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

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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:

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.

The underlying filesystem is:

merkaba:~> grep /home /proc/mounts
/dev/mapper/merkaba-home /home ext4 
rw,noatime,user_xattr,acl,barrier=1,stripe=128,data=ordered 0 0
/home/.ms /home/ms ecryptfs 
rw,relatime,ecryptfs_fnek_sig=[…],ecryptfs_sig=[…],ecryptfs_cipher=aes,ecryptfs_key_bytes=32,ecryptfs_xattr_metadata,ecryptfs_unlink_sigs 
0 0

Kernel is:

ms@merkaba:~> cat /proc/version
Linux version 3.2.0-rc4-amd64 (Debian 3.2~rc4-1~experimental.1) 
(ben@xxxxxxxxxxxxxxx) (gcc version 4.6.2 (Debian 4.6.2-5) ) #1 SMP Sun Dec 4 
18:38:24 UTC 2011


With encfs or from my local workstation via NFS there is no such issue.

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