linux-ext4 - Re: [PATCH] Validate extent details only when read from the disk

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Message-ID: <20090209104857.GE31884@skywalker>
Date:	Mon, 9 Feb 2009 16:18:57 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Thiemo Nagel <thiemo.nagel@...tum.de>
Cc:	tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] Validate extent details only when read from the disk

On Mon, Feb 09, 2009 at 11:31:46AM +0100, Thiemo Nagel wrote:
> Aneesh Kumar K.V wrote:
> > Make sure we validate extent details only when read from the disk.
> >
> > @@ -602,15 +607,13 @@ struct ext4_ext_path *
> >  ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
> >  					struct ext4_ext_path *path)
> >  {
> > +	int need_to_validate = 0;
> >  	struct ext4_extent_header *eh;
> >  	struct buffer_head *bh;
> >  	short int depth, i, ppos = 0, alloc = 0;
> >  
> >  	eh = ext_inode_hdr(inode);
> >  	depth = ext_depth(inode);
> > -	if (ext4_ext_check(inode, eh, depth))
> > -		return ERR_PTR(-EIO);
> > -
> 

I am doing the check in ext4_iget while reading the inode from disk.

-aneesh
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