[PATCH 28/30] ntfs: use sb_bdev_nr_blocks

[Anton Altaparmakov]

Hi Christoph,

Looks good, thank you.

Best regards,

	Anton

> On 15 Oct 2021, at 14:26, Christoph Hellwig <hch at lst.de> wrote:
> 
> Use the sb_bdev_nr_blocks helper instead of open coding it and clean up
> ntfs_fill_super a bit by moving an assignment a little earlier that has
> no negative side effects.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> Reviewed-by: Kees Cook <keescook at chromium.org>

Acked-by: Anton Altaparmakov <anton at tuxera.com>

> ---
> fs/ntfs/super.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
> index 0d7e948cb29c9..5ae8de09b271b 100644
> --- a/fs/ntfs/super.c
> +++ b/fs/ntfs/super.c
> @@ -2772,13 +2772,12 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
> 	ntfs_debug("Set device block size to %i bytes (block size bits %i).",
> 			blocksize, sb->s_blocksize_bits);
> 	/* Determine the size of the device in units of block_size bytes. */
> -	if (!i_size_read(sb->s_bdev->bd_inode)) {
> +	vol->nr_blocks = sb_bdev_nr_blocks(sb);
> +	if (!vol->nr_blocks) {
> 		if (!silent)
> 			ntfs_error(sb, "Unable to determine device size.");
> 		goto err_out_now;
> 	}
> -	vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
> -			sb->s_blocksize_bits;
> 	/* Read the boot sector and return unlocked buffer head to it. */
> 	if (!(bh = read_ntfs_boot_sector(sb, silent))) {
> 		if (!silent)
> @@ -2816,8 +2815,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
> 			goto err_out_now;
> 		}
> 		BUG_ON(blocksize != sb->s_blocksize);
> -		vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
> -				sb->s_blocksize_bits;
> +		vol->nr_blocks = sb_bdev_nr_blocks(sb);
> 		ntfs_debug("Changed device block size to %i bytes (block size "
> 				"bits %i) to match volume sector size.",
> 				blocksize, sb->s_blocksize_bits);
> -- 
> 2.30.2
> 



-- 
Anton Altaparmakov <anton at tuxera.com> (replace at with @)
Lead in File System Development, Tuxera Inc., http://www.tuxera.com/
Linux NTFS maintainer