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Building

right now building bpfink with eBPF is a multi step process.

Run the following commands to package eBPF for each kernel major.minor version in the future we may support JIT similar to how BCC works.

eBPF

The recommended way of building eBPF library is using docker. Run following commands in root of this repository:

docker build --tag bpfink-library-build:dev . 
docker run -v "$(pwd):/workspace" bpfink-library-build:dev

This will regenerate vfs-<kernel-version>.o files in pkg/ebpf/ directory using current state of code in pkg/ebpf/vfs.c.

If you need to build another version of the kernel, alter Dockerfile to install appropriate version of kernel-devel package and add its number to scripts/build.sh.

Locally

  • LLVM
  • clang
  • kernel-devel

Generally speaking if you install bcc and bcc works you should be able to compile bpflink See how to install bcc

In the future we may add a build pipeline to build a different version of the BPF program.

cd bpfink

cd /workspace/pkg/ebpf

make -r -C "." -e KERNEL_RELEASE=<kernel_version>

The list of supported kernel versions can be found by running the following command inside the container.

ls /usr/src/kernels/

add the updated ELF files to the repo, and push to your branch.