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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 | ||
4601b4b1 | 84 | static int blkdev_reread_part(struct block_device *bdev, fmode_t mode) |
1da177e4 | 85 | { |
4601b4b1 | 86 | struct block_device *tmp; |
f0b870df | 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 | |
4601b4b1 CH |
93 | /* |
94 | * Reopen the device to revalidate the driver state and force a | |
95 | * partition rescan. | |
96 | */ | |
97 | mode &= ~FMODE_EXCL; | |
98 | set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state); | |
be324177 | 99 | |
4601b4b1 CH |
100 | tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL); |
101 | if (IS_ERR(tmp)) | |
102 | return PTR_ERR(tmp); | |
103 | blkdev_put(tmp, mode); | |
104 | return 0; | |
1da177e4 LT |
105 | } |
106 | ||
d8e4bb81 CH |
107 | static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, |
108 | unsigned long arg, unsigned long flags) | |
d30a2605 | 109 | { |
d8e4bb81 CH |
110 | uint64_t range[2]; |
111 | uint64_t start, len; | |
351499a1 | 112 | struct request_queue *q = bdev_get_queue(bdev); |
384d87ef | 113 | int err; |
d8e4bb81 CH |
114 | |
115 | if (!(mode & FMODE_WRITE)) | |
116 | return -EBADF; | |
117 | ||
351499a1 DM |
118 | if (!blk_queue_discard(q)) |
119 | return -EOPNOTSUPP; | |
120 | ||
d8e4bb81 CH |
121 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
122 | return -EFAULT; | |
123 | ||
124 | start = range[0]; | |
125 | len = range[1]; | |
8d57a98c | 126 | |
d30a2605 DW |
127 | if (start & 511) |
128 | return -EINVAL; | |
129 | if (len & 511) | |
130 | return -EINVAL; | |
d30a2605 | 131 | |
351499a1 | 132 | if (start + len > i_size_read(bdev->bd_inode)) |
d30a2605 | 133 | return -EINVAL; |
384d87ef JK |
134 | |
135 | err = truncate_bdev_range(bdev, mode, start, start + len - 1); | |
136 | if (err) | |
137 | return err; | |
138 | ||
351499a1 DM |
139 | return blkdev_issue_discard(bdev, start >> 9, len >> 9, |
140 | GFP_KERNEL, flags); | |
d30a2605 DW |
141 | } |
142 | ||
d8e4bb81 CH |
143 | static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, |
144 | unsigned long arg) | |
66ba32dc | 145 | { |
d8e4bb81 | 146 | uint64_t range[2]; |
22dd6d35 | 147 | uint64_t start, end, len; |
384d87ef | 148 | int err; |
d8e4bb81 CH |
149 | |
150 | if (!(mode & FMODE_WRITE)) | |
151 | return -EBADF; | |
152 | ||
153 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) | |
154 | return -EFAULT; | |
155 | ||
156 | start = range[0]; | |
157 | len = range[1]; | |
22dd6d35 | 158 | end = start + len - 1; |
d8e4bb81 | 159 | |
66ba32dc MP |
160 | if (start & 511) |
161 | return -EINVAL; | |
162 | if (len & 511) | |
163 | return -EINVAL; | |
22dd6d35 DW |
164 | if (end >= (uint64_t)i_size_read(bdev->bd_inode)) |
165 | return -EINVAL; | |
166 | if (end < start) | |
66ba32dc MP |
167 | return -EINVAL; |
168 | ||
22dd6d35 | 169 | /* Invalidate the page cache, including dirty pages */ |
384d87ef JK |
170 | err = truncate_bdev_range(bdev, mode, start, end); |
171 | if (err) | |
172 | return err; | |
22dd6d35 DW |
173 | |
174 | return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL, | |
ee472d83 | 175 | BLKDEV_ZERO_NOUNMAP); |
66ba32dc MP |
176 | } |
177 | ||
9b81648c | 178 | static int put_ushort(unsigned short __user *argp, unsigned short val) |
1da177e4 | 179 | { |
9b81648c | 180 | return put_user(val, argp); |
1da177e4 LT |
181 | } |
182 | ||
9b81648c | 183 | static int put_int(int __user *argp, int val) |
1da177e4 | 184 | { |
9b81648c | 185 | return put_user(val, argp); |
1da177e4 LT |
186 | } |
187 | ||
9b81648c | 188 | static int put_uint(unsigned int __user *argp, unsigned int val) |
ac481c20 | 189 | { |
9b81648c | 190 | return put_user(val, argp); |
ac481c20 MP |
191 | } |
192 | ||
9b81648c | 193 | static int put_long(long __user *argp, long val) |
1da177e4 | 194 | { |
9b81648c | 195 | return put_user(val, argp); |
1da177e4 LT |
196 | } |
197 | ||
9b81648c | 198 | static int put_ulong(unsigned long __user *argp, unsigned long val) |
1da177e4 | 199 | { |
9b81648c | 200 | return put_user(val, argp); |
1da177e4 LT |
201 | } |
202 | ||
9b81648c | 203 | static int put_u64(u64 __user *argp, u64 val) |
1da177e4 | 204 | { |
9b81648c | 205 | return put_user(val, argp); |
1da177e4 LT |
206 | } |
207 | ||
bdc1ddad | 208 | #ifdef CONFIG_COMPAT |
c8210a57 | 209 | static int compat_put_long(compat_long_t __user *argp, long val) |
bdc1ddad | 210 | { |
9b81648c | 211 | return put_user(val, argp); |
bdc1ddad AB |
212 | } |
213 | ||
c8210a57 | 214 | static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val) |
bdc1ddad | 215 | { |
9b81648c | 216 | return put_user(val, argp); |
bdc1ddad AB |
217 | } |
218 | #endif | |
219 | ||
ee6a129d AB |
220 | #ifdef CONFIG_COMPAT |
221 | /* | |
222 | * This is the equivalent of compat_ptr_ioctl(), to be used by block | |
223 | * drivers that implement only commands that are completely compatible | |
224 | * between 32-bit and 64-bit user space | |
225 | */ | |
226 | int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode, | |
227 | unsigned cmd, unsigned long arg) | |
228 | { | |
229 | struct gendisk *disk = bdev->bd_disk; | |
230 | ||
231 | if (disk->fops->ioctl) | |
232 | return disk->fops->ioctl(bdev, mode, cmd, | |
233 | (unsigned long)compat_ptr(arg)); | |
234 | ||
235 | return -ENOIOCTLCMD; | |
236 | } | |
237 | EXPORT_SYMBOL(blkdev_compat_ptr_ioctl); | |
238 | #endif | |
239 | ||
bbd3e064 CH |
240 | static int blkdev_pr_register(struct block_device *bdev, |
241 | struct pr_registration __user *arg) | |
242 | { | |
243 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
244 | struct pr_registration reg; | |
245 | ||
246 | if (!capable(CAP_SYS_ADMIN)) | |
247 | return -EPERM; | |
248 | if (!ops || !ops->pr_register) | |
249 | return -EOPNOTSUPP; | |
250 | if (copy_from_user(®, arg, sizeof(reg))) | |
251 | return -EFAULT; | |
252 | ||
253 | if (reg.flags & ~PR_FL_IGNORE_KEY) | |
254 | return -EOPNOTSUPP; | |
255 | return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); | |
256 | } | |
257 | ||
258 | static int blkdev_pr_reserve(struct block_device *bdev, | |
259 | struct pr_reservation __user *arg) | |
260 | { | |
261 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
262 | struct pr_reservation rsv; | |
263 | ||
264 | if (!capable(CAP_SYS_ADMIN)) | |
265 | return -EPERM; | |
266 | if (!ops || !ops->pr_reserve) | |
267 | return -EOPNOTSUPP; | |
268 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
269 | return -EFAULT; | |
270 | ||
271 | if (rsv.flags & ~PR_FL_IGNORE_KEY) | |
272 | return -EOPNOTSUPP; | |
273 | return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); | |
274 | } | |
275 | ||
276 | static int blkdev_pr_release(struct block_device *bdev, | |
277 | struct pr_reservation __user *arg) | |
278 | { | |
279 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
280 | struct pr_reservation rsv; | |
281 | ||
282 | if (!capable(CAP_SYS_ADMIN)) | |
283 | return -EPERM; | |
284 | if (!ops || !ops->pr_release) | |
285 | return -EOPNOTSUPP; | |
286 | if (copy_from_user(&rsv, arg, sizeof(rsv))) | |
287 | return -EFAULT; | |
288 | ||
289 | if (rsv.flags) | |
290 | return -EOPNOTSUPP; | |
291 | return ops->pr_release(bdev, rsv.key, rsv.type); | |
292 | } | |
293 | ||
294 | static int blkdev_pr_preempt(struct block_device *bdev, | |
295 | struct pr_preempt __user *arg, bool abort) | |
296 | { | |
297 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
298 | struct pr_preempt p; | |
299 | ||
300 | if (!capable(CAP_SYS_ADMIN)) | |
301 | return -EPERM; | |
302 | if (!ops || !ops->pr_preempt) | |
303 | return -EOPNOTSUPP; | |
304 | if (copy_from_user(&p, arg, sizeof(p))) | |
305 | return -EFAULT; | |
306 | ||
307 | if (p.flags) | |
308 | return -EOPNOTSUPP; | |
309 | return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); | |
310 | } | |
311 | ||
312 | static int blkdev_pr_clear(struct block_device *bdev, | |
313 | struct pr_clear __user *arg) | |
314 | { | |
315 | const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; | |
316 | struct pr_clear c; | |
317 | ||
318 | if (!capable(CAP_SYS_ADMIN)) | |
319 | return -EPERM; | |
320 | if (!ops || !ops->pr_clear) | |
321 | return -EOPNOTSUPP; | |
322 | if (copy_from_user(&c, arg, sizeof(c))) | |
323 | return -EFAULT; | |
324 | ||
325 | if (c.flags) | |
326 | return -EOPNOTSUPP; | |
327 | return ops->pr_clear(bdev, c.key); | |
328 | } | |
329 | ||
d8e4bb81 CH |
330 | static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, |
331 | unsigned cmd, unsigned long arg) | |
bb93e3a5 | 332 | { |
d8e4bb81 CH |
333 | if (!capable(CAP_SYS_ADMIN)) |
334 | return -EACCES; | |
d8e4bb81 CH |
335 | fsync_bdev(bdev); |
336 | invalidate_bdev(bdev); | |
337 | return 0; | |
338 | } | |
d30a2605 | 339 | |
d8e4bb81 CH |
340 | static int blkdev_roset(struct block_device *bdev, fmode_t mode, |
341 | unsigned cmd, unsigned long arg) | |
342 | { | |
343 | int ret, n; | |
d30a2605 | 344 | |
bb749b31 ID |
345 | if (!capable(CAP_SYS_ADMIN)) |
346 | return -EACCES; | |
347 | ||
d8e4bb81 CH |
348 | if (get_user(n, (int __user *)arg)) |
349 | return -EFAULT; | |
e00adcad CH |
350 | if (bdev->bd_disk->fops->set_read_only) { |
351 | ret = bdev->bd_disk->fops->set_read_only(bdev, n); | |
352 | if (ret) | |
353 | return ret; | |
354 | } | |
83950d35 | 355 | bdev->bd_read_only = n; |
d8e4bb81 CH |
356 | return 0; |
357 | } | |
d30a2605 | 358 | |
d8e4bb81 CH |
359 | static int blkdev_getgeo(struct block_device *bdev, |
360 | struct hd_geometry __user *argp) | |
361 | { | |
362 | struct gendisk *disk = bdev->bd_disk; | |
363 | struct hd_geometry geo; | |
364 | int ret; | |
d30a2605 | 365 | |
d8e4bb81 CH |
366 | if (!argp) |
367 | return -EINVAL; | |
368 | if (!disk->fops->getgeo) | |
369 | return -ENOTTY; | |
370 | ||
371 | /* | |
372 | * We need to set the startsect first, the driver may | |
373 | * want to override it. | |
374 | */ | |
375 | memset(&geo, 0, sizeof(geo)); | |
376 | geo.start = get_start_sect(bdev); | |
377 | ret = disk->fops->getgeo(bdev, &geo); | |
378 | if (ret) | |
379 | return ret; | |
380 | if (copy_to_user(argp, &geo, sizeof(geo))) | |
381 | return -EFAULT; | |
382 | return 0; | |
383 | } | |
66ba32dc | 384 | |
bdc1ddad AB |
385 | #ifdef CONFIG_COMPAT |
386 | struct compat_hd_geometry { | |
387 | unsigned char heads; | |
388 | unsigned char sectors; | |
389 | unsigned short cylinders; | |
390 | u32 start; | |
391 | }; | |
392 | ||
9b81648c AB |
393 | static int compat_hdio_getgeo(struct block_device *bdev, |
394 | struct compat_hd_geometry __user *ugeo) | |
bdc1ddad | 395 | { |
9b81648c | 396 | struct gendisk *disk = bdev->bd_disk; |
bdc1ddad AB |
397 | struct hd_geometry geo; |
398 | int ret; | |
399 | ||
400 | if (!ugeo) | |
401 | return -EINVAL; | |
402 | if (!disk->fops->getgeo) | |
403 | return -ENOTTY; | |
404 | ||
405 | memset(&geo, 0, sizeof(geo)); | |
406 | /* | |
407 | * We need to set the startsect first, the driver may | |
408 | * want to override it. | |
409 | */ | |
410 | geo.start = get_start_sect(bdev); | |
411 | ret = disk->fops->getgeo(bdev, &geo); | |
412 | if (ret) | |
413 | return ret; | |
414 | ||
415 | ret = copy_to_user(ugeo, &geo, 4); | |
416 | ret |= put_user(geo.start, &ugeo->start); | |
417 | if (ret) | |
418 | ret = -EFAULT; | |
419 | ||
420 | return ret; | |
421 | } | |
422 | #endif | |
423 | ||
d8e4bb81 CH |
424 | /* set the logical block size */ |
425 | static int blkdev_bszset(struct block_device *bdev, fmode_t mode, | |
426 | int __user *argp) | |
427 | { | |
428 | int ret, n; | |
66ba32dc | 429 | |
d8e4bb81 CH |
430 | if (!capable(CAP_SYS_ADMIN)) |
431 | return -EACCES; | |
432 | if (!argp) | |
433 | return -EINVAL; | |
434 | if (get_user(n, argp)) | |
435 | return -EFAULT; | |
66ba32dc | 436 | |
47816282 CH |
437 | if (mode & FMODE_EXCL) |
438 | return set_blocksize(bdev, n); | |
d30a2605 | 439 | |
47816282 CH |
440 | if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev))) |
441 | return -EBUSY; | |
d8e4bb81 | 442 | ret = set_blocksize(bdev, n); |
47816282 CH |
443 | blkdev_put(bdev, mode | FMODE_EXCL); |
444 | ||
d8e4bb81 CH |
445 | return ret; |
446 | } | |
a885c8c4 | 447 | |
d8e4bb81 | 448 | /* |
9b81648c AB |
449 | * Common commands that are handled the same way on native and compat |
450 | * user space. Note the separate arg/argp parameters that are needed | |
451 | * to deal with the compat_ptr() conversion. | |
d8e4bb81 | 452 | */ |
9b81648c AB |
453 | static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, |
454 | unsigned cmd, unsigned long arg, void __user *argp) | |
d8e4bb81 | 455 | { |
d8e4bb81 CH |
456 | unsigned int max_sectors; |
457 | ||
458 | switch (cmd) { | |
459 | case BLKFLSBUF: | |
460 | return blkdev_flushbuf(bdev, mode, cmd, arg); | |
461 | case BLKROSET: | |
462 | return blkdev_roset(bdev, mode, cmd, arg); | |
463 | case BLKDISCARD: | |
464 | return blk_ioctl_discard(bdev, mode, arg, 0); | |
465 | case BLKSECDISCARD: | |
466 | return blk_ioctl_discard(bdev, mode, arg, | |
467 | BLKDEV_DISCARD_SECURE); | |
468 | case BLKZEROOUT: | |
469 | return blk_ioctl_zeroout(bdev, mode, arg); | |
3ed05a98 ST |
470 | case BLKREPORTZONE: |
471 | return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); | |
472 | case BLKRESETZONE: | |
e876df1f AJ |
473 | case BLKOPENZONE: |
474 | case BLKCLOSEZONE: | |
475 | case BLKFINISHZONE: | |
476 | return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg); | |
72cd8757 | 477 | case BLKGETZONESZ: |
9b81648c | 478 | return put_uint(argp, bdev_zone_sectors(bdev)); |
65e4e3ee | 479 | case BLKGETNRZONES: |
9b81648c | 480 | return put_uint(argp, blkdev_nr_zones(bdev->bd_disk)); |
45048d09 | 481 | case BLKROGET: |
9b81648c | 482 | return put_int(argp, bdev_read_only(bdev) != 0); |
ac481c20 | 483 | case BLKSSZGET: /* get block device logical block size */ |
9b81648c | 484 | return put_int(argp, bdev_logical_block_size(bdev)); |
ac481c20 | 485 | case BLKPBSZGET: /* get block device physical block size */ |
9b81648c | 486 | return put_uint(argp, bdev_physical_block_size(bdev)); |
ac481c20 | 487 | case BLKIOMIN: |
9b81648c | 488 | return put_uint(argp, bdev_io_min(bdev)); |
ac481c20 | 489 | case BLKIOOPT: |
9b81648c | 490 | return put_uint(argp, bdev_io_opt(bdev)); |
ac481c20 | 491 | case BLKALIGNOFF: |
9b81648c | 492 | return put_int(argp, bdev_alignment_offset(bdev)); |
98262f27 | 493 | case BLKDISCARDZEROES: |
9b81648c | 494 | return put_uint(argp, 0); |
45048d09 | 495 | case BLKSECTGET: |
63f26496 AM |
496 | max_sectors = min_t(unsigned int, USHRT_MAX, |
497 | queue_max_sectors(bdev_get_queue(bdev))); | |
9b81648c | 498 | return put_ushort(argp, max_sectors); |
ef00f59c | 499 | case BLKROTATIONAL: |
9b81648c | 500 | return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev))); |
45048d09 AV |
501 | case BLKRASET: |
502 | case BLKFRASET: | |
503 | if(!capable(CAP_SYS_ADMIN)) | |
504 | return -EACCES; | |
efa7c9f9 | 505 | bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; |
45048d09 | 506 | return 0; |
45048d09 | 507 | case BLKRRPART: |
4601b4b1 | 508 | return blkdev_reread_part(bdev, mode); |
45048d09 AV |
509 | case BLKTRACESTART: |
510 | case BLKTRACESTOP: | |
45048d09 | 511 | case BLKTRACETEARDOWN: |
d8e4bb81 | 512 | return blk_trace_ioctl(bdev, cmd, argp); |
bbd3e064 CH |
513 | case IOC_PR_REGISTER: |
514 | return blkdev_pr_register(bdev, argp); | |
515 | case IOC_PR_RESERVE: | |
516 | return blkdev_pr_reserve(bdev, argp); | |
517 | case IOC_PR_RELEASE: | |
518 | return blkdev_pr_release(bdev, argp); | |
519 | case IOC_PR_PREEMPT: | |
520 | return blkdev_pr_preempt(bdev, argp, false); | |
521 | case IOC_PR_PREEMPT_ABORT: | |
522 | return blkdev_pr_preempt(bdev, argp, true); | |
523 | case IOC_PR_CLEAR: | |
524 | return blkdev_pr_clear(bdev, argp); | |
45048d09 | 525 | default: |
9b81648c | 526 | return -ENOIOCTLCMD; |
45048d09 | 527 | } |
1da177e4 | 528 | } |
9b81648c AB |
529 | |
530 | /* | |
531 | * Always keep this in sync with compat_blkdev_ioctl() | |
532 | * to handle all incompatible commands in both functions. | |
533 | * | |
534 | * New commands must be compatible and go into blkdev_common_ioctl | |
535 | */ | |
536 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, | |
537 | unsigned long arg) | |
538 | { | |
539 | int ret; | |
540 | loff_t size; | |
541 | void __user *argp = (void __user *)arg; | |
542 | ||
543 | switch (cmd) { | |
544 | /* These need separate implementations for the data structure */ | |
545 | case HDIO_GETGEO: | |
546 | return blkdev_getgeo(bdev, argp); | |
547 | case BLKPG: | |
548 | return blkpg_ioctl(bdev, argp); | |
549 | ||
550 | /* Compat mode returns 32-bit data instead of 'long' */ | |
551 | case BLKRAGET: | |
552 | case BLKFRAGET: | |
553 | if (!argp) | |
554 | return -EINVAL; | |
555 | return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512); | |
556 | case BLKGETSIZE: | |
557 | size = i_size_read(bdev->bd_inode); | |
558 | if ((size >> 9) > ~0UL) | |
559 | return -EFBIG; | |
560 | return put_ulong(argp, size >> 9); | |
561 | ||
562 | /* The data is compatible, but the command number is different */ | |
563 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ | |
564 | return put_int(argp, block_size(bdev)); | |
565 | case BLKBSZSET: | |
566 | return blkdev_bszset(bdev, mode, argp); | |
567 | case BLKGETSIZE64: | |
568 | return put_u64(argp, i_size_read(bdev->bd_inode)); | |
569 | ||
570 | /* Incompatible alignment on i386 */ | |
571 | case BLKTRACESETUP: | |
572 | return blk_trace_ioctl(bdev, cmd, argp); | |
573 | default: | |
574 | break; | |
575 | } | |
576 | ||
577 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
a7cb3d2f CH |
578 | if (ret != -ENOIOCTLCMD) |
579 | return ret; | |
9b81648c | 580 | |
a7cb3d2f CH |
581 | if (!bdev->bd_disk->fops->ioctl) |
582 | return -ENOTTY; | |
583 | return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg); | |
9b81648c AB |
584 | } |
585 | EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */ | |
bdc1ddad AB |
586 | |
587 | #ifdef CONFIG_COMPAT | |
9b81648c | 588 | |
bdc1ddad AB |
589 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
590 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
591 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
592 | ||
593 | /* Most of the generic ioctls are handled in the normal fallback path. | |
594 | This assumes the blkdev's low level compat_ioctl always returns | |
595 | ENOIOCTLCMD for unknown ioctls. */ | |
596 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
597 | { | |
9b81648c AB |
598 | int ret; |
599 | void __user *argp = compat_ptr(arg); | |
4e7b5671 | 600 | struct block_device *bdev = I_BDEV(file->f_mapping->host); |
bdc1ddad AB |
601 | struct gendisk *disk = bdev->bd_disk; |
602 | fmode_t mode = file->f_mode; | |
603 | loff_t size; | |
bdc1ddad AB |
604 | |
605 | /* | |
606 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have | |
607 | * to updated it before every ioctl. | |
608 | */ | |
609 | if (file->f_flags & O_NDELAY) | |
610 | mode |= FMODE_NDELAY; | |
611 | else | |
612 | mode &= ~FMODE_NDELAY; | |
613 | ||
614 | switch (cmd) { | |
9b81648c | 615 | /* These need separate implementations for the data structure */ |
bdc1ddad | 616 | case HDIO_GETGEO: |
9b81648c | 617 | return compat_hdio_getgeo(bdev, argp); |
bdc1ddad | 618 | case BLKPG: |
9b81648c AB |
619 | return compat_blkpg_ioctl(bdev, argp); |
620 | ||
621 | /* Compat mode returns 32-bit data instead of 'long' */ | |
bdc1ddad AB |
622 | case BLKRAGET: |
623 | case BLKFRAGET: | |
9b81648c | 624 | if (!argp) |
bdc1ddad | 625 | return -EINVAL; |
9b81648c | 626 | return compat_put_long(argp, |
bdc1ddad | 627 | (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512); |
bdc1ddad AB |
628 | case BLKGETSIZE: |
629 | size = i_size_read(bdev->bd_inode); | |
630 | if ((size >> 9) > ~0UL) | |
631 | return -EFBIG; | |
9b81648c | 632 | return compat_put_ulong(argp, size >> 9); |
bdc1ddad | 633 | |
9b81648c AB |
634 | /* The data is compatible, but the command number is different */ |
635 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
636 | return put_int(argp, bdev_logical_block_size(bdev)); | |
637 | case BLKBSZSET_32: | |
638 | return blkdev_bszset(bdev, mode, argp); | |
bdc1ddad | 639 | case BLKGETSIZE64_32: |
9b81648c | 640 | return put_u64(argp, i_size_read(bdev->bd_inode)); |
bdc1ddad | 641 | |
9b81648c | 642 | /* Incompatible alignment on i386 */ |
bdc1ddad | 643 | case BLKTRACESETUP32: |
9b81648c | 644 | return blk_trace_ioctl(bdev, cmd, argp); |
bdc1ddad | 645 | default: |
9b81648c | 646 | break; |
bdc1ddad | 647 | } |
9b81648c AB |
648 | |
649 | ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp); | |
650 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) | |
651 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); | |
652 | ||
653 | return ret; | |
bdc1ddad AB |
654 | } |
655 | #endif |