1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/backing-dev.h>
19 	struct gendisk *disk = bdev->bd_disk;  in blkpg_do_ioctl()
23 	if (!capable(CAP_SYS_ADMIN))  in blkpg_do_ioctl()
24 		return -EACCES;  in blkpg_do_ioctl()
26 		return -EFAULT;  in blkpg_do_ioctl()
28 		return -EINVAL;  in blkpg_do_ioctl()
31 		return -EINVAL;  in blkpg_do_ioctl()
42 		if (p.start & (bdev_logical_block_size(bdev) - 1))  in blkpg_do_ioctl()
43 			return -EINVAL;  in blkpg_do_ioctl()
48 		return -EINVAL;  in blkpg_do_ioctl()
58 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))  in blkpg_ioctl()
59 		return -EFAULT;  in blkpg_ioctl()
78 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))  in compat_blkpg_ioctl()
79 		return -EFAULT;  in compat_blkpg_ioctl()
85 static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)  in blkdev_reread_part()  argument
89 	if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))  in blkdev_reread_part()
90 		return -EINVAL;  in blkdev_reread_part()
91 	if (!capable(CAP_SYS_ADMIN))  in blkdev_reread_part()
92 		return -EACCES;  in blkdev_reread_part()
93 	if (bdev->bd_disk->open_partitions)  in blkdev_reread_part()
94 		return -EBUSY;  in blkdev_reread_part()
100 	mode &= ~FMODE_EXCL;  in blkdev_reread_part()
101 	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);  in blkdev_reread_part()
103 	tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);  in blkdev_reread_part()
106 	blkdev_put(tmp, mode);  in blkdev_reread_part()
110 static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,  in blk_ioctl_discard()  argument
118 	if (!(mode & FMODE_WRITE))  in blk_ioctl_discard()
119 		return -EBADF;  in blk_ioctl_discard()
122 		return -EOPNOTSUPP;  in blk_ioctl_discard()
125 		return -EFAULT;  in blk_ioctl_discard()
131 		return -EINVAL;  in blk_ioctl_discard()
133 		return -EINVAL;  in blk_ioctl_discard()
135 	if (start + len > i_size_read(bdev->bd_inode))  in blk_ioctl_discard()
136 		return -EINVAL;  in blk_ioctl_discard()
138 	err = truncate_bdev_range(bdev, mode, start, start + len - 1);  in blk_ioctl_discard()
146 static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,  in blk_ioctl_zeroout()  argument
153 	if (!(mode & FMODE_WRITE))  in blk_ioctl_zeroout()
154 		return -EBADF;  in blk_ioctl_zeroout()
157 		return -EFAULT;  in blk_ioctl_zeroout()
161 	end = start + len - 1;  in blk_ioctl_zeroout()
164 		return -EINVAL;  in blk_ioctl_zeroout()
166 		return -EINVAL;  in blk_ioctl_zeroout()
167 	if (end >= (uint64_t)i_size_read(bdev->bd_inode))  in blk_ioctl_zeroout()
168 		return -EINVAL;  in blk_ioctl_zeroout()
170 		return -EINVAL;  in blk_ioctl_zeroout()
173 	err = truncate_bdev_range(bdev, mode, start, end);  in blk_ioctl_zeroout()
227  * between 32-bit and 64-bit user space
229 int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,  in blkdev_compat_ptr_ioctl()  argument
232 	struct gendisk *disk = bdev->bd_disk;  in blkdev_compat_ptr_ioctl()
234 	if (disk->fops->ioctl)  in blkdev_compat_ptr_ioctl()
235 		return disk->fops->ioctl(bdev, mode, cmd,  in blkdev_compat_ptr_ioctl()
238 	return -ENOIOCTLCMD;  in blkdev_compat_ptr_ioctl()
246 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_register()
249 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_register()
250 		return -EPERM;  in blkdev_pr_register()
251 	if (!ops || !ops->pr_register)  in blkdev_pr_register()
252 		return -EOPNOTSUPP;  in blkdev_pr_register()
254 		return -EFAULT;  in blkdev_pr_register()
257 		return -EOPNOTSUPP;  in blkdev_pr_register()
258 	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);  in blkdev_pr_register()
264 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_reserve()
267 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_reserve()
268 		return -EPERM;  in blkdev_pr_reserve()
269 	if (!ops || !ops->pr_reserve)  in blkdev_pr_reserve()
270 		return -EOPNOTSUPP;  in blkdev_pr_reserve()
272 		return -EFAULT;  in blkdev_pr_reserve()
275 		return -EOPNOTSUPP;  in blkdev_pr_reserve()
276 	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);  in blkdev_pr_reserve()
282 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_release()
285 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_release()
286 		return -EPERM;  in blkdev_pr_release()
287 	if (!ops || !ops->pr_release)  in blkdev_pr_release()
288 		return -EOPNOTSUPP;  in blkdev_pr_release()
290 		return -EFAULT;  in blkdev_pr_release()
293 		return -EOPNOTSUPP;  in blkdev_pr_release()
294 	return ops->pr_release(bdev, rsv.key, rsv.type);  in blkdev_pr_release()
300 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_preempt()
303 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_preempt()
304 		return -EPERM;  in blkdev_pr_preempt()
305 	if (!ops || !ops->pr_preempt)  in blkdev_pr_preempt()
306 		return -EOPNOTSUPP;  in blkdev_pr_preempt()
308 		return -EFAULT;  in blkdev_pr_preempt()
311 		return -EOPNOTSUPP;  in blkdev_pr_preempt()
312 	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);  in blkdev_pr_preempt()
318 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_clear()
321 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_clear()
322 		return -EPERM;  in blkdev_pr_clear()
323 	if (!ops || !ops->pr_clear)  in blkdev_pr_clear()
324 		return -EOPNOTSUPP;  in blkdev_pr_clear()
326 		return -EFAULT;  in blkdev_pr_clear()
329 		return -EOPNOTSUPP;  in blkdev_pr_clear()
330 	return ops->pr_clear(bdev, c.key);  in blkdev_pr_clear()
333 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,  in blkdev_flushbuf()  argument
336 	if (!capable(CAP_SYS_ADMIN))  in blkdev_flushbuf()
337 		return -EACCES;  in blkdev_flushbuf()
343 static int blkdev_roset(struct block_device *bdev, fmode_t mode,  in blkdev_roset()  argument
348 	if (!capable(CAP_SYS_ADMIN))  in blkdev_roset()
349 		return -EACCES;  in blkdev_roset()
352 		return -EFAULT;  in blkdev_roset()
353 	if (bdev->bd_disk->fops->set_read_only) {  in blkdev_roset()
354 		ret = bdev->bd_disk->fops->set_read_only(bdev, n);  in blkdev_roset()
358 	bdev->bd_read_only = n;  in blkdev_roset()
365 	struct gendisk *disk = bdev->bd_disk;  in blkdev_getgeo()
370 		return -EINVAL;  in blkdev_getgeo()
371 	if (!disk->fops->getgeo)  in blkdev_getgeo()
372 		return -ENOTTY;  in blkdev_getgeo()
380 	ret = disk->fops->getgeo(bdev, &geo);  in blkdev_getgeo()
384 		return -EFAULT;  in blkdev_getgeo()
399 	struct gendisk *disk = bdev->bd_disk;  in compat_hdio_getgeo()
404 		return -EINVAL;  in compat_hdio_getgeo()
405 	if (!disk->fops->getgeo)  in compat_hdio_getgeo()
406 		return -ENOTTY;  in compat_hdio_getgeo()
414 	ret = disk->fops->getgeo(bdev, &geo);  in compat_hdio_getgeo()
419 	ret |= put_user(geo.start, &ugeo->start);  in compat_hdio_getgeo()
421 		ret = -EFAULT;  in compat_hdio_getgeo()
428 static int blkdev_bszset(struct block_device *bdev, fmode_t mode,  in blkdev_bszset()  argument
433 	if (!capable(CAP_SYS_ADMIN))  in blkdev_bszset()
434 		return -EACCES;  in blkdev_bszset()
436 		return -EINVAL;  in blkdev_bszset()
438 		return -EFAULT;  in blkdev_bszset()
440 	if (mode & FMODE_EXCL)  in blkdev_bszset()
443 	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))  in blkdev_bszset()
444 		return -EBUSY;  in blkdev_bszset()
446 	blkdev_put(bdev, mode | FMODE_EXCL);  in blkdev_bszset()
456 static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,  in blkdev_common_ioctl()  argument
463 		return blkdev_flushbuf(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
465 		return blkdev_roset(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
467 		return blk_ioctl_discard(bdev, mode, arg, 0);  in blkdev_common_ioctl()
469 		return blk_ioctl_discard(bdev, mode, arg,  in blkdev_common_ioctl()
472 		return blk_ioctl_zeroout(bdev, mode, arg);  in blkdev_common_ioctl()
474 		return put_u64(argp, bdev->bd_disk->diskseq);  in blkdev_common_ioctl()
476 		return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
481 		return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
485 		return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));  in blkdev_common_ioctl()
508 		if(!capable(CAP_SYS_ADMIN))  in blkdev_common_ioctl()
509 			return -EACCES;  in blkdev_common_ioctl()
510 		bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;  in blkdev_common_ioctl()
513 		return blkdev_reread_part(bdev, mode);  in blkdev_common_ioctl()
531 		return -ENOIOCTLCMD;  in blkdev_common_ioctl()
541 int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,  in blkdev_ioctl()  argument
555 	/* Compat mode returns 32-bit data instead of 'long' */  in blkdev_ioctl()
559 			return -EINVAL;  in blkdev_ioctl()
561 			(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);  in blkdev_ioctl()
563 		size = i_size_read(bdev->bd_inode);  in blkdev_ioctl()
565 			return -EFBIG;  in blkdev_ioctl()
572 		return blkdev_bszset(bdev, mode, argp);  in blkdev_ioctl()
574 		return put_u64(argp, i_size_read(bdev->bd_inode));  in blkdev_ioctl()
583 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);  in blkdev_ioctl()
584 	if (ret != -ENOIOCTLCMD)  in blkdev_ioctl()
587 	if (!bdev->bd_disk->fops->ioctl)  in blkdev_ioctl()
588 		return -ENOTTY;  in blkdev_ioctl()
589 	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);  in blkdev_ioctl()
606 	struct block_device *bdev = I_BDEV(file->f_mapping->host);  in compat_blkdev_ioctl()
607 	struct gendisk *disk = bdev->bd_disk;  in compat_blkdev_ioctl()
608 	fmode_t mode = file->f_mode;  in compat_blkdev_ioctl()  local
615 	if (file->f_flags & O_NDELAY)  in compat_blkdev_ioctl()
616 		mode |= FMODE_NDELAY;  in compat_blkdev_ioctl()
618 		mode &= ~FMODE_NDELAY;  in compat_blkdev_ioctl()
627 	/* Compat mode returns 32-bit data instead of 'long' */  in compat_blkdev_ioctl()
631 			return -EINVAL;  in compat_blkdev_ioctl()
633 			(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);  in compat_blkdev_ioctl()
635 		size = i_size_read(bdev->bd_inode);  in compat_blkdev_ioctl()
637 			return -EFBIG;  in compat_blkdev_ioctl()
644 		return blkdev_bszset(bdev, mode, argp);  in compat_blkdev_ioctl()
646 		return put_u64(argp, i_size_read(bdev->bd_inode));  in compat_blkdev_ioctl()
655 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);  in compat_blkdev_ioctl()
656 	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)  in compat_blkdev_ioctl()
657 		ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);  in compat_blkdev_ioctl()