@baltic +1 At least a warning **should** be issued when offering to encrypt the home folder, clarifying what the length limits are with and without that encryption. The limit is not **at all** hard to hit, I hope a solution will be implemented.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/344878 Title: file name too long when creating new file (ecryptfs_lookup: lookup_one_len() returned [-36] on lower_dentry) Status in eCryptfs: Fix Released Status in ecryptfs-utils package in Ubuntu: Invalid Status in linux package in Ubuntu: Fix Released Status in ecryptfs-utils source package in Natty: Won't Fix Status in linux source package in Natty: Won't Fix Status in ecryptfs-utils source package in Oneiric: Won't Fix Status in linux source package in Oneiric: Won't Fix Status in ecryptfs-utils source package in Precise: Invalid Status in linux source package in Precise: Fix Released Bug description: === IMPORTANT: eCryptfs can only store filenames of up to 143 characters when filename encryption is enabled. The remaining 112 characters are used for storing metadata such as the encrypted filename prefix, the signature of the filename encryption key, and an identifier for the cipher used, as well as random bytes to make /foo/file and /bar/file encrypt to different ciphertext and padding bytes to achieve proper cipher block size alignment. This bug is considered 'fixed' by the upstream maintainers. The eCryptfs kernel error message has been reduced to a debug level log message and eCryptfs now correctly reports its maximum supported filename length through the statfs() syscall. This is all that can be done without implementing a completely new encrypted filename design. A design that allows 255 character filenames without introducing other design limitations has not been identified and no one is currently working to come up with such a design. Please do not add comments or create new bugs saying that mv reports 'File name too long' or that you can't create a long filename in your eCryptfs mounts. It is an unfortunate design limitation that cannot be avoided at this time. Please do create new bugs when an application generates filenames that are too long to be stored in an eCryptfs mount. The application may be able to use the statfs() syscall to check the filename length limits of eCryptfs. Note that this does not include something like a torrent or ftp client trying to download a file with a long filename. The application is not generating the filename in those cases, it is just downloading the file that the user told it to download. === When trying to create a new file with a relatively long filename (f. ex. dfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqb.txt) I get an error: file name to long, when in fact the file name is not to long, but the encrypted name created for this file is to long, so, the file was not created. this is no problem when I try to create a file, but when I'm copying a lot of files to my home folder I get some: filename to long error's and it's hard to fix (first locate the file, create shorter name, move again) so, maybe you could create a check for to long filenames? I'm using ext4 here... mv dfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqb.txt /home/jens/ mv: cannot stat `/home/jens/dfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqbdfkmqsdgjfmqsldjfmlsqkjlqkdmfsmgjlqlskdqshgpoizehmlqkbgmlqbgmqb.txt': File name too long libecryptfs0: Installed: 71-0ubuntu2 Candidate: 71-0ubuntu2 Version table: *** 71-0ubuntu2 0 500 http://be.archive.ubuntu.com jaunty/main Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ecryptfs/+bug/344878/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
