From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: Access content of file via inodes
Date: Tue, 5 Apr 2005 08:22:17 +0100
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On Tue, Apr 05, 2005 at 09:23:19AM +0800, Kathy KN wrote:
> Good day all,
> 
> How do I access/read the content of the files via using inodes
> or blocks that belong to the inode, at sys_link and vfs_link layer?
> I used bmap to access the blocks that belongs to the inodes, but
> getting access to the buffer_head's b_data doesn't seem to help.

You don't.  There might not even be any blocks.