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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 | ||
4601b4b1 | 85 | static int blkdev_reread_part(struct block_device *bdev, fmode_t mode) |
1da177e4 | 86 | { |
4601b4b1 | 87 | struct block_device *tmp; |
f0b870df | 88 | |
fa01b1e9 | 89 | if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev)) |
1da177e4 LT |
90 | return -EINVAL; |
91 | if (!capable(CAP_SYS_ADMIN)) | |
92 | return -EACCES; | |
ab4b5705 | 93 | if (bdev->bd_disk->open_partitions) |
68e6582e | 94 | return -EBUSY; |
be324177 | 95 | |
4601b4b1 CH |
96 | /* |
97 | * Reopen the device to revalidate the driver state and force a | |
98 | * partition rescan. | |
99 | */ | |
100 | mode &= ~FMODE_EXCL; | |
101 | set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state); | |
be324177 | 102 | |
4601b4b1 CH |
103 | tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL); |
104 | if (IS_ERR(tmp)) | |
105 | return PTR_ERR(tmp); | |
106 | blkdev_put(tmp, mode); | |
107 | return 0; | |
1da177e4 LT |
108 | } |
109 | ||
d8e4bb81 CH |
110 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
111 | unsigned long arg, unsigned long flags) | |
d30a2605 | 112 | { |
d8e4bb81 CH |
113 | uint64_t range[2]; |
114 | uint64_t start, len; | |
351499a1 | 115 | struct request_queue *q = bdev_get_queue(bdev); |
7607c44c | 116 | struct inode *inode = bdev->bd_inode; |
384d87ef | 117 | int err; |
d8e4bb81 CH |
118 | |
119 | if (!(mode & FMODE_WRITE)) | |
120 | return -EBADF; | |
121 | ||
351499a1 DM |
122 | if (!blk_queue_discard(q)) |
123 | return -EOPNOTSUPP; | |
124 | ||
d8e4bb81 CH |
125 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
126 | return -EFAULT; | |
127 | ||
128 | start = range[0]; | |
129 | len = range[1]; | |
8d57a98c | 130 | |
d30a2605 DW |
131 | if (start & 511) |
132 | return -EINVAL; | |
133 | if (len & 511) | |
134 | return -EINVAL; | |
d30a2605 | 135 | |
946e9937 | 136 | if (start + len > bdev_nr_bytes(bdev)) |
d30a2605 | 137 | return -EINVAL; |
384d87ef | 138 | |
7607c44c | 139 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
140 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); |
141 | if (err) | |
7607c44c SK |
142 | goto fail; |
143 | ||
144 | err = blkdev_issue_discard(bdev, start >> 9, len >> 9, | |
145 | GFP_KERNEL, flags); | |
384d87ef | 146 | |
7607c44c SK |
147 | fail: |
148 | filemap_invalidate_unlock(inode->i_mapping); | |
149 | return err; | |
d30a2605 DW |
150 | } |
151 | ||
d8e4bb81 CH |
152 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
153 | unsigned long arg) | |
66ba32dc | 154 | { |
d8e4bb81 | 155 | uint64_t range[2]; |
22dd6d35 | 156 | uint64_t start, end, len; |
35e4c6c1 | 157 | struct inode *inode = bdev->bd_inode; |
384d87ef | 158 | int err; |
d8e4bb81 CH |
159 | |
160 | if (!(mode & FMODE_WRITE)) | |
161 | return -EBADF; | |
162 | ||
163 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
164 | return -EFAULT; | |
165 | ||
166 | start = range[0]; | |
167 | len = range[1]; | |
22dd6d35 | 168 | end = start + len - 1; |
d8e4bb81 | 169 | |
66ba32dc MP |
170 | if (start & 511) |
171 | return -EINVAL; | |
172 | if (len & 511) | |
173 | return -EINVAL; | |
946e9937 | 174 | if (end >= (uint64_t)bdev_nr_bytes(bdev)) |
22dd6d35 DW |
175 | return -EINVAL; |
176 | if (end < start) | |
66ba32dc MP |
177 | return -EINVAL; |
178 | ||
22dd6d35 | 179 | /* Invalidate the page cache, including dirty pages */ |
35e4c6c1 | 180 | filemap_invalidate_lock(inode->i_mapping); |
384d87ef JK |
181 | err = truncate_bdev_range(bdev, mode, start, end); |
182 | if (err) | |
35e4c6c1 SK |
183 | goto fail; |
184 | ||
185 | err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
186 | BLKDEV_ZERO_NOUNMAP); | |
22dd6d35 | 187 | |
35e4c6c1 SK |
188 | fail: |
189 | filemap_invalidate_unlock(inode->i_mapping); | |
190 | return err; | |
66ba32dc MP |
191 | } |
192 | ||
9b81648c | 193 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 194 | { |
9b81648c | 195 | return put_user(val, argp); |
1da177e4 LT |
196 | } |
197 | ||
9b81648c | 198 | static int put_int(int __user *argp, int val) |
1da177e4 | 199 | { |
9b81648c | 200 | return put_user(val, argp); |
1da177e4 LT |
201 | } |
202 | ||
9b81648c | 203 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 204 | { |
9b81648c | 205 | return put_user(val, argp); |
ac481c20 MP |
206 | } |
207 | ||
9b81648c | 208 | static int put_long(long __user *argp, long val) |
1da177e4 | 209 | { |
9b81648c | 210 | return put_user(val, argp); |
1da177e4 LT |
211 | } |
212 | ||
9b81648c | 213 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 214 | { |
9b81648c | 215 | return put_user(val, argp); |
1da177e4 LT |
216 | } |
217 | ||
9b81648c | 218 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 219 | { |
9b81648c | 220 | return put_user(val, argp); |
1da177e4 LT |
221 | } |
222 | ||
bdc1ddad | 223 | #ifdef CONFIG_COMPAT |
c8210a57 | 224 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 225 | { |
9b81648c | 226 | return put_user(val, argp); |
bdc1ddad AB |
227 | } |
228 | ||
c8210a57 | 229 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 230 | { |
9b81648c | 231 | return put_user(val, argp); |
bdc1ddad AB |
232 | } |
233 | #endif | |
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 | ||
d8e4bb81 CH |
345 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
346 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 347 | { |
d8e4bb81 CH |
348 | if (!capable(CAP_SYS_ADMIN)) |
349 | return -EACCES; | |
d8e4bb81 CH |
350 | fsync_bdev(bdev); |
351 | invalidate_bdev(bdev); | |
352 | return 0; | |
353 | } | |
d30a2605 | 354 | |
d8e4bb81 CH |
355 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
356 | unsigned cmd, unsigned long arg) | |
357 | { | |
358 | int ret, n; | |
d30a2605 | 359 | |
bb749b31 ID |
360 | if (!capable(CAP_SYS_ADMIN)) |
361 | return -EACCES; | |
362 | ||
d8e4bb81 CH |
363 | if (get_user(n, (int __user *)arg)) |
364 | return -EFAULT; | |
e00adcad CH |
365 | if (bdev->bd_disk->fops->set_read_only) { |
366 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
367 | if (ret) | |
368 | return ret; | |
369 | } | |
83950d35 | 370 | bdev->bd_read_only = n; |
d8e4bb81 CH |
371 | return 0; |
372 | } | |
d30a2605 | 373 | |
d8e4bb81 CH |
374 | static int blkdev_getgeo(struct block_device *bdev, |
375 | struct hd_geometry __user *argp) | |
376 | { | |
377 | struct gendisk *disk = bdev->bd_disk; | |
378 | struct hd_geometry geo; | |
379 | int ret; | |
d30a2605 | 380 | |
d8e4bb81 CH |
381 | if (!argp) |
382 | return -EINVAL; | |
383 | if (!disk->fops->getgeo) | |
384 | return -ENOTTY; | |
385 | ||
386 | /* | |
387 | * We need to set the startsect first, the driver may | |
388 | * want to override it. | |
389 | */ | |
390 | memset(&geo, 0, sizeof(geo)); | |
391 | geo.start = get_start_sect(bdev); | |
392 | ret = disk->fops->getgeo(bdev, &geo); | |
393 | if (ret) | |
394 | return ret; | |
395 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
396 | return -EFAULT; | |
397 | return 0; | |
398 | } | |
66ba32dc | 399 | |
bdc1ddad AB |
400 | #ifdef CONFIG_COMPAT |
401 | struct compat_hd_geometry { | |
402 | unsigned char heads; | |
403 | unsigned char sectors; | |
404 | unsigned short cylinders; | |
405 | u32 start; | |
406 | }; | |
407 | ||
9b81648c AB |
408 | static int compat_hdio_getgeo(struct block_device *bdev, |
409 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 410 | { |
9b81648c | 411 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
412 | struct hd_geometry geo; |
413 | int ret; | |
414 | ||
415 | if (!ugeo) | |
416 | return -EINVAL; | |
417 | if (!disk->fops->getgeo) | |
418 | return -ENOTTY; | |
419 | ||
420 | memset(&geo, 0, sizeof(geo)); | |
421 | /* | |
422 | * We need to set the startsect first, the driver may | |
423 | * want to override it. | |
424 | */ | |
425 | geo.start = get_start_sect(bdev); | |
426 | ret = disk->fops->getgeo(bdev, &geo); | |
427 | if (ret) | |
428 | return ret; | |
429 | ||
430 | ret = copy_to_user(ugeo, &geo, 4); | |
431 | ret |= put_user(geo.start, &ugeo->start); | |
432 | if (ret) | |
433 | ret = -EFAULT; | |
434 | ||
435 | return ret; | |
436 | } | |
437 | #endif | |
438 | ||
d8e4bb81 CH |
439 | /* set the logical block size */ |
440 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
441 | int __user *argp) | |
442 | { | |
443 | int ret, n; | |
66ba32dc | 444 | |
d8e4bb81 CH |
445 | if (!capable(CAP_SYS_ADMIN)) |
446 | return -EACCES; | |
447 | if (!argp) | |
448 | return -EINVAL; | |
449 | if (get_user(n, argp)) | |
450 | return -EFAULT; | |
66ba32dc | 451 | |
47816282 CH |
452 | if (mode & FMODE_EXCL) |
453 | return set_blocksize(bdev, n); | |
d30a2605 | 454 | |
47816282 CH |
455 | if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev))) |
456 | return -EBUSY; | |
d8e4bb81 | 457 | ret = set_blocksize(bdev, n); |
47816282 CH |
458 | blkdev_put(bdev, mode | FMODE_EXCL); |
459 | ||
d8e4bb81 CH |
460 | return ret; |
461 | } | |
a885c8c4 | 462 | |
d8e4bb81 | 463 | /* |
9b81648c AB |
464 | * Common commands that are handled the same way on native and compat |
465 | * user space. Note the separate arg/argp parameters that are needed | |
466 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 467 | */ |
9b81648c AB |
468 | static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, |
469 | unsigned cmd, unsigned long arg, void __user *argp) | |
d8e4bb81 | 470 | { |
d8e4bb81 CH |
471 | unsigned int max_sectors; |
472 | ||
473 | switch (cmd) { | |
474 | case BLKFLSBUF: | |
475 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
476 | case BLKROSET: | |
477 | return blkdev_roset(bdev, mode, cmd, arg); | |
478 | case BLKDISCARD: | |
479 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
480 | case BLKSECDISCARD: | |
481 | return blk_ioctl_discard(bdev, mode, arg, | |
482 | BLKDEV_DISCARD_SECURE); | |
483 | case BLKZEROOUT: | |
484 | return blk_ioctl_zeroout(bdev, mode, arg); | |
7957d93b MC |
485 | case BLKGETDISKSEQ: |
486 | return put_u64(argp, bdev->bd_disk->diskseq); | |
3ed05a98 ST |
487 | case BLKREPORTZONE: |
488 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
489 | case BLKRESETZONE: | |
e876df1f AJ |
490 | case BLKOPENZONE: |
491 | case BLKCLOSEZONE: | |
492 | case BLKFINISHZONE: | |
493 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 494 | case BLKGETZONESZ: |
9b81648c | 495 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 496 | case BLKGETNRZONES: |
9b81648c | 497 | return put_uint(argp, blkdev_nr_zones(bdev->bd_disk)); |
45048d09 | 498 | case BLKROGET: |
9b81648c | 499 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 500 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 501 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 502 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 503 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 504 | case BLKIOMIN: |
9b81648c | 505 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 506 | case BLKIOOPT: |
9b81648c | 507 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 508 | case BLKALIGNOFF: |
9b81648c | 509 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 510 | case BLKDISCARDZEROES: |
9b81648c | 511 | return put_uint(argp, 0); |
45048d09 | 512 | case BLKSECTGET: |
63f26496 AM |
513 | max_sectors = min_t(unsigned int, USHRT_MAX, |
514 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 515 | return put_ushort(argp, max_sectors); |
ef00f59c | 516 | case BLKROTATIONAL: |
9b81648c | 517 | return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev))); |
45048d09 AV |
518 | case BLKRASET: |
519 | case BLKFRASET: | |
520 | if(!capable(CAP_SYS_ADMIN)) | |
521 | return -EACCES; | |
a11d7fc2 | 522 | bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 523 | return 0; |
45048d09 | 524 | case BLKRRPART: |
4601b4b1 | 525 | return blkdev_reread_part(bdev, mode); |
45048d09 AV |
526 | case BLKTRACESTART: |
527 | case BLKTRACESTOP: | |
45048d09 | 528 | case BLKTRACETEARDOWN: |
d8e4bb81 | 529 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
530 | case IOC_PR_REGISTER: |
531 | return blkdev_pr_register(bdev, argp); | |
532 | case IOC_PR_RESERVE: | |
533 | return blkdev_pr_reserve(bdev, argp); | |
534 | case IOC_PR_RELEASE: | |
535 | return blkdev_pr_release(bdev, argp); | |
536 | case IOC_PR_PREEMPT: | |
537 | return blkdev_pr_preempt(bdev, argp, false); | |
538 | case IOC_PR_PREEMPT_ABORT: | |
539 | return blkdev_pr_preempt(bdev, argp, true); | |
540 | case IOC_PR_CLEAR: | |
541 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 542 | default: |
9b81648c | 543 | return -ENOIOCTLCMD; |
45048d09 | 544 | } |
1da177e4 | 545 | } |
9b81648c AB |
546 | |
547 | /* | |
548 | * Always keep this in sync with compat_blkdev_ioctl() | |
549 | * to handle all incompatible commands in both functions. | |
550 | * | |
551 | * New commands must be compatible and go into blkdev_common_ioctl | |
552 | */ | |
8a709512 | 553 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
9b81648c | 554 | { |
8a709512 | 555 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
9b81648c | 556 | void __user *argp = (void __user *)arg; |
8a709512 | 557 | fmode_t mode = file->f_mode; |
8a709512 CH |
558 | int ret; |
559 | ||
560 | /* | |
561 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
562 | * to updated it before every ioctl. | |
563 | */ | |
564 | if (file->f_flags & O_NDELAY) | |
565 | mode |= FMODE_NDELAY; | |
566 | else | |
567 | mode &= ~FMODE_NDELAY; | |
9b81648c AB |
568 | |
569 | switch (cmd) { | |
570 | /* These need separate implementations for the data structure */ | |
571 | case HDIO_GETGEO: | |
572 | return blkdev_getgeo(bdev, argp); | |
573 | case BLKPG: | |
574 | return blkpg_ioctl(bdev, argp); | |
575 | ||
576 | /* Compat mode returns 32-bit data instead of 'long' */ | |
577 | case BLKRAGET: | |
578 | case BLKFRAGET: | |
579 | if (!argp) | |
580 | return -EINVAL; | |
a11d7fc2 CH |
581 | return put_long(argp, |
582 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); | |
9b81648c | 583 | case BLKGETSIZE: |
946e9937 | 584 | if (bdev_nr_sectors(bdev) > ~0UL) |
9b81648c | 585 | return -EFBIG; |
946e9937 | 586 | return put_ulong(argp, bdev_nr_sectors(bdev)); |
9b81648c AB |
587 | |
588 | /* The data is compatible, but the command number is different */ | |
589 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
590 | return put_int(argp, block_size(bdev)); | |
591 | case BLKBSZSET: | |
592 | return blkdev_bszset(bdev, mode, argp); | |
593 | case BLKGETSIZE64: | |
946e9937 | 594 | return put_u64(argp, bdev_nr_bytes(bdev)); |
9b81648c AB |
595 | |
596 | /* Incompatible alignment on i386 */ | |
597 | case BLKTRACESETUP: | |
598 | return blk_trace_ioctl(bdev, cmd, argp); | |
599 | default: | |
600 | break; | |
601 | } | |
602 | ||
603 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
a7cb3d2f CH |
604 | if (ret != -ENOIOCTLCMD) |
605 | return ret; | |
9b81648c | 606 | |
a7cb3d2f CH |
607 | if (!bdev->bd_disk->fops->ioctl) |
608 | return -ENOTTY; | |
609 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c | 610 | } |
bdc1ddad AB |
611 | |
612 | #ifdef CONFIG_COMPAT | |
9b81648c | 613 | |
bdc1ddad AB |
614 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
615 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
616 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
617 | ||
618 | /* Most of the generic ioctls are handled in the normal fallback path. | |
619 | This assumes the blkdev's low level compat_ioctl always returns | |
620 | ENOIOCTLCMD for unknown ioctls. */ | |
621 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
622 | { | |
9b81648c AB |
623 | int ret; |
624 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 625 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad AB |
626 | struct gendisk *disk = bdev->bd_disk; |
627 | fmode_t mode = file->f_mode; | |
bdc1ddad AB |
628 | |
629 | /* | |
630 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
631 | * to updated it before every ioctl. | |
632 | */ | |
633 | if (file->f_flags & O_NDELAY) | |
634 | mode |= FMODE_NDELAY; | |
635 | else | |
636 | mode &= ~FMODE_NDELAY; | |
637 | ||
638 | switch (cmd) { | |
9b81648c | 639 | /* These need separate implementations for the data structure */ |
bdc1ddad | 640 | case HDIO_GETGEO: |
9b81648c | 641 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 642 | case BLKPG: |
9b81648c AB |
643 | return compat_blkpg_ioctl(bdev, argp); |
644 | ||
645 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
646 | case BLKRAGET: |
647 | case BLKFRAGET: | |
9b81648c | 648 | if (!argp) |
bdc1ddad | 649 | return -EINVAL; |
9b81648c | 650 | return compat_put_long(argp, |
a11d7fc2 | 651 | (bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad | 652 | case BLKGETSIZE: |
946e9937 | 653 | if (bdev_nr_sectors(bdev) > ~0UL) |
bdc1ddad | 654 | return -EFBIG; |
946e9937 | 655 | return compat_put_ulong(argp, bdev_nr_sectors(bdev)); |
bdc1ddad | 656 | |
9b81648c AB |
657 | /* The data is compatible, but the command number is different */ |
658 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
659 | return put_int(argp, bdev_logical_block_size(bdev)); | |
660 | case BLKBSZSET_32: | |
661 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 662 | case BLKGETSIZE64_32: |
946e9937 | 663 | return put_u64(argp, bdev_nr_bytes(bdev)); |
bdc1ddad | 664 | |
9b81648c | 665 | /* Incompatible alignment on i386 */ |
bdc1ddad | 666 | case BLKTRACESETUP32: |
9b81648c | 667 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 668 | default: |
9b81648c | 669 | break; |
bdc1ddad | 670 | } |
9b81648c AB |
671 | |
672 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
673 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) | |
674 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
675 | ||
676 | return ret; | |
bdc1ddad AB |
677 | } |
678 | #endif |