[Bug 1645232] Re: e2fsprogs - could not preserve ACL permissions : The getxattr() returns with (EINVAL)

[Theodore Ts'o]

I've committed a complete fix to the master branch of the e2fsprogs git
tree.

One of the reasons why I don't want to commit a partial fix is because
the potential for corruption of production file systems by programs such
as fuse2fs was extremely high.   Users of mke2fs -d are generally
embedded developers.   Users of fuse2fs are more likely to be civilians.

We've had this bug for a long time, and no one has complained.   Taking
some time to have a fix that doesn't corrupt file systems is far more
important to me as the maintainer.   For any distribution, but
especially for Ubuntu, civilian users >>> embedded developers.

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https://bugs.launchpad.net/bugs/1645232

Title:
  e2fsprogs - could not preserve ACL permissions  : The getxattr()
  returns with (EINVAL)

Status in e2fsprogs package in Ubuntu:
  Confirmed

Bug description:
  The original installed e2fsprogs did not support mke2fs -d /directory
  " option . So ,  git cloned from e2fsprogs packages from repository
  and installed it and followed below steps to reproduce this :

  1. set the ACL rules as below to one of the binary :

      $ setfacl -m u:vipatil:r-- rootfs/usr/bin/helloworld
      $ getfacl rootfs/usr/bin/helloworld
      # file: rootfs/usr/bin/helloworld
      # owner: shkumar
      # group: hardev
      user::rwx
      user:vipatil:r--
      group::---
      mask::r--
      other::---

  2. $ dd if=/dev/zero of=test.ext4 bs=1M count=60

  3. $ mke2fs -t ext4 test.ext4 -d rootfs/
      mke2fs 1.43.3 (04-Sep-2016)
      Discarding device blocks: done
      Creating filesystem with 61440 1k blocks and 15360 inodes
      Filesystem UUID: 495713b3-5f1f-427a-8359-a736dfb2ece9
      Superblock backups stored on blocks:
          8193, 24577, 40961, 57345

  Allocating group tables: done
  Writing inode tables: done
  Creating journal (4096 blocks): done
  Copying files into the device: done
  Writing superblocks and filesystem accounting information: done

  4. sudo mount -o loop,acl,user_xattr,rw,sync test.ext4 mountpoint

  5.@/mountpoint$ getfacl usr/bin/helloworld
      getfacl: usr/bin/helloworld: Invalid argument

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