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Date: Tue, 07 Mar 2006 23:41:37 -0800
To: Doug Hardie <bc979@lafn.org>, stable@freebsd.org
From: Glenn Dawson <glenn@antimatter.net>
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Subject: Re: Inode Usage
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At 07:11 PM 3/7/2006, Doug Hardie wrote:
>I am building a tool to identify the file that has a specific LBA.
>The approach I am using is to search through each inode from number 2
>up.  This approach works well with UFS1 file systems as then
>preinitialize all the inodes.  However, UFS2 does lazy inode
>initialization so there are always some that are basically garbage.
>I have not found any relaiable way to determine from the inode
>contents if it is in use or not.  I suspect that information is in
>the inode bit map.  However, I haven't found any way to access that.
>Nothing in ffs.h seems to fit the need.  Is there a way to tell if
>inode x is initialized or in use?

I believe there are macros for that in sys/ufs/ffs/fs.h.
Also, the source for dumpfs probably has good examples of how to use them.

-Glenn

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