Re: btrfs check: add_missing_dir_index: BUG_ON `ret` triggered, value -17

[Marc MERLIN <marc@merlins.org>]

On Fri, Nov 17, 2017 at 01:17:19PM +0800, Qu Wenruo wrote:
> 
> 
> On 2017年11月17日 10:26, Marc MERLIN wrote:
> > Howdy,
> > 
> > Up to date git pull from btrfs-progs:
> > 
> > gargamel:~# btrfs check --repair /dev/mapper/raid0d1
> > enabling repair mode
> > Checking filesystem on /dev/mapper/raid0d1
> > UUID: 01334b81-c0db-4e80-92e4-cac4da867651
> > checking extents
> > corrupt extent record: key 203003699200 168 40960
> > corrupt extent record: key 203003764736 168 172032
> > ref mismatch on [203003699200 40960] extent item 0, found 1
> > Data backref 203003699200 root 258 owner 1933897829 offset 0 num_refs 0 not found in extent tree
> > Incorrect local backref count on 203003699200 root 258 owner 1933897829 offset 0 found 1 wanted 0 back 0x5596988c2130
> > backpointer mismatch on [203003699200 40960]
> > repair deleting extent record: key 203003699200 168 40960
> > adding new data backref on 203003699200 root 258 owner 1933897829 offset 0 found 1
> > Repaired extent references for 203003699200
> > Data backref 203003764736 root 258 owner 1932315368 offset 0 num_refs 0 not found in extent tree
> > Incorrect local backref count on 203003764736 root 258 owner 1932315368 offset 0 found 1 wanted 0 back 0x5596dde358f0
> > backpointer mismatch on [203003764736 172032]
> > repair deleting extent record: key 203003764736 168 172032
> > adding new data backref on 203003764736 root 258 owner 1932315368 offset 0 found 1
> > Repaired extent references for 203003764736
> > Fixed 0 roots.
> > checking free space cache
> > cache and super generation don't match, space cache will be invalidated
> > checking fs roots
> > invalid location in dir item 0
> > Deleting bad dir index [1919785864,96,1958] root 258
> > Deleting bad dir index [1919785864,96,1957] root 258
> > repairing missing dir index item for inode 1919805647
> > cmds-check.c:2614: add_missing_dir_index: BUG_ON `ret` triggered, value -17
> 
> -EEXIST. Btrfs check --repair is trying to re-insert some key which
> exists already.
> 
> Would you please provide the output of "btrfs-debug-tree -t 258 | grep
> 1919805647" to help the debugging?
 
Sure. It may run all night and I'm going to bed now, but the output I
got so far, is:
gargamel:~# btrfs-debug-tree -t 258 /dev/mapper/raid0d1 | grep 1919805647
                location key (1919805647 INODE_ITEM 0) type FILE
        item 30 key (1919805647 INODE_ITEM 0) itemoff 14415 itemsize 160
        item 31 key (1919805647 INODE_REF 1919785864) itemoff 14389 itemsize 26
        item 32 key (1919805647 EXTENT_DATA 0) itemoff 14336 itemsize 53
(...)

I'll post tomorrow if I get more overnight

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901