Use bpf get first key to iterate the maps
With the newest kernel support from upstream. We can directly get the
first key of each map with a null pointer instead of using a nonexistent
key for each map. This patch replaced all related iteration process with
this new function and cleaned up all unecessary code.
Bug: 30950746
Test: ./libbpfTest ./netd_unit_test
Change-Id: Ie1fd617964d37d2a1c12b2f34457c1cc1d912571
Merged-In: Ie1fd617964d37d2a1c12b2f34457c1cc1d912571
(cherry picked from aosp commit c3bfd3eeb7f9b3f42078f018603c161092c5d4e7)
6 files changed