User space tool to extract ext3 inode information

[Andreas Dilger]

On Apr 16, 2007  11:17 -0700, Aravindan Raghuveer wrote:
> I need to write a user space tool that can dump
> logical block addresses used by every file in a ext3
> file system. For example, if file foo uses LBAs 2,3
> and file bar uses LBAs 100,102,156, then the ouptut
> should read:
> 
> FILENAME    LBAs 
> foo         2, 3
> bar         100,102,156
> 
> Is there a tool that exists that can do this? If not,
> what would be a good strategy to write this tool. I am
> learning filesystem programming and would really
> appreciate any pointers.

"debugfs -c -R 'stat /path/to/file' /dev/XXX" reports, among other things
the blocks used by that file.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.