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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; |
fa01b1e9 | 26 | if (bdev_is_partition(bdev)) |
1da177e4 | 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 | switch (op) { |
39 | case BLKPG_ADD_PARTITION: | |
40 | /* check if partition is aligned to blocksize */ | |
41 | if (p.start & (bdev_logical_block_size(bdev) - 1)) | |
1da177e4 | 42 | return -EINVAL; |
fa9156ae CH |
43 | return bdev_add_partition(bdev, p.pno, start, length); |
44 | case BLKPG_RESIZE_PARTITION: | |
45 | return bdev_resize_partition(bdev, p.pno, start, length); | |
46 | default: | |
47 | return -EINVAL; | |
1da177e4 LT |
48 | } |
49 | } | |
50 | ||
5fb889f5 AB |
51 | static int blkpg_ioctl(struct block_device *bdev, |
52 | struct blkpg_ioctl_arg __user *arg) | |
53 | { | |
54 | struct blkpg_partition __user *udata; | |
55 | int op; | |
56 | ||
57 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
58 | return -EFAULT; | |
59 | ||
60 | return blkpg_do_ioctl(bdev, udata, op); | |
61 | } | |
62 | ||
63 | #ifdef CONFIG_COMPAT | |
64 | struct compat_blkpg_ioctl_arg { | |
65 | compat_int_t op; | |
66 | compat_int_t flags; | |
67 | compat_int_t datalen; | |
68 | compat_caddr_t data; | |
69 | }; | |
70 | ||
71 | static int compat_blkpg_ioctl(struct block_device *bdev, | |
72 | struct compat_blkpg_ioctl_arg __user *arg) | |
73 | { | |
74 | compat_caddr_t udata; | |
75 | int op; | |
76 | ||
77 | if (get_user(op, &arg->op) || get_user(udata, &arg->data)) | |
78 | return -EFAULT; | |
79 | ||
80 | return blkpg_do_ioctl(bdev, compat_ptr(udata), op); | |
81 | } | |
82 | #endif | |
83 | ||
f0b870df | 84 | static int blkdev_reread_part(struct block_device *bdev) |
1da177e4 | 85 | { |
f0b870df CH |
86 | int ret; |
87 | ||
fa01b1e9 | 88 | if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev)) |
1da177e4 LT |
89 | return -EINVAL; |
90 | if (!capable(CAP_SYS_ADMIN)) | |
91 | return -EACCES; | |
be324177 | 92 | |
b04a5636 | 93 | mutex_lock(&bdev->bd_mutex); |
f0b870df | 94 | ret = bdev_disk_changed(bdev, false); |
c039e313 | 95 | mutex_unlock(&bdev->bd_mutex); |
be324177 | 96 | |
f0b870df | 97 | return ret; |
1da177e4 LT |
98 | } |
99 | ||
d8e4bb81 CH |
100 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
101 | unsigned long arg, unsigned long flags) | |
d30a2605 | 102 | { |
d8e4bb81 CH |
103 | uint64_t range[2]; |
104 | uint64_t start, len; | |
351499a1 | 105 | struct request_queue *q = bdev_get_queue(bdev); |
384d87ef | 106 | int err; |
d8e4bb81 CH |
107 | |
108 | if (!(mode & FMODE_WRITE)) | |
109 | return -EBADF; | |
110 | ||
351499a1 DM |
111 | if (!blk_queue_discard(q)) |
112 | return -EOPNOTSUPP; | |
113 | ||
d8e4bb81 CH |
114 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
115 | return -EFAULT; | |
116 | ||
117 | start = range[0]; | |
118 | len = range[1]; | |
8d57a98c | 119 | |
d30a2605 DW |
120 | if (start & 511) |
121 | return -EINVAL; | |
122 | if (len & 511) | |
123 | return -EINVAL; | |
d30a2605 | 124 | |
351499a1 | 125 | if (start + len > i_size_read(bdev->bd_inode)) |
d30a2605 | 126 | return -EINVAL; |
384d87ef JK |
127 | |
128 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
129 | if (err) | |
130 | return err; | |
131 | ||
351499a1 DM |
132 | return blkdev_issue_discard(bdev, start >> 9, len >> 9, |
133 | GFP_KERNEL, flags); | |
d30a2605 DW |
134 | } |
135 | ||
d8e4bb81 CH |
136 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
137 | unsigned long arg) | |
66ba32dc | 138 | { |
d8e4bb81 | 139 | uint64_t range[2]; |
22dd6d35 | 140 | uint64_t start, end, len; |
384d87ef | 141 | int err; |
d8e4bb81 CH |
142 | |
143 | if (!(mode & FMODE_WRITE)) | |
144 | return -EBADF; | |
145 | ||
146 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
147 | return -EFAULT; | |
148 | ||
149 | start = range[0]; | |
150 | len = range[1]; | |
22dd6d35 | 151 | end = start + len - 1; |
d8e4bb81 | 152 | |
66ba32dc MP |
153 | if (start & 511) |
154 | return -EINVAL; | |
155 | if (len & 511) | |
156 | return -EINVAL; | |
22dd6d35 DW |
157 | if (end >= (uint64_t)i_size_read(bdev->bd_inode)) |
158 | return -EINVAL; | |
159 | if (end < start) | |
66ba32dc MP |
160 | return -EINVAL; |
161 | ||
22dd6d35 | 162 | /* Invalidate the page cache, including dirty pages */ |
384d87ef JK |
163 | err = truncate_bdev_range(bdev, mode, start, end); |
164 | if (err) | |
165 | return err; | |
22dd6d35 DW |
166 | |
167 | return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
ee472d83 | 168 | BLKDEV_ZERO_NOUNMAP); |
66ba32dc MP |
169 | } |
170 | ||
9b81648c | 171 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 172 | { |
9b81648c | 173 | return put_user(val, argp); |
1da177e4 LT |
174 | } |
175 | ||
9b81648c | 176 | static int put_int(int __user *argp, int val) |
1da177e4 | 177 | { |
9b81648c | 178 | return put_user(val, argp); |
1da177e4 LT |
179 | } |
180 | ||
9b81648c | 181 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 182 | { |
9b81648c | 183 | return put_user(val, argp); |
ac481c20 MP |
184 | } |
185 | ||
9b81648c | 186 | static int put_long(long __user *argp, long val) |
1da177e4 | 187 | { |
9b81648c | 188 | return put_user(val, argp); |
1da177e4 LT |
189 | } |
190 | ||
9b81648c | 191 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 192 | { |
9b81648c | 193 | return put_user(val, argp); |
1da177e4 LT |
194 | } |
195 | ||
9b81648c | 196 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 197 | { |
9b81648c | 198 | return put_user(val, argp); |
1da177e4 LT |
199 | } |
200 | ||
bdc1ddad | 201 | #ifdef CONFIG_COMPAT |
c8210a57 | 202 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 203 | { |
9b81648c | 204 | return put_user(val, argp); |
bdc1ddad AB |
205 | } |
206 | ||
c8210a57 | 207 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 208 | { |
9b81648c | 209 | return put_user(val, argp); |
bdc1ddad AB |
210 | } |
211 | #endif | |
212 | ||
ee6a129d AB |
213 | #ifdef CONFIG_COMPAT |
214 | /* | |
215 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
216 | * drivers that implement only commands that are completely compatible | |
217 | * between 32-bit and 64-bit user space | |
218 | */ | |
219 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode, | |
220 | unsigned cmd, unsigned long arg) | |
221 | { | |
222 | struct gendisk *disk = bdev->bd_disk; | |
223 | ||
224 | if (disk->fops->ioctl) | |
225 | return disk->fops->ioctl(bdev, mode, cmd, | |
226 | (unsigned long)compat_ptr(arg)); | |
227 | ||
228 | return -ENOIOCTLCMD; | |
229 | } | |
230 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
231 | #endif | |
232 | ||
bbd3e064 CH |
233 | static int blkdev_pr_register(struct block_device *bdev, |
234 | struct pr_registration __user *arg) | |
235 | { | |
236 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
237 | struct pr_registration reg; | |
238 | ||
239 | if (!capable(CAP_SYS_ADMIN)) | |
240 | return -EPERM; | |
241 | if (!ops || !ops->pr_register) | |
242 | return -EOPNOTSUPP; | |
243 | if (copy_from_user(®, arg, sizeof(reg))) | |
244 | return -EFAULT; | |
245 | ||
246 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
247 | return -EOPNOTSUPP; | |
248 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
249 | } | |
250 | ||
251 | static int blkdev_pr_reserve(struct block_device *bdev, | |
252 | struct pr_reservation __user *arg) | |
253 | { | |
254 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
255 | struct pr_reservation rsv; | |
256 | ||
257 | if (!capable(CAP_SYS_ADMIN)) | |
258 | return -EPERM; | |
259 | if (!ops || !ops->pr_reserve) | |
260 | return -EOPNOTSUPP; | |
261 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
262 | return -EFAULT; | |
263 | ||
264 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
265 | return -EOPNOTSUPP; | |
266 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
267 | } | |
268 | ||
269 | static int blkdev_pr_release(struct block_device *bdev, | |
270 | struct pr_reservation __user *arg) | |
271 | { | |
272 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
273 | struct pr_reservation rsv; | |
274 | ||
275 | if (!capable(CAP_SYS_ADMIN)) | |
276 | return -EPERM; | |
277 | if (!ops || !ops->pr_release) | |
278 | return -EOPNOTSUPP; | |
279 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
280 | return -EFAULT; | |
281 | ||
282 | if (rsv.flags) | |
283 | return -EOPNOTSUPP; | |
284 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
285 | } | |
286 | ||
287 | static int blkdev_pr_preempt(struct block_device *bdev, | |
288 | struct pr_preempt __user *arg, bool abort) | |
289 | { | |
290 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
291 | struct pr_preempt p; | |
292 | ||
293 | if (!capable(CAP_SYS_ADMIN)) | |
294 | return -EPERM; | |
295 | if (!ops || !ops->pr_preempt) | |
296 | return -EOPNOTSUPP; | |
297 | if (copy_from_user(&p, arg, sizeof(p))) | |
298 | return -EFAULT; | |
299 | ||
300 | if (p.flags) | |
301 | return -EOPNOTSUPP; | |
302 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
303 | } | |
304 | ||
305 | static int blkdev_pr_clear(struct block_device *bdev, | |
306 | struct pr_clear __user *arg) | |
307 | { | |
308 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
309 | struct pr_clear c; | |
310 | ||
311 | if (!capable(CAP_SYS_ADMIN)) | |
312 | return -EPERM; | |
313 | if (!ops || !ops->pr_clear) | |
314 | return -EOPNOTSUPP; | |
315 | if (copy_from_user(&c, arg, sizeof(c))) | |
316 | return -EFAULT; | |
317 | ||
318 | if (c.flags) | |
319 | return -EOPNOTSUPP; | |
320 | return ops->pr_clear(bdev, c.key); | |
321 | } | |
322 | ||
d8e4bb81 CH |
323 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
324 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 325 | { |
d8e4bb81 CH |
326 | if (!capable(CAP_SYS_ADMIN)) |
327 | return -EACCES; | |
d8e4bb81 CH |
328 | fsync_bdev(bdev); |
329 | invalidate_bdev(bdev); | |
330 | return 0; | |
331 | } | |
d30a2605 | 332 | |
d8e4bb81 CH |
333 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
334 | unsigned cmd, unsigned long arg) | |
335 | { | |
336 | int ret, n; | |
d30a2605 | 337 | |
bb749b31 ID |
338 | if (!capable(CAP_SYS_ADMIN)) |
339 | return -EACCES; | |
340 | ||
d8e4bb81 CH |
341 | if (get_user(n, (int __user *)arg)) |
342 | return -EFAULT; | |
e00adcad CH |
343 | if (bdev->bd_disk->fops->set_read_only) { |
344 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
345 | if (ret) | |
346 | return ret; | |
347 | } | |
83950d35 | 348 | bdev->bd_read_only = n; |
d8e4bb81 CH |
349 | return 0; |
350 | } | |
d30a2605 | 351 | |
d8e4bb81 CH |
352 | static int blkdev_getgeo(struct block_device *bdev, |
353 | struct hd_geometry __user *argp) | |
354 | { | |
355 | struct gendisk *disk = bdev->bd_disk; | |
356 | struct hd_geometry geo; | |
357 | int ret; | |
d30a2605 | 358 | |
d8e4bb81 CH |
359 | if (!argp) |
360 | return -EINVAL; | |
361 | if (!disk->fops->getgeo) | |
362 | return -ENOTTY; | |
363 | ||
364 | /* | |
365 | * We need to set the startsect first, the driver may | |
366 | * want to override it. | |
367 | */ | |
368 | memset(&geo, 0, sizeof(geo)); | |
369 | geo.start = get_start_sect(bdev); | |
370 | ret = disk->fops->getgeo(bdev, &geo); | |
371 | if (ret) | |
372 | return ret; | |
373 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
374 | return -EFAULT; | |
375 | return 0; | |
376 | } | |
66ba32dc | 377 | |
bdc1ddad AB |
378 | #ifdef CONFIG_COMPAT |
379 | struct compat_hd_geometry { | |
380 | unsigned char heads; | |
381 | unsigned char sectors; | |
382 | unsigned short cylinders; | |
383 | u32 start; | |
384 | }; | |
385 | ||
9b81648c AB |
386 | static int compat_hdio_getgeo(struct block_device *bdev, |
387 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 388 | { |
9b81648c | 389 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
390 | struct hd_geometry geo; |
391 | int ret; | |
392 | ||
393 | if (!ugeo) | |
394 | return -EINVAL; | |
395 | if (!disk->fops->getgeo) | |
396 | return -ENOTTY; | |
397 | ||
398 | memset(&geo, 0, sizeof(geo)); | |
399 | /* | |
400 | * We need to set the startsect first, the driver may | |
401 | * want to override it. | |
402 | */ | |
403 | geo.start = get_start_sect(bdev); | |
404 | ret = disk->fops->getgeo(bdev, &geo); | |
405 | if (ret) | |
406 | return ret; | |
407 | ||
408 | ret = copy_to_user(ugeo, &geo, 4); | |
409 | ret |= put_user(geo.start, &ugeo->start); | |
410 | if (ret) | |
411 | ret = -EFAULT; | |
412 | ||
413 | return ret; | |
414 | } | |
415 | #endif | |
416 | ||
d8e4bb81 CH |
417 | /* set the logical block size */ |
418 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
419 | int __user *argp) | |
420 | { | |
421 | int ret, n; | |
66ba32dc | 422 | |
d8e4bb81 CH |
423 | if (!capable(CAP_SYS_ADMIN)) |
424 | return -EACCES; | |
425 | if (!argp) | |
426 | return -EINVAL; | |
427 | if (get_user(n, argp)) | |
428 | return -EFAULT; | |
66ba32dc | 429 | |
47816282 CH |
430 | if (mode & FMODE_EXCL) |
431 | return set_blocksize(bdev, n); | |
d30a2605 | 432 | |
47816282 CH |
433 | if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev))) |
434 | return -EBUSY; | |
d8e4bb81 | 435 | ret = set_blocksize(bdev, n); |
47816282 CH |
436 | blkdev_put(bdev, mode | FMODE_EXCL); |
437 | ||
d8e4bb81 CH |
438 | return ret; |
439 | } | |
a885c8c4 | 440 | |
d8e4bb81 | 441 | /* |
9b81648c AB |
442 | * Common commands that are handled the same way on native and compat |
443 | * user space. Note the separate arg/argp parameters that are needed | |
444 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 445 | */ |
9b81648c AB |
446 | static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, |
447 | unsigned cmd, unsigned long arg, void __user *argp) | |
d8e4bb81 | 448 | { |
d8e4bb81 CH |
449 | unsigned int max_sectors; |
450 | ||
451 | switch (cmd) { | |
452 | case BLKFLSBUF: | |
453 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
454 | case BLKROSET: | |
455 | return blkdev_roset(bdev, mode, cmd, arg); | |
456 | case BLKDISCARD: | |
457 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
458 | case BLKSECDISCARD: | |
459 | return blk_ioctl_discard(bdev, mode, arg, | |
460 | BLKDEV_DISCARD_SECURE); | |
461 | case BLKZEROOUT: | |
462 | return blk_ioctl_zeroout(bdev, mode, arg); | |
3ed05a98 ST |
463 | case BLKREPORTZONE: |
464 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
465 | case BLKRESETZONE: | |
e876df1f AJ |
466 | case BLKOPENZONE: |
467 | case BLKCLOSEZONE: | |
468 | case BLKFINISHZONE: | |
469 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 470 | case BLKGETZONESZ: |
9b81648c | 471 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 472 | case BLKGETNRZONES: |
9b81648c | 473 | return put_uint(argp, blkdev_nr_zones(bdev->bd_disk)); |
45048d09 | 474 | case BLKROGET: |
9b81648c | 475 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 476 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 477 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 478 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 479 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 480 | case BLKIOMIN: |
9b81648c | 481 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 482 | case BLKIOOPT: |
9b81648c | 483 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 484 | case BLKALIGNOFF: |
9b81648c | 485 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 486 | case BLKDISCARDZEROES: |
9b81648c | 487 | return put_uint(argp, 0); |
45048d09 | 488 | case BLKSECTGET: |
63f26496 AM |
489 | max_sectors = min_t(unsigned int, USHRT_MAX, |
490 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 491 | return put_ushort(argp, max_sectors); |
ef00f59c | 492 | case BLKROTATIONAL: |
9b81648c | 493 | return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev))); |
45048d09 AV |
494 | case BLKRASET: |
495 | case BLKFRASET: | |
496 | if(!capable(CAP_SYS_ADMIN)) | |
497 | return -EACCES; | |
efa7c9f9 | 498 | bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 499 | return 0; |
45048d09 | 500 | case BLKRRPART: |
d8e4bb81 | 501 | return blkdev_reread_part(bdev); |
45048d09 AV |
502 | case BLKTRACESTART: |
503 | case BLKTRACESTOP: | |
45048d09 | 504 | case BLKTRACETEARDOWN: |
d8e4bb81 | 505 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
506 | case IOC_PR_REGISTER: |
507 | return blkdev_pr_register(bdev, argp); | |
508 | case IOC_PR_RESERVE: | |
509 | return blkdev_pr_reserve(bdev, argp); | |
510 | case IOC_PR_RELEASE: | |
511 | return blkdev_pr_release(bdev, argp); | |
512 | case IOC_PR_PREEMPT: | |
513 | return blkdev_pr_preempt(bdev, argp, false); | |
514 | case IOC_PR_PREEMPT_ABORT: | |
515 | return blkdev_pr_preempt(bdev, argp, true); | |
516 | case IOC_PR_CLEAR: | |
517 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 518 | default: |
9b81648c | 519 | return -ENOIOCTLCMD; |
45048d09 | 520 | } |
1da177e4 | 521 | } |
9b81648c AB |
522 | |
523 | /* | |
524 | * Always keep this in sync with compat_blkdev_ioctl() | |
525 | * to handle all incompatible commands in both functions. | |
526 | * | |
527 | * New commands must be compatible and go into blkdev_common_ioctl | |
528 | */ | |
529 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
530 | unsigned long arg) | |
531 | { | |
532 | int ret; | |
533 | loff_t size; | |
534 | void __user *argp = (void __user *)arg; | |
535 | ||
536 | switch (cmd) { | |
537 | /* These need separate implementations for the data structure */ | |
538 | case HDIO_GETGEO: | |
539 | return blkdev_getgeo(bdev, argp); | |
540 | case BLKPG: | |
541 | return blkpg_ioctl(bdev, argp); | |
542 | ||
543 | /* Compat mode returns 32-bit data instead of 'long' */ | |
544 | case BLKRAGET: | |
545 | case BLKFRAGET: | |
546 | if (!argp) | |
547 | return -EINVAL; | |
548 | return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512); | |
549 | case BLKGETSIZE: | |
550 | size = i_size_read(bdev->bd_inode); | |
551 | if ((size >> 9) > ~0UL) | |
552 | return -EFBIG; | |
553 | return put_ulong(argp, size >> 9); | |
554 | ||
555 | /* The data is compatible, but the command number is different */ | |
556 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
557 | return put_int(argp, block_size(bdev)); | |
558 | case BLKBSZSET: | |
559 | return blkdev_bszset(bdev, mode, argp); | |
560 | case BLKGETSIZE64: | |
561 | return put_u64(argp, i_size_read(bdev->bd_inode)); | |
562 | ||
563 | /* Incompatible alignment on i386 */ | |
564 | case BLKTRACESETUP: | |
565 | return blk_trace_ioctl(bdev, cmd, argp); | |
566 | default: | |
567 | break; | |
568 | } | |
569 | ||
570 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
a7cb3d2f CH |
571 | if (ret != -ENOIOCTLCMD) |
572 | return ret; | |
9b81648c | 573 | |
a7cb3d2f CH |
574 | if (!bdev->bd_disk->fops->ioctl) |
575 | return -ENOTTY; | |
576 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c AB |
577 | } |
578 | EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */ | |
bdc1ddad AB |
579 | |
580 | #ifdef CONFIG_COMPAT | |
9b81648c | 581 | |
bdc1ddad AB |
582 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
583 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
584 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
585 | ||
586 | /* Most of the generic ioctls are handled in the normal fallback path. | |
587 | This assumes the blkdev's low level compat_ioctl always returns | |
588 | ENOIOCTLCMD for unknown ioctls. */ | |
589 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
590 | { | |
9b81648c AB |
591 | int ret; |
592 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 593 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad AB |
594 | struct gendisk *disk = bdev->bd_disk; |
595 | fmode_t mode = file->f_mode; | |
596 | loff_t size; | |
bdc1ddad AB |
597 | |
598 | /* | |
599 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
600 | * to updated it before every ioctl. | |
601 | */ | |
602 | if (file->f_flags & O_NDELAY) | |
603 | mode |= FMODE_NDELAY; | |
604 | else | |
605 | mode &= ~FMODE_NDELAY; | |
606 | ||
607 | switch (cmd) { | |
9b81648c | 608 | /* These need separate implementations for the data structure */ |
bdc1ddad | 609 | case HDIO_GETGEO: |
9b81648c | 610 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 611 | case BLKPG: |
9b81648c AB |
612 | return compat_blkpg_ioctl(bdev, argp); |
613 | ||
614 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
615 | case BLKRAGET: |
616 | case BLKFRAGET: | |
9b81648c | 617 | if (!argp) |
bdc1ddad | 618 | return -EINVAL; |
9b81648c | 619 | return compat_put_long(argp, |
bdc1ddad | 620 | (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad AB |
621 | case BLKGETSIZE: |
622 | size = i_size_read(bdev->bd_inode); | |
623 | if ((size >> 9) > ~0UL) | |
624 | return -EFBIG; | |
9b81648c | 625 | return compat_put_ulong(argp, size >> 9); |
bdc1ddad | 626 | |
9b81648c AB |
627 | /* The data is compatible, but the command number is different */ |
628 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
629 | return put_int(argp, bdev_logical_block_size(bdev)); | |
630 | case BLKBSZSET_32: | |
631 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 632 | case BLKGETSIZE64_32: |
9b81648c | 633 | return put_u64(argp, i_size_read(bdev->bd_inode)); |
bdc1ddad | 634 | |
9b81648c | 635 | /* Incompatible alignment on i386 */ |
bdc1ddad | 636 | case BLKTRACESETUP32: |
9b81648c | 637 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 638 | default: |
9b81648c | 639 | break; |
bdc1ddad | 640 | } |
9b81648c AB |
641 | |
642 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
643 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) | |
644 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
645 | ||
646 | return ret; | |
bdc1ddad AB |
647 | } |
648 | #endif |