tc, bpf: finalize eBPF support for cls and act front-end
This work finalizes both eBPF front-ends for the classifier and action
part in tc, it allows for custom ELF section selection, a simplified tc
command frontend (while keeping compat), reusing of common maps between
classifier and actions residing in the same object file, and exporting
of all map fds to an eBPF agent for handing off further control in user
space.
It also adds an extensive example of how eBPF can be used, and a minimal
self-contained example agent that dumps map data. The example is well
documented and hopefully provides a good starting point into programming
cls_bpf and act_bpf.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
diff --git a/README.iproute2+tc b/README.iproute2+tc
index 6aa5d18..2a5638d 100644
--- a/README.iproute2+tc
+++ b/README.iproute2+tc
@@ -72,12 +72,16 @@
etc. The same thing can be made with rules.
I still did not test ipchains, but they should work too.
+
+Setup and code example of BPF classifier and action can be found under
+examples/bpf/, which should explain everything for getting started.
+
+
Setup of rsvp and u32 classifiers is more hairy.
If you read RSVP specs, you will understand how rsvp classifier
works easily. What's about u32... That's example:
-
#! /bin/sh
TC=/home/root/tc