Hi Daniel
On Wed, Jun 28, 2017 at 5:04 AM, Daniel Borkmann <daniel@xxxxxxxxxxxxx> wrote:
> On 06/28/2017 04:32 AM, MD I. Islam wrote:
>>
>> On Tue, Jun 27, 2017 at 10:05 PM, Y Song <ys114321@xxxxxxxxx> wrote:
>>>
>>> xdp meta data is different:
>>>
>>> struct xdp_md {
>>> __u32 data;
>>> __u32 data_end;
>>> };
>>>
>>> All other fields available for skb metadata won't be available in XDP.
>>> That is way
>>> you get verification failure.
>>
>>
>> Thanks for the quick reply! Now I'm trying xdp1_kern.c which uses
>> xdp_md. Now I'm getting the error:
>>
>> Note: 8 bytes struct bpf_elf_map fixup performed due to size mismatch!
>
>
> This one is harmless, just telling you that the native bpf_elf_map
> from iproute2 is different than the one you're loading, so it fixes
> up the remaining 8 bytes automatically.
>
>> RTNETLINK answers: Operation not supported
>
>
> This one seems likely that the driver you're trying to attach this to
> does not have XDP support. What's the driver you're using?
Yes, I was using RTL8111 driver which doesn't support XDP. I will
eventually use Netronome NIC which will hopefully work.
I'm facing the same problem in Mininet. Is there a way to use XDP in
Mininet? I am using Linux router in Mininet and I want to attach XDP
programs to virtual interfaces.
>
>
>> Could you please advise me what is wrong here?
>>
>>> On Tue, Jun 27, 2017 at 7:00 PM, MD I. Islam <tamim@xxxxxxxxxxx> wrote:
>>>>
>>>> Hi
>>>>
>>>> I'm using
>>>> http://lingrok.org/xref/linux-net-next/samples/bpf/parse_simple.c.
>>>>
>>>> I can load the program as tc_cls using following commands:
>>>>
>>>> sudo tc qdisc add dev eno1 clsact
>>>> sudo tc filter add dev eno1 ingress bpf da obj parse_simple.o sec
>>>> simple
>>>>
>>>> But I get error when I load the same program in XDP:
>>>>
>>>> sudo ip link set dev eno1 xdp obj parse_simple.o section simple
>>>>
>>>> Prog section 'simple' rejected: Permission denied (13)!
>>>> - Type: 6
>>>> - Instructions: 23 (0 over limit)
>>>> - License: GPL
>>>>
>>>> Verifier analysis:
>>>>
>>>> 0: (b7) r0 = 0
>>>> 1: (61) r2 = *(u32 *)(r1 +80)
>>>> invalid bpf_context access off=80 size=4
>>>>
>>>> Error fetching program/map!
>>>>
>>>> I made sure that the parse_simple.o have necessary permission. Could
>>>> you please advise what is wrong here? I'm using Kernel 4.11+. Does XDP
>>>> need any specific kernel configuration enabled? clang and LLVM
>>>> versions are as following:
>>>>
>>>> clang --version
>>>> clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
>>>> Target: x86_64-pc-linux-gnu
>>>>
>>>> llc --version
>>>> LLVM (http://llvm.org/):
>>>> LLVM version 3.8.0
>>>>
>>>> Optimized build.
>>>> Built Jul 9 2016 (11:22:59).
>>>> Default target: x86_64-pc-linux-gnu
>>>> Host CPU: haswell
>>>>
>>>> Registered Targets:
>>>> aarch64 - AArch64 (little endian)
>>>> aarch64_be - AArch64 (big endian)
>>>> amdgcn - AMD GCN GPUs
>>>> arm - ARM
>>>> arm64 - ARM64 (little endian)
>>>> armeb - ARM (big endian)
>>>> bpf - BPF (host endian)
>>>> bpfeb - BPF (big endian)
>>>> bpfel - BPF (little endian)
>>>> cpp - C++ backend
>>>> hexagon - Hexagon
>>>> mips - Mips
>>>> mips64 - Mips64 [experimental]
>>>> mips64el - Mips64el [experimental]
>>>> mipsel - Mipsel
>>>> msp430 - MSP430 [experimental]
>>>> nvptx - NVIDIA PTX 32-bit
>>>> nvptx64 - NVIDIA PTX 64-bit
>>>> ppc32 - PowerPC 32
>>>> ppc64 - PowerPC 64
>>>> ppc64le - PowerPC 64 LE
>>>> r600 - AMD GPUs HD2XXX-HD6XXX
>>>> sparc - Sparc
>>>> sparcel - Sparc LE
>>>> sparcv9 - Sparc V9
>>>> systemz - SystemZ
>>>> thumb - Thumb
>>>> thumbeb - Thumb (big endian)
>>>> x86 - 32-bit X86: Pentium-Pro and above
>>>> x86-64 - 64-bit X86: EM64T and AMD64
>>>> xcore - XCore
>>>>
>>>> Many thanks
>>>> Tamim
>>
>>
>> Thanks
>> Tamim
>>
>
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