###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2007-2017  IPFire Team <info@ipfire.org>                      #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

###############################################################################
# Definitions
###############################################################################

include Config

VER         = 4.9.16
RPI_PATCHES = 3.14.79-grsec-ipfire1
A7M_PATCHES = 3.14.79-grsec-ipfire1
GRS_PATCHES = grsecurity-3.1-4.9.16-201703180820.patch.xz


THISAPP    = linux-$(VER)
DL_FILE    = linux-$(VER).tar.xz
DL_FROM    = $(URL_IPFIRE)
DIR_APP    = $(DIR_SRC)/$(THISAPP)
CFLAGS     =
CXXFLAGS   =

PAK_VER    = 73
DEPS	   = ""

KERNEL_ARCH = $(MACHINE)

ifeq "$(MACHINE)" "i586"
	KERNEL_ARCH = i386
endif

VERSUFIX=ipfire$(KCFG)

ifeq "$(TOOLS)" "1"
	TARGET = $(DIR_INFO)/linux-$(VER)-$(VERSUFIX)-tools
	HEADERS_PREFIX = /tools
else
	TARGET = $(DIR_INFO)/linux-$(VER)-$(VERSUFIX)
	HEADERS_PREFIX = /usr
endif

ifeq "$(MACHINE_TYPE)" "arm"
	HEADERS_ARCH=arm
else
	HEADERS_ARCH=x86
endif

ifeq "$(KCFG)" ""
LASTKERNEL=1
endif
ifeq "$(KCFG)" "-kirkwood"
LASTKERNEL=1
endif

###############################################################################
# Top-level Rules
###############################################################################
objects =$(DL_FILE) \
	rpi-patches-$(RPI_PATCHES).patch.xz \
	arm7-multi-patches-$(A7M_PATCHES).patch.xz \
	$(GRS_PATCHES)


$(DL_FILE)					= $(URL_IPFIRE)/$(DL_FILE)
rpi-patches-$(RPI_PATCHES).patch.xz		= $(URL_IPFIRE)/rpi-patches-$(RPI_PATCHES).patch.xz
arm7-multi-patches-$(A7M_PATCHES).patch.xz	= $(URL_IPFIRE)/arm7-multi-patches-$(A7M_PATCHES).patch.xz
$(GRS_PATCHES)					= $(URL_IPFIRE)/$(GRS_PATCHES)

$(DL_FILE)_MD5					= f006558ef9fdcc5d5b46b047d5c710f9
rpi-patches-$(RPI_PATCHES).patch.xz_MD5		= a02a7fd54c642c1e3578a00ed22f54f8
arm7-multi-patches-$(A7M_PATCHES).patch.xz_MD5	= 6c3b11e51caa278dbeacd1e23c2b171b
$(GRS_PATCHES)_MD5				= d558f2133aae6c1e989a55618ea2cac7


install : $(TARGET)

check : $(patsubst %,$(DIR_CHK)/%,$(objects))

download :$(patsubst %,$(DIR_DL)/%,$(objects))

md5 : $(subst %,%_MD5,$(objects))

dist:
	@$(PAK)
###############################################################################
# Downloading, checking, md5sum
###############################################################################

$(patsubst %,$(DIR_CHK)/%,$(objects)) :
	@$(CHECK)

$(patsubst %,$(DIR_DL)/%,$(objects)) :
	@$(LOAD)

$(subst %,%_MD5,$(objects)) :
	@$(MD5)

###############################################################################
# Installation Details
###############################################################################

$(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
	@$(PREBUILD)
	@rm -rf $(DIR_APP) $(DIR_SRC)/linux && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE)

	ln -svf linux-$(VER) $(DIR_SRC)/linux

	# Linux Intermediate Queueing Device
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9-imq.diff

	# Layer7-patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.13-layer7.patch


ifneq "$(KCFG)" "-headers"
	# Grsecurity-patches
	cd $(DIR_APP) && xz -c -d $(DIR_DL)/$(GRS_PATCHES) | patch -Np1
	cd $(DIR_APP) && rm localversion-grsec
endif

	# DVB Patches
	cd $(DIR_APP) && patch -Np2 < $(DIR_SRC)/src/patches/v4l-dvb_fix_tua6034_pll.patch

	# Wlan Patches
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/backports-4.2.6-1_ath10k_remove_logspam.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.8-ath_ignore_eeprom_regd.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.8-iwlwifi-noibss_only_on_radar_chan.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.8-rt2x00usb_suppress_queue_warnings.patch
#	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.39-add_libertas_uap.patch

	# mISDN Patches
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/mISDN_hfc-s_add_id.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/mISDN-hfcusb-reportl1down.patch

	# Add LED trigger
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.16-ledtrig_netdev.patch

	# cs5535audio spams syslog if no ac97 was present (geos router)
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.8_cs5535audio_fix_logspam_on_geos.patch

	# Add PC Engines APU led support
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.9.8-apu_leds.patch

	# Fix uevent PHYSDEVDRIVER
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-2.6.32.27_mcs7830-fix-driver-name.patch

ifeq "$(KCFG)" "-kirkwood"
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.10-mv_cesa_disable_failing_hmac_sha1.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.22-kirkwood_legacy_boot.patch
endif

ifeq "$(KCFG)" "-multi"
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10-smsc95xx-add_mac_addr_param.patch

	# Apply Arm7-multiarch kernel patches.
	cd $(DIR_APP) && xzcat $(DIR_DL)/arm7-multi-patches-$(A7M_PATCHES).patch.xz | patch -Np1
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/arm-multi-grsec-compile-fixes.patch

	# Install switch api userspace header
	cd $(DIR_APP) && install -v -m644 include/uapi/linux/switch.h /usr/include/linux/

endif

ifeq "$(KCFG)" "-rpi"
	# Apply Raspberry Pi kernel patches.
	cd $(DIR_APP) && xzcat $(DIR_DL)/rpi-patches-$(RPI_PATCHES).patch.xz | patch -Np1
endif

ifeq "$(KCFG)" "-headers"
	# Install the header files
	cd $(DIR_APP) && make ARCH=$(HEADERS_ARCH) INSTALL_HDR_PATH=dest headers_install
	-mkdir -pv $(BUILDROOT)/$(HEADERS_PREFIX)/include
	cd $(DIR_APP) && find dest/include \( -name .install -o -name ..install.cmd \) -delete
	cd $(DIR_APP) && cp -rv dest/include/* $(BUILDROOT)/$(HEADERS_PREFIX)/include
else

	# Install ipfire logo
	cd $(DIR_APP) && cp -vf $(DIR_SRC)/config/kernel/ipfire_logo.ppm \
		drivers/video/logo/logo_linux_clut224.ppm

	# Cleanup kernel source
	cp $(DIR_SRC)/config/kernel/kernel.config.$(MACHINE)-$(VERSUFIX) $(DIR_APP)/.config
	cd $(DIR_APP) && make oldconfig
	cd $(DIR_APP) && make clean
	cd $(DIR_APP) && sed -i -e 's/EXTRAVERSION\ =.*/EXTRAVERSION\ =\ -$(VERSUFIX)/' Makefile

ifeq "$(KCFG)" "-kirkwood"
	cd $(DIR_APP) && make $(MAKETUNING) uImage modules
	cd $(DIR_APP) && cp -v arch/arm/boot/uImage /boot/vmlinuz-$(VER)-$(VERSUFIX)
	cd $(DIR_APP) && cp -v arch/arm/boot/uImage /boot/uImage-$(VERSUFIX)
else
ifeq "$(KCFG)" "-multi"
	cd $(DIR_APP) && make $(MAKETUNING) zImage modules
	cd $(DIR_APP) && cp -v arch/arm/boot/zImage /boot/vmlinuz-$(VER)-$(VERSUFIX)
	cd $(DIR_APP) && cp -v arch/arm/boot/zImage /boot/zImage-$(VERSUFIX)
else
ifeq "$(KCFG)" "-rpi"
	cd $(DIR_APP) && make $(MAKETUNING) zImage modules
	cd $(DIR_APP) && cp -v arch/arm/boot/zImage /boot/vmlinuz-$(VER)-$(VERSUFIX)
	cd $(DIR_APP) && cp -v arch/arm/boot/zImage /boot/kernel.img
else
	cd $(DIR_APP) && make $(MAKETUNING) bzImage modules
	cd $(DIR_APP) && cp -v arch/$(KERNEL_ARCH)/boot/bzImage /boot/vmlinuz-$(VER)-$(VERSUFIX)
endif
endif
endif

	cd $(DIR_APP) && cp -v System.map /boot/System.map-$(VER)-$(VERSUFIX)
	cd $(DIR_APP) && cp -v .config /boot/config-$(VER)-$(VERSUFIX)
	cd $(DIR_APP) && make $(MAKETUNING) modules_install
	cd $(DIR_APP) && make $(MAKETUNING) firmware_install

ifeq "$(MACHINE_TYPE)" "arm"
	cd $(DIR_APP) && make $(MAKETUNING) dtbs
	cd $(DIR_APP) && for f in $$(find arch/arm/boot/dts/ -name *.dtb); do \
				mkdir -p /boot/dtb-$(VER)-$(VERSUFIX) ; \
				install -m 644 $$f /boot/dtb-$(VER)-$(VERSUFIX)/ ; \
			done
endif

ifeq "$(LASTKERNEL)" "1"
	# Only do this once
	cd $(DIR_APP) && install -m 755 usr/gen_init_cpio /sbin/

	# Blacklist matroxfb_base
	echo "blacklist matroxfb_base" >> /etc/modprobe.d/framebuffer.conf
	# Blacklist old framebuffer modules
	for f in $$(find /lib/modules/$(VER)-$(VERSUFIX)/kernel/drivers/video -name *fb.ko); do \
		echo "blacklist $$(basename $$f)" >> /etc/modprobe.d/framebuffer.conf ; \
	done
	# Blacklist new drm framebuffer modules
	for f in $$(ls -1 /lib/modules/$(VER)-$(VERSUFIX)/kernel/drivers/gpu/drm/*/*.ko); do \
		echo "blacklist $$(basename $$f)" >> /etc/modprobe.d/framebuffer.conf ; \
	done
	sed -i -e "s|.ko||g" /etc/modprobe.d/framebuffer.conf

	# Blacklist isdn modules
	for f in $$(find /lib/modules/$(VER)-$(VERSUFIX)/kernel/drivers/isdn -name *.ko); do \
		echo "blacklist $$(basename $$f)" >> /etc/modprobe.d/isdn.conf ; \
	done
	sed -i -e "s|.ko||g" /etc/modprobe.d/isdn.conf

	# Disable ipv6 at runtime
	echo "options ipv6 disable_ipv6=1" > /etc/modprobe.d/ipv6.conf
endif
endif

	#force new build of external modules and initrd if the kernel was rebuild
	-rm -f /usr/src/log/*-kmod-$(VER)-$(VERSUFIX)
	-rm -f /usr/src/log/linux-initrd-$(VER)-$(VERSUFIX)

	@rm -rf $(DIR_SRC)/patch-o-matic* $(DIR_SRC)/iptables* $(DIR_SRC)/squashfs* $(DIR_SRC)/netfilter-layer7-*
	@$(POSTBUILD)