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Date:   Fri, 15 Oct 2021 14:35:40 +0000
From:   Anton Altaparmakov <anton@...era.com>
To:     Christoph Hellwig <hch@....de>
CC:     Jens Axboe <axboe@...nel.dk>, Coly Li <colyli@...e.de>,
        Mike Snitzer <snitzer@...hat.com>, Song Liu <song@...nel.org>,
        David Sterba <dsterba@...e.com>,
        Josef Bacik <josef@...icpanda.com>,
        Theodore Ts'o <tytso@....edu>,
        OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
        Dave Kleikamp <shaggy@...nel.org>,
        Ryusuke Konishi <konishi.ryusuke@...il.com>,
        "Konstantin Komarov" <almaz.alexandrovich@...agon-software.com>,
        Kees Cook <keescook@...omium.org>,
        Phillip Lougher <phillip@...ashfs.org.uk>,
        Jan Kara <jack@...e.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "dm-devel@...hat.com" <dm-devel@...hat.com>,
        "drbd-dev@...ts.linbit.com" <drbd-dev@...ts.linbit.com>,
        "linux-bcache@...r.kernel.org" <linux-bcache@...r.kernel.org>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        "jfs-discussion@...ts.sourceforge.net" 
        <jfs-discussion@...ts.sourceforge.net>,
        "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
        "linux-nilfs@...r.kernel.org" <linux-nilfs@...r.kernel.org>,
        "linux-ntfs-dev@...ts.sourceforge.net" 
        <linux-ntfs-dev@...ts.sourceforge.net>,
        "ntfs3@...ts.linux.dev" <ntfs3@...ts.linux.dev>,
        "reiserfs-devel@...r.kernel.org" <reiserfs-devel@...r.kernel.org>
Subject: Re: [PATCH 28/30] ntfs: use sb_bdev_nr_blocks

Hi Christoph,

Looks good, thank you.

Best regards,

	Anton

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

Acked-by: Anton Altaparmakov <anton@...era.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

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