A new helper library for network filesystems, called netfslib, was the subject
of a filesystem session at the
2022 Linux Storage,
Filesystem, Memory-management and BPF Summit (LSFMM). David Howells
developed
netfslib, which was merged for 5.13 a year ago, and led the session.
Some filesystems, like AFS and Ceph, are already using some of the services
that netfslib provides, while others are starting to look into it.

Source: LWN.net – [$] The netfslib helper library