Re: Filesystem "somewhat" destroyed - need help for recovery/fixing

[Josef Bacik <jbacik@fusionio.com>]

On Mon, Jun 17, 2013 at 09:08:26PM +0000, Alexander Skwar wrote:
> Hello
> 
> I think, I somewhat destroyed my btrfs filesystem on my Ubuntu 13.04 kernel 
> 3.8.0-25-lowlatency system. It got destroyed, because the system was hanging 
> for some other reason and I had to remove power...
> 
> When I try to mount my filesystem (there's only one, with a few 
> subfilesystems), the system crashes. Also btrfsck dies; always like this:
> 
> a@ask-home:~$ sudo /btrfs-progs.dev/bin/btrfsck /dev/ssd/Data 
> parent transid verify failed on 33327525888 wanted 53973 found 53972
> parent transid verify failed on 33327525888 wanted 53973 found 53972
> Ignoring transid failure
> Checking filesystem on /dev/ssd/Data
> UUID: 7d2eb10f-aced-4d41-bb7f-7badbf075b6a
> checking extents
> checking fs roots
> root 325 inode 31590 errors 400
> extent buffer leak: start 33327525888 len 4096
> *** Error in `btrfs check': corrupted double-linked list: 0x00000000007a2600 
> ***
> 
> a@ask-home:~$ /btrfs-progs.dev/bin/btrfs version
> Btrfs v0.20-rc1-253-g7854c8b-dirty
> 
> btrfsck always dies with a corrupted double-linked list.
> 
> When the system crashes when I try to mount the filesystem, I get a kernel 
> oop. Nothing in syslog, though - too fast :/ On 
> http://wir.myds.me/photo/photo_thumb.php?
> dir=53637265656e73686f74732f4372617368206d6f756e74206274726673 or 
> http://imgur.com/a/UA7fF I tried to capute a few photos of the crash 
> message. "Screenshots", of sorts...
> 
> I was able to recover most of the files with btrfs-recover. But not all of 
> it correctly - at least one VirtualBox image is now broken.
> 
> Well - what do I do now? Could someone help, please?
> 

Pull down my tree

git://github.com/josefbacik/btrfs-progs.git

and build and run the fsck in there and see if it's a bit more friendly.
Thanks,

Josef