Describe the problem/challenge you have
For PVCs with millions of small files, relabeling them takes an enormous amount of time

Describe the solution you'd like
Kubernetes tries to address this as described here: https://kubernetes.io/blog/2023/04/18/kubernetes-1-27-efficient-selinux-relabeling-beta/
but zfs-localpv would need to support mounting with SeLinux mount options, and the CSI driver would need to advertise that