Re: Packet forwarding in XDP

Anmol Panda <anmol07.visitor@xxxxxxxxxxxxxx> · Tue, 14 Nov 2017 12:27:32 +0530

On 14.11.2017 12:07, David Miller wrote:

From: Anmol Panda <anmol07.visitor@xxxxxxxxxxxxxx>
Date: Tue, 14 Nov 2017 12:03:23 +0530

No bpf syscall, kernel headers too old?

Please enable CONFIG_BPF_SYSCALL in your kernel config.

Hello David,

   Thank you for your response. We have downloaded the latest stable 

version of the Linux kernel (4.13.12) and we compiled it with these 

flags enabled as per the directions here: 

http://cilium.readthedocs.io/en/stable/bpf/  .

CONFIG_CGROUP_BPF=y
CONFIG_BPF=y
CONFIG_BPF_SYSCALL=y
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_CLS_BPF=m
CONFIG_NET_CLS_ACT=y
CONFIG_BPF_JIT=y
CONFIG_LWTUNNEL_BPF=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_BPF_EVENTS=y
CONFIG_TEST_BPF=m

   We also enabled bpf_jit_enable and after the new kernel installation, 

we verified the setup using the ./test_verifier script int eh 

tools/testing/selftests/bpf/ folder and the all 506 tests were passed. 

When we tried the xdp1 program in the sample/tests/ we got the error:

No bpf syscall, kernel headers too old?

   Is there anything we are missing here? Please guide us.

Thank you,
Sincerely,