#!/usr/bin/make -f
# -*- makefile -*-

# Uncomment this to turn on verbose mode.
#export DH_VERBOSE=1

# TODO: check for headers not being installed
BUILD_DIR=$(shell pwd)

include /usr/share/dpkg/default.mk
include debian/rules.d/env.mk
include debian/rules.d/${DEB_BUILD_ARCH}.mk

CHANGELOG_DATE:=$(shell dpkg-parsechangelog -SDate)
CHANGELOG_DATE_UTC_ISO := $(shell date -u -d '$(SOURCE_DATE)' +%Y-%m-%dT%H:%MZ)

PVE_KERNEL_PKG=pve-kernel-${KVNAME}
PVE_DEBUG_KERNEL_PKG=pve-kernel-${KVNAME}-dbgsym
PVE_HEADER_PKG=pve-headers-${KVNAME}
PVE_USR_HEADER_PKG=pve-kernel-libc-dev
LINUX_TOOLS_PKG=linux-tools-${KERNEL_MAJMIN}
KERNEL_SRC_COPY=${KERNEL_SRC}_tmp

# TODO: split for archs, move to files?
PVE_CONFIG_OPTS= \
-m INTEL_MEI_WDT \
-d CONFIG_SND_PCM_OSS \
-e CONFIG_TRANSPARENT_HUGEPAGE_MADVISE \
-d CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS \
-m CONFIG_CEPH_FS \
-m CONFIG_BLK_DEV_NBD \
-m CONFIG_BLK_DEV_RBD \
-m CONFIG_BLK_DEV_UBLK \
-d CONFIG_SND_PCSP \
-m CONFIG_BCACHE \
-m CONFIG_JFS_FS \
-m CONFIG_HFS_FS \
-m CONFIG_HFSPLUS_FS \
-e CIFS_SMB_DIRECT \
-e CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU \
-e CONFIG_BRIDGE \
-e CONFIG_BRIDGE_NETFILTER \
-e CONFIG_BLK_DEV_SD \
-e CONFIG_BLK_DEV_SR \
-e CONFIG_BLK_DEV_DM \
-m CONFIG_BLK_DEV_NVME \
-e CONFIG_NLS_ISO8859_1 \
-d CONFIG_INPUT_EVBUG \
-d CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND \
-d CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL \
-e CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE \
-e CONFIG_SYSFB_SIMPLEFB \
-e CONFIG_DRM_SIMPLEDRM \
-d CONFIG_MODULE_SIG \
-d CONFIG_MEMCG_DISABLED \
-e CONFIG_MEMCG_SWAP_ENABLED \
-e CONFIG_HYPERV \
-m CONFIG_VFIO_IOMMU_TYPE1 \
-m CONFIG_VFIO_VIRQFD \
-m CONFIG_VFIO \
-m CONFIG_VFIO_PCI \
-m CONFIG_USB_XHCI_HCD \
-m CONFIG_USB_XHCI_PCI \
-m CONFIG_USB_EHCI_HCD \
-m CONFIG_USB_EHCI_PCI \
-m CONFIG_USB_EHCI_HCD_PLATFORM \
-m CONFIG_USB_OHCI_HCD \
-m CONFIG_USB_OHCI_HCD_PCI \
-m CONFIG_USB_OHCI_HCD_PLATFORM \
-d CONFIG_USB_OHCI_HCD_SSB \
-m CONFIG_USB_UHCI_HCD \
-d CONFIG_USB_SL811_HCD_ISO \
-e CONFIG_MEMCG_KMEM \
-d CONFIG_DEFAULT_CFQ \
-e CONFIG_DEFAULT_DEADLINE \
-e CONFIG_MODVERSIONS \
-e CONFIG_ZSTD_COMPRESS \
-d CONFIG_DEFAULT_SECURITY_DAC \
-e CONFIG_DEFAULT_SECURITY_APPARMOR \
--set-str CONFIG_DEFAULT_SECURITY apparmor \
-e CONFIG_MODULE_ALLOW_BTF_MISMATCH \
-d CONFIG_UNWINDER_ORC \
-d CONFIG_UNWINDER_GUESS \
-e CONFIG_UNWINDER_FRAME_POINTER \
--set-str CONFIG_SYSTEM_TRUSTED_KEYS ""\
--set-str CONFIG_SYSTEM_REVOCATION_KEYS ""\
-d CONFIG_SECURITY_LOCKDOWN_LSM \
-d CONFIG_SECURITY_LOCKDOWN_LSM_EARLY \
--set-str CONFIG_LSM yama,integrity,apparmor \
-e CONFIG_PAGE_TABLE_ISOLATION

debian/control: $(wildcard debian/*.in)
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/pve-kernel.prerm.in > debian/${PVE_KERNEL_PKG}.prerm
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/pve-kernel.postrm.in > debian/${PVE_KERNEL_PKG}.postrm
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/pve-kernel.postinst.in > debian/${PVE_KERNEL_PKG}.postinst
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/pve-headers.postinst.in > debian/${PVE_HEADER_PKG}.postinst
	chmod +x debian/${PVE_KERNEL_PKG}.prerm
	chmod +x debian/${PVE_KERNEL_PKG}.postrm
	chmod +x debian/${PVE_KERNEL_PKG}.postinst
	chmod +x debian/${PVE_HEADER_PKG}.postinst
	sed -e 's/@KVNAME@/${KVNAME}/g' -e 's/@KVMAJMIN@/${KERNEL_MAJMIN}/g' < debian/control.in > debian/control

build: .compile_mark .tools_compile_mark .modules_compile_mark

install: .install_mark .tools_install_mark .headers_install_mark .usr_headers_install_mark
	dh_installdocs -A debian/copyright debian/SOURCE
	dh_installchangelogs
	dh_installman
	dh_strip_nondeterminism
	dh_compress
	dh_fixperms

binary: install
	debian/rules fwcheck abicheck
	dh_strip -N${PVE_HEADER_PKG} -N${PVE_USR_HEADER_PKG}
	dh_makeshlibs
	dh_shlibdeps
	dh_installdeb
	dh_gencontrol
	dh_md5sums
	dh_builddeb

.config_mark:
	cd ${KERNEL_SRC}; scripts/config ${PVE_CONFIG_OPTS}
	${MAKE} -C ${KERNEL_SRC} oldconfig
	# copy to allow building in parallel to kernel/module compilation without interference
	rm -rf ${KERNEL_SRC_COPY}
	cp -ar ${KERNEL_SRC} ${KERNEL_SRC_COPY}
	touch $@

.compile_mark: .config_mark
	${MAKE} -C ${KERNEL_SRC} KBUILD_BUILD_VERSION_TIMESTAMP="PVE ${DEB_VERSION} (${CHANGELOG_DATE_UTC_ISO})"
	touch $@

.install_mark: .compile_mark .modules_compile_mark
	rm -rf debian/${PVE_KERNEL_PKG}
	mkdir -p debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}
	mkdir debian/${PVE_KERNEL_PKG}/boot
	install -m 644 ${KERNEL_SRC}/.config debian/${PVE_KERNEL_PKG}/boot/config-${KVNAME}
	install -m 644 ${KERNEL_SRC}/System.map debian/${PVE_KERNEL_PKG}/boot/System.map-${KVNAME}
	install -m 644 ${KERNEL_SRC}/${KERNEL_IMAGE_PATH} debian/${PVE_KERNEL_PKG}/boot/${KERNEL_INSTALL_FILE}-${KVNAME}
	${MAKE} -C ${KERNEL_SRC} INSTALL_MOD_PATH=${BUILD_DIR}/debian/${PVE_KERNEL_PKG}/ modules_install
	# install zfs drivers
	install -d -m 0755 debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/zfs
	install -m 644 $(addprefix ${MODULES}/,zfs.ko zavl.ko znvpair.ko zunicode.ko zcommon.ko icp.ko zlua.ko spl.ko zzstd.ko) debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/zfs
	# remove firmware
	rm -rf debian/${PVE_KERNEL_PKG}/lib/firmware

ifeq ($(filter pkg.pve-kernel.debug,$(DEB_BUILD_PROFILES)),)
	echo "'pkg.pve-kernel.debug' build profile disabled, skipping -dbgsym creation"
else
	echo "'pkg.pve-kernel.debug' build profile enabled, creating -dbgsym contents"
	mkdir -p debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/lib/modules/${KVNAME}
	mkdir debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/boot
	install -m 644 ${KERNEL_SRC}/vmlinux debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/boot/vmlinux-${KVNAME}
	cp -r debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME} debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/lib/modules/
	rm -f debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/lib/modules/${KVNAME}/source
	rm -f debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/lib/modules/${KVNAME}/build
	rm -f debian/${PVE_DEBUG_KERNEL_PKG}/usr/lib/debug/lib/modules/${KVNAME}/modules.*
endif

	# strip debug info
	find debian/${PVE_KERNEL_PKG}/lib/modules -name \*.ko -print | while read f ; do strip --strip-debug "$$f"; done
	# finalize
	/sbin/depmod -b debian/${PVE_KERNEL_PKG}/ ${KVNAME}
	# Autogenerate blacklist for watchdog devices (see README)
	install -m 0755 -d debian/${PVE_KERNEL_PKG}/lib/modprobe.d
	ls debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/kernel/drivers/watchdog/ > watchdog-blacklist.tmp
	echo ipmi_watchdog.ko >> watchdog-blacklist.tmp
	cat watchdog-blacklist.tmp|sed -e 's/^/blacklist /' -e 's/.ko$$//'|sort -u > debian/${PVE_KERNEL_PKG}/lib/modprobe.d/blacklist_${PVE_KERNEL_PKG}.conf
	rm -f debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/source
	rm -f debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/build
	touch $@

.tools_compile_mark: .compile_mark
	${MAKE} -C ${KERNEL_SRC}/tools/perf prefix=/usr HAVE_NO_LIBBFD=1 HAVE_CPLUS_DEMANGLE_SUPPORT=1 NO_LIBPYTHON=1 NO_LIBPERL=1 NO_LIBCRYPTO=1 PYTHON=python3
	echo "checking GPL-2 only perf binary for library linkage with incompatible licenses.."
	! ldd ${KERNEL_SRC}/tools/perf/perf | grep -q -E '\blibbfd'
	! ldd ${KERNEL_SRC}/tools/perf/perf | grep -q -E '\blibcrypto'
	${MAKE} -C ${KERNEL_SRC}/tools/perf man
	touch $@

.tools_install_mark: .tools_compile_mark
	rm -rf debian/${LINUX_TOOLS_PKG}
	mkdir -p debian/${LINUX_TOOLS_PKG}/usr/bin
	mkdir -p debian/${LINUX_TOOLS_PKG}/usr/share/man/man1
	install -m 755 ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/perf debian/${LINUX_TOOLS_PKG}/usr/bin/perf_$(KERNEL_MAJMIN)
	for i in ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/Documentation/*.1; do \
	    fname="$${i##*/}"; manname="$${fname%.1}"; \
	    install -m644 "$$i" "debian/${LINUX_TOOLS_PKG}/usr/share/man/man1/$${manname}_$(KERNEL_MAJMIN).1"; \
	done
	touch $@

.headers_prepare_mark: .config_mark
	rm -rf debian/${PVE_HEADER_PKG}
	mkdir -p debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	install -m 0644 ${KERNEL_SRC}/.config debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	make -C ${KERNEL_SRC_COPY} mrproper
	cd ${KERNEL_SRC_COPY}; find . -path './debian/*' -prune \
	    -o -path './include/*' -prune \
	    -o -path './Documentation' -prune \
	    -o -path './scripts' -prune \
	    -o -type f \
	    \( \
	        -name 'Makefile*' \
	        -o -name 'Kconfig*' \
	        -o -name 'Kbuild*' \
	        -o -name '*.sh' \
	        -o -name '*.pl' \
	    \) \
	    -print | cpio -pd --preserve-modification-time ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	cd ${KERNEL_SRC_COPY}; \
	    ( \
	        find arch/${KERNEL_HEADER_ARCH} -name include -type d -print | \
	        xargs -n1 -i: find : -type f \
	    ) | \
	    cpio -pd --preserve-modification-time ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	touch $@

.headers_compile_mark: .headers_prepare_mark
	# set output to subdir of source to reduce number of hardcoded paths in output files
	rm -rf ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}
	mkdir -p ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}
	cp ${KERNEL_SRC}/.config ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}/.config
	${MAKE} -C ${KERNEL_SRC_COPY} O=${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG} -j1 syncconfig modules_prepare prepare scripts
	cd ${KERNEL_SRC_COPY}; cp -a include scripts ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	find ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG} -name \*.o.ur-\* -o -name '*.cmd' | xargs rm -f
	rsync --ignore-existing -r -v -a $(addprefix ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}/,arch include kernel scripts tools) ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/
	rm -rf ${BUILD_DIR}/${KERNEL_SRC_COPY}
	touch $@

.headers_install_mark: .compile_mark .modules_compile_mark .headers_compile_mark
	cp ${KERNEL_SRC}/include/generated/compile.h debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/include/generated/compile.h
	install -m 0644 ${KERNEL_SRC}/Module.symvers debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	mkdir -p debian/${PVE_HEADER_PKG}/lib/modules/${KVNAME}
	ln -sf /usr/src/linux-headers-${KVNAME} debian/${PVE_HEADER_PKG}/lib/modules/${KVNAME}/build
	touch $@

.usr_headers_install_mark: PKG_DIR = debian/${PVE_USR_HEADER_PKG}
.usr_headers_install_mark: OUT_DIR = ${PKG_DIR}/usr
.usr_headers_install_mark: .config_mark
	rm -rf '${PKG_DIR}'
	mkdir -p  '${PKG_DIR}'
	$(MAKE) -C ${KERNEL_SRC} headers_install ARCH=$(KERNEL_HEADER_ARCH) INSTALL_HDR_PATH='$(CURDIR)'/$(OUT_DIR)
	rm -rf $(OUT_DIR)/include/drm $(OUT_DIR)/include/scsi
	find $(OUT_DIR)/include \( -name .install -o -name ..install.cmd \) -execdir rm {} +

# Move include/asm to arch-specific directory
	mkdir -p $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)
	mv $(OUT_DIR)/include/asm $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
	test ! -d $(OUT_DIR)/include/arch || \
		mv $(OUT_DIR)/include/arch $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
	touch $@

.modules_compile_mark: ${MODULES}/zfs.ko
	touch $@

${MODULES}/zfs.ko: .compile_mark
	cd ${MODULES}/${ZFSDIR}; ./autogen.sh
	cd ${MODULES}/${ZFSDIR}; ./configure --with-config=kernel --with-linux=${BUILD_DIR}/${KERNEL_SRC} --with-linux-obj=${BUILD_DIR}/${KERNEL_SRC}
	${MAKE} -C ${MODULES}/${ZFSDIR}
	cp ${MODULES}/${ZFSDIR}/module/avl/zavl.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/nvpair/znvpair.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/unicode/zunicode.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zcommon/zcommon.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/icp/icp.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zfs/zfs.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/lua/zlua.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/spl/spl.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zstd/zzstd.ko ${MODULES}/

fwlist-${KVNAME}: .compile_mark .modules_compile_mark
	debian/scripts/find-firmware.pl debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME} >fwlist.tmp
	mv fwlist.tmp $@

.PHONY: fwcheck
fwcheck: fwlist-${KVNAME} fwlist-previous
	@echo "checking fwlist for changes since last built firmware package.."
	@echo "if this check fails, add fwlist-${KVNAME} to the pve-firmware repository and upload a new firmware package together with the ${KVNAME} kernel"
	sort fwlist-previous | uniq > fwlist-previous.sorted
	sort fwlist-${KVNAME} | uniq > fwlist-${KVNAME}.sorted
	diff -up -N fwlist-previous.sorted fwlist-${KVNAME}.sorted > fwlist.diff
	rm fwlist.diff fwlist-previous.sorted fwlist-${KVNAME}.sorted
	@echo "done, no need to rebuild pve-firmware"


abi-${KVNAME}: .compile_mark
	debian/scripts/abi-generate debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/Module.symvers abi-${KVNAME} ${KVNAME}

.PHONY: abicheck
abicheck: debian/scripts/abi-check abi-${KVNAME} abi-prev-* abi-blacklist
	debian/scripts/abi-check abi-${KVNAME} abi-prev-* ${SKIPABI}

.PHONY: clean