RFC: porting NetBSD fsdb enhancements to FreeBSD

[Robert Watson]

On Fri, 28 Oct 2005, Matt Emmerton wrote:

> Recently I've had to do some low-level surgery on some disks that have 
> gone bad in order to recover some of the data. This has required me to 
> zero out blocks on disk, patch up the affected files, and pull the data 
> off the disks.
>
> I was toying around the with fsdb tool, but couldn't figure out a way to 
> map blocks to inodes (although the 'blocks' command does the mapping in 
> the other direction quite nicely.)
>
> Poking around I found that someone has added this functionality (via a 
> "findblk" command) to NetBSD's fsdb (back in 2003!), which I have 
> grafted onto a 4.x box here with relative ease.
>
> NetBSD Mailing List Posting: 
> http://groups.google.com/group/mailing.netbsd.tech.userlevel/browse_thread/thread/18acceb04cf5aadb/2a891d67edf9279%232a891d67edf9279?sa=X&oi=groupsr&start=0&num=3) 
> NetBSD CVS: 
> http://cvsweb.netbsd.org/bsdweb.cgi/src/sbin/fsdb/fsdb.c.diff?r1=1.24&r2=1.25&f=h
>
> Is this something that folks would like to see on FreeBSD?  I've got 
> RELENG_5_4 and RELENG_6_0 boxes here in my office so I can whip up the 
> patches and do some testing in short order.

I'm sure if you submit a patch in a PR, we can find someone willing to get 
it committed.

Robert N M Watson