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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; |
d8e4bb81 CH |
99 | uint64_t range[2]; |
100 | uint64_t start, len; | |
7607c44c | 101 | struct inode *inode = bdev->bd_inode; |
384d87ef | 102 | int err; |
d8e4bb81 | 103 | |
05bdb996 | 104 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
105 | return -EBADF; |
106 | ||
70200574 | 107 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 | 108 | return -EOPNOTSUPP; |
30f1e724 CH |
109 | if (bdev_read_only(bdev)) |
110 | return -EPERM; | |
351499a1 | 111 | |
d8e4bb81 CH |
112 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
113 | return -EFAULT; | |
114 | ||
115 | start = range[0]; | |
116 | len = range[1]; | |
8d57a98c | 117 | |
30f1e724 | 118 | if (!len) |
d30a2605 | 119 | return -EINVAL; |
30f1e724 | 120 | if ((start | len) & bs_mask) |
d30a2605 | 121 | return -EINVAL; |
d30a2605 | 122 | |
946e9937 | 123 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 124 | return -EINVAL; |
384d87ef | 125 | |
7607c44c | 126 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
127 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
128 | if (err) | |
7607c44c | 129 | goto fail; |
44abff2c | 130 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); |
7607c44c SK |
131 | fail: |
132 | filemap_invalidate_unlock(inode->i_mapping); | |
133 | return err; | |
d30a2605 DW |
134 | } |
135 | ||
05bdb996 | 136 | static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode, |
44abff2c CH |
137 | void __user *argp) |
138 | { | |
139 | uint64_t start, len; | |
140 | uint64_t range[2]; | |
141 | int err; | |
142 | ||
05bdb996 | 143 | if (!(mode & BLK_OPEN_WRITE)) |
44abff2c CH |
144 | return -EBADF; |
145 | if (!bdev_max_secure_erase_sectors(bdev)) | |
146 | return -EOPNOTSUPP; | |
147 | if (copy_from_user(range, argp, sizeof(range))) | |
148 | return -EFAULT; | |
149 | ||
150 | start = range[0]; | |
151 | len = range[1]; | |
152 | if ((start & 511) || (len & 511)) | |
153 | return -EINVAL; | |
154 | if (start + len > bdev_nr_bytes(bdev)) | |
155 | return -EINVAL; | |
156 | ||
157 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
158 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
159 | if (!err) | |
160 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
161 | GFP_KERNEL); | |
162 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
163 | return err; | |
164 | } | |
165 | ||
166 | ||
05bdb996 | 167 | static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 | 168 | unsigned long arg) |
66ba32dc | 169 | { |
d8e4bb81 | 170 | uint64_t range[2]; |
22dd6d35 | 171 | uint64_t start, end, len; |
35e4c6c1 | 172 | struct inode *inode = bdev->bd_inode; |
384d87ef | 173 | int err; |
d8e4bb81 | 174 | |
05bdb996 | 175 | if (!(mode & BLK_OPEN_WRITE)) |
d8e4bb81 CH |
176 | return -EBADF; |
177 | ||
178 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
179 | return -EFAULT; | |
180 | ||
181 | start = range[0]; | |
182 | len = range[1]; | |
22dd6d35 | 183 | end = start + len - 1; |
d8e4bb81 | 184 | |
66ba32dc MP |
185 | if (start & 511) |
186 | return -EINVAL; | |
187 | if (len & 511) | |
188 | return -EINVAL; | |
946e9937 | 189 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
190 | return -EINVAL; |
191 | if (end < start) | |
66ba32dc MP |
192 | return -EINVAL; |
193 | ||
22dd6d35 | 194 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 195 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
196 | err = truncate_bdev_range(bdev, mode, start, end); |
197 | if (err) | |
35e4c6c1 SK |
198 | goto fail; |
199 | ||
200 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
201 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 202 | |
35e4c6c1 SK |
203 | fail: |
204 | filemap_invalidate_unlock(inode->i_mapping); | |
205 | return err; | |
66ba32dc MP |
206 | } |
207 | ||
9b81648c | 208 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 209 | { |
9b81648c | 210 | return put_user(val, argp); |
1da177e4 LT |
211 | } |
212 | ||
9b81648c | 213 | static int put_int(int __user *argp, int val) |
1da177e4 | 214 | { |
9b81648c | 215 | return put_user(val, argp); |
1da177e4 LT |
216 | } |
217 | ||
9b81648c | 218 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 219 | { |
9b81648c | 220 | return put_user(val, argp); |
ac481c20 MP |
221 | } |
222 | ||
9b81648c | 223 | static int put_long(long __user *argp, long val) |
1da177e4 | 224 | { |
9b81648c | 225 | return put_user(val, argp); |
1da177e4 LT |
226 | } |
227 | ||
9b81648c | 228 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 229 | { |
9b81648c | 230 | return put_user(val, argp); |
1da177e4 LT |
231 | } |
232 | ||
9b81648c | 233 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 234 | { |
9b81648c | 235 | return put_user(val, argp); |
1da177e4 LT |
236 | } |
237 | ||
bdc1ddad | 238 | #ifdef CONFIG_COMPAT |
c8210a57 | 239 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 240 | { |
9b81648c | 241 | return put_user(val, argp); |
bdc1ddad AB |
242 | } |
243 | ||
c8210a57 | 244 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 245 | { |
9b81648c | 246 | return put_user(val, argp); |
bdc1ddad AB |
247 | } |
248 | #endif | |
249 | ||
ee6a129d AB |
250 | #ifdef CONFIG_COMPAT |
251 | /* | |
252 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
253 | * drivers that implement only commands that are completely compatible | |
254 | * between 32-bit and 64-bit user space | |
255 | */ | |
05bdb996 | 256 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode, |
ee6a129d AB |
257 | unsigned cmd, unsigned long arg) |
258 | { | |
259 | struct gendisk *disk = bdev->bd_disk; | |
260 | ||
261 | if (disk->fops->ioctl) | |
262 | return disk->fops->ioctl(bdev, mode, cmd, | |
263 | (unsigned long)compat_ptr(arg)); | |
264 | ||
265 | return -ENOIOCTLCMD; | |
266 | } | |
267 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
268 | #endif | |
269 | ||
9a72a024 | 270 | static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode) |
12629621 JX |
271 | { |
272 | /* no sense to make reservations for partitions */ | |
273 | if (bdev_is_partition(bdev)) | |
274 | return false; | |
275 | ||
276 | if (capable(CAP_SYS_ADMIN)) | |
277 | return true; | |
9a72a024 JX |
278 | /* |
279 | * Only allow unprivileged reservations if the file descriptor is open | |
280 | * for writing. | |
281 | */ | |
282 | return mode & BLK_OPEN_WRITE; | |
12629621 JX |
283 | } |
284 | ||
9a72a024 | 285 | static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
286 | struct pr_registration __user *arg) |
287 | { | |
288 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
289 | struct pr_registration reg; | |
290 | ||
9a72a024 | 291 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
292 | return -EPERM; |
293 | if (!ops || !ops->pr_register) | |
294 | return -EOPNOTSUPP; | |
295 | if (copy_from_user(®, arg, sizeof(reg))) | |
296 | return -EFAULT; | |
297 | ||
298 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
299 | return -EOPNOTSUPP; | |
300 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
301 | } | |
302 | ||
9a72a024 | 303 | static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
304 | struct pr_reservation __user *arg) |
305 | { | |
306 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
307 | struct pr_reservation rsv; | |
308 | ||
9a72a024 | 309 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
310 | return -EPERM; |
311 | if (!ops || !ops->pr_reserve) | |
312 | return -EOPNOTSUPP; | |
313 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
314 | return -EFAULT; | |
315 | ||
316 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
317 | return -EOPNOTSUPP; | |
318 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
319 | } | |
320 | ||
9a72a024 | 321 | static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
322 | struct pr_reservation __user *arg) |
323 | { | |
324 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
325 | struct pr_reservation rsv; | |
326 | ||
9a72a024 | 327 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
328 | return -EPERM; |
329 | if (!ops || !ops->pr_release) | |
330 | return -EOPNOTSUPP; | |
331 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
332 | return -EFAULT; | |
333 | ||
334 | if (rsv.flags) | |
335 | return -EOPNOTSUPP; | |
336 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
337 | } | |
338 | ||
9a72a024 | 339 | static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
340 | struct pr_preempt __user *arg, bool abort) |
341 | { | |
342 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
343 | struct pr_preempt p; | |
344 | ||
9a72a024 | 345 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
346 | return -EPERM; |
347 | if (!ops || !ops->pr_preempt) | |
348 | return -EOPNOTSUPP; | |
349 | if (copy_from_user(&p, arg, sizeof(p))) | |
350 | return -EFAULT; | |
351 | ||
352 | if (p.flags) | |
353 | return -EOPNOTSUPP; | |
354 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
355 | } | |
356 | ||
9a72a024 | 357 | static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode, |
bbd3e064 CH |
358 | struct pr_clear __user *arg) |
359 | { | |
360 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
361 | struct pr_clear c; | |
362 | ||
9a72a024 | 363 | if (!blkdev_pr_allowed(bdev, mode)) |
bbd3e064 CH |
364 | return -EPERM; |
365 | if (!ops || !ops->pr_clear) | |
366 | return -EOPNOTSUPP; | |
367 | if (copy_from_user(&c, arg, sizeof(c))) | |
368 | return -EFAULT; | |
369 | ||
370 | if (c.flags) | |
371 | return -EOPNOTSUPP; | |
372 | return ops->pr_clear(bdev, c.key); | |
373 | } | |
374 | ||
5e4ea834 CH |
375 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
376 | unsigned long arg) | |
bb93e3a5 | 377 | { |
d8e4bb81 CH |
378 | if (!capable(CAP_SYS_ADMIN)) |
379 | return -EACCES; | |
2142b88c CH |
380 | |
381 | mutex_lock(&bdev->bd_holder_lock); | |
382 | if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync) | |
383 | bdev->bd_holder_ops->sync(bdev); | |
fd146410 JK |
384 | else { |
385 | mutex_unlock(&bdev->bd_holder_lock); | |
2142b88c | 386 | sync_blockdev(bdev); |
fd146410 | 387 | } |
2142b88c | 388 | |
d8e4bb81 CH |
389 | invalidate_bdev(bdev); |
390 | return 0; | |
391 | } | |
d30a2605 | 392 | |
5e4ea834 CH |
393 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
394 | unsigned long arg) | |
d8e4bb81 CH |
395 | { |
396 | int ret, n; | |
d30a2605 | 397 | |
bb749b31 ID |
398 | if (!capable(CAP_SYS_ADMIN)) |
399 | return -EACCES; | |
400 | ||
d8e4bb81 CH |
401 | if (get_user(n, (int __user *)arg)) |
402 | return -EFAULT; | |
e00adcad CH |
403 | if (bdev->bd_disk->fops->set_read_only) { |
404 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
405 | if (ret) | |
406 | return ret; | |
407 | } | |
83950d35 | 408 | bdev->bd_read_only = n; |
d8e4bb81 CH |
409 | return 0; |
410 | } | |
d30a2605 | 411 | |
d8e4bb81 CH |
412 | static int blkdev_getgeo(struct block_device *bdev, |
413 | struct hd_geometry __user *argp) | |
414 | { | |
415 | struct gendisk *disk = bdev->bd_disk; | |
416 | struct hd_geometry geo; | |
417 | int ret; | |
d30a2605 | 418 | |
d8e4bb81 CH |
419 | if (!argp) |
420 | return -EINVAL; | |
421 | if (!disk->fops->getgeo) | |
422 | return -ENOTTY; | |
423 | ||
424 | /* | |
425 | * We need to set the startsect first, the driver may | |
426 | * want to override it. | |
427 | */ | |
428 | memset(&geo, 0, sizeof(geo)); | |
429 | geo.start = get_start_sect(bdev); | |
430 | ret = disk->fops->getgeo(bdev, &geo); | |
431 | if (ret) | |
432 | return ret; | |
433 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
434 | return -EFAULT; | |
435 | return 0; | |
436 | } | |
66ba32dc | 437 | |
bdc1ddad AB |
438 | #ifdef CONFIG_COMPAT |
439 | struct compat_hd_geometry { | |
440 | unsigned char heads; | |
441 | unsigned char sectors; | |
442 | unsigned short cylinders; | |
443 | u32 start; | |
444 | }; | |
445 | ||
9b81648c AB |
446 | static int compat_hdio_getgeo(struct block_device *bdev, |
447 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 448 | { |
9b81648c | 449 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
450 | struct hd_geometry geo; |
451 | int ret; | |
452 | ||
453 | if (!ugeo) | |
454 | return -EINVAL; | |
455 | if (!disk->fops->getgeo) | |
456 | return -ENOTTY; | |
457 | ||
458 | memset(&geo, 0, sizeof(geo)); | |
459 | /* | |
460 | * We need to set the startsect first, the driver may | |
461 | * want to override it. | |
462 | */ | |
463 | geo.start = get_start_sect(bdev); | |
464 | ret = disk->fops->getgeo(bdev, &geo); | |
465 | if (ret) | |
466 | return ret; | |
467 | ||
468 | ret = copy_to_user(ugeo, &geo, 4); | |
469 | ret |= put_user(geo.start, &ugeo->start); | |
470 | if (ret) | |
471 | ret = -EFAULT; | |
472 | ||
473 | return ret; | |
474 | } | |
475 | #endif | |
476 | ||
d8e4bb81 | 477 | /* set the logical block size */ |
05bdb996 | 478 | static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode, |
d8e4bb81 CH |
479 | int __user *argp) |
480 | { | |
481 | int ret, n; | |
e5ca9d39 | 482 | struct file *file; |
66ba32dc | 483 | |
d8e4bb81 CH |
484 | if (!capable(CAP_SYS_ADMIN)) |
485 | return -EACCES; | |
486 | if (!argp) | |
487 | return -EINVAL; | |
488 | if (get_user(n, argp)) | |
489 | return -EFAULT; | |
66ba32dc | 490 | |
05bdb996 | 491 | if (mode & BLK_OPEN_EXCL) |
47816282 | 492 | return set_blocksize(bdev, n); |
d30a2605 | 493 | |
e5ca9d39 CB |
494 | file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL); |
495 | if (IS_ERR(file)) | |
47816282 | 496 | return -EBUSY; |
d8e4bb81 | 497 | ret = set_blocksize(bdev, n); |
e5ca9d39 | 498 | fput(file); |
d8e4bb81 CH |
499 | return ret; |
500 | } | |
a885c8c4 | 501 | |
d8e4bb81 | 502 | /* |
9b81648c AB |
503 | * Common commands that are handled the same way on native and compat |
504 | * user space. Note the separate arg/argp parameters that are needed | |
505 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 506 | */ |
05bdb996 | 507 | static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode, |
0f77b29a YK |
508 | unsigned int cmd, unsigned long arg, |
509 | void __user *argp) | |
d8e4bb81 | 510 | { |
d8e4bb81 CH |
511 | unsigned int max_sectors; |
512 | ||
513 | switch (cmd) { | |
514 | case BLKFLSBUF: | |
5e4ea834 | 515 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 516 | case BLKROSET: |
5e4ea834 | 517 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 518 | case BLKDISCARD: |
44abff2c | 519 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 520 | case BLKSECDISCARD: |
44abff2c | 521 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
522 | case BLKZEROOUT: |
523 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
524 | case BLKGETDISKSEQ: |
525 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 526 | case BLKREPORTZONE: |
5e4ea834 | 527 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 528 | case BLKRESETZONE: |
e876df1f AJ |
529 | case BLKOPENZONE: |
530 | case BLKCLOSEZONE: | |
531 | case BLKFINISHZONE: | |
532 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 533 | case BLKGETZONESZ: |
9b81648c | 534 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 535 | case BLKGETNRZONES: |
b623e347 | 536 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 537 | case BLKROGET: |
9b81648c | 538 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 539 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 540 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 541 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 542 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 543 | case BLKIOMIN: |
9b81648c | 544 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 545 | case BLKIOOPT: |
9b81648c | 546 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 547 | case BLKALIGNOFF: |
9b81648c | 548 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 549 | case BLKDISCARDZEROES: |
9b81648c | 550 | return put_uint(argp, 0); |
45048d09 | 551 | case BLKSECTGET: |
63f26496 AM |
552 | max_sectors = min_t(unsigned int, USHRT_MAX, |
553 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 554 | return put_ushort(argp, max_sectors); |
ef00f59c | 555 | case BLKROTATIONAL: |
10f0d2a5 | 556 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
557 | case BLKRASET: |
558 | case BLKFRASET: | |
559 | if(!capable(CAP_SYS_ADMIN)) | |
560 | return -EACCES; | |
a11d7fc2 | 561 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 562 | return 0; |
45048d09 | 563 | case BLKRRPART: |
e16e506c CH |
564 | if (!capable(CAP_SYS_ADMIN)) |
565 | return -EACCES; | |
566 | if (bdev_is_partition(bdev)) | |
567 | return -EINVAL; | |
e5cfefa9 | 568 | return disk_scan_partitions(bdev->bd_disk, mode); |
45048d09 AV |
569 | case BLKTRACESTART: |
570 | case BLKTRACESTOP: | |
45048d09 | 571 | case BLKTRACETEARDOWN: |
d8e4bb81 | 572 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 | 573 | case IOC_PR_REGISTER: |
9a72a024 | 574 | return blkdev_pr_register(bdev, mode, argp); |
bbd3e064 | 575 | case IOC_PR_RESERVE: |
9a72a024 | 576 | return blkdev_pr_reserve(bdev, mode, argp); |
bbd3e064 | 577 | case IOC_PR_RELEASE: |
9a72a024 | 578 | return blkdev_pr_release(bdev, mode, argp); |
bbd3e064 | 579 | case IOC_PR_PREEMPT: |
9a72a024 | 580 | return blkdev_pr_preempt(bdev, mode, argp, false); |
bbd3e064 | 581 | case IOC_PR_PREEMPT_ABORT: |
9a72a024 | 582 | return blkdev_pr_preempt(bdev, mode, argp, true); |
bbd3e064 | 583 | case IOC_PR_CLEAR: |
9a72a024 | 584 | return blkdev_pr_clear(bdev, mode, argp); |
45048d09 | 585 | default: |
9b81648c | 586 | return -ENOIOCTLCMD; |
45048d09 | 587 | } |
1da177e4 | 588 | } |
9b81648c AB |
589 | |
590 | /* | |
591 | * Always keep this in sync with compat_blkdev_ioctl() | |
592 | * to handle all incompatible commands in both functions. | |
593 | * | |
594 | * New commands must be compatible and go into blkdev_common_ioctl | |
595 | */ | |
8a709512 | 596 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 597 | { |
8a709512 | 598 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 599 | void __user *argp = (void __user *)arg; |
05bdb996 | 600 | blk_mode_t mode = file_to_blk_mode(file); |
8a709512 CH |
601 | int ret; |
602 | ||
9b81648c AB |
603 | switch (cmd) { |
604 | /* These need separate implementations for the data structure */ | |
605 | case HDIO_GETGEO: | |
606 | return blkdev_getgeo(bdev, argp); | |
607 | case BLKPG: | |
608 | return blkpg_ioctl(bdev, argp); | |
609 | ||
610 | /* Compat mode returns 32-bit data instead of 'long' */ | |
611 | case BLKRAGET: | |
612 | case BLKFRAGET: | |
613 | if (!argp) | |
614 | return -EINVAL; | |
a11d7fc2 CH |
615 | return put_long(argp, |
616 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 617 | case BLKGETSIZE: |
946e9937 | 618 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 619 | return -EFBIG; |
946e9937 | 620 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
621 | |
622 | /* The data is compatible, but the command number is different */ | |
623 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
624 | return put_int(argp, block_size(bdev)); | |
625 | case BLKBSZSET: | |
626 | return blkdev_bszset(bdev, mode, argp); | |
627 | case BLKGETSIZE64: | |
946e9937 | 628 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
629 | |
630 | /* Incompatible alignment on i386 */ | |
631 | case BLKTRACESETUP: | |
632 | return blk_trace_ioctl(bdev, cmd, argp); | |
633 | default: | |
634 | break; | |
635 | } | |
636 | ||
0f77b29a | 637 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
638 | if (ret != -ENOIOCTLCMD) |
639 | return ret; | |
9b81648c | 640 | |
a7cb3d2f CH |
641 | if (!bdev->bd_disk->fops->ioctl) |
642 | return -ENOTTY; | |
643 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 644 | } |
bdc1ddad AB |
645 | |
646 | #ifdef CONFIG_COMPAT | |
9b81648c | 647 | |
bdc1ddad AB |
648 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
649 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
650 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
651 | ||
652 | /* Most of the generic ioctls are handled in the normal fallback path. | |
653 | This assumes the blkdev's low level compat_ioctl always returns | |
654 | ENOIOCTLCMD for unknown ioctls. */ | |
655 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
656 | { | |
9b81648c AB |
657 | int ret; |
658 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 659 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad | 660 | struct gendisk *disk = bdev->bd_disk; |
05bdb996 | 661 | blk_mode_t mode = file_to_blk_mode(file); |
bdc1ddad AB |
662 | |
663 | switch (cmd) { | |
9b81648c | 664 | /* These need separate implementations for the data structure */ |
bdc1ddad | 665 | case HDIO_GETGEO: |
9b81648c | 666 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 667 | case BLKPG: |
9b81648c AB |
668 | return compat_blkpg_ioctl(bdev, argp); |
669 | ||
670 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
671 | case BLKRAGET: |
672 | case BLKFRAGET: | |
9b81648c | 673 | if (!argp) |
bdc1ddad | 674 | return -EINVAL; |
9b81648c | 675 | return compat_put_long(argp, |
a11d7fc2 | 676 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 677 | case BLKGETSIZE: |
ccf16413 | 678 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 679 | return -EFBIG; |
946e9937 | 680 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 681 | |
9b81648c AB |
682 | /* The data is compatible, but the command number is different */ |
683 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
684 | return put_int(argp, bdev_logical_block_size(bdev)); | |
685 | case BLKBSZSET_32: | |
686 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 687 | case BLKGETSIZE64_32: |
946e9937 | 688 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 689 | |
9b81648c | 690 | /* Incompatible alignment on i386 */ |
bdc1ddad | 691 | case BLKTRACESETUP32: |
9b81648c | 692 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 693 | default: |
9b81648c | 694 | break; |
bdc1ddad | 695 | } |
9b81648c | 696 | |
0f77b29a | 697 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
698 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
699 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
700 | ||
701 | return ret; | |
bdc1ddad AB |
702 | } |
703 | #endif |