commit 3feb78228230a60ba515fa681ce76b4ea27cc36f
author Hungming Chen <nuccachen@google.com> Tue May 11 21:07:18 2021 +0800
committer Hungming Chen <nuccachen@google.com> Wed May 12 19:57:18 2021 +0800
tree 80029450bb66caf48291e6fdc983825a901e9877
parent 2422319cb7437ae3e0283f5cb0014ad479171a3a

bpf: Add interface index to BPF devmap

Add upstream and downstream interface index to BPF map and rename the
BPF map name from xdp_devmap to dev.

$ adb shell dumpsys tethering
    Device map:
      ifindex (iface) -> ifindex (iface)
        21 (21) -> 21 (21)
        25 (25) -> 25 (25)
        12 (rmnet_data2) -> 12 (rmnet_data2)

$ adb shell ip addr
12: rmnet_data2 ..
21: wlan1 ..
25: rndis0 ..

$ adb shell ls /sys/fs/bpf/tethering
map_offload_tether_dev_map

Test: atest TetheringCoverageTests

Change-Id: Ic49965f3374d9e196ee672ec2f0e9e08f3847deb