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#!/bin/sh -e
# SPDX-License-Identifier: BSD-3-Clause
# Copyright (c) 2024 Red Hat, Inc.
#
# Import and check Linux Kernel uAPI headers
#
base_url="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/include/uapi/"
base_path="kernel/linux/uapi/"
version=""
file=""
check_headers=0
errors=0
print_usage()
{
echo "Usage: $(basename $0) [-h] [-i FILE] [-u VERSION] [-c]"
echo "-i FILE import Linux header file. E.g. linux/vfio.h"
echo "-u VERSION update imported list of Linux headers to a given version. E.g. v6.10"
echo "-c check headers are valid"
}
version_older_than() {
printf '%s\n%s' "$1" "$2" | sort -C -V
}
download_header()
{
local header=$1
local path=$2
local url="${base_url}${header}?h=${version}"
if ! curl -s -f --create-dirs -o $path $url; then
echo "Failed to download $url"
return 1
fi
return 0
}
update_headers()
{
local header
local url
local path
echo "Updating to $version"
for filename in $(find $base_path -name "*.h" -type f); do
header=${filename#$base_path}
download_header $header $filename || return 1
done
return 0
}
import_header()
{
local include
local import
local header=$1
local path="${base_path}${header}"
download_header $header $path || return 1
for include in $(sed -ne 's/^#include <\(.*\)>$/\1/p' $path); do
if [ ! -f "${base_path}${include}" ]; then
read -p "Import $include (y/n): " import && [ "$import" = 'y' ] || continue
echo "Importing $include for $path"
import_header "$include" || return 1
fi
done
return 0
}
fixup_includes()
{
local path=$1
sed -i "s|^#include <linux/compiler.h>||g" $path
sed -i "s|\<__user[[:space:]]||" $path
# Prepend include path with "uapi/" if the header is imported
for include in $(sed -ne 's/^#include <\(.*\)>$/\1/p' $path); do
if [ -f "${base_path}${include}" ]; then
sed -i "s|${include}|uapi/${include}|g" $path
fi
done
}
check_header() {
echo -n "Checking $1... "
if ! diff -q $1 $2 >/dev/null; then
echo "KO"
diff -u $1 $2
return 1
else
echo "OK"
fi
return 0
}
while getopts i:u:ch opt ; do
case ${opt} in
i ) file=$OPTARG ;;
u ) version=$OPTARG ;;
c ) check_headers=1 ;;
h ) print_usage ; exit 0 ;;
? ) print_usage ; exit 1 ;;
esac
done
shift $(($OPTIND - 1))
if [ $# -ne 0 ]; then
print_usage
exit 1
fi
cd $(dirname $0)/..
current_version=$(< ${base_path}/version)
if [ -n "${version}" ]; then
if version_older_than "$version" "$current_version"; then
echo "Headers already up to date ($current_version >= $version)"
version=$current_version
else
update_headers || exit 1
fi
else
echo "Version not specified, using current version ($current_version)"
version=$current_version
fi
if [ -n "${file}" ]; then
import_header $file || exit 1
fi
for filename in $(find $base_path -name "*.h" -type f); do
fixup_includes $filename || exit 1
done
echo $version > ${base_path}/version
if [ $check_headers -eq 0 ]; then
exit 0
fi
tmpheader="$(mktemp -t dpdk.checkuapi.XXXXXX)"
trap "rm -f '$tmpheader'" INT
echo "Checking imported headers for version ${version}"
for filename in $(find $base_path -name "*.h" -type f); do
header=${filename#$base_path}
download_header $header $tmpheader || exit 1
fixup_includes $tmpheader || exit 1
check_header $filename $tmpheader || errors=$((errors+1))
done
echo "$errors error(s) found"
rm -f $tmpheader
trap - INT
exit $errors
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