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[Bug 1349020] Re: inline_data option on ext4 truncates symlinks


** Branch linked: lp:ubuntu/precise-proposed/linux-lts-trusty

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  inline_data option on ext4 truncates symlinks

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  To replicate the bug, create two filesystems, one with `mkfs.ext4 -I
  256`, one with `mkfs.ext4 -I 256 -O inline_data`. An inode size of 256
  bytes is the default, but included here for clarity. To do this, you
  are going to need an `e2fsprogs` from trunk, or version 1.43 if it has
  been released.

  Mount the two filesystems, in each of them do:
      $ ln -s $(for i in {1..64}; do echo -n .; done) 64
      $ ln -s $(for i in {1..128}; do echo -n .; done) 128
      $ ln -s $(for i in {1..192}; do echo -n .; done) 192
      $ ls -l 64 128 192

  Both directory listings will show symlinks named `64`, `128` and
  `256`, each pointing to a filename with the corresponding amount of
  dots. This is the expected behavior.

  Unmount both filesystems, mount them again. Do the `ls -l` again.

  The default filesystem will show the same output as previously, the
  one with inline_data activated will show the `128` symlink pointing to
  a filename of only 64 dots.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
   /dev/snd/controlC0:  clacke     3532 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sun Jul 27 00:47:06 2014
  EcryptfsInUse: Yes
  MachineType: LENOVO IdeaPad Z370
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/hostname-trusty_root ro quiet splash vt.handoff=7
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/29/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 4ACN35WW
  dmi.board.name: KL5
  dmi.board.vendor: LENOVO
  dmi.board.version: Rev 1.0
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Rev 1.0
  dmi.modalias: dmi:bvnLENOVO:bvr4ACN35WW:bd08/29/2011:svnLENOVO:pnIdeaPadZ370:pvrRev1.0:rvnLENOVO:rnKL5:rvrRev1.0:cvnLENOVO:ct10:cvrRev1.0:
  dmi.product.name: IdeaPad Z370
  dmi.product.version: Rev 1.0
  dmi.sys.vendor: LENOVO

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