xfs_db 2.9.8: coredump

[Justin Piszcz]

On Fri, 26 Dec 2008, Eric Sandeen wrote:

> Justin Piszcz wrote:
>> # xfs_db -V
>> xfs_db version 2.9.8
>>
>> p34:~# xfs_db -c frag -f /dev/sda1
>> Segmentation fault (core dumped)
>> p34:~# xfs_db -c frag -r /dev/sda1
>> Segmentation fault (core dumped)
>>
>> (It was working BEFORE I ran xfs_fsr on it, it was at 16% fragmentation).
>>
>> Now it can no longer check it?
>>
>
> Or, get an xfs_metadump of the fs and see if db segfaults on that too.
>
> I'd be curious  to know if xfs_repair -n flaggs any problems, as well.
>
> -Eric
>

# xfs_metadump -g /dev/sda1  /root/sda1.metadump
Copied 300096 of 426176 inodes (0 of 12 AGs)
Copying log
#

p34:~# xfs_db -c frag -f sda1.metadump
xfs_db: unexpected XFS SB magic number 0x5846534d
xfs_db: read failed: Invalid argument
xfs_db: data size check failed
cache_node_purge: refcount was 1, not zero (node=0x1ce4b80)
xfs_db: cannot read root inode (22)
cache_node_purge: refcount was 1, not zero (node=0x1ce4cd0)
xfs_db: cannot read realtime bitmap inode (22)
Segmentation fault (core dumped)
p34:~#

p34:~# xfs_repair -n /dev/sda1
Phase 1 - find and verify superblock...
Phase 2 - using internal log
         - scan filesystem freespace and inode maps...
         - found root inode chunk
Phase 3 - for each AG...
         - scan (but don't clear) agi unlinked lists...
         - process known inodes and perform inode discovery...
         - agno = 0
         - agno = 1
         - agno = 2
         - agno = 3
         - agno = 4
         - agno = 5
         - agno = 6
         - agno = 7
         - agno = 8
         - agno = 9
         - agno = 10
         - agno = 11
         - process newly discovered inodes...
Phase 4 - check for duplicate blocks...
         - setting up duplicate extent list...
         - check for inodes claiming duplicate blocks...
         - agno = 0
         - agno = 2
         - agno = 1
         - agno = 3
         - agno = 4
         - agno = 5
         - agno = 6
         - agno = 7
         - agno = 8
         - agno = 9
         - agno = 10
         - agno = 11
No modify flag set, skipping phase 5
Phase 6 - check inode connectivity...
         - traversing filesystem ...
         - traversal finished ...
         - moving disconnected inodes to lost+found ...
Phase 7 - verify link counts...
No modify flag set, skipping filesystem flush and exiting.
p34:~#

Again, unmount / remount, no issues.

p34:~# umount /r1
p34:~# mount -a ; dmesg | tail -n 2
[264025.739788] XFS mounting filesystem sda1
[264025.836900] Ending clean XFS mount for filesystem: sda1
p34:~#

But xfs_db dies, on the metadump file as well.