libbpf: Added AttachXDP wrapper

[guyarb]

#171

[grantseltzer]

Hi @guyarb! My apologies for the delay in review, I was off all of last week. I'll be looking at this today.

[grantseltzer]

Are we sure that this is the correct link type?

[guyarb]

great catch! Added new link type XDP

[grantseltzer]

I manually tested this and of course it works great, thanks for submitting! Just a comment and a question. I'd like to have a selftest for this but because it'll require an external program it can get complicated, not going to ask that of you.

[guyarb]

I manually tested this and of course it works great, thanks for submitting! Just a comment and a question. I'd like to have a selftest for this but because it'll require an external program it can get complicated, not going to ask that of you.

I copied the selftest from tc and modified it accordingly
Ran it locally and it worked
If I made anything wrong in the selftest - please let me know!

[grantseltzer]

Thank you @guyarb !