From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Fri, 21 Apr 2017 20:37:58 +0200
Subject: procd: remove procd-nand package

We always want to support staged upgrades now, so it's better to include
upgraded into the main package. /lib/upgrade/nand.sh is moved to
base-files.

The procd-nand-firstboot package is removed for now, it may return later
as a separate package.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

diff --git a/package/base-files/Makefile b/package/base-files/Makefile
index 3fcf20a84433eb1a41e970cd010cc414bb180fad..0813f2ae76e2a6b83b5d077b61010d13c1a50fee 100644
--- a/package/base-files/Makefile
+++ b/package/base-files/Makefile
@@ -19,7 +19,9 @@ PKG_BUILD_DEPENDS:=usign/host
 PKG_LICENSE:=GPL-2.0
 
 # Extend depends from version.mk
-PKG_CONFIG_DEPENDS += CONFIG_SIGNED_PACKAGES CONFIG_TARGET_INIT_PATH CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE
+PKG_CONFIG_DEPENDS += \
+	CONFIG_SIGNED_PACKAGES CONFIG_TARGET_INIT_PATH CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE \
+	CONFIG_NAND_SUPPORT
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -31,7 +33,7 @@ endif
 define Package/base-files
   SECTION:=base
   CATEGORY:=Base system
-  DEPENDS:=+netifd +libc +procd +jsonfilter +SIGNED_PACKAGES:usign +SIGNED_PACKAGES:lede-keyring +fstools +fwtool
+  DEPENDS:=+netifd +libc +procd +jsonfilter +SIGNED_PACKAGES:usign +SIGNED_PACKAGES:lede-keyring +NAND_SUPPORT:ubi-utils +fstools +fwtool
   TITLE:=Base filesystem for Lede
   URL:=http://openwrt.org/
   VERSION:=$(PKG_RELEASE)-$(REVISION)
@@ -107,9 +109,16 @@ ifdef CONFIG_SIGNED_PACKAGES
   endef
 endif
 
+ifeq ($(CONFIG_NAND_SUPPORT),)
+  define Package/base-files/nand-support
+	rm -f $(1)/lib/upgrade/nand.sh
+  endef
+endif
+
 define Package/base-files/install
 	$(CP) ./files/* $(1)/
 	$(Package/base-files/install-key)
+	$(Package/base-files/nand-support)
 	if [ -d $(GENERIC_PLATFORM_DIR)/base-files/. ]; then \
 		$(CP) $(GENERIC_PLATFORM_DIR)/base-files/* $(1)/; \
 	fi
diff --git a/package/base-files/files/lib/upgrade/nand.sh b/package/base-files/files/lib/upgrade/nand.sh
new file mode 100644
index 0000000000000000000000000000000000000000..6bd2005344c081df20e5a330a69e49e37225c39f
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/nand.sh
@@ -0,0 +1,376 @@
+#!/bin/sh
+# Copyright (C) 2014 OpenWrt.org
+#
+
+. /lib/functions.sh
+
+# 'kernel' partition on NAND contains the kernel
+CI_KERNPART="kernel"
+
+# 'ubi' partition on NAND contains UBI
+CI_UBIPART="ubi"
+
+ubi_mknod() {
+	local dir="$1"
+	local dev="/dev/$(basename $dir)"
+
+	[ -e "$dev" ] && return 0
+
+	local devid="$(cat $dir/dev)"
+	local major="${devid%%:*}"
+	local minor="${devid##*:}"
+	mknod "$dev" c $major $minor
+}
+
+nand_find_volume() {
+	local ubidevdir ubivoldir
+	ubidevdir="/sys/devices/virtual/ubi/$1"
+	[ ! -d "$ubidevdir" ] && return 1
+	for ubivoldir in $ubidevdir/${1}_*; do
+		[ ! -d "$ubivoldir" ] && continue
+		if [ "$( cat $ubivoldir/name )" = "$2" ]; then
+			basename $ubivoldir
+			ubi_mknod "$ubivoldir"
+			return 0
+		fi
+	done
+}
+
+nand_find_ubi() {
+	local ubidevdir ubidev mtdnum
+	mtdnum="$( find_mtd_index $1 )"
+	[ ! "$mtdnum" ] && return 1
+	for ubidevdir in /sys/devices/virtual/ubi/ubi*; do
+		[ ! -d "$ubidevdir" ] && continue
+		cmtdnum="$( cat $ubidevdir/mtd_num )"
+		[ ! "$mtdnum" ] && continue
+		if [ "$mtdnum" = "$cmtdnum" ]; then
+			ubidev=$( basename $ubidevdir )
+			ubi_mknod "$ubidevdir"
+			echo $ubidev
+			return 0
+		fi
+	done
+}
+
+nand_get_magic_long() {
+	dd if="$1" skip=$2 bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
+}
+
+get_magic_long_tar() {
+	( tar xf $1 $2 -O | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
+}
+
+identify_magic() {
+	local magic=$1
+	case "$magic" in
+		"55424923")
+			echo "ubi"
+			;;
+		"31181006")
+			echo "ubifs"
+			;;
+		"68737173")
+			echo "squashfs"
+			;;
+		"d00dfeed")
+			echo "fit"
+			;;
+		"4349"*)
+			echo "combined"
+			;;
+		*)
+			echo "unknown $magic"
+			;;
+	esac
+}
+
+
+identify() {
+	identify_magic $(nand_get_magic_long "$1" "${2:-0}")
+}
+
+identify_tar() {
+	identify_magic $(get_magic_long_tar "$1" "$2")
+}
+
+nand_restore_config() {
+	sync
+	local ubidev=$( nand_find_ubi $CI_UBIPART )
+	local ubivol="$( nand_find_volume $ubidev rootfs_data )"
+	[ ! "$ubivol" ] &&
+		ubivol="$( nand_find_volume $ubidev rootfs )"
+	mkdir /tmp/new_root
+	if ! mount -t ubifs /dev/$ubivol /tmp/new_root; then
+		echo "mounting ubifs $ubivol failed"
+		rmdir /tmp/new_root
+		return 1
+	fi
+	mv "$1" "/tmp/new_root/sysupgrade.tgz"
+	umount /tmp/new_root
+	sync
+	rmdir /tmp/new_root
+}
+
+nand_upgrade_prepare_ubi() {
+	local rootfs_length="$1"
+	local rootfs_type="$2"
+	local has_kernel="${3:-0}"
+	local has_env="${4:-0}"
+
+	local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
+	if [ ! "$mtdnum" ]; then
+		echo "cannot find ubi mtd partition $CI_UBIPART"
+		return 1
+	fi
+
+	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	if [ ! "$ubidev" ]; then
+		ubiattach -m "$mtdnum"
+		sync
+		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	fi
+
+	if [ ! "$ubidev" ]; then
+		ubiformat /dev/mtd$mtdnum -y
+		ubiattach -m "$mtdnum"
+		sync
+		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+		[ "$has_env" -gt 0 ] && {
+			ubimkvol /dev/$ubidev -n 0 -N ubootenv -s 1MiB
+			ubimkvol /dev/$ubidev -n 1 -N ubootenv2 -s 1MiB
+		}
+	fi
+
+	local kern_ubivol="$( nand_find_volume $ubidev kernel )"
+	local root_ubivol="$( nand_find_volume $ubidev rootfs )"
+	local data_ubivol="$( nand_find_volume $ubidev rootfs_data )"
+
+	# remove ubiblock device of rootfs
+	local root_ubiblk="ubiblock${root_ubivol:3}"
+	if [ "$root_ubivol" -a -e "/dev/$root_ubiblk" ]; then
+		echo "removing $root_ubiblk"
+		if ! ubiblock -r /dev/$root_ubivol; then
+			echo "cannot remove $root_ubiblk"
+			return 1;
+		fi
+	fi
+
+	# kill volumes
+	[ "$kern_ubivol" ] && ubirmvol /dev/$ubidev -N kernel || true
+	[ "$root_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs || true
+	[ "$data_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs_data || true
+
+	# update kernel
+	if [ "$has_kernel" = "1" ]; then
+		if ! ubimkvol /dev/$ubidev -N kernel -s $kernel_length; then
+			echo "cannot create kernel volume"
+			return 1;
+		fi
+	fi
+
+	# update rootfs
+	local root_size_param
+	if [ "$rootfs_type" = "ubifs" ]; then
+		root_size_param="-m"
+	else
+		root_size_param="-s $rootfs_length"
+	fi
+	if ! ubimkvol /dev/$ubidev -N rootfs $root_size_param; then
+		echo "cannot create rootfs volume"
+		return 1;
+	fi
+
+	# create rootfs_data for non-ubifs rootfs
+	if [ "$rootfs_type" != "ubifs" ]; then
+		if ! ubimkvol /dev/$ubidev -N rootfs_data -m; then
+			echo "cannot initialize rootfs_data volume"
+			return 1
+		fi
+	fi
+	sync
+	return 0
+}
+
+nand_do_upgrade_success() {
+	local conf_tar="/tmp/sysupgrade.tgz"
+
+	sync
+	[ -f "$conf_tar" ] && nand_restore_config "$conf_tar"
+	echo "sysupgrade successful"
+	umount -a
+	reboot -f
+}
+
+# Flash the UBI image to MTD partition
+nand_upgrade_ubinized() {
+	local ubi_file="$1"
+	local mtdnum="$(find_mtd_index "$CI_UBIPART")"
+
+	[ ! "$mtdnum" ] && {
+		CI_UBIPART="rootfs"
+		mtdnum="$(find_mtd_index "$CI_UBIPART")"
+	}
+
+	if [ ! "$mtdnum" ]; then
+		echo "cannot find mtd device $CI_UBIPART"
+		umount -a
+		reboot -f
+	fi
+
+	local mtddev="/dev/mtd${mtdnum}"
+	ubidetach -p "${mtddev}" || true
+	sync
+	ubiformat "${mtddev}" -y -f "${ubi_file}"
+	ubiattach -p "${mtddev}"
+	nand_do_upgrade_success
+}
+
+# Write the UBIFS image to UBI volume
+nand_upgrade_ubifs() {
+	local rootfs_length=`(cat $1 | wc -c) 2> /dev/null`
+
+	nand_upgrade_prepare_ubi "$rootfs_length" "ubifs" "0" "0"
+
+	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	local root_ubivol="$(nand_find_volume $ubidev rootfs)"
+	ubiupdatevol /dev/$root_ubivol -s $rootfs_length $1
+
+	nand_do_upgrade_success
+}
+
+nand_board_name() {
+	if type 'platform_nand_board_name' >/dev/null 2>/dev/null; then
+		platform_nand_board_name
+		return
+	fi
+
+	cat /tmp/sysinfo/board_name
+}
+
+nand_upgrade_tar() {
+	local tar_file="$1"
+	local board_name="$(nand_board_name)"
+	local kernel_mtd="$(find_mtd_index $CI_KERNPART)"
+
+	local kernel_length=`(tar xf $tar_file sysupgrade-$board_name/kernel -O | wc -c) 2> /dev/null`
+	local rootfs_length=`(tar xf $tar_file sysupgrade-$board_name/root -O | wc -c) 2> /dev/null`
+
+	local rootfs_type="$(identify_tar "$tar_file" sysupgrade-$board_name/root)"
+
+	local has_kernel=1
+	local has_env=0
+
+	[ "$kernel_length" != 0 -a -n "$kernel_mtd" ] && {
+		tar xf $tar_file sysupgrade-$board_name/kernel -O | mtd write - $CI_KERNPART
+	}
+	[ "$kernel_length" = 0 -o ! -z "$kernel_mtd" ] && has_kernel=0
+
+	nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "$has_kernel" "$has_env"
+
+	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	[ "$has_kernel" = "1" ] && {
+		local kern_ubivol="$(nand_find_volume $ubidev kernel)"
+	 	tar xf $tar_file sysupgrade-$board_name/kernel -O | \
+			ubiupdatevol /dev/$kern_ubivol -s $kernel_length -
+	}
+
+	local root_ubivol="$(nand_find_volume $ubidev rootfs)"
+	tar xf $tar_file sysupgrade-$board_name/root -O | \
+		ubiupdatevol /dev/$root_ubivol -s $rootfs_length -
+
+	nand_do_upgrade_success
+}
+
+# Recognize type of passed file and start the upgrade process
+nand_do_upgrade_stage2() {
+	local file_type=$(identify $1)
+
+	if type 'platform_nand_pre_upgrade' >/dev/null 2>/dev/null; then
+		platform_nand_pre_upgrade "$1"
+	fi
+
+	[ ! "$(find_mtd_index "$CI_UBIPART")" ] && CI_UBIPART="rootfs"
+
+	case "$file_type" in
+		"ubi")		nand_upgrade_ubinized $1;;
+		"ubifs")	nand_upgrade_ubifs $1;;
+		*)		nand_upgrade_tar $1;;
+	esac
+}
+
+nand_upgrade_stage2() {
+	[ $1 = "nand" ] && {
+		[ -f "$2" ] && {
+			touch /tmp/sysupgrade
+
+			killall -9 telnetd
+			killall -9 dropbear
+			killall -9 ash
+
+			kill_remaining TERM
+			sleep 3
+			kill_remaining KILL
+
+			sleep 1
+
+			if [ -n "$(rootfs_type)" ]; then
+				v "Switching to ramdisk..."
+				run_ramfs ". /lib/functions.sh; include /lib/upgrade; nand_do_upgrade_stage2 $2"
+			else
+				nand_do_upgrade_stage2 $2
+			fi
+			return 0
+		}
+		echo "Nand upgrade failed"
+		exit 1
+	}
+}
+
+nand_upgrade_stage1() {
+	[ -f /tmp/sysupgrade-nand-path ] && {
+		path="$(cat /tmp/sysupgrade-nand-path)"
+		[ "$SAVE_CONFIG" != 1 -a -f "$CONF_TAR" ] &&
+			rm $CONF_TAR
+
+		ubus call system nandupgrade "{\"prefix\": \"$RAM_ROOT\", \"path\": \"$path\" }"
+		exit 0
+	}
+}
+
+# Check if passed file is a valid one for NAND sysupgrade. Currently it accepts
+# 3 types of files:
+# 1) UBI - should contain an ubinized image, header is checked for the proper
+#    MAGIC
+# 2) UBIFS - should contain UBIFS partition that will replace "rootfs" volume,
+#    header is checked for the proper MAGIC
+# 3) TAR - archive has to include "sysupgrade-BOARD" directory with a non-empty
+#    "CONTROL" file (at this point its content isn't verified)
+#
+# You usually want to call this function in platform_check_image.
+#
+# $(1): board name, used in case of passing TAR file
+# $(2): file to be checked
+nand_do_platform_check() {
+	local board_name="$1"
+	local tar_file="$2"
+	local control_length=`(tar xf $tar_file sysupgrade-$board_name/CONTROL -O | wc -c) 2> /dev/null`
+	local file_type="$(identify $2)"
+
+	[ "$control_length" = 0 -a "$file_type" != "ubi" -a "$file_type" != "ubifs" ] && {
+		echo "Invalid sysupgrade file."
+		return 1
+	}
+
+	return 0
+}
+
+# Start NAND upgrade process
+#
+# $(1): file to be used for upgrade
+nand_do_upgrade() {
+	echo -n $1 > /tmp/sysupgrade-nand-path
+	install_bin /sbin/upgraded
+	ln -s "$RAM_ROOT"/sbin/upgraded /tmp/upgraded
+	nand_upgrade_stage1
+}
diff --git a/package/system/procd/Makefile b/package/system/procd/Makefile
index 5b92d79332f2ea400041586b92b570d8b633218a..879f03f54b23603a360499078d7d53503875f55a 100644
--- a/package/system/procd/Makefile
+++ b/package/system/procd/Makefile
@@ -22,11 +22,9 @@ PKG_LICENSE_FILES:=
 
 PKG_MAINTAINER:=John Crispin <john@phrozen.org>
 
-PKG_FLAGS:=nonshared
-
 PKG_CONFIG_DEPENDS:= \
 	CONFIG_TARGET_INIT_PATH CONFIG_KERNEL_SECCOMP \
-	CONFIG_NAND_SUPPORT CONFIG_PROCD_SHOW_BOOT CONFIG_PROCD_ZRAM_TMPFS \
+	CONFIG_PROCD_SHOW_BOOT CONFIG_PROCD_ZRAM_TMPFS \
 	CONFIG_KERNEL_NAMESPACES CONFIG_PACKAGE_procd-ujail CONFIG_PACKAGE_procd-seccomp
 
 include $(INCLUDE_DIR)/package.mk
@@ -42,7 +40,7 @@ TARGET_LDFLAGS += $(if $(CONFIG_USE_GLIBC),-lrt)
 define Package/procd
   SECTION:=base
   CATEGORY:=Base system
-  DEPENDS:=+ubusd +ubus +libjson-script +ubox +USE_GLIBC:librt +libubox +libubus +NAND_SUPPORT:procd-nand
+  DEPENDS:=+ubusd +ubus +libjson-script +ubox +USE_GLIBC:librt +libubox +libubus
   TITLE:=OpenWrt system process manager
 endef
 
@@ -60,20 +58,6 @@ define Package/procd-seccomp
   TITLE:=OpenWrt process seccomp helper + utrace
 endef
 
-define Package/procd-nand
-  SECTION:=utils
-  CATEGORY:=Utilities
-  DEPENDS:=@NAND_SUPPORT +ubi-utils
-  TITLE:=OpenWrt sysupgrade nand helper
-endef
-
-define Package/procd-nand-firstboot
-  SECTION:=utils
-  CATEGORY:=Utilities
-  DEPENDS:=procd-nand
-  TITLE:=OpenWrt firstboot nand helper
-endef
-
 define Package/procd/config
 menu "Configuration"
 	depends on PACKAGE_procd
@@ -91,10 +75,6 @@ endmenu
 endef
 
 
-ifeq ($(CONFIG_NAND_SUPPORT),y)
-  CMAKE_OPTIONS += -DBUILD_UPGRADED=1
-endif
-
 ifeq ($(CONFIG_PROCD_SHOW_BOOT),y)
   CMAKE_OPTIONS += -DSHOW_BOOT_ON_CONSOLE=1
 endif
@@ -113,7 +93,7 @@ CMAKE_OPTIONS += -DSECCOMP_SUPPORT=$(SECCOMP) -DUTRACE_SUPPORT=$(SECCOMP)
 define Package/procd/install
 	$(INSTALL_DIR) $(1)/sbin $(1)/etc $(1)/lib/functions
 
-	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/{init,procd,askfirst,udevtrigger} $(1)/sbin/
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/{init,procd,askfirst,udevtrigger,upgraded} $(1)/sbin/
 	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libsetlbf.so $(1)/lib
 	$(INSTALL_BIN) ./files/reload_config $(1)/sbin/
 	$(INSTALL_DATA) ./files/hotplug*.json $(1)/etc/
@@ -133,21 +113,6 @@ define Package/procd-seccomp/install
 	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libpreload-trace.so $(1)/lib
 endef
 
-define Package/procd-nand/install
-	$(INSTALL_DIR) $(1)/sbin $(1)/lib/upgrade
-
-	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/upgraded $(1)/sbin/
-	$(INSTALL_DATA) ./files/nand.sh $(1)/lib/upgrade/
-endef
-
-define Package/procd-nand-firstboot/install
-	$(INSTALL_DIR) $(1)/lib/preinit
-
-	$(INSTALL_DATA) ./files/nand-preinit.sh $(1)/lib/preinit/60-nand-firstboot.sh
-endef
-
 $(eval $(call BuildPackage,procd))
 $(eval $(call BuildPackage,procd-ujail))
 $(eval $(call BuildPackage,procd-seccomp))
-$(eval $(call BuildPackage,procd-nand))
-$(eval $(call BuildPackage,procd-nand-firstboot))
diff --git a/package/system/procd/files/nand-preinit.sh b/package/system/procd/files/nand-preinit.sh
deleted file mode 100644
index cf596246d1f2891cbeb7b5c7cac4bb6e002b13fb..0000000000000000000000000000000000000000
--- a/package/system/procd/files/nand-preinit.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/sh
-# Copyright (C) 2014 OpenWrt.org
-
-nand_takeover() {
-	. /lib/upgrade/nand.sh
-	mtd=$(find_mtd_index "$CI_UBIPART")
-	esize=$(cat /proc/mtd | grep mtd$mtd |cut -d" " -f 3)
-	[ -z "$esize" ] && return 1
-	esize=$(printf "%d" 0x$esize)
-	for a in `seq 0 64`; do
-		mtd -o $((a * esize)) -l 400 dump /dev/mtd$mtd > /tmp/takeover.hdr
-		MAGIC=$(dd if=/tmp/takeover.hdr bs=1 skip=261 count=5 2> /dev/null)
-		SIZE=$(printf "%d" 0x$(dd if=/tmp/takeover.hdr bs=4 count=1 2> /dev/null | hexdump -v -n 4 -e '1/1 "%02x"'))
-		[ "$MAGIC" = "ustar" ] && {
-			mtd -o $((a * esize)) -l $((SIZE + 4)) dump /dev/mtd$mtd | dd bs=1 skip=4 of=/tmp/sysupgrade.tar
-			nand_do_upgrade_stage2 /tmp/sysupgrade.tar
-		}
-	done
-}
-
-boot_hook_add initramfs nand_takeover
diff --git a/package/system/procd/files/nand.sh b/package/system/procd/files/nand.sh
deleted file mode 100644
index 6bd2005344c081df20e5a330a69e49e37225c39f..0000000000000000000000000000000000000000
--- a/package/system/procd/files/nand.sh
+++ /dev/null
@@ -1,376 +0,0 @@
-#!/bin/sh
-# Copyright (C) 2014 OpenWrt.org
-#
-
-. /lib/functions.sh
-
-# 'kernel' partition on NAND contains the kernel
-CI_KERNPART="kernel"
-
-# 'ubi' partition on NAND contains UBI
-CI_UBIPART="ubi"
-
-ubi_mknod() {
-	local dir="$1"
-	local dev="/dev/$(basename $dir)"
-
-	[ -e "$dev" ] && return 0
-
-	local devid="$(cat $dir/dev)"
-	local major="${devid%%:*}"
-	local minor="${devid##*:}"
-	mknod "$dev" c $major $minor
-}
-
-nand_find_volume() {
-	local ubidevdir ubivoldir
-	ubidevdir="/sys/devices/virtual/ubi/$1"
-	[ ! -d "$ubidevdir" ] && return 1
-	for ubivoldir in $ubidevdir/${1}_*; do
-		[ ! -d "$ubivoldir" ] && continue
-		if [ "$( cat $ubivoldir/name )" = "$2" ]; then
-			basename $ubivoldir
-			ubi_mknod "$ubivoldir"
-			return 0
-		fi
-	done
-}
-
-nand_find_ubi() {
-	local ubidevdir ubidev mtdnum
-	mtdnum="$( find_mtd_index $1 )"
-	[ ! "$mtdnum" ] && return 1
-	for ubidevdir in /sys/devices/virtual/ubi/ubi*; do
-		[ ! -d "$ubidevdir" ] && continue
-		cmtdnum="$( cat $ubidevdir/mtd_num )"
-		[ ! "$mtdnum" ] && continue
-		if [ "$mtdnum" = "$cmtdnum" ]; then
-			ubidev=$( basename $ubidevdir )
-			ubi_mknod "$ubidevdir"
-			echo $ubidev
-			return 0
-		fi
-	done
-}
-
-nand_get_magic_long() {
-	dd if="$1" skip=$2 bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
-}
-
-get_magic_long_tar() {
-	( tar xf $1 $2 -O | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
-}
-
-identify_magic() {
-	local magic=$1
-	case "$magic" in
-		"55424923")
-			echo "ubi"
-			;;
-		"31181006")
-			echo "ubifs"
-			;;
-		"68737173")
-			echo "squashfs"
-			;;
-		"d00dfeed")
-			echo "fit"
-			;;
-		"4349"*)
-			echo "combined"
-			;;
-		*)
-			echo "unknown $magic"
-			;;
-	esac
-}
-
-
-identify() {
-	identify_magic $(nand_get_magic_long "$1" "${2:-0}")
-}
-
-identify_tar() {
-	identify_magic $(get_magic_long_tar "$1" "$2")
-}
-
-nand_restore_config() {
-	sync
-	local ubidev=$( nand_find_ubi $CI_UBIPART )
-	local ubivol="$( nand_find_volume $ubidev rootfs_data )"
-	[ ! "$ubivol" ] &&
-		ubivol="$( nand_find_volume $ubidev rootfs )"
-	mkdir /tmp/new_root
-	if ! mount -t ubifs /dev/$ubivol /tmp/new_root; then
-		echo "mounting ubifs $ubivol failed"
-		rmdir /tmp/new_root
-		return 1
-	fi
-	mv "$1" "/tmp/new_root/sysupgrade.tgz"
-	umount /tmp/new_root
-	sync
-	rmdir /tmp/new_root
-}
-
-nand_upgrade_prepare_ubi() {
-	local rootfs_length="$1"
-	local rootfs_type="$2"
-	local has_kernel="${3:-0}"
-	local has_env="${4:-0}"
-
-	local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
-	if [ ! "$mtdnum" ]; then
-		echo "cannot find ubi mtd partition $CI_UBIPART"
-		return 1
-	fi
-
-	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
-	if [ ! "$ubidev" ]; then
-		ubiattach -m "$mtdnum"
-		sync
-		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
-	fi
-
-	if [ ! "$ubidev" ]; then
-		ubiformat /dev/mtd$mtdnum -y
-		ubiattach -m "$mtdnum"
-		sync
-		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
-		[ "$has_env" -gt 0 ] && {
-			ubimkvol /dev/$ubidev -n 0 -N ubootenv -s 1MiB
-			ubimkvol /dev/$ubidev -n 1 -N ubootenv2 -s 1MiB
-		}
-	fi
-
-	local kern_ubivol="$( nand_find_volume $ubidev kernel )"
-	local root_ubivol="$( nand_find_volume $ubidev rootfs )"
-	local data_ubivol="$( nand_find_volume $ubidev rootfs_data )"
-
-	# remove ubiblock device of rootfs
-	local root_ubiblk="ubiblock${root_ubivol:3}"
-	if [ "$root_ubivol" -a -e "/dev/$root_ubiblk" ]; then
-		echo "removing $root_ubiblk"
-		if ! ubiblock -r /dev/$root_ubivol; then
-			echo "cannot remove $root_ubiblk"
-			return 1;
-		fi
-	fi
-
-	# kill volumes
-	[ "$kern_ubivol" ] && ubirmvol /dev/$ubidev -N kernel || true
-	[ "$root_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs || true
-	[ "$data_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs_data || true
-
-	# update kernel
-	if [ "$has_kernel" = "1" ]; then
-		if ! ubimkvol /dev/$ubidev -N kernel -s $kernel_length; then
-			echo "cannot create kernel volume"
-			return 1;
-		fi
-	fi
-
-	# update rootfs
-	local root_size_param
-	if [ "$rootfs_type" = "ubifs" ]; then
-		root_size_param="-m"
-	else
-		root_size_param="-s $rootfs_length"
-	fi
-	if ! ubimkvol /dev/$ubidev -N rootfs $root_size_param; then
-		echo "cannot create rootfs volume"
-		return 1;
-	fi
-
-	# create rootfs_data for non-ubifs rootfs
-	if [ "$rootfs_type" != "ubifs" ]; then
-		if ! ubimkvol /dev/$ubidev -N rootfs_data -m; then
-			echo "cannot initialize rootfs_data volume"
-			return 1
-		fi
-	fi
-	sync
-	return 0
-}
-
-nand_do_upgrade_success() {
-	local conf_tar="/tmp/sysupgrade.tgz"
-
-	sync
-	[ -f "$conf_tar" ] && nand_restore_config "$conf_tar"
-	echo "sysupgrade successful"
-	umount -a
-	reboot -f
-}
-
-# Flash the UBI image to MTD partition
-nand_upgrade_ubinized() {
-	local ubi_file="$1"
-	local mtdnum="$(find_mtd_index "$CI_UBIPART")"
-
-	[ ! "$mtdnum" ] && {
-		CI_UBIPART="rootfs"
-		mtdnum="$(find_mtd_index "$CI_UBIPART")"
-	}
-
-	if [ ! "$mtdnum" ]; then
-		echo "cannot find mtd device $CI_UBIPART"
-		umount -a
-		reboot -f
-	fi
-
-	local mtddev="/dev/mtd${mtdnum}"
-	ubidetach -p "${mtddev}" || true
-	sync
-	ubiformat "${mtddev}" -y -f "${ubi_file}"
-	ubiattach -p "${mtddev}"
-	nand_do_upgrade_success
-}
-
-# Write the UBIFS image to UBI volume
-nand_upgrade_ubifs() {
-	local rootfs_length=`(cat $1 | wc -c) 2> /dev/null`
-
-	nand_upgrade_prepare_ubi "$rootfs_length" "ubifs" "0" "0"
-
-	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
-	local root_ubivol="$(nand_find_volume $ubidev rootfs)"
-	ubiupdatevol /dev/$root_ubivol -s $rootfs_length $1
-
-	nand_do_upgrade_success
-}
-
-nand_board_name() {
-	if type 'platform_nand_board_name' >/dev/null 2>/dev/null; then
-		platform_nand_board_name
-		return
-	fi
-
-	cat /tmp/sysinfo/board_name
-}
-
-nand_upgrade_tar() {
-	local tar_file="$1"
-	local board_name="$(nand_board_name)"
-	local kernel_mtd="$(find_mtd_index $CI_KERNPART)"
-
-	local kernel_length=`(tar xf $tar_file sysupgrade-$board_name/kernel -O | wc -c) 2> /dev/null`
-	local rootfs_length=`(tar xf $tar_file sysupgrade-$board_name/root -O | wc -c) 2> /dev/null`
-
-	local rootfs_type="$(identify_tar "$tar_file" sysupgrade-$board_name/root)"
-
-	local has_kernel=1
-	local has_env=0
-
-	[ "$kernel_length" != 0 -a -n "$kernel_mtd" ] && {
-		tar xf $tar_file sysupgrade-$board_name/kernel -O | mtd write - $CI_KERNPART
-	}
-	[ "$kernel_length" = 0 -o ! -z "$kernel_mtd" ] && has_kernel=0
-
-	nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "$has_kernel" "$has_env"
-
-	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
-	[ "$has_kernel" = "1" ] && {
-		local kern_ubivol="$(nand_find_volume $ubidev kernel)"
-	 	tar xf $tar_file sysupgrade-$board_name/kernel -O | \
-			ubiupdatevol /dev/$kern_ubivol -s $kernel_length -
-	}
-
-	local root_ubivol="$(nand_find_volume $ubidev rootfs)"
-	tar xf $tar_file sysupgrade-$board_name/root -O | \
-		ubiupdatevol /dev/$root_ubivol -s $rootfs_length -
-
-	nand_do_upgrade_success
-}
-
-# Recognize type of passed file and start the upgrade process
-nand_do_upgrade_stage2() {
-	local file_type=$(identify $1)
-
-	if type 'platform_nand_pre_upgrade' >/dev/null 2>/dev/null; then
-		platform_nand_pre_upgrade "$1"
-	fi
-
-	[ ! "$(find_mtd_index "$CI_UBIPART")" ] && CI_UBIPART="rootfs"
-
-	case "$file_type" in
-		"ubi")		nand_upgrade_ubinized $1;;
-		"ubifs")	nand_upgrade_ubifs $1;;
-		*)		nand_upgrade_tar $1;;
-	esac
-}
-
-nand_upgrade_stage2() {
-	[ $1 = "nand" ] && {
-		[ -f "$2" ] && {
-			touch /tmp/sysupgrade
-
-			killall -9 telnetd
-			killall -9 dropbear
-			killall -9 ash
-
-			kill_remaining TERM
-			sleep 3
-			kill_remaining KILL
-
-			sleep 1
-
-			if [ -n "$(rootfs_type)" ]; then
-				v "Switching to ramdisk..."
-				run_ramfs ". /lib/functions.sh; include /lib/upgrade; nand_do_upgrade_stage2 $2"
-			else
-				nand_do_upgrade_stage2 $2
-			fi
-			return 0
-		}
-		echo "Nand upgrade failed"
-		exit 1
-	}
-}
-
-nand_upgrade_stage1() {
-	[ -f /tmp/sysupgrade-nand-path ] && {
-		path="$(cat /tmp/sysupgrade-nand-path)"
-		[ "$SAVE_CONFIG" != 1 -a -f "$CONF_TAR" ] &&
-			rm $CONF_TAR
-
-		ubus call system nandupgrade "{\"prefix\": \"$RAM_ROOT\", \"path\": \"$path\" }"
-		exit 0
-	}
-}
-
-# Check if passed file is a valid one for NAND sysupgrade. Currently it accepts
-# 3 types of files:
-# 1) UBI - should contain an ubinized image, header is checked for the proper
-#    MAGIC
-# 2) UBIFS - should contain UBIFS partition that will replace "rootfs" volume,
-#    header is checked for the proper MAGIC
-# 3) TAR - archive has to include "sysupgrade-BOARD" directory with a non-empty
-#    "CONTROL" file (at this point its content isn't verified)
-#
-# You usually want to call this function in platform_check_image.
-#
-# $(1): board name, used in case of passing TAR file
-# $(2): file to be checked
-nand_do_platform_check() {
-	local board_name="$1"
-	local tar_file="$2"
-	local control_length=`(tar xf $tar_file sysupgrade-$board_name/CONTROL -O | wc -c) 2> /dev/null`
-	local file_type="$(identify $2)"
-
-	[ "$control_length" = 0 -a "$file_type" != "ubi" -a "$file_type" != "ubifs" ] && {
-		echo "Invalid sysupgrade file."
-		return 1
-	}
-
-	return 0
-}
-
-# Start NAND upgrade process
-#
-# $(1): file to be used for upgrade
-nand_do_upgrade() {
-	echo -n $1 > /tmp/sysupgrade-nand-path
-	install_bin /sbin/upgraded
-	ln -s "$RAM_ROOT"/sbin/upgraded /tmp/upgraded
-	nand_upgrade_stage1
-}