Eelco Chaudron <echaudro@xxxxxxxxxx> writes:
> Currently when you want to attach a trace program to a bpf program
> the section name needs to match the tracepoint/function semantics.
>
> However the addition of the bpf_program__set_attach_target() API
> allows you to specify the tracepoint/function dynamically.
>
> The call flow would look something like this:
>
> xdp_fd = bpf_prog_get_fd_by_id(id);
> trace_obj = bpf_object__open_file("func.o", NULL);
> prog = bpf_object__find_program_by_title(trace_obj,
> "fentry/myfunc");
> bpf_program__set_attach_target(prog, xdp_fd,
> "fentry/xdpfilt_blk_all");
I think it would be better to have the attach type as a separate arg
instead of encoding it in the function name. I.e., rather:
bpf_program__set_attach_target(prog, xdp_fd,
"xdpfilt_blk_all", BPF_TRACE_FENTRY);
-Toke
