint64_t range[2]; |
22dd6d35 | 161 | uint64_t start, end, len; |
35e4c6c1 | 162 | struct inode *inode = bdev->bd_inode; |
384d87ef | 163 | int err; |
d8e4bb81 | 164 | |
05bdb996 | 165 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
166 | return -EBADF; |
167 | ||
168 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
169 | return -EFAULT; | |
170 | ||
171 | start = range[0]; | |
172 | len = range[1]; | |
22dd6d35 | 173 | end = start + len - 1; |
d8e4bb81 | 174 | |
66ba32dc MP |
175 | if (start & 511) |
176 | return -EINVAL; | |
177 | if (len & 511) | |
178 | return -EINVAL; | |
946e9937 | 179 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
180 | return -EINVAL; |
181 | if (end < start) | |
66ba32dc MP |
182 | return -EINVAL; |
183 | ||
22dd6d35 | 184 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 185 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
186 | err = truncate_bdev_range(bdev, mode, start, end); |
187 | if (err) | |
35e4c6c1 SK |
188 | goto fail; |
189 | ||
190 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
191 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 192 | |
35e4c6c1 SK |
193 | fail: |
194 | filemap_invalidate_unlock(inode->i_mapping); | |
195 | return err; | |
66ba32dc MP |
196 | } |
197 | ||
9b81648c | 198 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 199 | { |
9b81648c | 200 | return put_user(val, argp); |
1da177e4 LT |
201 | } |
202 | ||
9b81648c | 203 | static int put_int(int __user *argp, int val) |
1da177e4 | 204 | { |
9b81648c | 205 | return put_user(val, argp); |
1da177e4 LT |
206 | } |
207 | ||
9b81648c | 208 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 209 | { |
9b81648c | 210 | return put_user(val, argp); |
ac481c20 MP |
211 | } |
212 | ||
9b81648c | 213 | static int put_long(long __user *argp, long val) |
1da177e4 | 214 | { |
9b81648c | 215 | return put_user(val, argp); |
1da177e4 LT |
216 | } |
217 | ||
9b81648c | 218 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 219 | { |
9b81648c | 220 | return put_user(val, argp); |
1da177e4 LT |
221 | } |
222 | ||
9b81648c | 223 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 224 | { |
9b81648c | 225 | return put_user(val, argp); |
1da177e4 LT |
226 | } |
227 | ||
bdc1ddad | 228 | #ifdef CONFIG_COMPAT |
c8210a57 | 229 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 230 | { |
9b81648c | 231 | return put_user(val, argp); |
bdc1ddad AB |
232 | } |
233 | ||
c8210a57 | 234 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 235 | { |
9b81648c | 236 | return put_user(val, argp); |
bdc1ddad AB |
237 | } |
238 | #endif | |
239 | ||
ee6a129d AB |
240 | #ifdef CONFIG_COMPAT |
241 | /* | |
242 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
243 | * drivers that implement only commands that are completely compatible | |
244 | * between 32-bit and 64-bit user space | |
245 | */ | |
05bdb996 | 246 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, |
ee6a129d AB |
247 | unsigned cmd, unsigned long arg) |
248 | { | |
249 | struct gendisk *disk = bdev->bd_disk; | |
250 | ||
251 | if (disk->fops->ioctl) | |
252 | return disk->fops->ioctl(bdev, mode, cmd, | |
253 | (unsigned long)compat_ptr(arg)); | |
254 | ||
255 | return -ENOIOCTLCMD; | |
256 | } | |
257 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
258 | #endif | |
259 | ||
9a72a024 | 260 | static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) |
12629621 JX |
261 | { |
262 | /* no sense to make reservations for partitions */ | |
263 | if (bdev_is_partition(bdev)) | |
264 | return false; | |
265 | ||
266 | if (capable(CAP_SYS_ADMIN)) | |
267 | return true; | |
9a72a024 JX |
268 | /* |
269 | * Only allow unprivileged reservations if the file descriptor is open | |
270 | * for writing. | |
271 | */ | |
272 | return mode & BLK_OPEN_WRITE; | |
12629621 JX |
273 | } |
274 | ||
9a72a024 | 275 | static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
276 | struct pr_registration __user *arg) |
277 | { | |
278 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
279 | struct pr_registration reg; | |
280 | ||
9a72a024 | 281 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
282 | return -EPERM; |
283 | if (!ops || !ops->pr_register) | |
284 | return -EOPNOTSUPP; | |
285 | if (copy_from_user(®, arg, sizeof(reg))) | |
286 | return -EFAULT; | |
287 | ||
288 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
289 | return -EOPNOTSUPP; | |
290 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
291 | } | |
292 | ||
9a72a024 | 293 | static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
294 | struct pr_reservation __user *arg) |
295 | { | |
296 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
297 | struct pr_reservation rsv; | |
298 | ||
9a72a024 | 299 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
300 | return -EPERM; |
301 | if (!ops || !ops->pr_reserve) | |
302 | return -EOPNOTSUPP; | |
303 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
304 | return -EFAULT; | |
305 | ||
306 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
307 | return -EOPNOTSUPP; | |
308 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
309 | } | |
310 | ||
9a72a024 | 311 | static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
312 | struct pr_reservation __user *arg) |
313 | { | |
314 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
315 | struct pr_reservation rsv; | |
316 | ||
9a72a024 | 317 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
318 | return -EPERM; |
319 | if (!ops || !ops->pr_release) | |
320 | return -EOPNOTSUPP; | |
321 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
322 | return -EFAULT; | |
323 | ||
324 | if (rsv.flags) | |
325 | return -EOPNOTSUPP; | |
326 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
327 | } | |
328 | ||
9a72a024 | 329 | static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
330 | struct pr_preempt __user *arg, bool abort) |
331 | { | |
332 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
333 | struct pr_preempt p; | |
334 | ||
9a72a024 | 335 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
336 | return -EPERM; |
337 | if (!ops || !ops->pr_preempt) | |
338 | return -EOPNOTSUPP; | |
339 | if (copy_from_user(&p, arg, sizeof(p))) | |
340 | return -EFAULT; | |
341 | ||
342 | if (p.flags) | |
343 | return -EOPNOTSUPP; | |
344 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
345 | } | |
346 | ||
9a72a024 | 347 | static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
348 | struct pr_clear __user *arg) |
349 | { | |
350 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
351 | struct pr_clear c; | |
352 | ||
9a72a024 | 353 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
354 | return -EPERM; |
355 | if (!ops || !ops->pr_clear) | |
356 | return -EOPNOTSUPP; | |
357 | if (copy_from_user(&c, arg, sizeof(c))) | |
358 | return -EFAULT; | |
359 | ||
360 | if (c.flags) | |
361 | return -EOPNOTSUPP; | |
362 | return ops->pr_clear(bdev, c.key); | |
363 | } | |
364 | ||
5e4ea834 CH |
365 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
366 | unsigned long arg) | |
bb93e3a5 | 367 | { |
d8e4bb81 CH |
368 | if (!capable(CAP_SYS_ADMIN)) |
369 | return -EACCES; | |
2142b88c CH |
370 | |
371 | mutex_lock(&bdev->bd_holder_lock); | |
372 | if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) | |
373 | bdev->bd_holder_ops->sync(bdev); | |
fd146410 JK |
374 | else { |
375 | mutex_unlock(&bdev->bd_holder_lock); | |
2142b88c | 376 | sync_blockdev(bdev); |
fd146410 | 377 | } |
2142b88c | 378 | |
d8e4bb81 CH |
379 | invalidate_bdev(bdev); |
380 | return 0; | |
381 | } | |
d30a2605 | 382 | |
5e4ea834 CH |
383 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
384 | unsigned long arg) | |
d8e4bb81 CH |
385 | { |
386 | int ret, n; | |
d30a2605 | 387 | |
bb749b31 ID |
388 | if (!capable(CAP_SYS_ADMIN)) |
389 | return -EACCES; | |
390 | ||
d8e4bb81 CH |
391 | if (get_user(n, (int __user *)arg)) |
392 | return -EFAULT; | |
e00adcad CH |
393 | if (bdev->bd_disk->fops->set_read_only) { |
394 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
395 | if (ret) | |
396 | return ret; | |
397 | } | |
83950d35 | 398 | bdev->bd_read_only = n; |
d8e4bb81 CH |
399 | return 0; |
400 | } | |
d30a2605 | 401 | |
d8e4bb81 CH |
402 | static int blkdev_getgeo(struct block_device *bdev, |
403 | struct hd_geometry __user *argp) | |
404 | { | |
405 | struct gendisk *disk = bdev->bd_disk; | |
406 | struct hd_geometry geo; | |
407 | int ret; | |
d30a2605 | 408 | |
d8e4bb81 CH |
409 | if (!argp) |
410 | return -EINVAL; | |
411 | if (!disk->fops->getgeo) | |
412 | return -ENOTTY; | |
413 | ||
414 | /* | |
415 | * We need to set the startsect first, the driver may | |
416 | * want to override it. | |
417 | */ | |
418 | memset(&geo, 0, sizeof(geo)); | |
419 | geo.start = get_start_sect(bdev); | |
420 | ret = disk->fops->getgeo(bdev, &geo); | |
421 | if (ret) | |
422 | return ret; | |
423 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
424 | return -EFAULT; | |
425 | return 0; | |
426 | } | |
66ba32dc | 427 | |
bdc1ddad AB |
428 | #ifdef CONFIG_COMPAT |
429 | struct compat_hd_geometry { | |
430 | unsigned char heads; | |
431 | unsigned char sectors; | |
432 | unsigned short cylinders; | |
433 | u32 start; | |
434 | }; | |
435 | ||
9b81648c AB |
436 | static int compat_hdio_getgeo(struct block_device *bdev, |
437 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 438 | { |
9b81648c | 439 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
440 | struct hd_geometry geo; |
441 | int ret; | |
442 | ||
443 | if (!ugeo) | |
444 | return -EINVAL; | |
445 | if (!disk->fops->getgeo) | |
446 | return -ENOTTY; | |
447 | ||
448 | memset(&geo, 0, sizeof(geo)); | |
449 | /* | |
450 | * We need to set the startsect first, the driver may | |
451 | * want to override it. | |
452 | */ | |
453 | geo.start = get_start_sect(bdev); | |
454 | ret = disk->fops->getgeo(bdev, &geo); | |
455 | if (ret) | |
456 | return ret; | |
457 | ||
458 | ret = copy_to_user(ugeo, &geo, 4); | |
459 | ret |= put_user(geo.start, &ugeo->start); | |
460 | if (ret) | |
461 | ret = -EFAULT; | |
462 | ||
463 | return ret; | |
464 | } | |
465 | #endif | |
466 | ||
d8e4bb81 | 467 | /* set the logical block size */ |
05bdb996 | 468 | static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 CH |
469 | int __user *argp) |
470 | { | |
471 | int ret, n; | |
e5ca9d39 | 472 | struct file *file; |
66ba32dc | 473 | |
d8e4bb81 CH |
474 | if (!capable(CAP_SYS_ADMIN)) |
475 | return -EACCES; | |
476 | if (!argp) | |
477 | return -EINVAL; | |
478 | if (get_user(n, argp)) | |
479 | return -EFAULT; | |
66ba32dc | 480 | |
05bdb996 | 481 | if (mode & BLK_OPEN_EXCL) |
47816282 | 482 | return set_blocksize(bdev, n); |
d30a2605 | 483 | |
e5ca9d39 CB |
484 | file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); |
485 | if (IS_ERR(file)) | |
47816282 | 486 | return -EBUSY; |
d8e4bb81 | 487 | ret = set_blocksize(bdev, n); |
e5ca9d39 | 488 | fput(file); |
d8e4bb81 CH |
489 | return ret; |
490 | } | |
a885c8c4 | 491 | |
d8e4bb81 | 492 | /* |
9b81648c AB |
493 | * Common commands that are handled the same way on native and compat |
494 | * user space. Note the separate arg/argp parameters that are needed | |
495 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 496 | */ |
05bdb996 | 497 | static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, |
0f77b29a YK |
498 | unsigned int cmd, unsigned long arg, |
499 | void __user *argp) | |
d8e4bb81 | 500 | { |
d8e4bb81 CH |
501 | unsigned int max_sectors; |
502 | ||
503 | switch (cmd) { | |
504 | case BLKFLSBUF: | |
5e4ea834 | 505 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 506 | case BLKROSET: |
5e4ea834 | 507 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 508 | case BLKDISCARD: |
44abff2c | 509 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 510 | case BLKSECDISCARD: |
44abff2c | 511 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
512 | case BLKZEROOUT: |
513 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
514 | case BLKGETDISKSEQ: |
515 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 516 | case BLKREPORTZONE: |
5e4ea834 | 517 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 518 | case BLKRESETZONE: |
e876df1f AJ |
519 | case BLKOPENZONE: |
520 | case BLKCLOSEZONE: | |
521 | case BLKFINISHZONE: | |
522 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 523 | case BLKGETZONESZ: |
9b81648c | 524 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 525 | case BLKGETNRZONES: |
b623e347 | 526 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 527 | case BLKROGET: |
9b81648c | 528 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 529 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 530 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 531 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 532 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 533 | case BLKIOMIN: |
9b81648c | 534 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 535 | case BLKIOOPT: |
9b81648c | 536 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 537 | case BLKALIGNOFF: |
9b81648c | 538 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 539 | case BLKDISCARDZEROES: |
9b81648c | 540 | return put_uint(argp, 0); |
45048d09 | 541 | case BLKSECTGET: |
63f26496 AM |
542 | max_sectors = min_t(unsigned int, USHRT_MAX, |
543 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 544 | return put_ushort(argp, max_sectors); |
ef00f59c | 545 | case BLKROTATIONAL: |
10f0d2a5 | 546 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
547 | case BLKRASET: |
548 | case BLKFRASET: | |
549 | if(!capable(CAP_SYS_ADMIN)) | |
550 | return -EACCES; | |
a11d7fc2 | 551 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 552 | return 0; |
45048d09 | 553 | case BLKRRPART: |
e16e506c CH |
554 | if (!capable(CAP_SYS_ADMIN)) |
555 | return -EACCES; | |
556 | if (bdev_is_partition(bdev)) | |
557 | return -EINVAL; | |
e5cfefa9 | 558 | return disk_scan_partitions(bdev->bd_disk, mode); |
45048d09 AV |
559 | case BLKTRACESTART: |
560 | case BLKTRACESTOP: | |
45048d09 | 561 | case BLKTRACETEARDOWN: |
d8e4bb81 | 562 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 | 563 | case IOC_PR_REGISTER: |
9a72a024 | 564 | return blkdev_pr_register(bdev, mode, argp); |
bbd3e064 | 565 | case IOC_PR_RESERVE: |
9a72a024 | 566 | return blkdev_pr_reserve(bdev, mode, argp); |
bbd3e064 | 567 | case IOC_PR_RELEASE: |
9a72a024 | 568 | return blkdev_pr_release(bdev, mode, argp); |
bbd3e064 | 569 | case IOC_PR_PREEMPT: |
9a72a024 | 570 | return blkdev_pr_preempt(bdev, mode, argp, false); |
bbd3e064 | 571 | case IOC_PR_PREEMPT_ABORT: |
9a72a024 | 572 | return blkdev_pr_preempt(bdev, mode, argp, true); |
bbd3e064 | 573 | case IOC_PR_CLEAR: |
9a72a024 | 574 | return blkdev_pr_clear(bdev, mode, argp); |
45048d09 | 575 | default: |
9b81648c | 576 | return -ENOIOCTLCMD; |
45048d09 | 577 | } |
1da177e4 | 578 | } |
9b81648c AB |
579 | |
580 | /* | |
581 | * Always keep this in sync with compat_blkdev_ioctl() | |
582 | * to handle all incompatible commands in both functions. | |
583 | * | |
584 | * New commands must be compatible and go into blkdev_common_ioctl | |
585 | */ | |
8a709512 | 586 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 587 | { |
8a709512 | 588 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 589 | void __user *argp = (void __user *)arg; |
05bdb996 | 590 | blk_mode_t mode = file_to_blk_mode(file); |
8a709512 CH |
591 | int ret; |
592 | ||
9b81648c AB |
593 | switch (cmd) { |
594 | /* These need separate implementations for the data structure */ | |
595 | case HDIO_GETGEO: | |
596 | return blkdev_getgeo(bdev, argp); | |
597 | case BLKPG: | |
598 | return blkpg_ioctl(bdev, argp); | |
599 | ||
600 | /* Compat mode returns 32-bit data instead of 'long' */ | |
601 | case BLKRAGET: | |
602 | case BLKFRAGET: | |
603 | if (!argp) | |
604 | return -EINVAL; | |
a11d7fc2 CH |
605 | return put_long(argp, |
606 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 607 | case BLKGETSIZE: |
946e9937 | 608 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 609 | return -EFBIG; |
946e9937 | 610 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
611 | |
612 | /* The data is compatible, but the command number is different */ | |
613 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
614 | return put_int(argp, block_size(bdev)); | |
615 | case BLKBSZSET: | |
616 | return blkdev_bszset(bdev, mode, argp); | |
617 | case BLKGETSIZE64: | |
946e9937 | 618 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
619 | |
620 | /* Incompatible alignment on i386 */ | |
621 | case BLKTRACESETUP: | |
622 | return blk_trace_ioctl(bdev, cmd, argp); | |
623 | default: | |
624 | break; | |
625 | } | |
626 | ||
0f77b29a | 627 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
628 | if (ret != -ENOIOCTLCMD) |
629 | return ret; | |
9b81648c | 630 | |
a7cb3d2f CH |
631 | if (!bdev->bd_disk->fops->ioctl) |
632 | return -ENOTTY; | |
633 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 634 | } |
bdc1ddad AB |
635 | |
636 | #ifdef CONFIG_COMPAT | |
9b81648c | 637 | |
bdc1ddad AB |
638 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
639 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
640 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
641 | ||
642 | /* Most of the generic ioctls are handled in the normal fallback path. | |
643 | This assumes the blkdev's low level compat_ioctl always returns | |
644 | ENOIOCTLCMD for unknown ioctls. */ | |
645 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
646 | { | |
9b81648c AB |
647 | int ret; |
648 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 649 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad | 650 | struct gendisk *disk = bdev->bd_disk; |
05bdb996 | 651 | blk_mode_t mode = file_to_blk_mode(file); |
bdc1ddad AB |
652 | |
653 | switch (cmd) { | |
9b81648c | 654 | /* These need separate implementations for the data structure */ |
bdc1ddad | 655 | case HDIO_GETGEO: |
9b81648c | 656 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 657 | case BLKPG: |
9b81648c AB |
658 | return compat_blkpg_ioctl(bdev, argp); |
659 | ||
660 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
661 | case BLKRAGET: |
662 | case BLKFRAGET: | |
9b81648c | 663 | if (!argp) |
bdc1ddad | 664 | return -EINVAL; |
9b81648c | 665 | return compat_put_long(argp, |
a11d7fc2 | 666 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 667 | case BLKGETSIZE: |
ccf16413 | 668 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 669 | return -EFBIG; |
946e9937 | 670 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 671 | |
9b81648c AB |
672 | /* The data is compatible, but the command number is different */ |
673 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
674 | return put_int(argp, bdev_logical_block_size(bdev)); | |
675 | case BLKBSZSET_32: | |
676 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 677 | case BLKGETSIZE64_32: |
946e9937 | 678 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 679 | |
9b81648c | 680 | /* Incompatible alignment on i386 */ |
bdc1ddad | 681 | case BLKTRACESETUP32: |
9b81648c | 682 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 683 | default: |
9b81648c | 684 | break; |
bdc1ddad | 685 | } |
9b81648c | 686 | |
0f77b29a | 687 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
688 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
689 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
690 | ||
691 | return ret; | |
bdc1ddad AB |
692 | } |
693 | #endif |