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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 | 22 | |
1a721de8 LL |
23 | if (disk->flags & GENHD_FL_NO_PART) |
24 | return -EINVAL; | |
1da177e4 LT |
25 | if (!capable(CAP_SYS_ADMIN)) |
26 | return -EACCES; | |
5fb889f5 | 27 | if (copy_from_user(&p, upart, sizeof(struct blkpg_partition))) |
1da177e4 | 28 | return -EFAULT; |
fa01b1e9 | 29 | if (bdev_is_partition(bdev)) |
1da177e4 | 30 | return -EINVAL; |
88e34126 | 31 | |
fa9156ae CH |
32 | if (p.pno <= 0) |
33 | return -EINVAL; | |
e71bf0d0 | 34 | |
fa9156ae | 35 | if (op == BLKPG_DEL_PARTITION) |
926fbb16 | 36 | return bdev_del_partition(disk, p.pno); |
e71bf0d0 | 37 | |
6f64f866 ML |
38 | if (p.start < 0 || p.length <= 0 || p.start + p.length < 0) |
39 | return -EINVAL; | |
40 | /* Check that the partition is aligned to the block size */ | |
41 | if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev))) | |
42 | return -EINVAL; | |
43 | ||
fa9156ae CH |
44 | start = p.start >> SECTOR_SHIFT; |
45 | length = p.length >> SECTOR_SHIFT; | |
e71bf0d0 | 46 | |
fa9156ae CH |
47 | switch (op) { |
48 | case BLKPG_ADD_PARTITION: | |
7f6be376 | 49 | return bdev_add_partition(disk, p.pno, start, length); |
fa9156ae | 50 | case BLKPG_RESIZE_PARTITION: |
3d2e7989 | 51 | return bdev_resize_partition(disk, p.pno, start, length); |
fa9156ae CH |
52 | default: |
53 | return -EINVAL; | |
1da177e4 LT |
54 | } |
55 | } | |
56 | ||
5fb889f5 AB |
57 | static int blkpg_ioctl(struct block_device *bdev, |
58 | struct blkpg_ioctl_arg __user *arg) | |
59 | { | |
60 | struct blkpg_partition __user *udata; | |
61 | int op; | |
62 | ||
63 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
64 | return -EFAULT; | |
65 | ||
66 | return blkpg_do_ioctl(bdev, udata, op); | |
67 | } | |
68 | ||
69 | #ifdef CONFIG_COMPAT | |
70 | struct compat_blkpg_ioctl_arg { | |
71 | compat_int_t op; | |
72 | compat_int_t flags; | |
73 | compat_int_t datalen; | |
74 | compat_caddr_t data; | |
75 | }; | |
76 | ||
77 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
78 | struct compat_blkpg_ioctl_arg __user *arg) | |
79 | { | |
80 | compat_caddr_t udata; | |
81 | int op; | |
82 | ||
83 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
84 | return -EFAULT; | |
85 | ||
86 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
87 | } | |
88 | #endif | |
89 | ||
05bdb996 | 90 | static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode, |
44abff2c | 91 | unsigned long arg) |
d30a2605 | 92 | { |
d8e4bb81 CH |
93 | uint64_t range[2]; |
94 | uint64_t start, len; | |
7607c44c | 95 | struct inode *inode = bdev->bd_inode; |
384d87ef | 96 | int err; |
d8e4bb81 | 97 | |
05bdb996 | 98 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
99 | return -EBADF; |
100 | ||
70200574 | 101 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 DM |
102 | return -EOPNOTSUPP; |
103 | ||
d8e4bb81 CH |
104 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
105 | return -EFAULT; | |
106 | ||
107 | start = range[0]; | |
108 | len = range[1]; | |
8d57a98c | 109 | |
d30a2605 DW |
110 | if (start & 511) |
111 | return -EINVAL; | |
112 | if (len & 511) | |
113 | return -EINVAL; | |
d30a2605 | 114 | |
946e9937 | 115 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 116 | return -EINVAL; |
384d87ef | 117 | |
7607c44c | 118 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
119 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
120 | if (err) | |
7607c44c | 121 | goto fail; |
44abff2c | 122 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); |
7607c44c SK |
123 | fail: |
124 | filemap_invalidate_unlock(inode->i_mapping); | |
125 | return err; | |
d30a2605 DW |
126 | } |
127 | ||
05bdb996 | 128 | static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, |
44abff2c CH |
129 | void __user *argp) |
130 | { | |
131 | uint64_t start, len; | |
132 | uint64_t range[2]; | |
133 | int err; | |
134 | ||
05bdb996 | 135 | if (!(mode & BLK_OPEN_WRITE)) |
44abff2c CH |
136 | return -EBADF; |
137 | if (!bdev_max_secure_erase_sectors(bdev)) | |
138 | return -EOPNOTSUPP; | |
139 | if (copy_from_user(range, argp, sizeof(range))) | |
140 | return -EFAULT; | |
141 | ||
142 | start = range[0]; | |
143 | len = range[1]; | |
144 | if ((start & 511) || (len & 511)) | |
145 | return -EINVAL; | |
146 | if (start + len > bdev_nr_bytes(bdev)) | |
147 | return -EINVAL; | |
148 | ||
149 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
150 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
151 | if (!err) | |
152 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
153 | GFP_KERNEL); | |
154 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
155 | return err; | |
156 | } | |
157 | ||
158 | ||
05bdb996 | 159 | static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 | 160 | unsigned long arg) |
66ba32dc | 161 | { |
d8e4bb81 | 162 | uint64_t range[2]; |
22dd6d35 | 163 | uint64_t start, end, len; |
35e4c6c1 | 164 | struct inode *inode = bdev->bd_inode; |
384d87ef | 165 | int err; |
d8e4bb81 | 166 | |
05bdb996 | 167 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
168 | return -EBADF; |
169 | ||
170 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
171 | return -EFAULT; | |
172 | ||
173 | start = range[0]; | |
174 | len = range[1]; | |
22dd6d35 | 175 | end = start + len - 1; |
d8e4bb81 | 176 | |
66ba32dc MP |
177 | if (start & 511) |
178 | return -EINVAL; | |
179 | if (len & 511) | |
180 | return -EINVAL; | |
946e9937 | 181 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
182 | return -EINVAL; |
183 | if (end < start) | |
66ba32dc MP |
184 | return -EINVAL; |
185 | ||
22dd6d35 | 186 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 187 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
188 | err = truncate_bdev_range(bdev, mode, start, end); |
189 | if (err) | |
35e4c6c1 SK |
190 | goto fail; |
191 | ||
192 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
193 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 194 | |
35e4c6c1 SK |
195 | fail: |
196 | filemap_invalidate_unlock(inode->i_mapping); | |
197 | return err; | |
66ba32dc MP |
198 | } |
199 | ||
9b81648c | 200 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 201 | { |
9b81648c | 202 | return put_user(val, argp); |
1da177e4 LT |
203 | } |
204 | ||
9b81648c | 205 | static int put_int(int __user *argp, int val) |
1da177e4 | 206 | { |
9b81648c | 207 | return put_user(val, argp); |
1da177e4 LT |
208 | } |
209 | ||
9b81648c | 210 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 211 | { |
9b81648c | 212 | return put_user(val, argp); |
ac481c20 MP |
213 | } |
214 | ||
9b81648c | 215 | static int put_long(long __user *argp, long val) |
1da177e4 | 216 | { |
9b81648c | 217 | return put_user(val, argp); |
1da177e4 LT |
218 | } |
219 | ||
9b81648c | 220 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 221 | { |
9b81648c | 222 | return put_user(val, argp); |
1da177e4 LT |
223 | } |
224 | ||
9b81648c | 225 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 226 | { |
9b81648c | 227 | return put_user(val, argp); |
1da177e4 LT |
228 | } |
229 | ||
bdc1ddad | 230 | #ifdef CONFIG_COMPAT |
c8210a57 | 231 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 232 | { |
9b81648c | 233 | return put_user(val, argp); |
bdc1ddad AB |
234 | } |
235 | ||
c8210a57 | 236 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 237 | { |
9b81648c | 238 | return put_user(val, argp); |
bdc1ddad AB |
239 | } |
240 | #endif | |
241 | ||
ee6a129d AB |
242 | #ifdef CONFIG_COMPAT |
243 | /* | |
244 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
245 | * drivers that implement only commands that are completely compatible | |
246 | * between 32-bit and 64-bit user space | |
247 | */ | |
05bdb996 | 248 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, |
ee6a129d AB |
249 | unsigned cmd, unsigned long arg) |
250 | { | |
251 | struct gendisk *disk = bdev->bd_disk; | |
252 | ||
253 | if (disk->fops->ioctl) | |
254 | return disk->fops->ioctl(bdev, mode, cmd, | |
255 | (unsigned long)compat_ptr(arg)); | |
256 | ||
257 | return -ENOIOCTLCMD; | |
258 | } | |
259 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
260 | #endif | |
261 | ||
9a72a024 | 262 | static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) |
12629621 JX |
263 | { |
264 | /* no sense to make reservations for partitions */ | |
265 | if (bdev_is_partition(bdev)) | |
266 | return false; | |
267 | ||
268 | if (capable(CAP_SYS_ADMIN)) | |
269 | return true; | |
9a72a024 JX |
270 | /* |
271 | * Only allow unprivileged reservations if the file descriptor is open | |
272 | * for writing. | |
273 | */ | |
274 | return mode & BLK_OPEN_WRITE; | |
12629621 JX |
275 | } |
276 | ||
9a72a024 | 277 | static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
278 | struct pr_registration __user *arg) |
279 | { | |
280 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
281 | struct pr_registration reg; | |
282 | ||
9a72a024 | 283 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
284 | return -EPERM; |
285 | if (!ops || !ops->pr_register) | |
286 | return -EOPNOTSUPP; | |
287 | if (copy_from_user(®, arg, sizeof(reg))) | |
288 | return -EFAULT; | |
289 | ||
290 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
291 | return -EOPNOTSUPP; | |
292 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
293 | } | |
294 | ||
9a72a024 | 295 | static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
296 | struct pr_reservation __user *arg) |
297 | { | |
298 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
299 | struct pr_reservation rsv; | |
300 | ||
9a72a024 | 301 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
302 | return -EPERM; |
303 | if (!ops || !ops->pr_reserve) | |
304 | return -EOPNOTSUPP; | |
305 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
306 | return -EFAULT; | |
307 | ||
308 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
309 | return -EOPNOTSUPP; | |
310 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
311 | } | |
312 | ||
9a72a024 | 313 | static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
314 | struct pr_reservation __user *arg) |
315 | { | |
316 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
317 | struct pr_reservation rsv; | |
318 | ||
9a72a024 | 319 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
320 | return -EPERM; |
321 | if (!ops || !ops->pr_release) | |
322 | return -EOPNOTSUPP; | |
323 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
324 | return -EFAULT; | |
325 | ||
326 | if (rsv.flags) | |
327 | return -EOPNOTSUPP; | |
328 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
329 | } | |
330 | ||
9a72a024 | 331 | static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
332 | struct pr_preempt __user *arg, bool abort) |
333 | { | |
334 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
335 | struct pr_preempt p; | |
336 | ||
9a72a024 | 337 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
338 | return -EPERM; |
339 | if (!ops || !ops->pr_preempt) | |
340 | return -EOPNOTSUPP; | |
341 | if (copy_from_user(&p, arg, sizeof(p))) | |
342 | return -EFAULT; | |
343 | ||
344 | if (p.flags) | |
345 | return -EOPNOTSUPP; | |
346 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
347 | } | |
348 | ||
9a72a024 | 349 | static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
350 | struct pr_clear __user *arg) |
351 | { | |
352 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
353 | struct pr_clear c; | |
354 | ||
9a72a024 | 355 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
356 | return -EPERM; |
357 | if (!ops || !ops->pr_clear) | |
358 | return -EOPNOTSUPP; | |
359 | if (copy_from_user(&c, arg, sizeof(c))) | |
360 | return -EFAULT; | |
361 | ||
362 | if (c.flags) | |
363 | return -EOPNOTSUPP; | |
364 | return ops->pr_clear(bdev, c.key); | |
365 | } | |
366 | ||
5e4ea834 CH |
367 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
368 | unsigned long arg) | |
bb93e3a5 | 369 | { |
d8e4bb81 CH |
370 | if (!capable(CAP_SYS_ADMIN)) |
371 | return -EACCES; | |
2142b88c CH |
372 | |
373 | mutex_lock(&bdev->bd_holder_lock); | |
374 | if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) | |
375 | bdev->bd_holder_ops->sync(bdev); | |
fd146410 JK |
376 | else { |
377 | mutex_unlock(&bdev->bd_holder_lock); | |
2142b88c | 378 | sync_blockdev(bdev); |
fd146410 | 379 | } |
2142b88c | 380 | |
d8e4bb81 CH |
381 | invalidate_bdev(bdev); |
382 | return 0; | |
383 | } | |
d30a2605 | 384 | |
5e4ea834 CH |
385 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
386 | unsigned long arg) | |
d8e4bb81 CH |
387 | { |
388 | int ret, n; | |
d30a2605 | 389 | |
bb749b31 ID |
390 | if (!capable(CAP_SYS_ADMIN)) |
391 | return -EACCES; | |
392 | ||
d8e4bb81 CH |
393 | if (get_user(n, (int __user *)arg)) |
394 | return -EFAULT; | |
e00adcad CH |
395 | if (bdev->bd_disk->fops->set_read_only) { |
396 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
397 | if (ret) | |
398 | return ret; | |
399 | } | |
83950d35 | 400 | bdev->bd_read_only = n; |
d8e4bb81 CH |
401 | return 0; |
402 | } | |
d30a2605 | 403 | |
d8e4bb81 CH |
404 | static int blkdev_getgeo(struct block_device *bdev, |
405 | struct hd_geometry __user *argp) | |
406 | { | |
407 | struct gendisk *disk = bdev->bd_disk; | |
408 | struct hd_geometry geo; | |
409 | int ret; | |
d30a2605 | 410 | |
d8e4bb81 CH |
411 | if (!argp) |
412 | return -EINVAL; | |
413 | if (!disk->fops->getgeo) | |
414 | return -ENOTTY; | |
415 | ||
416 | /* | |
417 | * We need to set the startsect first, the driver may | |
418 | * want to override it. | |
419 | */ | |
420 | memset(&geo, 0, sizeof(geo)); | |
421 | geo.start = get_start_sect(bdev); | |
422 | ret = disk->fops->getgeo(bdev, &geo); | |
423 | if (ret) | |
424 | return ret; | |
425 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
426 | return -EFAULT; | |
427 | return 0; | |
428 | } | |
66ba32dc | 429 | |
bdc1ddad AB |
430 | #ifdef CONFIG_COMPAT |
431 | struct compat_hd_geometry { | |
432 | unsigned char heads; | |
433 | unsigned char sectors; | |
434 | unsigned short cylinders; | |
435 | u32 start; | |
436 | }; | |
437 | ||
9b81648c AB |
438 | static int compat_hdio_getgeo(struct block_device *bdev, |
439 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 440 | { |
9b81648c | 441 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
442 | struct hd_geometry geo; |
443 | int ret; | |
444 | ||
445 | if (!ugeo) | |
446 | return -EINVAL; | |
447 | if (!disk->fops->getgeo) | |
448 | return -ENOTTY; | |
449 | ||
450 | memset(&geo, 0, sizeof(geo)); | |
451 | /* | |
452 | * We need to set the startsect first, the driver may | |
453 | * want to override it. | |
454 | */ | |
455 | geo.start = get_start_sect(bdev); | |
456 | ret = disk->fops->getgeo(bdev, &geo); | |
457 | if (ret) | |
458 | return ret; | |
459 | ||
460 | ret = copy_to_user(ugeo, &geo, 4); | |
461 | ret |= put_user(geo.start, &ugeo->start); | |
462 | if (ret) | |
463 | ret = -EFAULT; | |
464 | ||
465 | return ret; | |
466 | } | |
467 | #endif | |
468 | ||
d8e4bb81 | 469 | /* set the logical block size */ |
05bdb996 | 470 | static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 CH |
471 | int __user *argp) |
472 | { | |
473 | int ret, n; | |
acb083b5 | 474 | struct bdev_handle *handle; |
66ba32dc | 475 | |
d8e4bb81 CH |
476 | if (!capable(CAP_SYS_ADMIN)) |
477 | return -EACCES; | |
478 | if (!argp) | |
479 | return -EINVAL; | |
480 | if (get_user(n, argp)) | |
481 | return -EFAULT; | |
66ba32dc | 482 | |
05bdb996 | 483 | if (mode & BLK_OPEN_EXCL) |
47816282 | 484 | return set_blocksize(bdev, n); |
d30a2605 | 485 | |
acb083b5 JK |
486 | handle = bdev_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); |
487 | if (IS_ERR(handle)) | |
47816282 | 488 | return -EBUSY; |
d8e4bb81 | 489 | ret = set_blocksize(bdev, n); |
acb083b5 | 490 | bdev_release(handle); |
47816282 | 491 | |
d8e4bb81 CH |
492 | return ret; |
493 | } | |
a885c8c4 | 494 | |
d8e4bb81 | 495 | /* |
9b81648c AB |
496 | * Common commands that are handled the same way on native and compat |
497 | * user space. Note the separate arg/argp parameters that are needed | |
498 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 499 | */ |
05bdb996 | 500 | static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, |
0f77b29a YK |
501 | unsigned int cmd, unsigned long arg, |
502 | void __user *argp) | |
d8e4bb81 | 503 | { |
d8e4bb81 CH |
504 | unsigned int max_sectors; |
505 | ||
506 | switch (cmd) { | |
507 | case BLKFLSBUF: | |
5e4ea834 | 508 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 509 | case BLKROSET: |
5e4ea834 | 510 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 511 | case BLKDISCARD: |
44abff2c | 512 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 513 | case BLKSECDISCARD: |
44abff2c | 514 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
515 | case BLKZEROOUT: |
516 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
517 | case BLKGETDISKSEQ: |
518 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 519 | case BLKREPORTZONE: |
5e4ea834 | 520 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 521 | case BLKRESETZONE: |
e876df1f AJ |
522 | case BLKOPENZONE: |
523 | case BLKCLOSEZONE: | |
524 | case BLKFINISHZONE: | |
525 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 526 | case BLKGETZONESZ: |
9b81648c | 527 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 528 | case BLKGETNRZONES: |
b623e347 | 529 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 530 | case BLKROGET: |
9b81648c | 531 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 532 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 533 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 534 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 535 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 536 | case BLKIOMIN: |
9b81648c | 537 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 538 | case BLKIOOPT: |
9b81648c | 539 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 540 | case BLKALIGNOFF: |
9b81648c | 541 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 542 | case BLKDISCARDZEROES: |
9b81648c | 543 | return put_uint(argp, 0); |
45048d09 | 544 | case BLKSECTGET: |
63f26496 AM |
545 | max_sectors = min_t(unsigned int, USHRT_MAX, |
546 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 547 | return put_ushort(argp, max_sectors); |
ef00f59c | 548 | case BLKROTATIONAL: |
10f0d2a5 | 549 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
550 | case BLKRASET: |
551 | case BLKFRASET: | |
552 | if(!capable(CAP_SYS_ADMIN)) | |
553 | return -EACCES; | |
a11d7fc2 | 554 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 555 | return 0; |
45048d09 | 556 | case BLKRRPART: |
e16e506c CH |
557 | if (!capable(CAP_SYS_ADMIN)) |
558 | return -EACCES; | |
559 | if (bdev_is_partition(bdev)) | |
560 | return -EINVAL; | |
e5cfefa9 | 561 | return disk_scan_partitions(bdev->bd_disk, mode); |
45048d09 AV |
562 | case BLKTRACESTART: |
563 | case BLKTRACESTOP: | |
45048d09 | 564 | case BLKTRACETEARDOWN: |
d8e4bb81 | 565 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 | 566 | case IOC_PR_REGISTER: |
9a72a024 | 567 | return blkdev_pr_register(bdev, mode, argp); |
bbd3e064 | 568 | case IOC_PR_RESERVE: |
9a72a024 | 569 | return blkdev_pr_reserve(bdev, mode, argp); |
bbd3e064 | 570 | case IOC_PR_RELEASE: |
9a72a024 | 571 | return blkdev_pr_release(bdev, mode, argp); |
bbd3e064 | 572 | case IOC_PR_PREEMPT: |
9a72a024 | 573 | return blkdev_pr_preempt(bdev, mode, argp, false); |
bbd3e064 | 574 | case IOC_PR_PREEMPT_ABORT: |
9a72a024 | 575 | return blkdev_pr_preempt(bdev, mode, argp, true); |
bbd3e064 | 576 | case IOC_PR_CLEAR: |
9a72a024 | 577 | return blkdev_pr_clear(bdev, mode, argp); |
45048d09 | 578 | default: |
9b81648c | 579 | return -ENOIOCTLCMD; |
45048d09 | 580 | } |
1da177e4 | 581 | } |
9b81648c AB |
582 | |
583 | /* | |
584 | * Always keep this in sync with compat_blkdev_ioctl() | |
585 | * to handle all incompatible commands in both functions. | |
586 | * | |
587 | * New commands must be compatible and go into blkdev_common_ioctl | |
588 | */ | |
8a709512 | 589 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 590 | { |
8a709512 | 591 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 592 | void __user *argp = (void __user *)arg; |
05bdb996 | 593 | blk_mode_t mode = file_to_blk_mode(file); |
8a709512 CH |
594 | int ret; |
595 | ||
9b81648c AB |
596 | switch (cmd) { |
597 | /* These need separate implementations for the data structure */ | |
598 | case HDIO_GETGEO: | |
599 | return blkdev_getgeo(bdev, argp); | |
600 | case BLKPG: | |
601 | return blkpg_ioctl(bdev, argp); | |
602 | ||
603 | /* Compat mode returns 32-bit data instead of 'long' */ | |
604 | case BLKRAGET: | |
605 | case BLKFRAGET: | |
606 | if (!argp) | |
607 | return -EINVAL; | |
a11d7fc2 CH |
608 | return put_long(argp, |
609 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 610 | case BLKGETSIZE: |
946e9937 | 611 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 612 | return -EFBIG; |
946e9937 | 613 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
614 | |
615 | /* The data is compatible, but the command number is different */ | |
616 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
617 | return put_int(argp, block_size(bdev)); | |
618 | case BLKBSZSET: | |
619 | return blkdev_bszset(bdev, mode, argp); | |
620 | case BLKGETSIZE64: | |
946e9937 | 621 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
622 | |
623 | /* Incompatible alignment on i386 */ | |
624 | case BLKTRACESETUP: | |
625 | return blk_trace_ioctl(bdev, cmd, argp); | |
626 | default: | |
627 | break; | |
628 | } | |
629 | ||
0f77b29a | 630 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
631 | if (ret != -ENOIOCTLCMD) |
632 | return ret; | |
9b81648c | 633 | |
a7cb3d2f CH |
634 | if (!bdev->bd_disk->fops->ioctl) |
635 | return -ENOTTY; | |
636 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 637 | } |
bdc1ddad AB |
638 | |
639 | #ifdef CONFIG_COMPAT | |
9b81648c | 640 | |
bdc1ddad AB |
641 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
642 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
643 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
644 | ||
645 | /* Most of the generic ioctls are handled in the normal fallback path. | |
646 | This assumes the blkdev's low level compat_ioctl always returns | |
647 | ENOIOCTLCMD for unknown ioctls. */ | |
648 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
649 | { | |
9b81648c AB |
650 | int ret; |
651 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 652 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad | 653 | struct gendisk *disk = bdev->bd_disk; |
05bdb996 | 654 | blk_mode_t mode = file_to_blk_mode(file); |
bdc1ddad AB |
655 | |
656 | switch (cmd) { | |
9b81648c | 657 | /* These need separate implementations for the data structure */ |
bdc1ddad | 658 | case HDIO_GETGEO: |
9b81648c | 659 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 660 | case BLKPG: |
9b81648c AB |
661 | return compat_blkpg_ioctl(bdev, argp); |
662 | ||
663 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
664 | case BLKRAGET: |
665 | case BLKFRAGET: | |
9b81648c | 666 | if (!argp) |
bdc1ddad | 667 | return -EINVAL; |
9b81648c | 668 | return compat_put_long(argp, |
a11d7fc2 | 669 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 670 | case BLKGETSIZE: |
ccf16413 | 671 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 672 | return -EFBIG; |
946e9937 | 673 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 674 | |
9b81648c AB |
675 | /* The data is compatible, but the command number is different */ |
676 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
677 | return put_int(argp, bdev_logical_block_size(bdev)); | |
678 | case BLKBSZSET_32: | |
679 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 680 | case BLKGETSIZE64_32: |
946e9937 | 681 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 682 | |
9b81648c | 683 | /* Incompatible alignment on i386 */ |
bdc1ddad | 684 | case BLKTRACESETUP32: |
9b81648c | 685 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 686 | default: |
9b81648c | 687 | break; |
bdc1ddad | 688 | } |
9b81648c | 689 | |
0f77b29a | 690 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
691 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
692 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
693 | ||
694 | return ret; | |
bdc1ddad AB |
695 | } |
696 | #endif |