[PATCH bpf v2 0/2] bpf: Fix l3 to l2 use of bpf_skb_change_head

[Jussi Maki <joamaki@xxxxxxxxx>]

This fixes an issue with using bpf_skb_change_head to redirect
packet from l3 to l2 device. See commit messages for details.

v1->v2:
- Port the test case to the newly refactored prog_tests/tc_redirect.c.