tc/BPF and XDP/BPF

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What is eBPF Reference: bpf
The extended Berkeley Packet Filter (eBPF) has first appeared in Kernel 3.18. The original version is being referred to “classic” BPF (cBPF) . cBPF is known to many as being the packet filter language used by tcpdump.
Nowadays, the Linux kernel runs eBPF only and loaded cBPF bytecode is transparently translated into an eBPF representation in the kernel before program execution.
The eBPF networking specific use including loading BPF programs with tc (traffic control) and XDP (eXpress Data Path).