#!/bin/sh

# Report missing kernel features

#

# Usage: ./check_kernel_features.sh [PATH_TO_KERNEL_CONFIG]

set -e

set -u

err=0

config=''

# Find kernel config

for c in "$@" "/boot/config-$(uname -r)" "/boot/config" "/proc/config.gz"; do

if [ -r "$c" ]; then

config="$c"

break

fi

done

if [ -z "$config" ]; then

echo "Could not find kernel config, please supply it as argument." >&2

exit 1

fi

# Check feature

check_opt() {

if ! zgrep -qE "^${1}[[:space:]]*=[[:space:]]*[y|Y]" "$config"; then

err=1

echo "Required option ${1} not set" >&2

fi

}

check_opt 'CONFIG_BPF'

check_opt 'CONFIG_BPF_EVENTS'

check_opt 'CONFIG_BPF_JIT'

check_opt 'CONFIG_BPF_SYSCALL'

check_opt 'CONFIG_FTRACE_SYSCALLS'

check_opt 'CONFIG_HAVE_EBPF_JIT'

check_opt 'CONFIG_FUNCTION_TRACER'

check_opt 'CONFIG_HAVE_DYNAMIC_FTRACE'

check_opt 'CONFIG_DYNAMIC_FTRACE'

check_opt 'CONFIG_HAVE_KPROBES'

check_opt 'CONFIG_KPROBES'

check_opt 'CONFIG_KPROBE_EVENTS'

check_opt 'CONFIG_ARCH_SUPPORTS_UPROBES'

check_opt 'CONFIG_UPROBES'

check_opt 'CONFIG_UPROBE_EVENTS'

check_opt 'CONFIG_DEBUG_FS'

# Status report

if [ $err -eq 0 ]; then

echo "All required features present!"

else

echo "Missing required features"

fi

exit $err