linux-kernel - Re: [PATCH 14/22] hostfs: drop vmtruncate

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Message-ID: <20121013162221.GF19899@infradead.org>
Date:	Sat, 13 Oct 2012 12:22:21 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Marco Stornelli <marco.stornelli@...il.com>
Cc:	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Al Viro <viro@...IV.linux.org.uk>,
	Jeff Dike <jdike@...toit.com>,
	Richard Weinberger <richard@....at>,
	user-mode-linux-devel@...ts.sourceforge.net,
	user-mode-linux-user@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/22] hostfs: drop vmtruncate

> +++ b/fs/hostfs/hostfs_kern.c
> @@ -848,9 +848,11 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
>  	    attr->ia_size != i_size_read(inode)) {
>  		int error;
>  
> -		error = vmtruncate(inode, attr->ia_size);
> -		if (err)
> -			return err;
> +		error = inode_newsize_ok(inode, attr->ia_size);
> +		if (error)
> +			return error;
> +
> +		truncate_setsize(inode, attr->ia_size);

The inode_change_ok call here is superflous, it's already done by
inode_change_ok at the beginning of the function.  Even if that wasn't
done doing it aftet set_attr() would be too late anyway.

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