ebpf

Is your feature request related to a problem? Please describe.

I fiddled around with bpftrace to write internal documentation for my colleagues on how to use it. I chose tracepoint:syscalls:sys_enter_mkdir as a suitable tracepoint for a simple demo, and wrote this code:

bpftrace -e 'tracepoint:syscalls:sys_enter_mkdir { printf("mkdir %s %o\n", str(args->pathname), args->mode); }

Non-standard non-BTF map definitions can be loaded since cilium/ebpf#362, so this can technically be enabled.

Some extra glue might be needed for parsing the extra bytes, but worth it to get extra test coverage IMO.

At the moment of writing this issue, kubectl trace only supports X86-64 as target architecture.

The tool should be able to schedule bpftrace programs against all the architectures supported by bpftrace, that are X86-64 and arm64 (aarch64) see the Cmake definition.

To achieve that we n

Currently we have just one type of docs which are "reference" documentation. We should add a "how-to/tutorials" section with goal-driven content. We can start by drawing already available content:

https://blog.aquasec.com/kubernetes-runtime-security-ebpf
https://blog.aquasec.com/tracee-runtime-malware-alerts-aqua-postee
https://blog.aquasec.com/runtime-security-tracee-rules
https://github.co

It appears that the RedBPF toolchain imposes currently undocumented restrictions on map value types that go beyond those expressed by the generic constraints:

• All variants of an enum must have the same size in memory.
• Struct fields are (mostly?) required to be aligned to multiples of 32 bits, though sometimes 64-bit alignment is required, and some structs don't work at all despite their fi

Since the kernel's libbpf seems to handle .text ELF sections gracefully, we should probably do that too.

Can we get some performance comparison between polycube and using standard linux facilities (NAT, iptables, etc.)?

CPU usage, PPS, latencies, etc.

Tasks:

• Explain current structure for system tests
• How to add new test?
• How to check coverage?
• How to integrate newly added test in the overall system test so that it can run as part of CI/GH-action?

Expected Output:

• document explaining above with sample test