https://bugzilla.redhat.com/show_bug.cgi?id=1470157 To cut a long story short, we were using libext2fs to create filesystems where short symlinks (< 60 bytes) were stored the same way as long symlinks, ie. stored as an ordinary file instead of being stored in the inode. This actually worked fine until very recently when this change was made to the upstream kernel: commit 407cd7fb83c0ebabb490190e673d8c71ee7df97e Author: Tahsin Erdogan <tahsin@xxxxxxxxxx> Date: Tue Jul 4 00:11:21 2017 -0400 ext4: change fast symlink test to not rely on i_blocks which broke these filesystems. I think the reason we were creating filesystems wrongly in the first place is because our code has been around since about 2008, and the nice ext2fs_symlink function that deals properly with fast/slow symlinks wasn't added until 2013. It's not too much trouble for us to recreate the incorrect filesystems. Mostly we're creating one-off throwaway filesystems for appliances anyway and they don't live for long. But I suppose this might be a warning that other incorrect filesystems exist which will break with Linux >= 4.13. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v
