As I mentioned in my FOSDEM talk the current DPDK eBPF handling is not usable for packet filters. I have ported the classic BPF to eBPF code and the generated code is not usable by DPDK.
The problem is that DPDK eBPF does not implement all the opcodes. BPF_ABS is not implemented and must be. It is in the Linux kernel. PCAP filter string: ip dst fosdem.org cBPF program (6 insns): L0: 28 00 00 00 0c 00 00 00 ldh [12] L1: 15 00 00 03 00 08 00 00 jeq #0x800, L2, L5 L2: 20 00 00 00 1e 00 00 00 ld [30] L3: 15 00 00 01 8c 16 16 1f jeq #0x1f16168c, L4, L5 L4: 06 00 00 00 ff ff ff ff ret #0xffffffff L5: 06 00 00 00 00 00 00 00 ret #0x0 eBPF program (11 insns): L0: af 00 00 00 00 00 00 00 xor r0, r0 L1: af 77 00 00 00 00 00 00 xor r7, r7 L2: bf 16 00 00 00 00 00 00 mov r6, r1 L3: 28 70 00 00 0c 00 00 00 ldh r0, [12] L4: 55 00 04 00 00 08 00 00 jne r0, #0x800, L9 L5: 20 70 00 00 1e 00 00 00 ldw r0, [30] L6: 55 00 02 00 8c 16 16 1f jne r0, #0x1f16168c, L9 L7: b4 00 00 00 01 00 00 00 mov32 r0, #0x1 L8: 95 00 00 00 00 00 00 00 exit L9: b4 00 00 00 02 00 00 00 mov32 r0, #0x2 L10: 95 00 00 00 00 00 00 00 exit validate: invalid opcode at pc: 3 validate: invalid opcode at pc: 5 rte_bpf_load failed: Invalid argument
