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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 | |
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; | |
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 | { |
d8e4bb81 CH |
98 | uint64_t range[2]; |
99 | uint64_t start, len; | |
7607c44c | 100 | struct inode *inode = bdev->bd_inode; |
384d87ef | 101 | int err; |
d8e4bb81 | 102 | |
05bdb996 | 103 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
104 | return -EBADF; |
105 | ||
70200574 | 106 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 DM |
107 | return -EOPNOTSUPP; |
108 | ||
d8e4bb81 CH |
109 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
110 | return -EFAULT; | |
111 | ||
112 | start = range[0]; | |
113 | len = range[1]; | |
8d57a98c | 114 | |
d30a2605 DW |
115 | if (start & 511) |
116 | return -EINVAL; | |
117 | if (len & 511) | |
118 | return -EINVAL; | |
d30a2605 | 119 | |
946e9937 | 120 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 121 | return -EINVAL; |
384d87ef | 122 | |
7607c44c | 123 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
124 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
125 | if (err) | |
7607c44c | 126 | goto fail; |
44abff2c | 127 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); |
7607c44c SK |
128 | fail: |
129 | filemap_invalidate_unlock(inode->i_mapping); | |
130 | return err; | |
d30a2605 DW |
131 | } |
132 | ||
05bdb996 | 133 | static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, |
44abff2c CH |
134 | void __user *argp) |
135 | { | |
136 | uint64_t start, len; | |
137 | uint64_t range[2]; | |
138 | int err; | |
139 | ||
05bdb996 | 140 | if (!(mode & BLK_OPEN_WRITE)) |
44abff2c CH |
141 | return -EBADF; |
142 | if (!bdev_max_secure_erase_sectors(bdev)) | |
143 | return -EOPNOTSUPP; | |
144 | if (copy_from_user(range, argp, sizeof(range))) | |
145 | return -EFAULT; | |
146 | ||
147 | start = range[0]; | |
148 | len = range[1]; | |
149 | if ((start & 511) || (len & 511)) | |
150 | return -EINVAL; | |
151 | if (start + len > bdev_nr_bytes(bdev)) | |
152 | return -EINVAL; | |
153 | ||
154 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
155 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
156 | if (!err) | |
157 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
158 | GFP_KERNEL); | |
159 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
160 | return err; | |
161 | } | |
162 | ||
163 | ||
05bdb996 | 164 | static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 | 165 | unsigned long arg) |
66ba32dc | 166 | { |
d8e4bb81 | 167 | uint64_t range[2]; |
22dd6d35 | 168 | uint64_t start, end, len; |
35e4c6c1 | 169 | struct inode *inode = bdev->bd_inode; |
384d87ef | 170 | int err; |
d8e4bb81 | 171 | |
05bdb996 | 172 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
173 | return -EBADF; |
174 | ||
175 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
176 | return -EFAULT; | |
177 | ||
178 | start = range[0]; | |
179 | len = range[1]; | |
22dd6d35 | 180 | end = start + len - 1; |
d8e4bb81 | 181 | |
66ba32dc MP |
182 | if (start & 511) |
183 | return -EINVAL; | |
184 | if (len & 511) | |
185 | return -EINVAL; | |
946e9937 | 186 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
187 | return -EINVAL; |
188 | if (end < start) | |
66ba32dc MP |
189 | return -EINVAL; |
190 | ||
22dd6d35 | 191 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 192 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
193 | err = truncate_bdev_range(bdev, mode, start, end); |
194 | if (err) | |
35e4c6c1 SK |
195 | goto fail; |
196 | ||
197 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
198 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 199 | |
35e4c6c1 SK |
200 | fail: |
201 | filemap_invalidate_unlock(inode->i_mapping); | |
202 | return err; | |
66ba32dc MP |
203 | } |
204 | ||
9b81648c | 205 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 206 | { |
9b81648c | 207 | return put_user(val, argp); |
1da177e4 LT |
208 | } |
209 | ||
9b81648c | 210 | static int put_int(int __user *argp, int val) |
1da177e4 | 211 | { |
9b81648c | 212 | return put_user(val, argp); |
1da177e4 LT |
213 | } |
214 | ||
9b81648c | 215 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 216 | { |
9b81648c | 217 | return put_user(val, argp); |
ac481c20 MP |
218 | } |
219 | ||
9b81648c | 220 | static int put_long(long __user *argp, long val) |
1da177e4 | 221 | { |
9b81648c | 222 | return put_user(val, argp); |
1da177e4 LT |
223 | } |
224 | ||
9b81648c | 225 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 226 | { |
9b81648c | 227 | return put_user(val, argp); |
1da177e4 LT |
228 | } |
229 | ||
9b81648c | 230 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 231 | { |
9b81648c | 232 | return put_user(val, argp); |
1da177e4 LT |
233 | } |
234 | ||
bdc1ddad | 235 | #ifdef CONFIG_COMPAT |
c8210a57 | 236 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 237 | { |
9b81648c | 238 | return put_user(val, argp); |
bdc1ddad AB |
239 | } |
240 | ||
c8210a57 | 241 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 242 | { |
9b81648c | 243 | return put_user(val, argp); |
bdc1ddad AB |
244 | } |
245 | #endif | |
246 | ||
ee6a129d AB |
247 | #ifdef CONFIG_COMPAT |
248 | /* | |
249 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
250 | * drivers that implement only commands that are completely compatible | |
251 | * between 32-bit and 64-bit user space | |
252 | */ | |
05bdb996 | 253 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, |
ee6a129d AB |
254 | unsigned cmd, unsigned long arg) |
255 | { | |
256 | struct gendisk *disk = bdev->bd_disk; | |
257 | ||
258 | if (disk->fops->ioctl) | |
259 | return disk->fops->ioctl(bdev, mode, cmd, | |
260 | (unsigned long)compat_ptr(arg)); | |
261 | ||
262 | return -ENOIOCTLCMD; | |
263 | } | |
264 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
265 | #endif | |
266 | ||
9a72a024 | 267 | static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) |
12629621 JX |
268 | { |
269 | /* no sense to make reservations for partitions */ | |
270 | if (bdev_is_partition(bdev)) | |
271 | return false; | |
272 | ||
273 | if (capable(CAP_SYS_ADMIN)) | |
274 | return true; | |
9a72a024 JX |
275 | /* |
276 | * Only allow unprivileged reservations if the file descriptor is open | |
277 | * for writing. | |
278 | */ | |
279 | return mode & BLK_OPEN_WRITE; | |
12629621 JX |
280 | } |
281 | ||
9a72a024 | 282 | static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
283 | struct pr_registration __user *arg) |
284 | { | |
285 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
286 | struct pr_registration reg; | |
287 | ||
9a72a024 | 288 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
289 | return -EPERM; |
290 | if (!ops || !ops->pr_register) | |
291 | return -EOPNOTSUPP; | |
292 | if (copy_from_user(®, arg, sizeof(reg))) | |
293 | return -EFAULT; | |
294 | ||
295 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
296 | return -EOPNOTSUPP; | |
297 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
298 | } | |
299 | ||
9a72a024 | 300 | static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
301 | struct pr_reservation __user *arg) |
302 | { | |
303 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
304 | struct pr_reservation rsv; | |
305 | ||
9a72a024 | 306 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
307 | return -EPERM; |
308 | if (!ops || !ops->pr_reserve) | |
309 | return -EOPNOTSUPP; | |
310 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
311 | return -EFAULT; | |
312 | ||
313 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
314 | return -EOPNOTSUPP; | |
315 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
316 | } | |
317 | ||
9a72a024 | 318 | static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
319 | struct pr_reservation __user *arg) |
320 | { | |
321 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
322 | struct pr_reservation rsv; | |
323 | ||
9a72a024 | 324 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
325 | return -EPERM; |
326 | if (!ops || !ops->pr_release) | |
327 | return -EOPNOTSUPP; | |
328 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
329 | return -EFAULT; | |
330 | ||
331 | if (rsv.flags) | |
332 | return -EOPNOTSUPP; | |
333 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
334 | } | |
335 | ||
9a72a024 | 336 | static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
337 | struct pr_preempt __user *arg, bool abort) |
338 | { | |
339 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
340 | struct pr_preempt p; | |
341 | ||
9a72a024 | 342 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
343 | return -EPERM; |
344 | if (!ops || !ops->pr_preempt) | |
345 | return -EOPNOTSUPP; | |
346 | if (copy_from_user(&p, arg, sizeof(p))) | |
347 | return -EFAULT; | |
348 | ||
349 | if (p.flags) | |
350 | return -EOPNOTSUPP; | |
351 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
352 | } | |
353 | ||
9a72a024 | 354 | static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
355 | struct pr_clear __user *arg) |
356 | { | |
357 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
358 | struct pr_clear c; | |
359 | ||
9a72a024 | 360 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
361 | return -EPERM; |
362 | if (!ops || !ops->pr_clear) | |
363 | return -EOPNOTSUPP; | |
364 | if (copy_from_user(&c, arg, sizeof(c))) | |
365 | return -EFAULT; | |
366 | ||
367 | if (c.flags) | |
368 | return -EOPNOTSUPP; | |
369 | return ops->pr_clear(bdev, c.key); | |
370 | } | |
371 | ||
5e4ea834 CH |
372 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
373 | unsigned long arg) | |
bb93e3a5 | 374 | { |
d8e4bb81 CH |
375 | if (!capable(CAP_SYS_ADMIN)) |
376 | return -EACCES; | |
2142b88c CH |
377 | |
378 | mutex_lock(&bdev->bd_holder_lock); | |
379 | if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) | |
380 | bdev->bd_holder_ops->sync(bdev); | |
fd146410 JK |
381 | else { |
382 | mutex_unlock(&bdev->bd_holder_lock); | |
2142b88c | 383 | sync_blockdev(bdev); |
fd146410 | 384 | } |
2142b88c | 385 | |
d8e4bb81 CH |
386 | invalidate_bdev(bdev); |
387 | return 0; | |
388 | } | |
d30a2605 | 389 | |
5e4ea834 CH |
390 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
391 | unsigned long arg) | |
d8e4bb81 CH |
392 | { |
393 | int ret, n; | |
d30a2605 | 394 | |
bb749b31 ID |
395 | if (!capable(CAP_SYS_ADMIN)) |
396 | return -EACCES; | |
397 | ||
d8e4bb81 CH |
398 | if (get_user(n, (int __user *)arg)) |
399 | return -EFAULT; | |
e00adcad CH |
400 | if (bdev->bd_disk->fops->set_read_only) { |
401 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
402 | if (ret) | |
403 | return ret; | |
404 | } | |
83950d35 | 405 | bdev->bd_read_only = n; |
d8e4bb81 CH |
406 | return 0; |
407 | } | |
d30a2605 | 408 | |
d8e4bb81 CH |
409 | static int blkdev_getgeo(struct block_device *bdev, |
410 | struct hd_geometry __user *argp) | |
411 | { | |
412 | struct gendisk *disk = bdev->bd_disk; | |
413 | struct hd_geometry geo; | |
414 | int ret; | |
d30a2605 | 415 | |
d8e4bb81 CH |
416 | if (!argp) |
417 | return -EINVAL; | |
418 | if (!disk->fops->getgeo) | |
419 | return -ENOTTY; | |
420 | ||
421 | /* | |
422 | * We need to set the startsect first, the driver may | |
423 | * want to override it. | |
424 | */ | |
425 | memset(&geo, 0, sizeof(geo)); | |
426 | geo.start = get_start_sect(bdev); | |
427 | ret = disk->fops->getgeo(bdev, &geo); | |
428 | if (ret) | |
429 | return ret; | |
430 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
431 | return -EFAULT; | |
432 | return 0; | |
433 | } | |
66ba32dc | 434 | |
bdc1ddad AB |
435 | #ifdef CONFIG_COMPAT |
436 | struct compat_hd_geometry { | |
437 | unsigned char heads; | |
438 | unsigned char sectors; | |
439 | unsigned short cylinders; | |
440 | u32 start; | |
441 | }; | |
442 | ||
9b81648c AB |
443 | static int compat_hdio_getgeo(struct block_device *bdev, |
444 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 445 | { |
9b81648c | 446 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
447 | struct hd_geometry geo; |
448 | int ret; | |
449 | ||
450 | if (!ugeo) | |
451 | return -EINVAL; | |
452 | if (!disk->fops->getgeo) | |
453 | return -ENOTTY; | |
454 | ||
455 | memset(&geo, 0, sizeof(geo)); | |
456 | /* | |
457 | * We need to set the startsect first, the driver may | |
458 | * want to override it. | |
459 | */ | |
460 | geo.start = get_start_sect(bdev); | |
461 | ret = disk->fops->getgeo(bdev, &geo); | |
462 | if (ret) | |
463 | return ret; | |
464 | ||
465 | ret = copy_to_user(ugeo, &geo, 4); | |
466 | ret |= put_user(geo.start, &ugeo->start); | |
467 | if (ret) | |
468 | ret = -EFAULT; | |
469 | ||
470 | return ret; | |
471 | } | |
472 | #endif | |
473 | ||
d8e4bb81 | 474 | /* set the logical block size */ |
05bdb996 | 475 | static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 CH |
476 | int __user *argp) |
477 | { | |
478 | int ret, n; | |
e5ca9d39 | 479 | struct file *file; |
66ba32dc | 480 | |
d8e4bb81 CH |
481 | if (!capable(CAP_SYS_ADMIN)) |
482 | return -EACCES; | |
483 | if (!argp) | |
484 | return -EINVAL; | |
485 | if (get_user(n, argp)) | |
486 | return -EFAULT; | |
66ba32dc | 487 | |
05bdb996 | 488 | if (mode & BLK_OPEN_EXCL) |
47816282 | 489 | return set_blocksize(bdev, n); |
d30a2605 | 490 | |
e5ca9d39 CB |
491 | file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); |
492 | if (IS_ERR(file)) | |
47816282 | 493 | return -EBUSY; |
d8e4bb81 | 494 | ret = set_blocksize(bdev, n); |
e5ca9d39 | 495 | fput(file); |
d8e4bb81 CH |
496 | return ret; |
497 | } | |
a885c8c4 | 498 | |
d8e4bb81 | 499 | /* |
9b81648c AB |
500 | * Common commands that are handled the same way on native and compat |
501 | * user space. Note the separate arg/argp parameters that are needed | |
502 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 503 | */ |
05bdb996 | 504 | static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, |
0f77b29a YK |
505 | unsigned int cmd, unsigned long arg, |
506 | void __user *argp) | |
d8e4bb81 | 507 | { |
d8e4bb81 CH |
508 | unsigned int max_sectors; |
509 | ||
510 | switch (cmd) { | |
511 | case BLKFLSBUF: | |
5e4ea834 | 512 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 513 | case BLKROSET: |
5e4ea834 | 514 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 515 | case BLKDISCARD: |
44abff2c | 516 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 517 | case BLKSECDISCARD: |
44abff2c | 518 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
519 | case BLKZEROOUT: |
520 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
521 | case BLKGETDISKSEQ: |
522 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 523 | case BLKREPORTZONE: |
5e4ea834 | 524 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 525 | case BLKRESETZONE: |
e876df1f AJ |
526 | case BLKOPENZONE: |
527 | case BLKCLOSEZONE: | |
528 | case BLKFINISHZONE: | |
529 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 530 | case BLKGETZONESZ: |
9b81648c | 531 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 532 | case BLKGETNRZONES: |
b623e347 | 533 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 534 | case BLKROGET: |
9b81648c | 535 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 536 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 537 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 538 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 539 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 540 | case BLKIOMIN: |
9b81648c | 541 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 542 | case BLKIOOPT: |
9b81648c | 543 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 544 | case BLKALIGNOFF: |
9b81648c | 545 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 546 | case BLKDISCARDZEROES: |
9b81648c | 547 | return put_uint(argp, 0); |
45048d09 | 548 | case BLKSECTGET: |
63f26496 AM |
549 | max_sectors = min_t(unsigned int, USHRT_MAX, |
550 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 551 | return put_ushort(argp, max_sectors); |
ef00f59c | 552 | case BLKROTATIONAL: |
10f0d2a5 | 553 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
554 | case BLKRASET: |
555 | case BLKFRASET: | |
556 | if(!capable(CAP_SYS_ADMIN)) | |
557 | return -EACCES; | |
a11d7fc2 | 558 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 559 | return 0; |
45048d09 | 560 | case BLKRRPART: |
e16e506c CH |
561 | if (!capable(CAP_SYS_ADMIN)) |
562 | return -EACCES; | |
563 | if (bdev_is_partition(bdev)) | |
564 | return -EINVAL; | |
e5cfefa9 | 565 | return disk_scan_partitions(bdev->bd_disk, mode); |
45048d09 AV |
566 | case BLKTRACESTART: |
567 | case BLKTRACESTOP: | |
45048d09 | 568 | case BLKTRACETEARDOWN: |
d8e4bb81 | 569 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 | 570 | case IOC_PR_REGISTER: |
9a72a024 | 571 | return blkdev_pr_register(bdev, mode, argp); |
bbd3e064 | 572 | case IOC_PR_RESERVE: |
9a72a024 | 573 | return blkdev_pr_reserve(bdev, mode, argp); |
bbd3e064 | 574 | case IOC_PR_RELEASE: |
9a72a024 | 575 | return blkdev_pr_release(bdev, mode, argp); |
bbd3e064 | 576 | case IOC_PR_PREEMPT: |
9a72a024 | 577 | return blkdev_pr_preempt(bdev, mode, argp, false); |
bbd3e064 | 578 | case IOC_PR_PREEMPT_ABORT: |
9a72a024 | 579 | return blkdev_pr_preempt(bdev, mode, argp, true); |
bbd3e064 | 580 | case IOC_PR_CLEAR: |
9a72a024 | 581 | return blkdev_pr_clear(bdev, mode, argp); |
45048d09 | 582 | default: |
9b81648c | 583 | return -ENOIOCTLCMD; |
45048d09 | 584 | } |
1da177e4 | 585 | } |
9b81648c AB |
586 | |
587 | /* | |
588 | * Always keep this in sync with compat_blkdev_ioctl() | |
589 | * to handle all incompatible commands in both functions. | |
590 | * | |
591 | * New commands must be compatible and go into blkdev_common_ioctl | |
592 | */ | |
8a709512 | 593 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 594 | { |
8a709512 | 595 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 596 | void __user *argp = (void __user *)arg; |
05bdb996 | 597 | blk_mode_t mode = file_to_blk_mode(file); |
8a709512 CH |
598 | int ret; |
599 | ||
9b81648c AB |
600 | switch (cmd) { |
601 | /* These need separate implementations for the data structure */ | |
602 | case HDIO_GETGEO: | |
603 | return blkdev_getgeo(bdev, argp); | |
604 | case BLKPG: | |
605 | return blkpg_ioctl(bdev, argp); | |
606 | ||
607 | /* Compat mode returns 32-bit data instead of 'long' */ | |
608 | case BLKRAGET: | |
609 | case BLKFRAGET: | |
610 | if (!argp) | |
611 | return -EINVAL; | |
a11d7fc2 CH |
612 | return put_long(argp, |
613 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 614 | case BLKGETSIZE: |
946e9937 | 615 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 616 | return -EFBIG; |
946e9937 | 617 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
618 | |
619 | /* The data is compatible, but the command number is different */ | |
620 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
621 | return put_int(argp, block_size(bdev)); | |
622 | case BLKBSZSET: | |
623 | return blkdev_bszset(bdev, mode, argp); | |
624 | case BLKGETSIZE64: | |
946e9937 | 625 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
626 | |
627 | /* Incompatible alignment on i386 */ | |
628 | case BLKTRACESETUP: | |
629 | return blk_trace_ioctl(bdev, cmd, argp); | |
630 | default: | |
631 | break; | |
632 | } | |
633 | ||
0f77b29a | 634 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
635 | if (ret != -ENOIOCTLCMD) |
636 | return ret; | |
9b81648c | 637 | |
a7cb3d2f CH |
638 | if (!bdev->bd_disk->fops->ioctl) |
639 | return -ENOTTY; | |
640 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 641 | } |
bdc1ddad AB |
642 | |
643 | #ifdef CONFIG_COMPAT | |
9b81648c | 644 | |
bdc1ddad AB |
645 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
646 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
647 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
648 | ||
649 | /* Most of the generic ioctls are handled in the normal fallback path. | |
650 | This assumes the blkdev's low level compat_ioctl always returns | |
651 | ENOIOCTLCMD for unknown ioctls. */ | |
652 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
653 | { | |
9b81648c AB |
654 | int ret; |
655 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 656 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad | 657 | struct gendisk *disk = bdev->bd_disk; |
05bdb996 | 658 | blk_mode_t mode = file_to_blk_mode(file); |
bdc1ddad AB |
659 | |
660 | switch (cmd) { | |
9b81648c | 661 | /* These need separate implementations for the data structure */ |
bdc1ddad | 662 | case HDIO_GETGEO: |
9b81648c | 663 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 664 | case BLKPG: |
9b81648c AB |
665 | return compat_blkpg_ioctl(bdev, argp); |
666 | ||
667 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
668 | case BLKRAGET: |
669 | case BLKFRAGET: | |
9b81648c | 670 | if (!argp) |
bdc1ddad | 671 | return -EINVAL; |
9b81648c | 672 | return compat_put_long(argp, |
a11d7fc2 | 673 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 674 | case BLKGETSIZE: |
ccf16413 | 675 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 676 | return -EFBIG; |
946e9937 | 677 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 678 | |
9b81648c AB |
679 | /* The data is compatible, but the command number is different */ |
680 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
681 | return put_int(argp, bdev_logical_block_size(bdev)); | |
682 | case BLKBSZSET_32: | |
683 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 684 | case BLKGETSIZE64_32: |
946e9937 | 685 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 686 | |
9b81648c | 687 | /* Incompatible alignment on i386 */ |
bdc1ddad | 688 | case BLKTRACESETUP32: |
9b81648c | 689 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 690 | default: |
9b81648c | 691 | break; |
bdc1ddad | 692 | } |
9b81648c | 693 | |
0f77b29a | 694 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
695 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
696 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
697 | ||
698 | return ret; | |
bdc1ddad AB |
699 | } |
700 | #endif |