This issue is to be used as a collection of all discussions regarding disabling
the compilation of f2fs in various opensuse distributions. Currently this
filesystem received only sporadic CVE-related backports. In the process of
doing said backports I have also identified several drawbacks which make it
rather hard to support and provide sensible experience: 

1. There are a bunch of validation checks which are not being backported since
they are not linked to a particular CVE as such the stability of the filesystem
is questionable even with CVE backports. 

2. Currently the filesystem doesn't have a way to disable mounting of
filesystems created with newer kernels, containing on-disk incompatible
changes. I have talked with one of the maintainers and they recognize this fact
but so far no one is working on this. This is a pretty major since newer images
could potentially crash older kernels not being able to properly parse them. 

3. All in all this leads me to believe that f2fs requires a rather controller
environment in terms of kernel/tools versions so is not a good candidate to be
included in a community-based distribution kernel.

I've already spoken to release manager for leap/tumbleweed and they are fine
with disabling it.