Re: ecryptfs_write_metadata: Error writing metadata out to lower file; rc = [-13]

[Martin Steigerwald <ms@teamix.de>]

Am Dienstag, 20. Dezember 2011 schrieb Alexis Hafner:
> Le 20 déc. 2011 à 02:06, Tyler Hicks <tyhicks@canonical.com> a écrit :
> > On 2011-12-19 13:26:19, Martin Steigerwald wrote:
> >> Hi!
> >> 
> >> Today I tested again whether ecryptfs would be suitable to replace encfs
> >> on my
> > 
> >> laptop. But I found several problems. The blocking one is:
> > Sorry, hopefully we can get them straightened out.
> > 
> >> ms@merkaba:~/Training/TXS-svn/Linux_15_Performance_Tuning#2> LANG=C make
> >> […]
> >> sed: couldn't open temporary file ./sedhqlAcd: Permission denied
> >> […]
> >> 
> >> ms@merkaba:~/Training/TXS-svn/Linux_15_Performance_Tuning> LANG=C ls -l
> >> | tail -6
> >> ls: cannot access sedhqlAcd: No such file or directory
> >> ls: cannot access sedChky0a: No such file or directory
> >> ls: cannot access sed1eW8Ek: No such file or directory
> >> ls: cannot access sedEjR2oA: No such file or directory
> >> ls: cannot access sedb4JEiI: No such file or directory
> >> ls: cannot access sedy0KQnt: No such file or directory
> >> -?????????  ? ?  ?            ?            ? sedChky0a
> >> -?????????  ? ?  ?            ?            ? sedEjR2oA
> >> ----------  1 ms teamix 1143445 Dec  5 10:01 sedNL1bTk
> >> -?????????  ? ?  ?            ?            ? sedb4JEiI
> >> -?????????  ? ?  ?            ?            ? sedhqlAcd
> >> -?????????  ? ?  ?            ?            ? sedy0KQnt
> >> 
> >> 
> >> Output in dmesg is:
> >> 
> >> ms@merkaba:~/Training/TXS-svn/Linux_15_Performance_Tuning> sudo tail -2
> >> /var/log/syslog
> >> Dec 19 13:23:30 merkaba kernel: [50999.570071] ecryptfs_write_metadata:
> >> Error writing metadata out to lower file; rc = [-13]
> >> Dec 19 13:23:30 merkaba kernel: [50999.570083] Error writing headers; rc
> >> = [-13]
> >> 
> >> 
> >> Ecryptfs is configured as follows:
> >> 
> >> merkaba:~> cat .ecryptfsrc
> >> ecryptfs_unlink_sigs
> >> ecryptfs_sig=[…]
> >> ecryptfs_fnek_sig=[…]
> >> ecryptfs_xattr
> >> ecryptfs_key_bytes=32
> >> ecryptfs_cipher=aes
> >> ecryptfs_passthrough=n
> >> 
> >> I am using extended attributes to avoid the space waste of 8 KiB per
> >> file.
> > 
> > I must warn you that the ecryptfs_xattr_metadata option is rarely used
> > by anyone and gets little testing from me upstream. I understand the
> > desire to save some space, but you should also consider stability here.
> > I'm working to automate some of that testing soon, so there is hope that
> > things could get better in this area.
[…]
> I can report the same bug on a 64-bits Rhel server 6.2 machine running
> the default Red Hat kernel, also with ext4 as the lower file-system :
> using extended attributes fails with the same error logs. This could
> indicate that the problem is not limited to the last development
> kernels, but has been here a little longer.

Can you also reproduce the rsync copies twice issue I reported in the other 
thread? Does the bug disappear when storing metadata in files instead.

Would be nice to have confirmation for that as well.

Thanks,
-- 
Martin Steigerwald - teamix GmbH - http://www.teamix.de
gpg: 19E3 8D42 896F D004 08AC A0CA 1E10 C593 0399 AE90