Re: [PATCH 28/30] ntfs: use sb_bdev_nr_blocks

Anton Altaparmakov
2021-10-15T14:36:59Z

Hi Christoph,

Looks good, thank you.

Best regards,

Anton

> On 15 Oct 2021, at 14:26, Christoph Hellwig <hch@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@lst.de>
> Reviewed-by: Kees Cook <keescook@chromium.org>

Acked-by: Anton Altaparmakov <anton@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