linux-kernel - Re: [PATCH 4/5] fat: (exportfs) move code to rebuild directory-inode to separate function

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Message-ID: <87zk2wkznc.fsf@devron.myhome.or.jp>
Date:	Mon, 05 Nov 2012 21:22:31 +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>,
	Ravishankar N <ravi.n1@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [PATCH 4/5] fat: (exportfs) move code to rebuild directory-inode to separate function

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

>  /*
> + * Rebuild the parent for a directory that is not connected
> + * to the filesystem root
> + */
> +static
> +struct inode *fat_rebuild_parent(struct super_block *sb, int parent_logstart)
> +{
> +	int search_clus, clus_to_match;
> +	struct msdos_dir_entry *de;
> +	struct inode *parent;
> +	struct msdos_sb_info *sbi = MSDOS_SB(sb);
> +	sector_t blknr = fat_clus_to_blknr(sbi, parent_logstart);
> +	struct buffer_head *parent_bh = sb_bread(sb, blknr);
> +
> +	if (!parent_bh) {
> +		fat_msg(sb, KERN_ERR,
> +			"NFS:unable to read cluster of parent directory");
> +		return NULL;
> +	}
> +	de = (struct msdos_dir_entry *) parent_bh->b_data;
> +	clus_to_match = fat_get_start(sbi, &de[0]);
> +	search_clus = fat_get_start(sbi, &de[1]);
> +	if (!search_clus)
> +		search_clus = sbi->root_cluster;
> +	brelse(parent_bh);
> +	do {
> +		parent =  fat_traverse_cluster(sb,
> +					search_clus, clus_to_match);
> +		if (IS_ERR(parent) || parent)
> +			break;
> +		search_clus = fat_read_next_clus(sb, search_clus);

fat_read_next_clus() only supports FAT32? Looks strange.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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