Re: btrfs check --repair couldn't solve problem with btrfs partition

[Qu Wenruo <quwenruo@cn.fujitsu.com>]

>
> Hi!
>
> Several times I try repair my btrfs partition with follow commands:
> [root@localhost ~]# umount /home
>
> root@localhost ~]# btrfs check --repair /dev/sdb1
> enabling repair mode
> Fixed 0 roots.
> Checking filesystem on /dev/sdb1
> UUID: 82df2d84-bf54-46cb-84ba-c88e93677948
> checking extents
> checking free space cache
> cache and super generation don't match, space cache will be invalidated
> checking fs roots
> root 5 inode 14121739 errors 2000, link count wrong
> unresolved ref dir 12843363 index 36917 namelen 11 name Preferences
> filetype 0 errors 3, no dir item, no dir index
> root 5 inode 14121759 errors 2000, link count wrong
> unresolved ref dir 139955 index 340700 namelen 18 name
> session_state.xspf filetype 0 errors 3, no dir item, no dir index
> found 2897923331138 bytes used err is 1
The problem seems not hard to repair in btrfs-progs.

But I'm also curious about why this happens.
Is there any ungraceful shutdown or things like that?

Also, would you mind sending us the btrfs-image dump?
btrfs-debug-tree output would also help, although it may be bigger than
output of btrfs-image.

Thanks,
Qu
> total csum bytes: 3100962412
> total tree bytes: 4638130176
> total fs tree bytes: 950992896
> total extent tree bytes: 142475264
> btree space waste bytes: 608962027
> file data blocks allocated: 33183423946752
>   referenced 3177308782592
>
> Btrfs v3.17
>
>
> # rpm -q btrfs-progs
> btrfs-progs-3.17-1.fc21.x86_64
>
>
> And every time I see this messages.
>
>
>
> --
> Best Regards,
> Mike Gavrilov.
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