tree 11851b2ad0f8574a87a6fa76cd9113ded2c0c155
parent 4845288a6e42e13b1bb8063923b24371c9e93397
author Chenbo Feng <fengc@google.com> 1544559863 -0800
committer Chenbo Feng <fengc@google.com> 1550180345 -0800

Add detailed kernel version when checking bpf support

For devices with 4.14 kernel shipping with bpf feature, they support more
functionality compared to 4.9 kernels. So when checking if the device
supports a given bpf feature, return a bpf level dependent on the detailed
kernel version instead of a simple boolean. This information would be
useful when we support new features such as map_in_map and cgroup socket
filters.

Bug: 111441138
Test: libnetdbpf_test, netd_integration_test
Change-Id: Ib51a56a35643ad76b58987ba1938c69905d28141