bpf network stats - move double accounting tag!=0 out of bpf
Instead of also accounting tag!=0 traffic against tag==0 slot,
while the bpf code writes into the map, move this logic into
the userspace jni code which reads from the map.
Simplifies the bpf program making things easier on the
kernel's bpf verifier, and is better for performance,
since a per-packet fixup operation becomes a per-poll fixup.
Test: TreeHugger, atest libnetworkstats_test FrameworksNetTests
Bug: 276296921
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ic220a201781a1170bcffe327fe5664fc12b65dd9
3 files changed
