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cmake_minimum_required(VERSION 3.10)
# set the project name
project(xloop-kernel-modules
LANGUAGES C)
# include macros to define Linux kernel build targets
include(Kernel)
# set C flags for a Linux kernel module
set(KERNEL_C_FLAGS "-DCONFIG_BLK_DEV_XLOOP_MIN_COUNT=${BLK_DEV_XLOOP_MIN_COUNT} -DXLOOP_MAJOR=${XLOOP_MAJOR} -DXLOOP_CTRL_MINOR=${XLOOP_CTRL_MINOR} -I ${PROJECT_INCLUDE_GEN_DIR}"
CACHE STRING "C flags to be used for building the kernel module")
# set C flags for the debug mode of a Linux kernel module
set(KERNEL_C_FLAGS_DEBUG "-g -DDEBUG"
CACHE STRING "Additional C flags to be used for building the kernel module in debug mode")
# append include directories to the C flags
get_property(KERNEL_INCLUDE_DIRS DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES)
foreach(KERNEL_INCLUDE_DIR ${KERNEL_INCLUDE_DIRS})
set(KERNEL_C_FLAGS "${KERNEL_C_FLAGS} -I ${KERNEL_INCLUDE_DIR}")
endforeach(KERNEL_INCLUDE_DIR ${KERNEL_INCLUDE_DIRS})
# append debug C flags if debug mode is enabled
if(CMAKE_BUILD_TYPE MATCHES "Debug")
set(KERNEL_C_FLAGS "${KERNEL_C_FLAGS} ${KERNEL_C_FLAGS_DEBUG}")
endif(CMAKE_BUILD_TYPE MATCHES "Debug")
# define list of options to ignore with the checkpatch.pl linter
set(CHECKPATCH_IGNORE_WARNINGS "LINUX_VERSION_CODE"
"CONSTANT_COMPARISON"
"PREFER_PR_LEVEL"
"TRAILING_SEMICOLON"
"CONSIDER_KSTRTO"
"UNNECESSARY_ELSE"
"SPLIT_STRING"
"STATIC_CONST_CHAR_ARRAY"
"UNSPECIFIED_INT"
"ENOSYS")
file(GLOB XLOOP_MAIN_VERSION_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/xloop_main_*.h)
file(GLOB XLOOP_MAIN_VERSION_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_main_*.c)
# xloop main Linux kernel module
set(KERNEL_MODULE_XLOOP_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt.c
${CMAKE_CURRENT_SOURCE_DIR}/xloop_main.c
${XLOOP_MAIN_VERSION_SOURCES})
set(KERNEL_MODULE_XLOOP_HEADER_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_main.h
${XLOOP_MAIN_VERSION_HEADERS}
${CMAKE_CURRENT_SOURCE_DIR}/uapi_xloop.h)
add_kernel_module(xloop "${KERNEL_BUILD_DIR}"
"${KERNEL_INSTALL_DIR}"
"CONFIG_BLK_DEV_XLOOP=m"
"${KERNEL_MODULE_XLOOP_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_HEADER_FILES}"
${CMAKE_CURRENT_SOURCE_DIR}/Kbuild)
# add dependency to generate project version header before xloop.ko is built
add_dependencies(xloop xloop-generate-version)
add_kernel_linter(xloop-lint "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_HEADER_FILES}")
add_kernel_linter_fix(xloop-lint-fix "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_HEADER_FILES}")
add_linter_fix(xloop-lint-fix-clang "${KERNEL_MODULE_XLOOP_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_HEADER_FILES}")
# xloop_file_fmt_raw Linux kernel module
set(KERNEL_MODULE_XLOOP_RAW_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_raw.c)
set(KERNEL_MODULE_XLOOP_RAW_HEADER_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_main.h
${XLOOP_MAIN_VERSION_HEADERS}
${CMAKE_CURRENT_SOURCE_DIR}/uapi_xloop.h)
add_kernel_module(xloop_file_fmt_raw "${KERNEL_BUILD_DIR}"
"${KERNEL_INSTALL_DIR}"
"CONFIG_BLK_DEV_XLOOP_FILE_FMT_RAW=m"
"${KERNEL_MODULE_XLOOP_RAW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_RAW_HEADER_FILES}"
${CMAKE_CURRENT_SOURCE_DIR}/Kbuild
xloop)
# add dependency to generate project version header before xloop_file_fmt_raw.ko is built
add_dependencies(xloop_file_fmt_raw xloop-generate-version)
add_kernel_linter(xloop_file_fmt_raw-lint "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_RAW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_RAW_HEADER_FILES}")
add_kernel_linter_fix(xloop_file_fmt_raw-lint-fix "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_RAW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_RAW_HEADER_FILES}")
add_linter_fix(xloop_file_fmt_raw-lint-fix-clang "${KERNEL_MODULE_XLOOP_RAW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_RAW_HEADER_FILES}")
# xloop_file_fmt_qcow Linux kernel module
set(KERNEL_MODULE_XLOOP_QCOW_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_cache.c
${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_cluster.c
${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_main.c)
set(KERNEL_MODULE_XLOOP_QCOW_HEADER_FILES ${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_cache.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_cluster.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt_qcow_main.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_file_fmt.h
${CMAKE_CURRENT_SOURCE_DIR}/xloop_main.h
${XLOOP_MAIN_VERSION_HEADERS}
${CMAKE_CURRENT_SOURCE_DIR}/uapi_xloop.h)
add_kernel_module(xloop_file_fmt_qcow "${KERNEL_BUILD_DIR}"
"${KERNEL_INSTALL_DIR}"
"CONFIG_BLK_DEV_XLOOP_FILE_FMT_QCOW=m"
"${KERNEL_MODULE_XLOOP_QCOW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_QCOW_HEADER_FILES}"
${CMAKE_CURRENT_SOURCE_DIR}/Kbuild
xloop)
# add dependency to generate project version header before xloop_file_fmt_qcow.ko is built
add_dependencies(xloop_file_fmt_qcow xloop-generate-version)
add_kernel_linter(xloop_file_fmt_qcow-lint "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_QCOW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_QCOW_HEADER_FILES}")
add_kernel_linter_fix(xloop_file_fmt_qcow-lint-fix "${CHECKPATCH_IGNORE_WARNINGS}"
"${KERNEL_MODULE_XLOOP_QCOW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_QCOW_HEADER_FILES}")
add_linter_fix(xloop_file_fmt_qcow-lint-fix-clang "${KERNEL_MODULE_XLOOP_QCOW_SOURCE_FILES}"
"${KERNEL_MODULE_XLOOP_QCOW_HEADER_FILES}")
if(CMAKE_BUILD_TYPE MATCHES "Debug")
add_subdirectory(tests)
endif(CMAKE_BUILD_TYPE MATCHES "Debug")
# install udev rules for xloop devices exposed by the xloop kernel module
install(PROGRAMS ${CMAKE_CURRENT_SOURCE_DIR}/udev/50-xloop.rules
DESTINATION /lib/udev/rules.d
PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
COMPONENT kernel)
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