linux-kernel - Re: [PATCH v4 5/6] fat: permit to return phy block number by fibmap in fallocated region

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Message-ID: <8738if4jab.fsf@devron.myhome.or.jp>
Date:	Wed, 19 Mar 2014 00:29:32 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Namjae Jeon <linkinjeon@...il.com>
Cc:	akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [PATCH v4 5/6] fat: permit to return phy block number by fibmap in fallocated region

Namjae Jeon <linkinjeon@...il.com> writes:

> +int fat_bmap2(struct inode *inode, sector_t sector,
> +	      unsigned long *mapped_blocks, struct buffer_head *bh_result,
> +	      int create, sector_t *bmap)
> +{
> +	struct super_block *sb = inode->i_sb;
> +	sector_t last_block;
> +	const unsigned long blocksize = sb->s_blocksize;
> +	const unsigned char blocksize_bits = sb->s_blocksize_bits;
> +
> +	BUG_ON(create != 0);
> +
> +	*bmap = 0;
> +	*mapped_blocks = 0;
> +
> +	last_block = (MSDOS_I(inode)->i_disksize + (blocksize - 1))
> +		>> blocksize_bits;
> +
> +	if (sector >= last_block)
> +		return 0;
> +
> +	return fat_get_mapped_cluster(inode, sector, last_block, mapped_blocks,
> +				      bmap);

Maybe, we are better to merge fat_bmap2() and fat_get_block_bmap()?
fat_bmap2() seems to be pointless.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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