RFC: porting NetBSD fsdb enhancements to FreeBSD

[Maxim Konovalov]

On Tue, 23 May 2006, 00:19+0400, Maxim Konovalov wrote:

> Hi Matt,
>
> On Fri, 28 Oct 2005, 00:59-0400, 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 think it is a useful functionality.  Here is a patch based on NetBSD
> code for HEAD, should work for RELENG_5 and RELENG_6 also.
[ patch skipped ]

For the record: I committed this code to HEAD.

Here is another cookie for fsdb(8): show and set inode birth time.

http://people.freebsd.org/~maxim/diff/fsdb-btime.diff

-- 
Maxim Konovalov