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