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

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

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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?

Thanks,
Qu

> btrfs(+0x52207)[0x55966a6fa207]
> btrfs(+0x5225a)[0x55966a6fa25a]
> btrfs(+0x5cef3)[0x55966a704ef3]
> btrfs(cmd_check+0x2e10)[0x55966a70ea35]
> btrfs(main+0x85)[0x55966a6b9dc3]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7f794aadf2b1]
> btrfs(_start+0x2a)[0x55966a6b993a]
> Aborted
> 


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