###############################################################################
#                                                                             #
# 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         = 3.14.79
RPI_PATCHES = 3.14.79-grsec-ipfire1
A7M_PATCHES = 3.14.79-grsec-ipfire1
GRS_PATCHES = grsecurity-3.1ipfire-3.14.79-v1.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	   = ""

ifeq "$(MACHINE)" "i586"
	KERNEL_ARCH = i386
else
	KERNEL_ARCH = $(MACHINE)
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)" "armv5tel"
	HEADERS_ARCH=arm
endif

ifeq "$(MACHINE)" "aarch64"
	HEADERS_ARCH=arm64
endif

ifeq "$(MACHINE)" "x86_64"
	HEADERS_ARCH=x86
endif

ifeq "$(MACHINE)" "i586"
	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)

$(DL_FILE)_MD5					= ec5b09d8ad2ebf92e6f51a727a338559
rpi-patches-$(RPI_PATCHES).patch.xz_MD5		= a02a7fd54c642c1e3578a00ed22f54f8
arm7-multi-patches-$(A7M_PATCHES).patch.xz_MD5	= 6c3b11e51caa278dbeacd1e23c2b171b
$(GRS_PATCHES)_MD5				= 7fe448b53558082395f68c5db94af1a7

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-3.14.22-imq.patch

	# Layer7-patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14-layer7-filter.patch

ifneq "$(KCFG)" "-headers"
	# Grsecurity-patches
	cd $(DIR_APP) && xz -c -d $(DIR_DL)/$(GRS_PATCHES) | patch -Np1
	cd $(DIR_APP) && rm localversion-grsec
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.7-disable-compat_vdso.patch
endif

	# DVB Patches
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.22-dvbsky.patch
	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/compat-drivers-3.8.3-ath_ignore_eeprom_regdomain.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.22-iwlwifi-noibss_only_on_radar_chan.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.37-rt2800usb_add_dlink_dwa137_usbid.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.55-rt2800usb-change_queue_warn_to_debug.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.25_rt2x00_fix_bss_bcn_num.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.25-rt5592_no_special_txop_init.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-3.14.22-ledtrig_netdev.patch

	# cs5535audio spams syslog if no ac97 was present (geos router)
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.30_cs5535audio_fix_logspam_on_geos.patch

	# Add PC Engines APU led support
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14-apu_leds.patch

	# Add APU2 SoC ID to k10temp
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.65-k10temp_add_16H_M30H_id.patch

	# Fix uevent PHYSDEVDRIVER
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.2.33_ipg-fix-driver-name.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-2.6.32.27_mcs7830-fix-driver-name.patch

	# r8169 L23 patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.32-r8169_disable_L23.patch

	# update the queued trim blacklist from kernel 4.2rc1
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.43_new_qtrim_blacklist.patch

	# remove eMMC EXT_CSD revision check to use newer eMMC modules
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.79_mmc_remove_EXT_CSD_revision_check.patch

	# Hyper-V patches
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0001-Drivers-net-hyperv-Get-rid-of-the-rndis_filter_packe.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0002-Drivers-net-hyperv-Cleanup-the-receive-path.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0003-Drivers-net-hyperv-Cleanup-the-netvsc-receive-callba.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0004-hyperv-Add-latest-NetVSP-versions-to-auto-negotiatio.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0005-Drivers-net-hyperv-Enable-scatter-gather-I-O.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0006-Drivers-net-hyperv-Cleanup-the-send-path.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0007-Drivers-net-hyperv-Enable-offloads-on-the-host.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0008-Drivers-net-hyperv-Enable-receive-side-IP-checksum-o.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0009-Drivers-net-hyperv-Enable-send-side-checksum-offload.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0010-Drivers-net-hyperv-Enable-large-send-offload.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0011-hyperv-Change-the-receive-buffer-size-for-legacy-hos.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0012-Drivers-net-hyperv-Allocate-memory-for-all-possible-.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0013-Drivers-net-hyperv-Negotiate-suitable-ndis-version-f.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0014-Drivers-net-hyperv-Address-UDP-checksum-issues.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0015-hyperv-Properly-handle-checksum-offload.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0016-hyperv-Add-support-for-virtual-Receive-Side-Scaling-.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0017-hyperv-Remove-recv_pkt_list-and-lock.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0018-hyperv-Simplify-the-send_completion-variables.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0019-hyperv-Enable-sendbuf-mechanism-on-the-send-path.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0020-Add-support-for-netvsc-build-without-CONFIG_SYSFS-fl.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0021-hyperv-Add-hash-value-into-RNDIS-Per-packet-info.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0022-hyperv-fix-apparent-cut-n-paste-error-in-send-path-t.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0023-hyperv-Fix-error-return-code-in-netvsc_init_buf.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0024-hyperv-Fix-a-bug-in-netvsc_send.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0025-Drivers-hv-vmbus-Support-per-channel-driver-state.patch
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-hyperv_Mark_the_Hyoer-V_TSC_as_unstable.patch

ifneq "$(KCFG)" "-headers"
	# fix AES-NI 192 and 256 bits / grsec is needed for this patch version
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0100-crypto-aesni-Add-support-for-192-256-bit-keys-to-AES.patch
endif

	# fix CVE-2016-5195 (Dirty COW)
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/0110-mm-remove-gup_flags-FOLL_WRITE-games-from-__get_user.patch

	# fix empty symbol crc's
	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-genksyms_fix_typeof_handling.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)