Current File : //usr/src/veeamsnap-6.1.2.1781/genconfig.sh
#!/bin/bash -e
#
# Copyright (c) Veeam Software Group GmbH
#
# Generate config.h file with specific options for module
if [ -n "$1" ]
then
if [ "-" = "$1" ]
then
echo "kernel version is not set"
else
KERNEL_VERSION="$1"
fi
else
KERNEL_VERSION="$(uname -r)"
fi
if [ -n "$2" ]
then
OUTPUT_FILE="$2"
else
OUTPUT_FILE="$(dirname "$0")/config.h"
fi
if [ -n "$3" ]
then
if [ "-" = "$3" ]
then
echo "System map file is not set"
else
SYSTEM_MAP_FILE="$3"
fi
else
if [ -n "${KERNEL_VERSION}" ]
then
FILES=( "/lib/modules/${KERNEL_VERSION}/System.map" "/boot/System.map-${KERNEL_VERSION}" )
for FILE in ${FILES[@]}
do
if [ -f ${FILE} ]
then
HEADER=$(head -n 1 ${FILE} | awk '{print $1;}')
if [ "ffffffffffffffff" = "${HEADER}" ]
then
echo "Fake System.map was found in '${FILE}'"
continue
fi
echo "Real System.map was found in '${FILE}'"
SYSTEM_MAP_FILE=${FILE}
break
fi
done
fi
fi
echo "Generate \"${OUTPUT_FILE}\" for kernel \"${KERNEL_VERSION}\"."
echo "// Copyright (c) Veeam Software Group GmbH" > ${OUTPUT_FILE}
echo "#ifndef VEEAM_CONFIG" >> ${OUTPUT_FILE}
echo "#define VEEAM_CONFIG" >> ${OUTPUT_FILE}
if [[ -r /etc/os-release ]]
then
. /etc/os-release
echo "ID: " $ID
echo "VERSION_ID: " $VERSION_ID
DISTRIB_NAME=$(echo ${ID//[.-]/_} | awk '{print toupper($0)}')
echo "#ifndef DISTRIB_NAME_${DISTRIB_NAME}" >> ${OUTPUT_FILE}
echo "#define DISTRIB_NAME_${DISTRIB_NAME}" >> ${OUTPUT_FILE}
awk '{ n=split($0,v,"."); echo "n="n; for (i=0; ++i<=n;) print "#define DISTRIB_VERSION_"i" "v[i] }' <<< $VERSION_ID >> ${OUTPUT_FILE}
echo "#endif" >> ${OUTPUT_FILE}
else
echo "/etc/os-release file not found"
fi
# try to find kernel headers files
if [ -n "${KERNEL_VERSION}" ]
then
if [ -e "/lib/modules/${KERNEL_VERSION}/build/include/linux" ]
then
LINUX_INCLUDE="/lib/modules/${KERNEL_VERSION}/build/include/linux"
elif [ -e "/lib/modules/${KERNEL_VERSION}/source/include/linux" ]
then
LINUX_INCLUDE="/lib/modules/${KERNEL_VERSION}/source/include/linux"
fi
# try to find patch for lookup_bdev
# https://patchwork.kernel.org/patch/7748091/
if [ -n "${LINUX_INCLUDE}" ]
then
if [[ 0 -ne $(cat ${LINUX_INCLUDE}/fs.h | grep 'lookup_bdev' | grep -c 'mask' ) ]]
then
echo "#define LOOKUP_BDEV_MASK" >> ${OUTPUT_FILE}
fi
fi
fi
# parses the system map and check exported symbols
if [ -n "${SYSTEM_MAP_FILE}" ]
then
echo "System map \"${SYSTEM_MAP_FILE}\"."
SYMBOLS="blk_mq_make_request blk_alloc_queue_rh submit_bio_noacct"
for SYMBOL_NAME in ${SYMBOLS}
do
SYMBOL_ADDR=$(grep " __ksymtab_${SYMBOL_NAME}$" "${SYSTEM_MAP_FILE}" | awk '{print $1}')
if [ -z "${SYMBOL_ADDR}" ]
then
echo "Exported function \"${SYMBOL_NAME}\" not found"
else
MACRO_NAME="$(echo ${SYMBOL_NAME} | awk '{print toupper($0)}')_EXPORTED"
echo "#define ${MACRO_NAME}" >> ${OUTPUT_FILE}
echo "Exported function \"${SYMBOL_NAME}\" was found"
fi
done
# parses the system map and determines the addresses for some non-exported functions
KERNEL_ENTRY_BASE_NAME="__request_module"
KERNEL_ENTRY_BASE_ADDR=$(grep " ${KERNEL_ENTRY_BASE_NAME}$" "${SYSTEM_MAP_FILE}" | awk '{print $1}')
if [ -z "${KERNEL_ENTRY_BASE_ADDR}" ]
then
echo "Function \"${KERNEL_ENTRY_BASE_NAME}\" not found"
else
echo "#define KERNEL_ENTRY_BASE_ADDR 0x${KERNEL_ENTRY_BASE_ADDR}" >> ${OUTPUT_FILE}
echo "Address of the function \"${KERNEL_ENTRY_BASE_NAME}\" was defined"
fi
SYMBOLS="blk_mq_submit_bio"
for SYMBOL_NAME in ${SYMBOLS}
do
SYMBOL_ADDR=$(grep " ${SYMBOL_NAME}$" "${SYSTEM_MAP_FILE}" | awk '{print $1}')
if [ -z "${SYMBOL_ADDR}" ]
then
echo "Function \"${SYMBOL_NAME}\" not found"
else
MACRO_NAME="$(echo ${SYMBOL_NAME} | awk '{print toupper($0)}')_ADDR"
echo "#define ${MACRO_NAME} 0x${SYMBOL_ADDR}" >> ${OUTPUT_FILE}
echo "Address of the function \"${SYMBOL_NAME}\" was defined"
fi
done
fi
# the end of the config file
echo "#endif" >> ${OUTPUT_FILE}
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