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block: add a bdev_nr_bytes helper

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Add a helper to query the size of a block device in bytes.  This
will be used to remove open coded access to ->bd_inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20211018101130.1838532-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-18 12:11:02 +02:00 committed by Jens Axboe
parent 99457db8b4
commit 6436bd90f7
1 changed files with 6 additions and 1 deletions
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7
include/linux/genhd.h
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@ -236,9 +236,14 @@ static inline sector_t get_start_sect(struct block_device *bdev)
return bdev->bd_start_sect;
}
static inline loff_t bdev_nr_bytes(struct block_device *bdev)
{
return i_size_read(bdev->bd_inode);
}
static inline sector_t bdev_nr_sectors(struct block_device *bdev)
{
return i_size_read(bdev->bd_inode) >> 9;
return bdev_nr_bytes(bdev) >> SECTOR_SHIFT;
}
static inline sector_t get_capacity(struct gendisk *disk)