4 messages in org.freebsd.freebsd-hackersRFC: porting NetBSD fsdb enhancements...| From | Sent On | Attachments |
|---|---|---|
| Matt Emmerton | Oct 27, 2005 9:59 pm | |
| Robert Watson | Oct 28, 2005 2:50 am | |
| Maxim Konovalov | May 22, 2006 8:19 pm | |
| Maxim Konovalov | Jun 4, 2006 4:00 am |
| Subject: | RFC: porting NetBSD fsdb enhancements to FreeBSD | |
|---|---|---|
| From: | Maxim Konovalov (max...@macomnet.ru) | |
| Date: | Jun 4, 2006 4:00:56 am | |
| List: | org.freebsd.freebsd-hackers | |
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