1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/backing-dev.h>
22 	if (!capable(CAP_SYS_ADMIN))  in blkpg_do_ioctl()
23 		return -EACCES;  in blkpg_do_ioctl()
25 		return -EFAULT;  in blkpg_do_ioctl()
27 		return -EINVAL;  in blkpg_do_ioctl()
30 		return -EINVAL;  in blkpg_do_ioctl()
44 			return -EINVAL;  in blkpg_do_ioctl()
50 		if (p.start & (bdev_logical_block_size(bdev) - 1))  in blkpg_do_ioctl()
51 			return -EINVAL;  in blkpg_do_ioctl()
56 		return -EINVAL;  in blkpg_do_ioctl()
66 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))  in blkpg_ioctl()
67 		return -EFAULT;  in blkpg_ioctl()
86 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))  in compat_blkpg_ioctl()
87 		return -EFAULT;  in compat_blkpg_ioctl()
97 	if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))  in blkdev_reread_part()
98 		return -EINVAL;  in blkdev_reread_part()
99 	if (!capable(CAP_SYS_ADMIN))  in blkdev_reread_part()
100 		return -EACCES;  in blkdev_reread_part()
102 	mutex_lock(&bdev->bd_mutex);  in blkdev_reread_part()
104 	mutex_unlock(&bdev->bd_mutex);  in blkdev_reread_part()
109 static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,  in blk_ioctl_discard()  argument
117 	if (!(mode & FMODE_WRITE))  in blk_ioctl_discard()
118 		return -EBADF;  in blk_ioctl_discard()
121 		return -EOPNOTSUPP;  in blk_ioctl_discard()
124 		return -EFAULT;  in blk_ioctl_discard()
130 		return -EINVAL;  in blk_ioctl_discard()
132 		return -EINVAL;  in blk_ioctl_discard()
134 	if (start + len > i_size_read(bdev->bd_inode))  in blk_ioctl_discard()
135 		return -EINVAL;  in blk_ioctl_discard()
137 	err = truncate_bdev_range(bdev, mode, start, start + len - 1);  in blk_ioctl_discard()
145 static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,  in blk_ioctl_zeroout()  argument
152 	if (!(mode & FMODE_WRITE))  in blk_ioctl_zeroout()
153 		return -EBADF;  in blk_ioctl_zeroout()
156 		return -EFAULT;  in blk_ioctl_zeroout()
160 	end = start + len - 1;  in blk_ioctl_zeroout()
163 		return -EINVAL;  in blk_ioctl_zeroout()
165 		return -EINVAL;  in blk_ioctl_zeroout()
166 	if (end >= (uint64_t)i_size_read(bdev->bd_inode))  in blk_ioctl_zeroout()
167 		return -EINVAL;  in blk_ioctl_zeroout()
169 		return -EINVAL;  in blk_ioctl_zeroout()
172 	err = truncate_bdev_range(bdev, mode, start, end);  in blk_ioctl_zeroout()
222 int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,  in __blkdev_driver_ioctl()  argument
225 	struct gendisk *disk = bdev->bd_disk;  in __blkdev_driver_ioctl()
227 	if (disk->fops->ioctl)  in __blkdev_driver_ioctl()
228 		return disk->fops->ioctl(bdev, mode, cmd, arg);  in __blkdev_driver_ioctl()
230 	return -ENOTTY;  in __blkdev_driver_ioctl()
235  * at all and could be open-coded without any exports by anybody who cares.
243  * between 32-bit and 64-bit user space
245 int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,  in blkdev_compat_ptr_ioctl()  argument
248 	struct gendisk *disk = bdev->bd_disk;  in blkdev_compat_ptr_ioctl()
250 	if (disk->fops->ioctl)  in blkdev_compat_ptr_ioctl()
251 		return disk->fops->ioctl(bdev, mode, cmd,  in blkdev_compat_ptr_ioctl()
254 	return -ENOIOCTLCMD;  in blkdev_compat_ptr_ioctl()
262 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_register()
265 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_register()
266 		return -EPERM;  in blkdev_pr_register()
267 	if (!ops || !ops->pr_register)  in blkdev_pr_register()
268 		return -EOPNOTSUPP;  in blkdev_pr_register()
270 		return -EFAULT;  in blkdev_pr_register()
273 		return -EOPNOTSUPP;  in blkdev_pr_register()
274 	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);  in blkdev_pr_register()
280 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_reserve()
283 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_reserve()
284 		return -EPERM;  in blkdev_pr_reserve()
285 	if (!ops || !ops->pr_reserve)  in blkdev_pr_reserve()
286 		return -EOPNOTSUPP;  in blkdev_pr_reserve()
288 		return -EFAULT;  in blkdev_pr_reserve()
291 		return -EOPNOTSUPP;  in blkdev_pr_reserve()
292 	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);  in blkdev_pr_reserve()
298 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_release()
301 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_release()
302 		return -EPERM;  in blkdev_pr_release()
303 	if (!ops || !ops->pr_release)  in blkdev_pr_release()
304 		return -EOPNOTSUPP;  in blkdev_pr_release()
306 		return -EFAULT;  in blkdev_pr_release()
309 		return -EOPNOTSUPP;  in blkdev_pr_release()
310 	return ops->pr_release(bdev, rsv.key, rsv.type);  in blkdev_pr_release()
316 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_preempt()
319 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_preempt()
320 		return -EPERM;  in blkdev_pr_preempt()
321 	if (!ops || !ops->pr_preempt)  in blkdev_pr_preempt()
322 		return -EOPNOTSUPP;  in blkdev_pr_preempt()
324 		return -EFAULT;  in blkdev_pr_preempt()
327 		return -EOPNOTSUPP;  in blkdev_pr_preempt()
328 	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);  in blkdev_pr_preempt()
334 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;  in blkdev_pr_clear()
337 	if (!capable(CAP_SYS_ADMIN))  in blkdev_pr_clear()
338 		return -EPERM;  in blkdev_pr_clear()
339 	if (!ops || !ops->pr_clear)  in blkdev_pr_clear()
340 		return -EOPNOTSUPP;  in blkdev_pr_clear()
342 		return -EFAULT;  in blkdev_pr_clear()
345 		return -EOPNOTSUPP;  in blkdev_pr_clear()
346 	return ops->pr_clear(bdev, c.key);  in blkdev_pr_clear()
364 	return	ret == -EINVAL ||  in is_unrecognized_ioctl()
365 		ret == -ENOTTY ||  in is_unrecognized_ioctl()
366 		ret == -ENOIOCTLCMD;  in is_unrecognized_ioctl()
369 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,  in blkdev_flushbuf()  argument
374 	if (!capable(CAP_SYS_ADMIN))  in blkdev_flushbuf()
375 		return -EACCES;  in blkdev_flushbuf()
377 	ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);  in blkdev_flushbuf()
386 static int blkdev_roset(struct block_device *bdev, fmode_t mode,  in blkdev_roset()  argument
391 	if (!capable(CAP_SYS_ADMIN))  in blkdev_roset()
392 		return -EACCES;  in blkdev_roset()
394 	ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);  in blkdev_roset()
398 		return -EFAULT;  in blkdev_roset()
406 	struct gendisk *disk = bdev->bd_disk;  in blkdev_getgeo()
411 		return -EINVAL;  in blkdev_getgeo()
412 	if (!disk->fops->getgeo)  in blkdev_getgeo()
413 		return -ENOTTY;  in blkdev_getgeo()
421 	ret = disk->fops->getgeo(bdev, &geo);  in blkdev_getgeo()
425 		return -EFAULT;  in blkdev_getgeo()
440 	struct gendisk *disk = bdev->bd_disk;  in compat_hdio_getgeo()
445 		return -EINVAL;  in compat_hdio_getgeo()
446 	if (!disk->fops->getgeo)  in compat_hdio_getgeo()
447 		return -ENOTTY;  in compat_hdio_getgeo()
455 	ret = disk->fops->getgeo(bdev, &geo);  in compat_hdio_getgeo()
460 	ret |= put_user(geo.start, &ugeo->start);  in compat_hdio_getgeo()
462 		ret = -EFAULT;  in compat_hdio_getgeo()
469 static int blkdev_bszset(struct block_device *bdev, fmode_t mode,  in blkdev_bszset()  argument
474 	if (!capable(CAP_SYS_ADMIN))  in blkdev_bszset()
475 		return -EACCES;  in blkdev_bszset()
477 		return -EINVAL;  in blkdev_bszset()
479 		return -EFAULT;  in blkdev_bszset()
481 	if (mode & FMODE_EXCL)  in blkdev_bszset()
484 	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))  in blkdev_bszset()
485 		return -EBUSY;  in blkdev_bszset()
487 	blkdev_put(bdev, mode | FMODE_EXCL);  in blkdev_bszset()
497 static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,  in blkdev_common_ioctl()  argument
504 		return blkdev_flushbuf(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
506 		return blkdev_roset(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
508 		return blk_ioctl_discard(bdev, mode, arg, 0);  in blkdev_common_ioctl()
510 		return blk_ioctl_discard(bdev, mode, arg,  in blkdev_common_ioctl()
513 		return blk_ioctl_zeroout(bdev, mode, arg);  in blkdev_common_ioctl()
515 		return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
520 		return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);  in blkdev_common_ioctl()
524 		return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));  in blkdev_common_ioctl()
547 		if(!capable(CAP_SYS_ADMIN))  in blkdev_common_ioctl()
548 			return -EACCES;  in blkdev_common_ioctl()
549 		bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;  in blkdev_common_ioctl()
570 		return -ENOIOCTLCMD;  in blkdev_common_ioctl()
580 int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,  in blkdev_ioctl()  argument
594 	/* Compat mode returns 32-bit data instead of 'long' */  in blkdev_ioctl()
598 			return -EINVAL;  in blkdev_ioctl()
599 		return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);  in blkdev_ioctl()
601 		size = i_size_read(bdev->bd_inode);  in blkdev_ioctl()
603 			return -EFBIG;  in blkdev_ioctl()
610 		return blkdev_bszset(bdev, mode, argp);  in blkdev_ioctl()
612 		return put_u64(argp, i_size_read(bdev->bd_inode));  in blkdev_ioctl()
621 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);  in blkdev_ioctl()
622 	if (ret == -ENOIOCTLCMD)  in blkdev_ioctl()
623 		return __blkdev_driver_ioctl(bdev, mode, cmd, arg);  in blkdev_ioctl()
642 	struct inode *inode = file->f_mapping->host;  in compat_blkdev_ioctl()
643 	struct block_device *bdev = inode->i_bdev;  in compat_blkdev_ioctl()
644 	struct gendisk *disk = bdev->bd_disk;  in compat_blkdev_ioctl()
645 	fmode_t mode = file->f_mode;  in compat_blkdev_ioctl()  local
652 	if (file->f_flags & O_NDELAY)  in compat_blkdev_ioctl()
653 		mode |= FMODE_NDELAY;  in compat_blkdev_ioctl()
655 		mode &= ~FMODE_NDELAY;  in compat_blkdev_ioctl()
664 	/* Compat mode returns 32-bit data instead of 'long' */  in compat_blkdev_ioctl()
668 			return -EINVAL;  in compat_blkdev_ioctl()
670 			       (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);  in compat_blkdev_ioctl()
672 		size = i_size_read(bdev->bd_inode);  in compat_blkdev_ioctl()
674 			return -EFBIG;  in compat_blkdev_ioctl()
681 		return blkdev_bszset(bdev, mode, argp);  in compat_blkdev_ioctl()
683 		return put_u64(argp, i_size_read(bdev->bd_inode));  in compat_blkdev_ioctl()
692 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);  in compat_blkdev_ioctl()
693 	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)  in compat_blkdev_ioctl()
694 		ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);  in compat_blkdev_ioctl()