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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 | { |
1da177e4 LT |
19 | struct blkpg_partition p; |
20 | long long start, length; | |
1da177e4 LT |
21 | |
22 | if (!capable(CAP_SYS_ADMIN)) | |
23 | return -EACCES; | |
5fb889f5 | 24 | if (copy_from_user(&p, upart, sizeof(struct blkpg_partition))) |
1da177e4 | 25 | return -EFAULT; |
1da177e4 LT |
26 | if (bdev != bdev->bd_contains) |
27 | return -EINVAL; | |
88e34126 | 28 | |
fa9156ae CH |
29 | if (p.pno <= 0) |
30 | return -EINVAL; | |
e71bf0d0 | 31 | |
fa9156ae CH |
32 | if (op == BLKPG_DEL_PARTITION) |
33 | return bdev_del_partition(bdev, p.pno); | |
e71bf0d0 | 34 | |
fa9156ae CH |
35 | start = p.start >> SECTOR_SHIFT; |
36 | length = p.length >> SECTOR_SHIFT; | |
e71bf0d0 | 37 | |
fa9156ae CH |
38 | /* check for fit in a hd_struct */ |
39 | if (sizeof(sector_t) < sizeof(long long)) { | |
40 | long pstart = start, plength = length; | |
1da177e4 | 41 | |
fa9156ae CH |
42 | if (pstart != start || plength != length || pstart < 0 || |
43 | plength < 0 || p.pno > 65535) | |
44 | return -EINVAL; | |
45 | } | |
1da177e4 | 46 | |
fa9156ae CH |
47 | switch (op) { |
48 | case BLKPG_ADD_PARTITION: | |
49 | /* check if partition is aligned to blocksize */ | |
50 | if (p.start & (bdev_logical_block_size(bdev) - 1)) | |
1da177e4 | 51 | return -EINVAL; |
fa9156ae CH |
52 | return bdev_add_partition(bdev, p.pno, start, length); |
53 | case BLKPG_RESIZE_PARTITION: | |
54 | return bdev_resize_partition(bdev, p.pno, start, length); | |
55 | default: | |
56 | return -EINVAL; | |
1da177e4 LT |
57 | } |
58 | } | |
59 | ||
5fb889f5 AB |
60 | static int blkpg_ioctl(struct block_device *bdev, |
61 | struct blkpg_ioctl_arg __user *arg) | |
62 | { | |
63 | struct blkpg_partition __user *udata; | |
64 | int op; | |
65 | ||
66 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
67 | return -EFAULT; | |
68 | ||
69 | return blkpg_do_ioctl(bdev, udata, op); | |
70 | } | |
71 | ||
72 | #ifdef CONFIG_COMPAT | |
73 | struct compat_blkpg_ioctl_arg { | |
74 | compat_int_t op; | |
75 | compat_int_t flags; | |
76 | compat_int_t datalen; | |
77 | compat_caddr_t data; | |
78 | }; | |
79 | ||
80 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
81 | struct compat_blkpg_ioctl_arg __user *arg) | |
82 | { | |
83 | compat_caddr_t udata; | |
84 | int op; | |
85 | ||
86 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
87 | return -EFAULT; | |
88 | ||
89 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
90 | } | |
91 | #endif | |
92 | ||
f0b870df | 93 | static int blkdev_reread_part(struct block_device *bdev) |
1da177e4 | 94 | { |
f0b870df CH |
95 | int ret; |
96 | ||
142fe8f4 | 97 | if (!disk_part_scan_enabled(bdev->bd_disk) || bdev != bdev->bd_contains) |
1da177e4 LT |
98 | return -EINVAL; |
99 | if (!capable(CAP_SYS_ADMIN)) | |
100 | return -EACCES; | |
be324177 | 101 | |
b04a5636 | 102 | mutex_lock(&bdev->bd_mutex); |
f0b870df | 103 | ret = bdev_disk_changed(bdev, false); |
c039e313 | 104 | mutex_unlock(&bdev->bd_mutex); |
be324177 | 105 | |
f0b870df | 106 | return ret; |
1da177e4 LT |
107 | } |
108 | ||
d8e4bb81 CH |
109 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
110 | unsigned long arg, unsigned long flags) | |
d30a2605 | 111 | { |
d8e4bb81 CH |
112 | uint64_t range[2]; |
113 | uint64_t start, len; | |
351499a1 DM |
114 | struct request_queue *q = bdev_get_queue(bdev); |
115 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
116 | ||
d8e4bb81 CH |
117 | |
118 | if (!(mode & FMODE_WRITE)) | |
119 | return -EBADF; | |
120 | ||
351499a1 DM |
121 | if (!blk_queue_discard(q)) |
122 | return -EOPNOTSUPP; | |
123 | ||
d8e4bb81 CH |
124 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
125 | return -EFAULT; | |
126 | ||
127 | start = range[0]; | |
128 | len = range[1]; | |
8d57a98c | 129 | |
d30a2605 DW |
130 | if (start & 511) |
131 | return -EINVAL; | |
132 | if (len & 511) | |
133 | return -EINVAL; | |
d30a2605 | 134 | |
351499a1 | 135 | if (start + len > i_size_read(bdev->bd_inode)) |
d30a2605 | 136 | return -EINVAL; |
0bd1ed48 | 137 | truncate_inode_pages_range(mapping, start, start + len - 1); |
351499a1 DM |
138 | return blkdev_issue_discard(bdev, start >> 9, len >> 9, |
139 | GFP_KERNEL, flags); | |
d30a2605 DW |
140 | } |
141 | ||
d8e4bb81 CH |
142 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
143 | unsigned long arg) | |
66ba32dc | 144 | { |
d8e4bb81 | 145 | uint64_t range[2]; |
22dd6d35 DW |
146 | struct address_space *mapping; |
147 | uint64_t start, end, len; | |
d8e4bb81 CH |
148 | |
149 | if (!(mode & FMODE_WRITE)) | |
150 | return -EBADF; | |
151 | ||
152 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
153 | return -EFAULT; | |
154 | ||
155 | start = range[0]; | |
156 | len = range[1]; | |
22dd6d35 | 157 | end = start + len - 1; |
d8e4bb81 | 158 | |
66ba32dc MP |
159 | if (start & 511) |
160 | return -EINVAL; | |
161 | if (len & 511) | |
162 | return -EINVAL; | |
22dd6d35 DW |
163 | if (end >= (uint64_t)i_size_read(bdev->bd_inode)) |
164 | return -EINVAL; | |
165 | if (end < start) | |
66ba32dc MP |
166 | return -EINVAL; |
167 | ||
22dd6d35 DW |
168 | /* Invalidate the page cache, including dirty pages */ |
169 | mapping = bdev->bd_inode->i_mapping; | |
170 | truncate_inode_pages_range(mapping, start, end); | |
171 | ||
172 | return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
ee472d83 | 173 | BLKDEV_ZERO_NOUNMAP); |
66ba32dc MP |
174 | } |
175 | ||
9b81648c | 176 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 177 | { |
9b81648c | 178 | return put_user(val, argp); |
1da177e4 LT |
179 | } |
180 | ||
9b81648c | 181 | static int put_int(int __user *argp, int val) |
1da177e4 | 182 | { |
9b81648c | 183 | return put_user(val, argp); |
1da177e4 LT |
184 | } |
185 | ||
9b81648c | 186 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 187 | { |
9b81648c | 188 | return put_user(val, argp); |
ac481c20 MP |
189 | } |
190 | ||
9b81648c | 191 | static int put_long(long __user *argp, long val) |
1da177e4 | 192 | { |
9b81648c | 193 | return put_user(val, argp); |
1da177e4 LT |
194 | } |
195 | ||
9b81648c | 196 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 197 | { |
9b81648c | 198 | return put_user(val, argp); |
1da177e4 LT |
199 | } |
200 | ||
9b81648c | 201 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 202 | { |
9b81648c | 203 | return put_user(val, argp); |
1da177e4 LT |
204 | } |
205 | ||
bdc1ddad | 206 | #ifdef CONFIG_COMPAT |
c8210a57 | 207 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 208 | { |
9b81648c | 209 | return put_user(val, argp); |
bdc1ddad AB |
210 | } |
211 | ||
c8210a57 | 212 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 213 | { |
9b81648c | 214 | return put_user(val, argp); |
bdc1ddad AB |
215 | } |
216 | #endif | |
217 | ||
633a08b8 AV |
218 | int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, |
219 | unsigned cmd, unsigned long arg) | |
220 | { | |
221 | struct gendisk *disk = bdev->bd_disk; | |
d4430d62 AV |
222 | |
223 | if (disk->fops->ioctl) | |
224 | return disk->fops->ioctl(bdev, mode, cmd, arg); | |
633a08b8 | 225 | |
633a08b8 AV |
226 | return -ENOTTY; |
227 | } | |
228 | /* | |
229 | * For the record: _GPL here is only because somebody decided to slap it | |
230 | * on the previous export. Sheer idiocy, since it wasn't copyrightable | |
231 | * at all and could be open-coded without any exports by anybody who cares. | |
232 | */ | |
233 | EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl); | |
234 | ||
ee6a129d AB |
235 | #ifdef CONFIG_COMPAT |
236 | /* | |
237 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
238 | * drivers that implement only commands that are completely compatible | |
239 | * between 32-bit and 64-bit user space | |
240 | */ | |
241 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode, | |
242 | unsigned cmd, unsigned long arg) | |
243 | { | |
244 | struct gendisk *disk = bdev->bd_disk; | |
245 | ||
246 | if (disk->fops->ioctl) | |
247 | return disk->fops->ioctl(bdev, mode, cmd, | |
248 | (unsigned long)compat_ptr(arg)); | |
249 | ||
250 | return -ENOIOCTLCMD; | |
251 | } | |
252 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
253 | #endif | |
254 | ||
bbd3e064 CH |
255 | static int blkdev_pr_register(struct block_device *bdev, |
256 | struct pr_registration __user *arg) | |
257 | { | |
258 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
259 | struct pr_registration reg; | |
260 | ||
261 | if (!capable(CAP_SYS_ADMIN)) | |
262 | return -EPERM; | |
263 | if (!ops || !ops->pr_register) | |
264 | return -EOPNOTSUPP; | |
265 | if (copy_from_user(®, arg, sizeof(reg))) | |
266 | return -EFAULT; | |
267 | ||
268 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
269 | return -EOPNOTSUPP; | |
270 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
271 | } | |
272 | ||
273 | static int blkdev_pr_reserve(struct block_device *bdev, | |
274 | struct pr_reservation __user *arg) | |
275 | { | |
276 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
277 | struct pr_reservation rsv; | |
278 | ||
279 | if (!capable(CAP_SYS_ADMIN)) | |
280 | return -EPERM; | |
281 | if (!ops || !ops->pr_reserve) | |
282 | return -EOPNOTSUPP; | |
283 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
284 | return -EFAULT; | |
285 | ||
286 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
287 | return -EOPNOTSUPP; | |
288 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
289 | } | |
290 | ||
291 | static int blkdev_pr_release(struct block_device *bdev, | |
292 | struct pr_reservation __user *arg) | |
293 | { | |
294 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
295 | struct pr_reservation rsv; | |
296 | ||
297 | if (!capable(CAP_SYS_ADMIN)) | |
298 | return -EPERM; | |
299 | if (!ops || !ops->pr_release) | |
300 | return -EOPNOTSUPP; | |
301 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
302 | return -EFAULT; | |
303 | ||
304 | if (rsv.flags) | |
305 | return -EOPNOTSUPP; | |
306 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
307 | } | |
308 | ||
309 | static int blkdev_pr_preempt(struct block_device *bdev, | |
310 | struct pr_preempt __user *arg, bool abort) | |
311 | { | |
312 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
313 | struct pr_preempt p; | |
314 | ||
315 | if (!capable(CAP_SYS_ADMIN)) | |
316 | return -EPERM; | |
317 | if (!ops || !ops->pr_preempt) | |
318 | return -EOPNOTSUPP; | |
319 | if (copy_from_user(&p, arg, sizeof(p))) | |
320 | return -EFAULT; | |
321 | ||
322 | if (p.flags) | |
323 | return -EOPNOTSUPP; | |
324 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
325 | } | |
326 | ||
327 | static int blkdev_pr_clear(struct block_device *bdev, | |
328 | struct pr_clear __user *arg) | |
329 | { | |
330 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
331 | struct pr_clear c; | |
332 | ||
333 | if (!capable(CAP_SYS_ADMIN)) | |
334 | return -EPERM; | |
335 | if (!ops || !ops->pr_clear) | |
336 | return -EOPNOTSUPP; | |
337 | if (copy_from_user(&c, arg, sizeof(c))) | |
338 | return -EFAULT; | |
339 | ||
340 | if (c.flags) | |
341 | return -EOPNOTSUPP; | |
342 | return ops->pr_clear(bdev, c.key); | |
343 | } | |
344 | ||
07d106d0 LT |
345 | /* |
346 | * Is it an unrecognized ioctl? The correct returns are either | |
347 | * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a | |
348 | * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl | |
349 | * code before returning. | |
350 | * | |
351 | * Confused drivers sometimes return EINVAL, which is wrong. It | |
352 | * means "I understood the ioctl command, but the parameters to | |
353 | * it were wrong". | |
354 | * | |
355 | * We should aim to just fix the broken drivers, the EINVAL case | |
356 | * should go away. | |
357 | */ | |
358 | static inline int is_unrecognized_ioctl(int ret) | |
359 | { | |
360 | return ret == -EINVAL || | |
361 | ret == -ENOTTY || | |
362 | ret == -ENOIOCTLCMD; | |
363 | } | |
364 | ||
d8e4bb81 CH |
365 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
366 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 367 | { |
d8e4bb81 | 368 | int ret; |
bb93e3a5 | 369 | |
d8e4bb81 CH |
370 | if (!capable(CAP_SYS_ADMIN)) |
371 | return -EACCES; | |
bb93e3a5 | 372 | |
d8e4bb81 CH |
373 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
374 | if (!is_unrecognized_ioctl(ret)) | |
375 | return ret; | |
bb93e3a5 | 376 | |
d8e4bb81 CH |
377 | fsync_bdev(bdev); |
378 | invalidate_bdev(bdev); | |
379 | return 0; | |
380 | } | |
d30a2605 | 381 | |
d8e4bb81 CH |
382 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
383 | unsigned cmd, unsigned long arg) | |
384 | { | |
385 | int ret, n; | |
d30a2605 | 386 | |
bb749b31 ID |
387 | if (!capable(CAP_SYS_ADMIN)) |
388 | return -EACCES; | |
389 | ||
d8e4bb81 CH |
390 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
391 | if (!is_unrecognized_ioctl(ret)) | |
392 | return ret; | |
d8e4bb81 CH |
393 | if (get_user(n, (int __user *)arg)) |
394 | return -EFAULT; | |
395 | set_device_ro(bdev, n); | |
396 | return 0; | |
397 | } | |
d30a2605 | 398 | |
d8e4bb81 CH |
399 | static int blkdev_getgeo(struct block_device *bdev, |
400 | struct hd_geometry __user *argp) | |
401 | { | |
402 | struct gendisk *disk = bdev->bd_disk; | |
403 | struct hd_geometry geo; | |
404 | int ret; | |
d30a2605 | 405 | |
d8e4bb81 CH |
406 | if (!argp) |
407 | return -EINVAL; | |
408 | if (!disk->fops->getgeo) | |
409 | return -ENOTTY; | |
410 | ||
411 | /* | |
412 | * We need to set the startsect first, the driver may | |
413 | * want to override it. | |
414 | */ | |
415 | memset(&geo, 0, sizeof(geo)); | |
416 | geo.start = get_start_sect(bdev); | |
417 | ret = disk->fops->getgeo(bdev, &geo); | |
418 | if (ret) | |
419 | return ret; | |
420 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
421 | return -EFAULT; | |
422 | return 0; | |
423 | } | |
66ba32dc | 424 | |
bdc1ddad AB |
425 | #ifdef CONFIG_COMPAT |
426 | struct compat_hd_geometry { | |
427 | unsigned char heads; | |
428 | unsigned char sectors; | |
429 | unsigned short cylinders; | |
430 | u32 start; | |
431 | }; | |
432 | ||
9b81648c AB |
433 | static int compat_hdio_getgeo(struct block_device *bdev, |
434 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 435 | { |
9b81648c | 436 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
437 | struct hd_geometry geo; |
438 | int ret; | |
439 | ||
440 | if (!ugeo) | |
441 | return -EINVAL; | |
442 | if (!disk->fops->getgeo) | |
443 | return -ENOTTY; | |
444 | ||
445 | memset(&geo, 0, sizeof(geo)); | |
446 | /* | |
447 | * We need to set the startsect first, the driver may | |
448 | * want to override it. | |
449 | */ | |
450 | geo.start = get_start_sect(bdev); | |
451 | ret = disk->fops->getgeo(bdev, &geo); | |
452 | if (ret) | |
453 | return ret; | |
454 | ||
455 | ret = copy_to_user(ugeo, &geo, 4); | |
456 | ret |= put_user(geo.start, &ugeo->start); | |
457 | if (ret) | |
458 | ret = -EFAULT; | |
459 | ||
460 | return ret; | |
461 | } | |
462 | #endif | |
463 | ||
d8e4bb81 CH |
464 | /* set the logical block size */ |
465 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
466 | int __user *argp) | |
467 | { | |
468 | int ret, n; | |
66ba32dc | 469 | |
d8e4bb81 CH |
470 | if (!capable(CAP_SYS_ADMIN)) |
471 | return -EACCES; | |
472 | if (!argp) | |
473 | return -EINVAL; | |
474 | if (get_user(n, argp)) | |
475 | return -EFAULT; | |
66ba32dc | 476 | |
d8e4bb81 CH |
477 | if (!(mode & FMODE_EXCL)) { |
478 | bdgrab(bdev); | |
479 | if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0) | |
480 | return -EBUSY; | |
66ba32dc | 481 | } |
d30a2605 | 482 | |
d8e4bb81 CH |
483 | ret = set_blocksize(bdev, n); |
484 | if (!(mode & FMODE_EXCL)) | |
485 | blkdev_put(bdev, mode | FMODE_EXCL); | |
486 | return ret; | |
487 | } | |
a885c8c4 | 488 | |
d8e4bb81 | 489 | /* |
9b81648c AB |
490 | * Common commands that are handled the same way on native and compat |
491 | * user space. Note the separate arg/argp parameters that are needed | |
492 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 493 | */ |
9b81648c AB |
494 | static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, |
495 | unsigned cmd, unsigned long arg, void __user *argp) | |
d8e4bb81 | 496 | { |
d8e4bb81 CH |
497 | unsigned int max_sectors; |
498 | ||
499 | switch (cmd) { | |
500 | case BLKFLSBUF: | |
501 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
502 | case BLKROSET: | |
503 | return blkdev_roset(bdev, mode, cmd, arg); | |
504 | case BLKDISCARD: | |
505 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
506 | case BLKSECDISCARD: | |
507 | return blk_ioctl_discard(bdev, mode, arg, | |
508 | BLKDEV_DISCARD_SECURE); | |
509 | case BLKZEROOUT: | |
510 | return blk_ioctl_zeroout(bdev, mode, arg); | |
3ed05a98 ST |
511 | case BLKREPORTZONE: |
512 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
513 | case BLKRESETZONE: | |
e876df1f AJ |
514 | case BLKOPENZONE: |
515 | case BLKCLOSEZONE: | |
516 | case BLKFINISHZONE: | |
517 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 518 | case BLKGETZONESZ: |
9b81648c | 519 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 520 | case BLKGETNRZONES: |
9b81648c | 521 | return put_uint(argp, blkdev_nr_zones(bdev->bd_disk)); |
45048d09 | 522 | case BLKROGET: |
9b81648c | 523 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 524 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 525 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 526 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 527 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 528 | case BLKIOMIN: |
9b81648c | 529 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 530 | case BLKIOOPT: |
9b81648c | 531 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 532 | case BLKALIGNOFF: |
9b81648c | 533 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 534 | case BLKDISCARDZEROES: |
9b81648c | 535 | return put_uint(argp, 0); |
45048d09 | 536 | case BLKSECTGET: |
63f26496 AM |
537 | max_sectors = min_t(unsigned int, USHRT_MAX, |
538 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 539 | return put_ushort(argp, max_sectors); |
ef00f59c | 540 | case BLKROTATIONAL: |
9b81648c | 541 | return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev))); |
45048d09 AV |
542 | case BLKRASET: |
543 | case BLKFRASET: | |
544 | if(!capable(CAP_SYS_ADMIN)) | |
545 | return -EACCES; | |
efa7c9f9 | 546 | bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 547 | return 0; |
45048d09 | 548 | case BLKRRPART: |
d8e4bb81 | 549 | return blkdev_reread_part(bdev); |
45048d09 AV |
550 | case BLKTRACESTART: |
551 | case BLKTRACESTOP: | |
45048d09 | 552 | case BLKTRACETEARDOWN: |
d8e4bb81 | 553 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
554 | case IOC_PR_REGISTER: |
555 | return blkdev_pr_register(bdev, argp); | |
556 | case IOC_PR_RESERVE: | |
557 | return blkdev_pr_reserve(bdev, argp); | |
558 | case IOC_PR_RELEASE: | |
559 | return blkdev_pr_release(bdev, argp); | |
560 | case IOC_PR_PREEMPT: | |
561 | return blkdev_pr_preempt(bdev, argp, false); | |
562 | case IOC_PR_PREEMPT_ABORT: | |
563 | return blkdev_pr_preempt(bdev, argp, true); | |
564 | case IOC_PR_CLEAR: | |
565 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 566 | default: |
9b81648c | 567 | return -ENOIOCTLCMD; |
45048d09 | 568 | } |
1da177e4 | 569 | } |
9b81648c AB |
570 | |
571 | /* | |
572 | * Always keep this in sync with compat_blkdev_ioctl() | |
573 | * to handle all incompatible commands in both functions. | |
574 | * | |
575 | * New commands must be compatible and go into blkdev_common_ioctl | |
576 | */ | |
577 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
578 | unsigned long arg) | |
579 | { | |
580 | int ret; | |
581 | loff_t size; | |
582 | void __user *argp = (void __user *)arg; | |
583 | ||
584 | switch (cmd) { | |
585 | /* These need separate implementations for the data structure */ | |
586 | case HDIO_GETGEO: | |
587 | return blkdev_getgeo(bdev, argp); | |
588 | case BLKPG: | |
589 | return blkpg_ioctl(bdev, argp); | |
590 | ||
591 | /* Compat mode returns 32-bit data instead of 'long' */ | |
592 | case BLKRAGET: | |
593 | case BLKFRAGET: | |
594 | if (!argp) | |
595 | return -EINVAL; | |
596 | return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512); | |
597 | case BLKGETSIZE: | |
598 | size = i_size_read(bdev->bd_inode); | |
599 | if ((size >> 9) > ~0UL) | |
600 | return -EFBIG; | |
601 | return put_ulong(argp, size >> 9); | |
602 | ||
603 | /* The data is compatible, but the command number is different */ | |
604 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
605 | return put_int(argp, block_size(bdev)); | |
606 | case BLKBSZSET: | |
607 | return blkdev_bszset(bdev, mode, argp); | |
608 | case BLKGETSIZE64: | |
609 | return put_u64(argp, i_size_read(bdev->bd_inode)); | |
610 | ||
611 | /* Incompatible alignment on i386 */ | |
612 | case BLKTRACESETUP: | |
613 | return blk_trace_ioctl(bdev, cmd, argp); | |
614 | default: | |
615 | break; | |
616 | } | |
617 | ||
618 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
619 | if (ret == -ENOIOCTLCMD) | |
620 | return __blkdev_driver_ioctl(bdev, mode, cmd, arg); | |
621 | ||
622 | return ret; | |
623 | } | |
624 | EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */ | |
bdc1ddad AB |
625 | |
626 | #ifdef CONFIG_COMPAT | |
9b81648c | 627 | |
bdc1ddad AB |
628 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
629 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
630 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
631 | ||
632 | /* Most of the generic ioctls are handled in the normal fallback path. | |
633 | This assumes the blkdev's low level compat_ioctl always returns | |
634 | ENOIOCTLCMD for unknown ioctls. */ | |
635 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
636 | { | |
9b81648c AB |
637 | int ret; |
638 | void __user *argp = compat_ptr(arg); | |
bdc1ddad AB |
639 | struct inode *inode = file->f_mapping->host; |
640 | struct block_device *bdev = inode->i_bdev; | |
641 | struct gendisk *disk = bdev->bd_disk; | |
642 | fmode_t mode = file->f_mode; | |
643 | loff_t size; | |
bdc1ddad AB |
644 | |
645 | /* | |
646 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
647 | * to updated it before every ioctl. | |
648 | */ | |
649 | if (file->f_flags & O_NDELAY) | |
650 | mode |= FMODE_NDELAY; | |
651 | else | |
652 | mode &= ~FMODE_NDELAY; | |
653 | ||
654 | switch (cmd) { | |
9b81648c | 655 | /* These need separate implementations for the data structure */ |
bdc1ddad | 656 | case HDIO_GETGEO: |
9b81648c | 657 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 658 | case BLKPG: |
9b81648c AB |
659 | return compat_blkpg_ioctl(bdev, argp); |
660 | ||
661 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
662 | case BLKRAGET: |
663 | case BLKFRAGET: | |
9b81648c | 664 | if (!argp) |
bdc1ddad | 665 | return -EINVAL; |
9b81648c | 666 | return compat_put_long(argp, |
bdc1ddad | 667 | (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad AB |
668 | case BLKGETSIZE: |
669 | size = i_size_read(bdev->bd_inode); | |
670 | if ((size >> 9) > ~0UL) | |
671 | return -EFBIG; | |
9b81648c | 672 | return compat_put_ulong(argp, size >> 9); |
bdc1ddad | 673 | |
9b81648c AB |
674 | /* The data is compatible, but the command number is different */ |
675 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
676 | return put_int(argp, bdev_logical_block_size(bdev)); | |
677 | case BLKBSZSET_32: | |
678 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 679 | case BLKGETSIZE64_32: |
9b81648c | 680 | return put_u64(argp, i_size_read(bdev->bd_inode)); |
bdc1ddad | 681 | |
9b81648c | 682 | /* Incompatible alignment on i386 */ |
bdc1ddad | 683 | case BLKTRACESETUP32: |
9b81648c | 684 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 685 | default: |
9b81648c | 686 | break; |
bdc1ddad | 687 | } |
9b81648c AB |
688 | |
689 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
690 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) | |
691 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
692 | ||
693 | return ret; | |
bdc1ddad AB |
694 | } |
695 | #endif |