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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 LT |
20 | struct blkpg_partition p; |
21 | long long 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 | |
fa9156ae CH |
36 | start = p.start >> SECTOR_SHIFT; |
37 | length = p.length >> SECTOR_SHIFT; | |
e71bf0d0 | 38 | |
fa9156ae CH |
39 | switch (op) { |
40 | case BLKPG_ADD_PARTITION: | |
41 | /* check if partition is aligned to blocksize */ | |
42 | if (p.start & (bdev_logical_block_size(bdev) - 1)) | |
1da177e4 | 43 | return -EINVAL; |
7f6be376 | 44 | return bdev_add_partition(disk, p.pno, start, length); |
fa9156ae | 45 | case BLKPG_RESIZE_PARTITION: |
3d2e7989 | 46 | return bdev_resize_partition(disk, p.pno, start, length); |
fa9156ae CH |
47 | default: |
48 | return -EINVAL; | |
1da177e4 LT |
49 | } |
50 | } | |
51 | ||
5fb889f5 AB |
52 | static int blkpg_ioctl(struct block_device *bdev, |
53 | struct blkpg_ioctl_arg __user *arg) | |
54 | { | |
55 | struct blkpg_partition __user *udata; | |
56 | int op; | |
57 | ||
58 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
59 | return -EFAULT; | |
60 | ||
61 | return blkpg_do_ioctl(bdev, udata, op); | |
62 | } | |
63 | ||
64 | #ifdef CONFIG_COMPAT | |
65 | struct compat_blkpg_ioctl_arg { | |
66 | compat_int_t op; | |
67 | compat_int_t flags; | |
68 | compat_int_t datalen; | |
69 | compat_caddr_t data; | |
70 | }; | |
71 | ||
72 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
73 | struct compat_blkpg_ioctl_arg __user *arg) | |
74 | { | |
75 | compat_caddr_t udata; | |
76 | int op; | |
77 | ||
78 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
79 | return -EFAULT; | |
80 | ||
81 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
82 | } | |
83 | #endif | |
84 | ||
d8e4bb81 | 85 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
44abff2c | 86 | unsigned long arg) |
d30a2605 | 87 | { |
d8e4bb81 CH |
88 | uint64_t range[2]; |
89 | uint64_t start, len; | |
7607c44c | 90 | struct inode *inode = bdev->bd_inode; |
384d87ef | 91 | int err; |
d8e4bb81 CH |
92 | |
93 | if (!(mode & FMODE_WRITE)) | |
94 | return -EBADF; | |
95 | ||
70200574 | 96 | if (!bdev_max_discard_sectors(bdev)) |
351499a1 DM |
97 | return -EOPNOTSUPP; |
98 | ||
d8e4bb81 CH |
99 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
100 | return -EFAULT; | |
101 | ||
102 | start = range[0]; | |
103 | len = range[1]; | |
8d57a98c | 104 | |
d30a2605 DW |
105 | if (start & 511) |
106 | return -EINVAL; | |
107 | if (len & 511) | |
108 | return -EINVAL; | |
d30a2605 | 109 | |
946e9937 | 110 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 111 | return -EINVAL; |
384d87ef | 112 | |
7607c44c | 113 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
114 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
115 | if (err) | |
7607c44c | 116 | goto fail; |
44abff2c | 117 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); |
7607c44c SK |
118 | fail: |
119 | filemap_invalidate_unlock(inode->i_mapping); | |
120 | return err; | |
d30a2605 DW |
121 | } |
122 | ||
44abff2c CH |
123 | static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode, |
124 | void __user *argp) | |
125 | { | |
126 | uint64_t start, len; | |
127 | uint64_t range[2]; | |
128 | int err; | |
129 | ||
130 | if (!(mode & FMODE_WRITE)) | |
131 | return -EBADF; | |
132 | if (!bdev_max_secure_erase_sectors(bdev)) | |
133 | return -EOPNOTSUPP; | |
134 | if (copy_from_user(range, argp, sizeof(range))) | |
135 | return -EFAULT; | |
136 | ||
137 | start = range[0]; | |
138 | len = range[1]; | |
139 | if ((start & 511) || (len & 511)) | |
140 | return -EINVAL; | |
141 | if (start + len > bdev_nr_bytes(bdev)) | |
142 | return -EINVAL; | |
143 | ||
144 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); | |
145 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
146 | if (!err) | |
147 | err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, | |
148 | GFP_KERNEL); | |
149 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
150 | return err; | |
151 | } | |
152 | ||
153 | ||
d8e4bb81 CH |
154 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
155 | unsigned long arg) | |
66ba32dc | 156 | { |
d8e4bb81 | 157 | uint64_t range[2]; |
22dd6d35 | 158 | uint64_t start, end, len; |
35e4c6c1 | 159 | struct inode *inode = bdev->bd_inode; |
384d87ef | 160 | int err; |
d8e4bb81 CH |
161 | |
162 | if (!(mode & FMODE_WRITE)) | |
163 | return -EBADF; | |
164 | ||
165 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
166 | return -EFAULT; | |
167 | ||
168 | start = range[0]; | |
169 | len = range[1]; | |
22dd6d35 | 170 | end = start + len - 1; |
d8e4bb81 | 171 | |
66ba32dc MP |
172 | if (start & 511) |
173 | return -EINVAL; | |
174 | if (len & 511) | |
175 | return -EINVAL; | |
946e9937 | 176 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
177 | return -EINVAL; |
178 | if (end < start) | |
66ba32dc MP |
179 | return -EINVAL; |
180 | ||
22dd6d35 | 181 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 182 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
183 | err = truncate_bdev_range(bdev, mode, start, end); |
184 | if (err) | |
35e4c6c1 SK |
185 | goto fail; |
186 | ||
187 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
188 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 189 | |
35e4c6c1 SK |
190 | fail: |
191 | filemap_invalidate_unlock(inode->i_mapping); | |
192 | return err; | |
66ba32dc MP |
193 | } |
194 | ||
9b81648c | 195 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 196 | { |
9b81648c | 197 | return put_user(val, argp); |
1da177e4 LT |
198 | } |
199 | ||
9b81648c | 200 | static int put_int(int __user *argp, int val) |
1da177e4 | 201 | { |
9b81648c | 202 | return put_user(val, argp); |
1da177e4 LT |
203 | } |
204 | ||
9b81648c | 205 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 206 | { |
9b81648c | 207 | return put_user(val, argp); |
ac481c20 MP |
208 | } |
209 | ||
9b81648c | 210 | static int put_long(long __user *argp, long val) |
1da177e4 | 211 | { |
9b81648c | 212 | return put_user(val, argp); |
1da177e4 LT |
213 | } |
214 | ||
9b81648c | 215 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 216 | { |
9b81648c | 217 | return put_user(val, argp); |
1da177e4 LT |
218 | } |
219 | ||
9b81648c | 220 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 221 | { |
9b81648c | 222 | return put_user(val, argp); |
1da177e4 LT |
223 | } |
224 | ||
bdc1ddad | 225 | #ifdef CONFIG_COMPAT |
c8210a57 | 226 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 227 | { |
9b81648c | 228 | return put_user(val, argp); |
bdc1ddad AB |
229 | } |
230 | ||
c8210a57 | 231 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 232 | { |
9b81648c | 233 | return put_user(val, argp); |
bdc1ddad AB |
234 | } |
235 | #endif | |
236 | ||
ee6a129d AB |
237 | #ifdef CONFIG_COMPAT |
238 | /* | |
239 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
240 | * drivers that implement only commands that are completely compatible | |
241 | * between 32-bit and 64-bit user space | |
242 | */ | |
243 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode, | |
244 | unsigned cmd, unsigned long arg) | |
245 | { | |
246 | struct gendisk *disk = bdev->bd_disk; | |
247 | ||
248 | if (disk->fops->ioctl) | |
249 | return disk->fops->ioctl(bdev, mode, cmd, | |
250 | (unsigned long)compat_ptr(arg)); | |
251 | ||
252 | return -ENOIOCTLCMD; | |
253 | } | |
254 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
255 | #endif | |
256 | ||
bbd3e064 CH |
257 | static int blkdev_pr_register(struct block_device *bdev, |
258 | struct pr_registration __user *arg) | |
259 | { | |
260 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
261 | struct pr_registration reg; | |
262 | ||
263 | if (!capable(CAP_SYS_ADMIN)) | |
264 | return -EPERM; | |
265 | if (!ops || !ops->pr_register) | |
266 | return -EOPNOTSUPP; | |
267 | if (copy_from_user(®, arg, sizeof(reg))) | |
268 | return -EFAULT; | |
269 | ||
270 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
271 | return -EOPNOTSUPP; | |
272 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
273 | } | |
274 | ||
275 | static int blkdev_pr_reserve(struct block_device *bdev, | |
276 | struct pr_reservation __user *arg) | |
277 | { | |
278 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
279 | struct pr_reservation rsv; | |
280 | ||
281 | if (!capable(CAP_SYS_ADMIN)) | |
282 | return -EPERM; | |
283 | if (!ops || !ops->pr_reserve) | |
284 | return -EOPNOTSUPP; | |
285 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
286 | return -EFAULT; | |
287 | ||
288 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
289 | return -EOPNOTSUPP; | |
290 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
291 | } | |
292 | ||
293 | static int blkdev_pr_release(struct block_device *bdev, | |
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 | ||
299 | if (!capable(CAP_SYS_ADMIN)) | |
300 | return -EPERM; | |
301 | if (!ops || !ops->pr_release) | |
302 | return -EOPNOTSUPP; | |
303 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
304 | return -EFAULT; | |
305 | ||
306 | if (rsv.flags) | |
307 | return -EOPNOTSUPP; | |
308 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
309 | } | |
310 | ||
311 | static int blkdev_pr_preempt(struct block_device *bdev, | |
312 | struct pr_preempt __user *arg, bool abort) | |
313 | { | |
314 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
315 | struct pr_preempt p; | |
316 | ||
317 | if (!capable(CAP_SYS_ADMIN)) | |
318 | return -EPERM; | |
319 | if (!ops || !ops->pr_preempt) | |
320 | return -EOPNOTSUPP; | |
321 | if (copy_from_user(&p, arg, sizeof(p))) | |
322 | return -EFAULT; | |
323 | ||
324 | if (p.flags) | |
325 | return -EOPNOTSUPP; | |
326 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
327 | } | |
328 | ||
329 | static int blkdev_pr_clear(struct block_device *bdev, | |
330 | struct pr_clear __user *arg) | |
331 | { | |
332 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
333 | struct pr_clear c; | |
334 | ||
335 | if (!capable(CAP_SYS_ADMIN)) | |
336 | return -EPERM; | |
337 | if (!ops || !ops->pr_clear) | |
338 | return -EOPNOTSUPP; | |
339 | if (copy_from_user(&c, arg, sizeof(c))) | |
340 | return -EFAULT; | |
341 | ||
342 | if (c.flags) | |
343 | return -EOPNOTSUPP; | |
344 | return ops->pr_clear(bdev, c.key); | |
345 | } | |
346 | ||
5e4ea834 CH |
347 | static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd, |
348 | unsigned long arg) | |
bb93e3a5 | 349 | { |
d8e4bb81 CH |
350 | if (!capable(CAP_SYS_ADMIN)) |
351 | return -EACCES; | |
d8e4bb81 CH |
352 | fsync_bdev(bdev); |
353 | invalidate_bdev(bdev); | |
354 | return 0; | |
355 | } | |
d30a2605 | 356 | |
5e4ea834 CH |
357 | static int blkdev_roset(struct block_device *bdev, unsigned cmd, |
358 | unsigned long arg) | |
d8e4bb81 CH |
359 | { |
360 | int ret, n; | |
d30a2605 | 361 | |
bb749b31 ID |
362 | if (!capable(CAP_SYS_ADMIN)) |
363 | return -EACCES; | |
364 | ||
d8e4bb81 CH |
365 | if (get_user(n, (int __user *)arg)) |
366 | return -EFAULT; | |
e00adcad CH |
367 | if (bdev->bd_disk->fops->set_read_only) { |
368 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
369 | if (ret) | |
370 | return ret; | |
371 | } | |
83950d35 | 372 | bdev->bd_read_only = n; |
d8e4bb81 CH |
373 | return 0; |
374 | } | |
d30a2605 | 375 | |
d8e4bb81 CH |
376 | static int blkdev_getgeo(struct block_device *bdev, |
377 | struct hd_geometry __user *argp) | |
378 | { | |
379 | struct gendisk *disk = bdev->bd_disk; | |
380 | struct hd_geometry geo; | |
381 | int ret; | |
d30a2605 | 382 | |
d8e4bb81 CH |
383 | if (!argp) |
384 | return -EINVAL; | |
385 | if (!disk->fops->getgeo) | |
386 | return -ENOTTY; | |
387 | ||
388 | /* | |
389 | * We need to set the startsect first, the driver may | |
390 | * want to override it. | |
391 | */ | |
392 | memset(&geo, 0, sizeof(geo)); | |
393 | geo.start = get_start_sect(bdev); | |
394 | ret = disk->fops->getgeo(bdev, &geo); | |
395 | if (ret) | |
396 | return ret; | |
397 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
398 | return -EFAULT; | |
399 | return 0; | |
400 | } | |
66ba32dc | 401 | |
bdc1ddad AB |
402 | #ifdef CONFIG_COMPAT |
403 | struct compat_hd_geometry { | |
404 | unsigned char heads; | |
405 | unsigned char sectors; | |
406 | unsigned short cylinders; | |
407 | u32 start; | |
408 | }; | |
409 | ||
9b81648c AB |
410 | static int compat_hdio_getgeo(struct block_device *bdev, |
411 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 412 | { |
9b81648c | 413 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
414 | struct hd_geometry geo; |
415 | int ret; | |
416 | ||
417 | if (!ugeo) | |
418 | return -EINVAL; | |
419 | if (!disk->fops->getgeo) | |
420 | return -ENOTTY; | |
421 | ||
422 | memset(&geo, 0, sizeof(geo)); | |
423 | /* | |
424 | * We need to set the startsect first, the driver may | |
425 | * want to override it. | |
426 | */ | |
427 | geo.start = get_start_sect(bdev); | |
428 | ret = disk->fops->getgeo(bdev, &geo); | |
429 | if (ret) | |
430 | return ret; | |
431 | ||
432 | ret = copy_to_user(ugeo, &geo, 4); | |
433 | ret |= put_user(geo.start, &ugeo->start); | |
434 | if (ret) | |
435 | ret = -EFAULT; | |
436 | ||
437 | return ret; | |
438 | } | |
439 | #endif | |
440 | ||
d8e4bb81 CH |
441 | /* set the logical block size */ |
442 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
443 | int __user *argp) | |
444 | { | |
445 | int ret, n; | |
66ba32dc | 446 | |
d8e4bb81 CH |
447 | if (!capable(CAP_SYS_ADMIN)) |
448 | return -EACCES; | |
449 | if (!argp) | |
450 | return -EINVAL; | |
451 | if (get_user(n, argp)) | |
452 | return -EFAULT; | |
66ba32dc | 453 | |
47816282 CH |
454 | if (mode & FMODE_EXCL) |
455 | return set_blocksize(bdev, n); | |
d30a2605 | 456 | |
2736e8ee | 457 | if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode, &bdev, NULL))) |
47816282 | 458 | return -EBUSY; |
d8e4bb81 | 459 | ret = set_blocksize(bdev, n); |
2736e8ee | 460 | blkdev_put(bdev, &bdev); |
47816282 | 461 | |
d8e4bb81 CH |
462 | return ret; |
463 | } | |
a885c8c4 | 464 | |
d8e4bb81 | 465 | /* |
9b81648c AB |
466 | * Common commands that are handled the same way on native and compat |
467 | * user space. Note the separate arg/argp parameters that are needed | |
468 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 469 | */ |
0f77b29a YK |
470 | static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, |
471 | unsigned int cmd, unsigned long arg, | |
472 | void __user *argp) | |
d8e4bb81 | 473 | { |
d8e4bb81 CH |
474 | unsigned int max_sectors; |
475 | ||
476 | switch (cmd) { | |
477 | case BLKFLSBUF: | |
5e4ea834 | 478 | return blkdev_flushbuf(bdev, cmd, arg); |
d8e4bb81 | 479 | case BLKROSET: |
5e4ea834 | 480 | return blkdev_roset(bdev, cmd, arg); |
d8e4bb81 | 481 | case BLKDISCARD: |
44abff2c | 482 | return blk_ioctl_discard(bdev, mode, arg); |
d8e4bb81 | 483 | case BLKSECDISCARD: |
44abff2c | 484 | return blk_ioctl_secure_erase(bdev, mode, argp); |
d8e4bb81 CH |
485 | case BLKZEROOUT: |
486 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
487 | case BLKGETDISKSEQ: |
488 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 | 489 | case BLKREPORTZONE: |
5e4ea834 | 490 | return blkdev_report_zones_ioctl(bdev, cmd, arg); |
3ed05a98 | 491 | case BLKRESETZONE: |
e876df1f AJ |
492 | case BLKOPENZONE: |
493 | case BLKCLOSEZONE: | |
494 | case BLKFINISHZONE: | |
495 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 496 | case BLKGETZONESZ: |
9b81648c | 497 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 498 | case BLKGETNRZONES: |
b623e347 | 499 | return put_uint(argp, bdev_nr_zones(bdev)); |
45048d09 | 500 | case BLKROGET: |
9b81648c | 501 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 502 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 503 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 504 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 505 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 506 | case BLKIOMIN: |
9b81648c | 507 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 508 | case BLKIOOPT: |
9b81648c | 509 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 510 | case BLKALIGNOFF: |
9b81648c | 511 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 512 | case BLKDISCARDZEROES: |
9b81648c | 513 | return put_uint(argp, 0); |
45048d09 | 514 | case BLKSECTGET: |
63f26496 AM |
515 | max_sectors = min_t(unsigned int, USHRT_MAX, |
516 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 517 | return put_ushort(argp, max_sectors); |
ef00f59c | 518 | case BLKROTATIONAL: |
10f0d2a5 | 519 | return put_ushort(argp, !bdev_nonrot(bdev)); |
45048d09 AV |
520 | case BLKRASET: |
521 | case BLKFRASET: | |
522 | if(!capable(CAP_SYS_ADMIN)) | |
523 | return -EACCES; | |
a11d7fc2 | 524 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 525 | return 0; |
45048d09 | 526 | case BLKRRPART: |
e16e506c CH |
527 | if (!capable(CAP_SYS_ADMIN)) |
528 | return -EACCES; | |
529 | if (bdev_is_partition(bdev)) | |
530 | return -EINVAL; | |
e5cfefa9 | 531 | return disk_scan_partitions(bdev->bd_disk, mode); |
45048d09 AV |
532 | case BLKTRACESTART: |
533 | case BLKTRACESTOP: | |
45048d09 | 534 | case BLKTRACETEARDOWN: |
d8e4bb81 | 535 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
536 | case IOC_PR_REGISTER: |
537 | return blkdev_pr_register(bdev, argp); | |
538 | case IOC_PR_RESERVE: | |
539 | return blkdev_pr_reserve(bdev, argp); | |
540 | case IOC_PR_RELEASE: | |
541 | return blkdev_pr_release(bdev, argp); | |
542 | case IOC_PR_PREEMPT: | |
543 | return blkdev_pr_preempt(bdev, argp, false); | |
544 | case IOC_PR_PREEMPT_ABORT: | |
545 | return blkdev_pr_preempt(bdev, argp, true); | |
546 | case IOC_PR_CLEAR: | |
547 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 548 | default: |
9b81648c | 549 | return -ENOIOCTLCMD; |
45048d09 | 550 | } |
1da177e4 | 551 | } |
9b81648c AB |
552 | |
553 | /* | |
554 | * Always keep this in sync with compat_blkdev_ioctl() | |
555 | * to handle all incompatible commands in both functions. | |
556 | * | |
557 | * New commands must be compatible and go into blkdev_common_ioctl | |
558 | */ | |
8a709512 | 559 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 560 | { |
8a709512 | 561 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 562 | void __user *argp = (void __user *)arg; |
8a709512 | 563 | fmode_t mode = file->f_mode; |
8a709512 CH |
564 | int ret; |
565 | ||
566 | /* | |
567 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
568 | * to updated it before every ioctl. | |
569 | */ | |
570 | if (file->f_flags & O_NDELAY) | |
571 | mode |= FMODE_NDELAY; | |
572 | else | |
573 | mode &= ~FMODE_NDELAY; | |
9b81648c AB |
574 | |
575 | switch (cmd) { | |
576 | /* These need separate implementations for the data structure */ | |
577 | case HDIO_GETGEO: | |
578 | return blkdev_getgeo(bdev, argp); | |
579 | case BLKPG: | |
580 | return blkpg_ioctl(bdev, argp); | |
581 | ||
582 | /* Compat mode returns 32-bit data instead of 'long' */ | |
583 | case BLKRAGET: | |
584 | case BLKFRAGET: | |
585 | if (!argp) | |
586 | return -EINVAL; | |
a11d7fc2 CH |
587 | return put_long(argp, |
588 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 589 | case BLKGETSIZE: |
946e9937 | 590 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 591 | return -EFBIG; |
946e9937 | 592 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
593 | |
594 | /* The data is compatible, but the command number is different */ | |
595 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
596 | return put_int(argp, block_size(bdev)); | |
597 | case BLKBSZSET: | |
598 | return blkdev_bszset(bdev, mode, argp); | |
599 | case BLKGETSIZE64: | |
946e9937 | 600 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
601 | |
602 | /* Incompatible alignment on i386 */ | |
603 | case BLKTRACESETUP: | |
604 | return blk_trace_ioctl(bdev, cmd, argp); | |
605 | default: | |
606 | break; | |
607 | } | |
608 | ||
0f77b29a | 609 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
a7cb3d2f CH |
610 | if (ret != -ENOIOCTLCMD) |
611 | return ret; | |
9b81648c | 612 | |
a7cb3d2f CH |
613 | if (!bdev->bd_disk->fops->ioctl) |
614 | return -ENOTTY; | |
615 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 616 | } |
bdc1ddad AB |
617 | |
618 | #ifdef CONFIG_COMPAT | |
9b81648c | 619 | |
bdc1ddad AB |
620 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
621 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
622 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
623 | ||
624 | /* Most of the generic ioctls are handled in the normal fallback path. | |
625 | This assumes the blkdev's low level compat_ioctl always returns | |
626 | ENOIOCTLCMD for unknown ioctls. */ | |
627 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
628 | { | |
9b81648c AB |
629 | int ret; |
630 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 631 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad AB |
632 | struct gendisk *disk = bdev->bd_disk; |
633 | fmode_t mode = file->f_mode; | |
bdc1ddad AB |
634 | |
635 | /* | |
636 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
637 | * to updated it before every ioctl. | |
638 | */ | |
639 | if (file->f_flags & O_NDELAY) | |
640 | mode |= FMODE_NDELAY; | |
641 | else | |
642 | mode &= ~FMODE_NDELAY; | |
643 | ||
644 | switch (cmd) { | |
9b81648c | 645 | /* These need separate implementations for the data structure */ |
bdc1ddad | 646 | case HDIO_GETGEO: |
9b81648c | 647 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 648 | case BLKPG: |
9b81648c AB |
649 | return compat_blkpg_ioctl(bdev, argp); |
650 | ||
651 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
652 | case BLKRAGET: |
653 | case BLKFRAGET: | |
9b81648c | 654 | if (!argp) |
bdc1ddad | 655 | return -EINVAL; |
9b81648c | 656 | return compat_put_long(argp, |
a11d7fc2 | 657 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 658 | case BLKGETSIZE: |
ccf16413 | 659 | if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0) |
bdc1ddad | 660 | return -EFBIG; |
946e9937 | 661 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 662 | |
9b81648c AB |
663 | /* The data is compatible, but the command number is different */ |
664 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
665 | return put_int(argp, bdev_logical_block_size(bdev)); | |
666 | case BLKBSZSET_32: | |
667 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 668 | case BLKGETSIZE64_32: |
946e9937 | 669 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 670 | |
9b81648c | 671 | /* Incompatible alignment on i386 */ |
bdc1ddad | 672 | case BLKTRACESETUP32: |
9b81648c | 673 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 674 | default: |
9b81648c | 675 | break; |
bdc1ddad | 676 | } |
9b81648c | 677 | |
0f77b29a | 678 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); |
9b81648c AB |
679 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) |
680 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
681 | ||
682 | return ret; | |
bdc1ddad AB |
683 | } |
684 | #endif |