Re: warning: Invalid hash for xattr (system.posix_acl_access) associated with [1070 1541 0x0 SD] after extending device

[Jeff Mahoney <jeffm@novell.com>]

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Jörg Spilker wrote:
| Hello,
|
| i recently extended a LVM device and also resized the reiserfs. Now i
find
| lots of messages like this in my log:
|
| Nov 17 04:08:59 lotus kernel: ReiserFS: dm-5: warning: Invalid hash
for xattr
| (system.posix_acl_access) associated with [1070 1541 0x0 SD]
| Nov 17 04:08:59 lotus kernel: ReiserFS: dm-5: warning: Invalid hash
for xattr
| (system.posix_acl_access) associated with [1070 1541 0x0 SD]
|
| they don't seem to cause any harm. reiserfsck doesn't report any
errors. Can i
| fix the problem without reformatting the whole device?
|
| Kernel is the original kernel from SuSE 9.2 (with all available patches
| 2.6.8-24.3) and the reiserfs tools coming with the distribution.
|
| Greetings, Jörg
|

It's definately fixable without reformatting.

When I designed the on-disk ACL/xattr format, I built in a magic number
and a checksum to catch things like corrupted entries wreaking havoc on
the system. That's what you're hitting.

Somehow, an entry wasn't fully written to disk or was corrupted somehow.
~ Whether it was part of the extending process or not, I couldn't tell you.

You can use debugreiserfs to track down the file with that key by using
debugreiserfs -d <device> and looking for the objectid. Once you find
the directory listing with that key, you should be able to find the file.

When you've located the filename, a setfattr -x system.posix_acl_access
<file> followed by the appropriate setfacl command will reset the ACL.

- -Jeff


- --
Jeff Mahoney
SuSE Labs
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