check_kernel.py

#!/usr/bin/env python
import os


REQUIRED = {
  "CONFIG_BPF": "y",
  "CONFIG_BPF_SYSCALL": "y"
}

OPTIONAL = {
  'tc filters': {
    'CONFIG_NET_CLS_BPF': 'm'
  },
  'tc actions': {
    'CONFIG_BPF_JIT': 'y',
    'CONFIG_HAVE_BPF_JIT': 'y',
    'CONFIG_NET_ACT_BPF': 'm'
  },
  'kprobes': {
    'CONFIG_BPF_EVENTS': 'y'
  },
  "networking examples": {
    'CONFIG_NET_ACT_GACT': 'm',
    'CONFIG_NET_ACT_POLICE': 'm',
    'CONFIG_NET_SCH_SFQ': 'm',
    'CONFIG_DUMMY': 'm',
    'CONFIG_VXLAN': 'm'
  }
}

config = os.path.join('/boot', 'config-{}'.format(os.uname().release))

with open(config) as f:
  data = f.read().splitlines()
  data = dict(tuple(i.split("=")) for i in data if "=" in i)
  for k, v in REQUIRED.items():
    if data[k] != v:
      print('{} needs to be {}, not {}'.format(k, v, data[k]))
  for feature, config in OPTIONAL.items():
    for k, v in config.items():
      if data[k] != v:
        print('{} needs to be {}, not {}, {} may not work'.format(k, v, data[k], feature))