eBPF toy code examples (running in kernel) to familiarize yourself
with syntax and features:

 - bpf_prog.c		-> Classifier examples with using maps
 - bpf_shared.c		-> Ingress/egress map sharing example
 - bpf_tailcall.c	-> Using tail call chains
 - bpf_cyclic.c		-> Simple cycle as tail calls
 - bpf_graft.c		-> Demo on altering runtime behaviour

User space code example:

 - bpf_agent.c		-> Counterpart to bpf_prog.c for user
                           space to transfer/read out map data
