#!/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

MAKEFLAGS += $(subst parallel=,-j,$(filter parallel=%,${DEB_BUILD_OPTIONS}))

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

PMX_KERNEL_PKG=proxmox-kernel-$(KVNAME)
PMX_KERNEL_SERIES_PKG=proxmox-kernel-$(KERNEL_MAJMIN)
PMX_DEBUG_KERNEL_PKG=proxmox-kernel-$(KVNAME)-dbgsym
PMX_HEADER_PKG=proxmox-headers-$(KVNAME)
PMX_USR_HEADER_PKG=proxmox-kernel-libc-dev
LINUX_TOOLS_PKG=linux-tools-$(KERNEL_MAJMIN)
KERNEL_SRC_COPY=$(KERNEL_SRC)_tmp

# TODO: split for archs, move to files?
PMX_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 \
-e CONFIG_MODULE_SIG \
-e CONFIG_MODULE_SIG_ALL \
-e CONFIG_MODULE_SIG_FORMAT \
--set-str CONFIG_MODULE_SIG_HASH sha512 \
--set-str CONFIG_MODULE_SIG_KEY certs/signing_key.pem \
-e CONFIG_MODULE_SIG_KEY_TYPE_RSA \
-e CONFIG_MODULE_SIG_SHA512 \
-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 ""\
-e CONFIG_SECURITY_LOCKDOWN_LSM \
-e CONFIG_SECURITY_LOCKDOWN_LSM_EARLY \
--set-str CONFIG_LSM lockdown,yama,integrity,apparmor \
-e CONFIG_PAGE_TABLE_ISOLATION \
-e CONFIG_ARCH_HAS_CPU_FINALIZE_INIT \
-d CONFIG_GDS_FORCE_MITIGATION \
-d UBSAN_BOUNDS \

debian/control: $(wildcard debian/*.in)
	sed -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-kernel.prerm.in > debian/$(PMX_KERNEL_PKG).prerm
	sed -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-kernel.postrm.in > debian/$(PMX_KERNEL_PKG).postrm
	sed -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-kernel.postinst.in > debian/$(PMX_KERNEL_PKG).postinst
	sed -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-headers.postinst.in > debian/$(PMX_HEADER_PKG).postinst
	sed -e 's/@@KVMAJMIN@@/$(KERNEL_MAJMIN)/g' -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-kernel-meta.postrm.in > debian/$(PMX_KERNEL_SERIES_PKG).postrm
	sed -e 's/@@KVMAJMIN@@/$(KERNEL_MAJMIN)/g' -e 's/@@KVNAME@@/$(KVNAME)/g' < debian/proxmox-kernel-meta.postinst.in > debian/$(PMX_KERNEL_SERIES_PKG).postinst
	chmod +x debian/$(PMX_KERNEL_PKG).prerm
	chmod +x debian/$(PMX_KERNEL_PKG).postrm
	chmod +x debian/$(PMX_KERNEL_PKG).postinst
	chmod +x debian/$(PMX_KERNEL_SERIES_PKG).postrm
	chmod +x debian/$(PMX_KERNEL_SERIES_PKG).postinst
	chmod +x debian/$(PMX_HEADER_PKG).postinst
	sed -e 's/@KVNAME@/$(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$(PMX_HEADER_PKG) -N$(PMX_USR_HEADER_PKG)
	dh_makeshlibs
	dh_shlibdeps
	dh_installdeb
	dh_gencontrol
	dh_md5sums
	dh_builddeb

.config_mark:
	cd $(KERNEL_SRC); scripts/config $(PMX_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="PMX $(DEB_VERSION) ($(CHANGELOG_DATE_UTC_ISO))"
	touch $@

.install_mark: .compile_mark .modules_compile_mark
	rm -rf debian/$(PMX_KERNEL_PKG)
	mkdir -p debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)
	mkdir debian/$(PMX_KERNEL_PKG)/boot
	install -m 644 $(KERNEL_SRC)/.config debian/$(PMX_KERNEL_PKG)/boot/config-$(KVNAME)
	install -m 644 $(KERNEL_SRC)/System.map debian/$(PMX_KERNEL_PKG)/boot/System.map-$(KVNAME)
	install -m 644 $(KERNEL_SRC)/$(KERNEL_IMAGE_PATH) debian/$(PMX_KERNEL_PKG)/boot/$(KERNEL_INSTALL_FILE)-$(KVNAME)
	$(MAKE) -C $(KERNEL_SRC) INSTALL_MOD_PATH=$(BUILD_DIR)/debian/$(PMX_KERNEL_PKG)/ modules_install
	# install zfs drivers
	install -d -m 0755 debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)/zfs
	install -m 644 $(MODULES)/zfs.ko $(MODULES)/spl.ko debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)/zfs
	# remove firmware
	rm -rf debian/$(PMX_KERNEL_PKG)/lib/firmware

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

	# strip debug info
	find debian/$(PMX_KERNEL_PKG)/lib/modules -name \*.ko -print | while read f ; do strip --strip-debug "$$f"; done

	# sign modules using ephemeral, embedded key
	if grep -q CONFIG_MODULE_SIG=y ubuntu-kernel/.config ; then \
		find debian/$(PMX_KERNEL_PKG)/lib/modules -name \*.ko -print | while read f ; do \
			./ubuntu-kernel/scripts/sign-file sha512 ./ubuntu-kernel/certs/signing_key.pem ubuntu-kernel/certs/signing_key.x509 "$$f" ; \
		done; \
		rm ./ubuntu-kernel/certs/signing_key.pem ; \
	fi
	# finalize
	/sbin/depmod -b debian/$(PMX_KERNEL_PKG)/ $(KVNAME)
	# Autogenerate blacklist for watchdog devices (see README)
	install -m 0755 -d debian/$(PMX_KERNEL_PKG)/lib/modprobe.d
	ls debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)/kernel/drivers/watchdog/ > watchdog-blacklist.tmp
	echo ipmi_watchdog.ko >> watchdog-blacklist.tmp
	cat watchdog-blacklist.tmp|sed -e 's/^/blacklist /' -e 's/.ko$$//'|sort -u > debian/$(PMX_KERNEL_PKG)/lib/modprobe.d/blacklist_$(PMX_KERNEL_PKG).conf
	rm -f debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)/source
	rm -f debian/$(PMX_KERNEL_PKG)/lib/modules/$(KVNAME)/build
	touch $@

.tools_compile_mark: .compile_mark
	$(MAKE) -C $(KERNEL_SRC)/tools/perf prefix=/usr NO_LIBTRACEEVENT=1 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 NO_LIBTRACEEVENT=1 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/$(PMX_HEADER_PKG)
	mkdir -p debian/$(PMX_HEADER_PKG)/usr/src/linux-headers-$(KVNAME)
	install -m 0644 $(KERNEL_SRC)/.config debian/$(PMX_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 $(BUILD_DIR)/debian/$(PMX_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 $(BUILD_DIR)/debian/$(PMX_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)/$(PMX_HEADER_PKG)
	mkdir -p $(BUILD_DIR)/$(KERNEL_SRC_COPY)/$(PMX_HEADER_PKG)
	cp $(KERNEL_SRC)/.config $(BUILD_DIR)/$(KERNEL_SRC_COPY)/$(PMX_HEADER_PKG)/.config
	$(MAKE) -C $(KERNEL_SRC_COPY) O=$(BUILD_DIR)/$(KERNEL_SRC_COPY)/$(PMX_HEADER_PKG) -j1 syncconfig modules_prepare prepare scripts
	cd $(KERNEL_SRC_COPY); cp -a include scripts $(BUILD_DIR)/debian/$(PMX_HEADER_PKG)/usr/src/linux-headers-$(KVNAME)
	find $(BUILD_DIR)/$(KERNEL_SRC_COPY)/$(PMX_HEADER_PKG) -name \*.o.ur-\* -o -name '*.cmd' | xargs rm -f
	rsync --ignore-existing -r -v -a $(addprefix $(BUILD_DIR)/$(KERNEL_SRC_COPY)/$(PMX_HEADER_PKG)/,arch include kernel scripts tools) $(BUILD_DIR)/debian/$(PMX_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 $(KERNEL_SRC)/include/generated/compile.h debian/$(PMX_HEADER_PKG)/usr/src/linux-headers-$(KVNAME)/include/generated/compile.h
	install -m 0644 $(KERNEL_SRC)/Module.symvers debian/$(PMX_HEADER_PKG)/usr/src/linux-headers-$(KVNAME)
	mkdir -p debian/$(PMX_HEADER_PKG)/lib/modules/$(KVNAME)
	ln -sf /usr/src/linux-headers-$(KVNAME) debian/$(PMX_HEADER_PKG)/lib/modules/$(KVNAME)/build
	touch $@

.usr_headers_install_mark: PKG_DIR = debian/$(PMX_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/zfs.ko $(MODULES)/
	cp $(MODULES)/$(ZFSDIR)/module/spl.ko $(MODULES)/

fwlist-$(KVNAME): .compile_mark .modules_compile_mark
	debian/scripts/find-firmware.pl debian/$(PMX_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-$(KVNAME): .compile_mark
	debian/scripts/abi-generate debian/$(PMX_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