Kenny Ho <y2kenny@xxxxxxxxx> writes: > Hi, > > From https://www.collabora.com/news-and-blog/blog/2019/04/15/an-ebpf-overview-part-2-machine-and-bytecode/ > "The BPF-accesible kernel "helper" functions are defined by the kernel > core (not extensible through modules) via an API similar to defining > syscalls" > > Has there been interest/discussion around having helper functions from > kernel modules? Going through the code, I am guessing one of the > obstacles is to have the verifier checking against helper functions > that may or may not be available but I am not an expert of the > subsystem. What are the current opinions on having helper functions > from kernel modules? The support for calling kernel functions directly (AKA "unstable helpers") will likely be the way this will be achievable. See the comment in brackets half-way down in the description here: https://lore.kernel.org/bpf/20210325015142.1544736-1-kafai@xxxxxx/ -Toke
