ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
new file mode 100644
index 0000000..af1182c
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -0,0 +1,317 @@
+RAM_ROOT=/tmp/root
+
+export BACKUP_FILE=sysupgrade.tgz # file extracted by preinit
+
+[ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
+libs() { ldd $* 2>/dev/null | sed -E 's/(.* => )?(.*) .*/\2/'; }
+
+install_file() { # <file> [ <file> ... ]
+ local target dest dir
+ for file in "$@"; do
+ if [ -L "$file" ]; then
+ target="$(readlink -f "$file")"
+ dest="$RAM_ROOT/$file"
+ [ ! -f "$dest" ] && {
+ dir="$(dirname "$dest")"
+ mkdir -p "$dir"
+ ln -s "$target" "$dest"
+ }
+ file="$target"
+ fi
+ dest="$RAM_ROOT/$file"
+ [ -f "$file" -a ! -f "$dest" ] && {
+ dir="$(dirname "$dest")"
+ mkdir -p "$dir"
+ cp "$file" "$dest"
+ }
+ done
+}
+
+install_bin() {
+ local src files
+ src=$1
+ files=$1
+ [ -x "$src" ] && files="$src $(libs $src)"
+ install_file $files
+}
+
+run_hooks() {
+ local arg="$1"; shift
+ for func in "$@"; do
+ eval "$func $arg"
+ done
+}
+
+ask_bool() {
+ local default="$1"; shift;
+ local answer="$default"
+
+ [ "$INTERACTIVE" -eq 1 ] && {
+ case "$default" in
+ 0) echo -n "$* (y/N): ";;
+ *) echo -n "$* (Y/n): ";;
+ esac
+ read answer
+ case "$answer" in
+ y*) answer=1;;
+ n*) answer=0;;
+ *) answer="$default";;
+ esac
+ }
+ [ "$answer" -gt 0 ]
+}
+
+_v() {
+ [ -n "$VERBOSE" ] && [ "$VERBOSE" -ge 1 ] && echo "$*" >&2
+}
+
+v() {
+ _v "$(date) upgrade: $@"
+ logger -p info -t upgrade "$@"
+}
+
+json_string() {
+ local v="$1"
+ v="${v//\\/\\\\}"
+ v="${v//\"/\\\"}"
+ echo "\"$v\""
+}
+
+rootfs_type() {
+ /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
+}
+
+get_image() { # <source> [ <command> ]
+ local from="$1"
+ local cmd="$2"
+
+ if [ -z "$cmd" ]; then
+ local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
+ case "$magic" in
+ 1f8b) cmd="busybox zcat";;
+ *) cmd="cat";;
+ esac
+ fi
+
+ $cmd <"$from"
+}
+
+get_image_dd() {
+ local from="$1"; shift
+
+ (
+ exec 3>&2
+ ( exec 3>&2; get_image "$from" 2>&1 1>&3 | grep -v -F ' Broken pipe' ) 2>&1 1>&3 \
+ | ( exec 3>&2; dd "$@" 2>&1 1>&3 | grep -v -E ' records (in|out)') 2>&1 1>&3
+ exec 3>&-
+ )
+}
+
+get_magic_word() {
+ (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
+}
+
+get_magic_long() {
+ (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
+}
+
+get_magic_gpt() {
+ (get_image "$@" | dd bs=8 count=1 skip=64) 2>/dev/null
+}
+
+get_magic_vfat() {
+ (get_image "$@" | dd bs=3 count=1 skip=18) 2>/dev/null
+}
+
+get_magic_fat32() {
+ (get_image "$@" | dd bs=1 count=5 skip=82) 2>/dev/null
+}
+
+identify_magic_long() {
+ local magic=$1
+ case "$magic" in
+ "55424923")
+ echo "ubi"
+ ;;
+ "31181006")
+ echo "ubifs"
+ ;;
+ "68737173")
+ echo "squashfs"
+ ;;
+ "d00dfeed")
+ echo "fit"
+ ;;
+ "4349"*)
+ echo "combined"
+ ;;
+ "1f8b"*)
+ echo "gzip"
+ ;;
+ *)
+ echo "unknown $magic"
+ ;;
+ esac
+}
+
+part_magic_efi() {
+ local magic=$(get_magic_gpt "$@")
+ [ "$magic" = "EFI PART" ]
+}
+
+part_magic_fat() {
+ local magic=$(get_magic_vfat "$@")
+ local magic_fat32=$(get_magic_fat32 "$@")
+ [ "$magic" = "FAT" ] || [ "$magic_fat32" = "FAT32" ]
+}
+
+export_bootdevice() {
+ local cmdline uuid blockdev uevent line class
+ local MAJOR MINOR DEVNAME DEVTYPE
+ local rootpart="$(cmdline_get_var root)"
+
+ case "$rootpart" in
+ PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
+ uuid="${rootpart#PARTUUID=}"
+ uuid="${uuid%-[a-f0-9][a-f0-9]}"
+ for blockdev in $(find /dev -type b); do
+ set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
+ if [ "$4$3$2$1" = "$uuid" ]; then
+ uevent="/sys/class/block/${blockdev##*/}/uevent"
+ break
+ fi
+ done
+ ;;
+ PARTUUID=????????-????-????-????-??????????0?/PARTNROFF=1 | \
+ PARTUUID=????????-????-????-????-??????????02)
+ uuid="${rootpart#PARTUUID=}"
+ uuid="${uuid%/PARTNROFF=1}"
+ uuid="${uuid%0?}00"
+ for disk in $(find /dev -type b); do
+ set -- $(dd if=$disk bs=1 skip=568 count=16 2>/dev/null | hexdump -v -e '8/1 "%02x "" "2/1 "%02x""-"6/1 "%02x"')
+ if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
+ uevent="/sys/class/block/${disk##*/}/uevent"
+ break
+ fi
+ done
+ ;;
+ /dev/*)
+ uevent="/sys/class/block/${rootpart##*/}/../uevent"
+ ;;
+ 0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
+ [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
+ rootpart=0x${rootpart#0x}
+ for class in /sys/class/block/*; do
+ while read line; do
+ export -n "$line"
+ done < "$class/uevent"
+ if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
+ uevent="$class/../uevent"
+ fi
+ done
+ ;;
+ esac
+
+ if [ -e "$uevent" ]; then
+ while read line; do
+ export -n "$line"
+ done < "$uevent"
+ export BOOTDEV_MAJOR=$MAJOR
+ export BOOTDEV_MINOR=$MINOR
+ return 0
+ fi
+
+ return 1
+}
+
+export_partdevice() {
+ local var="$1" offset="$2"
+ local uevent line MAJOR MINOR DEVNAME DEVTYPE
+
+ for uevent in /sys/class/block/*/uevent; do
+ while read line; do
+ export -n "$line"
+ done < "$uevent"
+ if [ "$BOOTDEV_MAJOR" = "$MAJOR" -a $(($BOOTDEV_MINOR + $offset)) = "$MINOR" -a -b "/dev/$DEVNAME" ]; then
+ export "$var=$DEVNAME"
+ return 0
+ fi
+ done
+
+ return 1
+}
+
+hex_le32_to_cpu() {
+ [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
+ echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
+ return
+ }
+ echo "$@"
+}
+
+get_partitions() { # <device> <filename>
+ local disk="$1"
+ local filename="$2"
+
+ if [ -b "$disk" -o -f "$disk" ]; then
+ v "Reading partition table from $filename..."
+
+ local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
+ if [ "$magic" != $'\x55\xAA' ]; then
+ v "Invalid partition table on $disk"
+ exit
+ fi
+
+ rm -f "/tmp/partmap.$filename"
+
+ local part
+ part_magic_efi "$disk" && {
+ #export_partdevice will fail when partition number is greater than 15, as
+ #the partition major device number is not equal to the disk major device number
+ for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
+ set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
+
+ local type="$1"
+ local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
+ local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
+ local num="$(( $end - $lba + 1 ))"
+
+ [ "$type" = "00000000000000000000000000000000" ] && continue
+
+ printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
+ done
+ } || {
+ for part in 1 2 3 4; do
+ set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
+
+ local type="$(( $(hex_le32_to_cpu $1) % 256))"
+ local lba="$(( $(hex_le32_to_cpu $2) ))"
+ local num="$(( $(hex_le32_to_cpu $3) ))"
+
+ [ $type -gt 0 ] || continue
+
+ printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
+ done
+ }
+ fi
+}
+
+indicate_upgrade() {
+ . /etc/diag.sh
+ set_state upgrade
+}
+
+# Flash firmware to MTD partition
+#
+# $(1): path to image
+# $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
+default_do_upgrade() {
+ sync
+ echo 3 > /proc/sys/vm/drop_caches
+ if [ -n "$UPGRADE_BACKUP" ]; then
+ get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
+ else
+ get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
+ fi
+ [ $? -ne 0 ] && exit 1
+}
diff --git a/package/base-files/files/lib/upgrade/do_stage2 b/package/base-files/files/lib/upgrade/do_stage2
new file mode 100755
index 0000000..0e32445
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/do_stage2
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+. /lib/functions.sh
+
+include /lib/upgrade
+
+v "Performing system upgrade..."
+if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
+ platform_do_upgrade "$IMAGE"
+else
+ default_do_upgrade "$IMAGE"
+fi
+
+if [ -n "$UPGRADE_BACKUP" ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
+ platform_copy_config
+fi
+
+v "Upgrade completed"
+sleep 1
+
+v "Rebooting system..."
+umount -a
+reboot -f
+sleep 5
+echo b 2>/dev/null >/proc/sysrq-trigger
diff --git a/package/base-files/files/lib/upgrade/emmc.sh b/package/base-files/files/lib/upgrade/emmc.sh
new file mode 100644
index 0000000..78e398d
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/emmc.sh
@@ -0,0 +1,74 @@
+# Copyright (C) 2021 OpenWrt.org
+#
+
+. /lib/functions.sh
+
+emmc_upgrade_tar() {
+ local tar_file="$1"
+ [ "$CI_KERNPART" -a -z "$EMMC_KERN_DEV" ] && export EMMC_KERN_DEV="$(find_mmc_part $CI_KERNPART $CI_ROOTDEV)"
+ [ "$CI_ROOTPART" -a -z "$EMMC_ROOT_DEV" ] && export EMMC_ROOT_DEV="$(find_mmc_part $CI_ROOTPART $CI_ROOTDEV)"
+ [ "$CI_DATAPART" -a -z "$EMMC_DATA_DEV" ] && export EMMC_DATA_DEV="$(find_mmc_part $CI_DATAPART $CI_ROOTDEV)"
+ local has_kernel
+ local has_rootfs
+ local board_dir=$(tar tf "$tar_file" | grep -m 1 '^sysupgrade-.*/$')
+ board_dir=${board_dir%/}
+
+ tar tf "$tar_file" ${board_dir}/kernel 1>/dev/null 2>/dev/null && has_kernel=1
+ tar tf "$tar_file" ${board_dir}/root 1>/dev/null 2>/dev/null && has_rootfs=1
+
+ [ "$has_rootfs" = 1 -a "$EMMC_ROOT_DEV" ] && {
+ # Invalidate kernel image while rootfs is being written
+ [ "$has_kernel" = 1 -a "$EMMC_KERN_DEV" ] && {
+ dd if=/dev/zero of="$EMMC_KERN_DEV" bs=512 count=8
+ sync
+ }
+
+ export EMMC_ROOTFS_BLOCKS=$(($(tar xf "$tar_file" ${board_dir}/root -O | dd of="$EMMC_ROOT_DEV" bs=512 2>&1 | grep "records out" | cut -d' ' -f1)))
+ # Account for 64KiB ROOTDEV_OVERLAY_ALIGN in libfstools
+ EMMC_ROOTFS_BLOCKS=$(((EMMC_ROOTFS_BLOCKS + 127) & ~127))
+ sync
+ }
+
+ [ "$has_kernel" = 1 -a "$EMMC_KERN_DEV" ] &&
+ export EMMC_KERNEL_BLOCKS=$(($(tar xf "$tar_file" ${board_dir}/kernel -O | dd of="$EMMC_KERN_DEV" bs=512 2>&1 | grep "records out" | cut -d' ' -f1)))
+
+ if [ -z "$UPGRADE_BACKUP" ]; then
+ if [ "$EMMC_DATA_DEV" ]; then
+ dd if=/dev/zero of="$EMMC_DATA_DEV" bs=512 count=8
+ elif [ "$EMMC_ROOTFS_BLOCKS" ]; then
+ dd if=/dev/zero of="$EMMC_ROOT_DEV" bs=512 seek=$EMMC_ROOTFS_BLOCKS count=8
+ elif [ "$EMMC_KERNEL_BLOCKS" ]; then
+ dd if=/dev/zero of="$EMMC_KERN_DEV" bs=512 seek=$EMMC_KERNEL_BLOCKS count=8
+ fi
+ fi
+}
+
+emmc_upgrade_fit() {
+ local fit_file="$1"
+ [ "$CI_KERNPART" -a -z "$EMMC_KERN_DEV" ] && export EMMC_KERN_DEV="$(find_mmc_part $CI_KERNPART $CI_ROOTDEV)"
+
+ if [ "$EMMC_KERN_DEV" ]; then
+ export EMMC_KERNEL_BLOCKS=$(($(get_image "$fit_file" | fwtool -i /dev/null -T - | dd of="$EMMC_KERN_DEV" bs=512 2>&1 | grep "records out" | cut -d' ' -f1)))
+
+ [ -z "$UPGRADE_BACKUP" ] && dd if=/dev/zero of="$EMMC_KERN_DEV" bs=512 seek=$EMMC_KERNEL_BLOCKS count=8
+ fi
+}
+
+emmc_copy_config() {
+ if [ "$EMMC_DATA_DEV" ]; then
+ dd if="$UPGRADE_BACKUP" of="$EMMC_DATA_DEV" bs=512
+ elif [ "$EMMC_ROOTFS_BLOCKS" ]; then
+ dd if="$UPGRADE_BACKUP" of="$EMMC_ROOT_DEV" bs=512 seek=$EMMC_ROOTFS_BLOCKS
+ elif [ "$EMMC_KERNEL_BLOCKS" ]; then
+ dd if="$UPGRADE_BACKUP" of="$EMMC_KERN_DEV" bs=512 seek=$EMMC_KERNEL_BLOCKS
+ fi
+}
+
+emmc_do_upgrade() {
+ local file_type=$(identify_magic_long "$(get_magic_long "$1")")
+
+ case "$file_type" in
+ "fit") emmc_upgrade_fit $1;;
+ *) emmc_upgrade_tar $1;;
+ esac
+}
diff --git a/package/base-files/files/lib/upgrade/fwtool.sh b/package/base-files/files/lib/upgrade/fwtool.sh
new file mode 100644
index 0000000..8bd00a3
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/fwtool.sh
@@ -0,0 +1,93 @@
+fwtool_check_signature() {
+ [ $# -gt 1 ] && return 1
+
+ [ ! -x /usr/bin/ucert ] && {
+ if [ "$REQUIRE_IMAGE_SIGNATURE" = 1 ]; then
+ return 1
+ else
+ return 0
+ fi
+ }
+
+ if ! fwtool -q -s /tmp/sysupgrade.ucert "$1"; then
+ v "Image signature not present"
+ [ "$REQUIRE_IMAGE_SIGNATURE" = 1 -a "$FORCE" != 1 ] && {
+ v "Use sysupgrade -F to override this check when downgrading or flashing to vendor firmware"
+ }
+ [ "$REQUIRE_IMAGE_SIGNATURE" = 1 ] && return 1
+ return 0
+ fi
+
+ fwtool -q -T -s /dev/null "$1" | \
+ ucert -V -m - -c "/tmp/sysupgrade.ucert" -P /etc/opkg/keys
+
+ return $?
+}
+
+fwtool_check_image() {
+ [ $# -gt 1 ] && return 1
+
+ . /usr/share/libubox/jshn.sh
+
+ if ! fwtool -q -i /tmp/sysupgrade.meta "$1"; then
+ v "Image metadata not present"
+ [ "$REQUIRE_IMAGE_METADATA" = 1 -a "$FORCE" != 1 ] && {
+ v "Use sysupgrade -F to override this check when downgrading or flashing to vendor firmware"
+ }
+ [ "$REQUIRE_IMAGE_METADATA" = 1 ] && return 1
+ return 0
+ fi
+
+ json_load "$(cat /tmp/sysupgrade.meta)" || {
+ v "Invalid image metadata"
+ return 1
+ }
+
+ device="$(cat /tmp/sysinfo/board_name)"
+ devicecompat="$(uci -q get system.@system[0].compat_version)"
+ [ -n "$devicecompat" ] || devicecompat="1.0"
+
+ json_get_var imagecompat compat_version
+ json_get_var compatmessage compat_message
+ [ -n "$imagecompat" ] || imagecompat="1.0"
+
+ # select correct supported list based on compat_version
+ # (using this ensures that compatibility check works for devices
+ # not knowing about compat-version)
+ local supported=supported_devices
+ [ "$imagecompat" != "1.0" ] && supported=new_supported_devices
+ json_select $supported || return 1
+
+ json_get_keys dev_keys
+ for k in $dev_keys; do
+ json_get_var dev "$k"
+ if [ "$dev" = "$device" ]; then
+ # major compat version -> no sysupgrade
+ if [ "${devicecompat%.*}" != "${imagecompat%.*}" ]; then
+ v "The device is supported, but this image is incompatible for sysupgrade based on the image version ($devicecompat->$imagecompat)."
+ [ -n "$compatmessage" ] && v "$compatmessage"
+ return 1
+ fi
+
+ # minor compat version -> sysupgrade with -n required
+ if [ "${devicecompat#.*}" != "${imagecompat#.*}" ] && [ "$SAVE_CONFIG" = "1" ]; then
+ [ "$IGNORE_MINOR_COMPAT" = 1 ] && return 0
+ v "The device is supported, but the config is incompatible to the new image ($devicecompat->$imagecompat). Please upgrade without keeping config (sysupgrade -n)."
+ [ -n "$compatmessage" ] && v "$compatmessage"
+ return 1
+ fi
+
+ return 0
+ fi
+ done
+
+ v "Device $device not supported by this image"
+ local devices="Supported devices:"
+ for k in $dev_keys; do
+ json_get_var dev "$k"
+ devices="$devices $dev"
+ done
+ v "$devices"
+
+ return 1
+}
diff --git a/package/base-files/files/lib/upgrade/keep.d/base-files-essential b/package/base-files/files/lib/upgrade/keep.d/base-files-essential
new file mode 100644
index 0000000..7a7a253
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/keep.d/base-files-essential
@@ -0,0 +1,11 @@
+# Essential files that will be always kept
+/etc/hosts
+/etc/inittab
+/etc/group
+/etc/passwd
+/etc/profile
+/etc/shadow
+/etc/shells
+/etc/shinit
+/etc/sysctl.conf
+/etc/rc.local
diff --git a/package/base-files/files/lib/upgrade/legacy-sdcard.sh b/package/base-files/files/lib/upgrade/legacy-sdcard.sh
new file mode 100644
index 0000000..d2ae53b
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/legacy-sdcard.sh
@@ -0,0 +1,91 @@
+legacy_sdcard_check_image() {
+ local file="$1"
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ v "Unable to determine upgrade device"
+ return 1
+ }
+
+ get_partitions "/dev/$diskdev" bootdisk
+
+ v "Extract boot sector from the image"
+ get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b
+
+ get_partitions /tmp/image.bs image
+
+ #compare tables
+ diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+
+ rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
+
+ if [ -n "$diff" ]; then
+ v "Partition layout has changed. Full image will be written."
+ ask_bool 0 "Abort" && exit 1
+ return 0
+ fi
+}
+
+legacy_sdcard_do_upgrade() {
+ local board=$(board_name)
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ v "Unable to determine upgrade device"
+ return 1
+ }
+
+ sync
+
+ if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
+ get_partitions "/dev/$diskdev" bootdisk
+
+ v "Extract boot sector from the image"
+ get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b
+
+ get_partitions /tmp/image.bs image
+
+ #compare tables
+ diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+ else
+ diff=1
+ fi
+
+ if [ -n "$diff" ]; then
+ get_image_dd "$1" of="/dev/$diskdev" bs=4096 conv=fsync
+
+ # Separate removal and addtion is necessary; otherwise, partition 1
+ # will be missing if it overlaps with the old partition 2
+ partx -d - "/dev/$diskdev"
+ partx -a - "/dev/$diskdev"
+ else
+ v "Writing bootloader to /dev/$diskdev"
+ get_image_dd "$1" of="$diskdev" bs=512 skip=1 seek=1 count=2048 conv=fsync
+ #iterate over each partition from the image and write it to the boot disk
+ while read part start size; do
+ if export_partdevice partdev $part; then
+ v "Writing image to /dev/$partdev..."
+ get_image_dd "$1" of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
+ else
+ v "Unable to find partition $part device, skipped."
+ fi
+ done < /tmp/partmap.image
+
+ v "Writing new UUID to /dev/$diskdev..."
+ get_image_dd "$1" of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
+ fi
+
+ sleep 1
+}
+
+legacy_sdcard_copy_config() {
+ local partdev
+
+ if export_partdevice partdev 1; then
+ mkdir -p /boot
+ [ -f /boot/kernel.img ] || mount -o rw,noatime /dev/$partdev /boot
+ cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE"
+ sync
+ umount /boot
+ fi
+}
diff --git a/package/base-files/files/lib/upgrade/nand.sh b/package/base-files/files/lib/upgrade/nand.sh
new file mode 100644
index 0000000..ca30255
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/nand.sh
@@ -0,0 +1,499 @@
+# Copyright (C) 2014 OpenWrt.org
+#
+
+. /lib/functions.sh
+
+# 'kernel' partition or UBI volume on NAND contains the kernel
+CI_KERNPART="${CI_KERNPART:-kernel}"
+
+# 'ubi' partition on NAND contains UBI
+# There are also CI_KERN_UBIPART and CI_ROOT_UBIPART if kernel
+# and rootfs are on separated UBIs.
+CI_UBIPART="${CI_UBIPART:-ubi}"
+
+# 'rootfs' UBI volume on NAND contains the rootfs
+CI_ROOTPART="${CI_ROOTPART:-rootfs}"
+
+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 $minor
+}
+
+nand_find_volume() {
+ local ubidevdir ubivoldir
+ ubidevdir="/sys/class/ubi/"
+ [ ! -d "$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 cmtdnum
+ mtdnum="$( find_mtd_index $1 )"
+ [ ! "$mtdnum" ] && return 1
+ for ubidevdir in /sys/class/ubi/ubi*; do
+ [ ! -e "$ubidevdir/mtd_num" ] && continue
+ cmtdnum="$( cat $ubidevdir/mtd_num )"
+ if [ "$mtdnum" = "$cmtdnum" ]; then
+ ubidev=$( basename $ubidevdir )
+ ubi_mknod "$ubidevdir"
+ echo $ubidev
+ return 0
+ fi
+ done
+}
+
+nand_get_magic_long() {
+ ($2 < "$1" | dd bs=4 "skip=${3:-0}" count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
+}
+
+get_magic_long_tar() {
+ ($2 < "$1" | tar xOf - "$3" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
+}
+
+identify() {
+ identify_magic_long $(nand_get_magic_long "$@")
+}
+
+identify_tar() {
+ identify_magic_long $(get_magic_long_tar "$@")
+}
+
+identify_if_gzip() {
+ if [ "$(identify "$1" "cat")" = gzip ]; then echo -n z; fi
+}
+
+nand_restore_config() {
+ local ubidev=$( nand_find_ubi "${CI_ROOT_UBIPART:-$CI_UBIPART}" )
+ local ubivol="$( nand_find_volume $ubidev rootfs_data )"
+ if [ ! "$ubivol" ]; then
+ ubivol="$( nand_find_volume $ubidev "$CI_ROOTPART" )"
+ if [ ! "$ubivol" ]; then
+ echo "cannot find ubifs data volume"
+ return 1
+ fi
+ fi
+ mkdir /tmp/new_root
+ if ! mount -t ubifs /dev/$ubivol /tmp/new_root; then
+ echo "cannot mount ubifs volume $ubivol"
+ rmdir /tmp/new_root
+ return 1
+ fi
+ if mv "$1" "/tmp/new_root/$BACKUP_FILE"; then
+ if umount /tmp/new_root; then
+ echo "configuration saved"
+ rmdir /tmp/new_root
+ return 0
+ fi
+ else
+ umount /tmp/new_root
+ fi
+ echo "could not save configuration to ubifs volume $ubivol"
+ rmdir /tmp/new_root
+ return 1
+}
+
+nand_remove_ubiblock() {
+ local ubivol="$1"
+
+ local ubiblk="ubiblock${ubivol:3}"
+ if [ -e "/dev/$ubiblk" ]; then
+ umount "/dev/$ubiblk" 2>/dev/null && echo "unmounted /dev/$ubiblk" || :
+ if ! ubiblock -r "/dev/$ubivol"; then
+ echo "cannot remove $ubiblk"
+ return 1
+ fi
+ fi
+}
+
+nand_attach_ubi() {
+ local ubipart="$1"
+ local has_env="${2:-0}"
+
+ local mtdnum="$( find_mtd_index "$ubipart" )"
+ if [ ! "$mtdnum" ]; then
+ >&2 echo "cannot find ubi mtd partition $ubipart"
+ return 1
+ fi
+
+ local ubidev="$( nand_find_ubi "$ubipart" )"
+ if [ ! "$ubidev" ]; then
+ >&2 ubiattach -m "$mtdnum"
+ ubidev="$( nand_find_ubi "$ubipart" )"
+
+ if [ ! "$ubidev" ]; then
+ >&2 ubiformat /dev/mtd$mtdnum -y
+ >&2 ubiattach -m "$mtdnum"
+ ubidev="$( nand_find_ubi "$ubipart" )"
+
+ if [ ! "$ubidev" ]; then
+ >&2 echo "cannot attach ubi mtd partition $ubipart"
+ return 1
+ fi
+
+ if [ "$has_env" -gt 0 ]; then
+ >&2 ubimkvol /dev/$ubidev -n 0 -N ubootenv -s 1MiB
+ >&2 ubimkvol /dev/$ubidev -n 1 -N ubootenv2 -s 1MiB
+ fi
+ fi
+ fi
+
+ echo "$ubidev"
+ return 0
+}
+
+nand_detach_ubi() {
+ local ubipart="$1"
+
+ local mtdnum="$( find_mtd_index "$ubipart" )"
+ if [ ! "$mtdnum" ]; then
+ echo "cannot find ubi mtd partition $ubipart"
+ return 1
+ fi
+
+ local ubidev="$( nand_find_ubi "$ubipart" )"
+ if [ "$ubidev" ]; then
+ for ubivol in $(find /dev -name "${ubidev}_*" -maxdepth 1 | sort); do
+ ubivol="${ubivol:5}"
+ nand_remove_ubiblock "$ubivol" || :
+ umount "/dev/$ubivol" && echo "unmounted /dev/$ubivol" || :
+ done
+ if ! ubidetach -m "$mtdnum"; then
+ echo "cannot detach ubi mtd partition $ubipart"
+ return 1
+ fi
+ fi
+}
+
+nand_upgrade_prepare_ubi() {
+ local rootfs_length="$1"
+ local rootfs_type="$2"
+ local rootfs_data_max="$(fw_printenv -n rootfs_data_max 2> /dev/null)"
+ [ -n "$rootfs_data_max" ] && rootfs_data_max=$((rootfs_data_max))
+
+ local kernel_length="$3"
+ local has_env="${4:-0}"
+ local kern_ubidev
+ local root_ubidev
+
+ [ -n "$rootfs_length" -o -n "$kernel_length" ] || return 1
+
+ if [ -n "$CI_KERN_UBIPART" -a -n "$CI_ROOT_UBIPART" ]; then
+ kern_ubidev="$( nand_attach_ubi "$CI_KERN_UBIPART" "$has_env" )"
+ [ -n "$kern_ubidev" ] || return 1
+ root_ubidev="$( nand_attach_ubi "$CI_ROOT_UBIPART" )"
+ [ -n "$root_ubidev" ] || return 1
+ else
+ kern_ubidev="$( nand_attach_ubi "$CI_UBIPART" "$has_env" )"
+ [ -n "$kern_ubidev" ] || return 1
+ root_ubidev="$kern_ubidev"
+ fi
+
+ local kern_ubivol="$( nand_find_volume $kern_ubidev "$CI_KERNPART" )"
+ local root_ubivol="$( nand_find_volume $root_ubidev "$CI_ROOTPART" )"
+ local data_ubivol="$( nand_find_volume $root_ubidev rootfs_data )"
+ [ "$root_ubivol" = "$kern_ubivol" ] && root_ubivol=
+
+ # remove ubiblocks
+ [ "$kern_ubivol" ] && { nand_remove_ubiblock $kern_ubivol || return 1; }
+ [ "$root_ubivol" ] && { nand_remove_ubiblock $root_ubivol || return 1; }
+ [ "$data_ubivol" ] && { nand_remove_ubiblock $data_ubivol || return 1; }
+
+ # kill volumes
+ [ "$kern_ubivol" ] && ubirmvol /dev/$kern_ubidev -N "$CI_KERNPART" || :
+ [ "$root_ubivol" ] && ubirmvol /dev/$root_ubidev -N "$CI_ROOTPART" || :
+ [ "$data_ubivol" ] && ubirmvol /dev/$root_ubidev -N rootfs_data || :
+
+ # create kernel vol
+ if [ -n "$kernel_length" ]; then
+ if ! ubimkvol /dev/$kern_ubidev -N "$CI_KERNPART" -s $kernel_length; then
+ echo "cannot create kernel volume"
+ return 1;
+ fi
+ fi
+
+ # create rootfs vol
+ if [ -n "$rootfs_length" ]; then
+ local rootfs_size_param
+ if [ "$rootfs_type" = "ubifs" ]; then
+ rootfs_size_param="-m"
+ else
+ rootfs_size_param="-s $rootfs_length"
+ fi
+ if ! ubimkvol /dev/$root_ubidev -N "$CI_ROOTPART" $rootfs_size_param; then
+ echo "cannot create rootfs volume"
+ return 1;
+ fi
+ fi
+
+ # create rootfs_data vol for non-ubifs rootfs
+ if [ "$rootfs_type" != "ubifs" ]; then
+ local rootfs_data_size_param="-m"
+ if [ -n "$rootfs_data_max" ]; then
+ rootfs_data_size_param="-s $rootfs_data_max"
+ fi
+ if ! ubimkvol /dev/$root_ubidev -N rootfs_data $rootfs_data_size_param; then
+ if ! ubimkvol /dev/$root_ubidev -N rootfs_data -m; then
+ echo "cannot initialize rootfs_data volume"
+ return 1
+ fi
+ fi
+ fi
+
+ return 0
+}
+
+# Write the UBI image to MTD ubi partition
+nand_upgrade_ubinized() {
+ local ubi_file="$1"
+ local cmd="$2"
+
+ local ubi_length=$( ($cmd < "$ubi_file" | wc -c) 2> /dev/null)
+
+ nand_detach_ubi "$CI_UBIPART" || return 1
+
+ local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
+ $cmd < "$ubi_file" | ubiformat "/dev/mtd$mtdnum" -S "$ubi_length" -y -f - && ubiattach -m "$mtdnum"
+}
+
+# Write the UBIFS image to UBI rootfs volume
+nand_upgrade_ubifs() {
+ local ubifs_file="$1"
+ local cmd="$2"
+
+ local ubifs_length=$( ($cmd < "$ubifs_file" | wc -c) 2> /dev/null)
+
+ nand_upgrade_prepare_ubi "$ubifs_length" "ubifs" "" "" || return 1
+
+ local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+ local root_ubivol="$(nand_find_volume $ubidev "$CI_ROOTPART")"
+ $cmd < "$ubifs_file" | ubiupdatevol /dev/$root_ubivol -s "$ubifs_length" -
+}
+
+# Write the FIT image to UBI kernel volume
+nand_upgrade_fit() {
+ local fit_file="$1"
+ local cmd="$2"
+
+ local fit_length=$( ($cmd < "$fit_file" | wc -c) 2> /dev/null)
+
+ nand_upgrade_prepare_ubi "" "" "$fit_length" "1" || return 1
+
+ local fit_ubidev="$(nand_find_ubi "$CI_UBIPART")"
+ local fit_ubivol="$(nand_find_volume $fit_ubidev "$CI_KERNPART")"
+ $cmd < "$fit_file" | ubiupdatevol /dev/$fit_ubivol -s "$fit_length" -
+}
+
+# Write images in the TAR file to MTD partitions and/or UBI volumes as required
+nand_upgrade_tar() {
+ local tar_file="$1"
+ local cmd="${2:-cat}"
+ local jffs2_markers="${CI_JFFS2_CLEAN_MARKERS:-0}"
+
+ # WARNING: This fails if tar contains more than one 'sysupgrade-*' directory.
+ local board_dir="$($cmd < "$tar_file" | tar tf - | grep -m 1 '^sysupgrade-.*/$')"
+ board_dir="${board_dir%/}"
+
+ local kernel_mtd kernel_length
+ if [ "$CI_KERNPART" != "none" ]; then
+ kernel_mtd="$(find_mtd_index "$CI_KERNPART")"
+ kernel_length=$( ($cmd < "$tar_file" | tar xOf - "$board_dir/kernel" | wc -c) 2> /dev/null)
+ [ "$kernel_length" = 0 ] && kernel_length=
+ fi
+ local rootfs_length=$( ($cmd < "$tar_file" | tar xOf - "$board_dir/root" | wc -c) 2> /dev/null)
+ [ "$rootfs_length" = 0 ] && rootfs_length=
+ local rootfs_type
+ [ "$rootfs_length" ] && rootfs_type="$(identify_tar "$tar_file" "$cmd" "$board_dir/root")"
+
+ local ubi_kernel_length
+ if [ "$kernel_length" ]; then
+ if [ "$kernel_mtd" ]; then
+ # On some devices, the raw kernel and ubi partitions overlap.
+ # These devices brick if the kernel partition is erased.
+ # Hence only invalidate kernel for now.
+ dd if=/dev/zero bs=4096 count=1 2> /dev/null | \
+ mtd write - "$CI_KERNPART"
+ else
+ ubi_kernel_length="$kernel_length"
+ fi
+ fi
+
+ local has_env=0
+ nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "$ubi_kernel_length" "$has_env" || return 1
+
+ if [ "$rootfs_length" ]; then
+ local ubidev="$( nand_find_ubi "${CI_ROOT_UBIPART:-$CI_UBIPART}" )"
+ local root_ubivol="$( nand_find_volume $ubidev "$CI_ROOTPART" )"
+ $cmd < "$tar_file" | tar xOf - "$board_dir/root" | \
+ ubiupdatevol /dev/$root_ubivol -s "$rootfs_length" -
+ fi
+ if [ "$kernel_length" ]; then
+ if [ "$kernel_mtd" ]; then
+ if [ "$jffs2_markers" = 1 ]; then
+ flash_erase -j "/dev/mtd${kernel_mtd}" 0 0
+ $cmd < "$tar_file" | tar xOf - "$board_dir/kernel" | \
+ nandwrite "/dev/mtd${kernel_mtd}" -
+ else
+ $cmd < "$tar_file" | tar xOf - "$board_dir/kernel" | \
+ mtd write - "$CI_KERNPART"
+ fi
+ else
+ local ubidev="$( nand_find_ubi "${CI_KERN_UBIPART:-$CI_UBIPART}" )"
+ local kern_ubivol="$( nand_find_volume $ubidev "$CI_KERNPART" )"
+ $cmd < "$tar_file" | tar xOf - "$board_dir/kernel" | \
+ ubiupdatevol /dev/$kern_ubivol -s "$kernel_length" -
+ fi
+ fi
+
+ return 0
+}
+
+nand_verify_if_gzip_file() {
+ local file="$1"
+ local cmd="$2"
+
+ if [ "$cmd" = zcat ]; then
+ echo "verifying compressed sysupgrade file integrity"
+ if ! gzip -t "$file"; then
+ echo "corrupted compressed sysupgrade file"
+ return 1
+ fi
+ fi
+}
+
+nand_verify_tar_file() {
+ local file="$1"
+ local cmd="$2"
+
+ echo "verifying sysupgrade tar file integrity"
+ if ! $cmd < "$file" | tar xOf - > /dev/null; then
+ echo "corrupted sysupgrade tar file"
+ return 1
+ fi
+}
+
+nand_do_flash_file() {
+ local file="$1"
+ local cmd="$2"
+ local file_type
+
+ [ -z "$cmd" ] && cmd="$(identify_if_gzip "$file")cat"
+ file_type="$(identify "$file" "$cmd" "")"
+
+ [ ! "$(find_mtd_index "$CI_UBIPART")" ] && CI_UBIPART=rootfs
+
+ case "$file_type" in
+ "fit")
+ nand_verify_if_gzip_file "$file" "$cmd" || return 1
+ nand_upgrade_fit "$file" "$cmd"
+ ;;
+ "ubi")
+ nand_verify_if_gzip_file "$file" "$cmd" || return 1
+ nand_upgrade_ubinized "$file" "$cmd"
+ ;;
+ "ubifs")
+ nand_verify_if_gzip_file "$file" "$cmd" || return 1
+ nand_upgrade_ubifs "$file" "$cmd"
+ ;;
+ *)
+ nand_verify_tar_file "$file" "$cmd" || return 1
+ nand_upgrade_tar "$file" "$cmd"
+ ;;
+ esac
+}
+
+nand_do_restore_config() {
+ local conf_tar="/tmp/sysupgrade.tgz"
+ [ ! -f "$conf_tar" ] || nand_restore_config "$conf_tar"
+}
+
+# Recognize type of passed file and start the upgrade process
+#
+# Supported firmware containers:
+# 1. Raw file
+# 2. Gzip
+# 3. Custom (requires passing extracting command)
+#
+# Supported data formats:
+# 1. Tar with kernel/rootfs
+# 2. UBI image (built using "ubinized")
+# 3. UBIFS image (to update UBI volume with)
+# 4. FIT image (to update UBI volume with)
+#
+# $(1): firmware file path
+# $(2): (optional) pipe command to extract firmware
+nand_do_upgrade() {
+ local file="$1"
+ local cmd="$2"
+
+ sync
+ nand_do_flash_file "$file" "$cmd" && nand_do_upgrade_success
+ nand_do_upgrade_failed
+}
+
+nand_do_upgrade_success() {
+ if nand_do_restore_config && sync; then
+ echo "sysupgrade successful"
+ umount -a
+ reboot -f
+ fi
+ nand_do_upgrade_failed
+}
+
+nand_do_upgrade_failed() {
+ sync
+ echo "sysupgrade failed"
+ # Should we reboot or bring up some failsafe mode instead?
+ umount -a
+ reboot -f
+}
+
+# Check if passed file is a valid one for NAND sysupgrade.
+# Currently it accepts 4 types of files:
+# 1) UBI: a ubinized image containing required UBI volumes.
+# 2) UBIFS: a UBIFS rootfs volume image.
+# 3) FIT: a FIT image containing kernel and rootfs.
+# 4) TAR: an archive that includes directory "sysupgrade-${BOARD_NAME}" containing
+# a non-empty "CONTROL" file and required partition and/or volume images.
+#
+# 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 file="$2"
+
+ local cmd="$(identify_if_gzip "$file")cat"
+ local file_type="$(identify "$file" "$cmd" "")"
+ local control_length=$( ($cmd < "$file" | tar xOf - "sysupgrade-${board_name//,/_}/CONTROL" | wc -c) 2> /dev/null)
+
+ if [ "$control_length" = 0 ]; then
+ control_length=$( ($cmd < "$file" | tar xOf - "sysupgrade-${board_name//_/,}/CONTROL" | wc -c) 2> /dev/null)
+ fi
+
+ if [ "$control_length" != 0 ]; then
+ nand_verify_tar_file "$file" "$cmd" || return 1
+ else
+ nand_verify_if_gzip_file "$file" "$cmd" || return 1
+ if [ "$file_type" != "fit" -a "$file_type" != "ubi" -a "$file_type" != "ubifs" ]; then
+ echo "invalid sysupgrade file"
+ return 1
+ fi
+ fi
+
+ return 0
+}
diff --git a/package/base-files/files/lib/upgrade/stage2 b/package/base-files/files/lib/upgrade/stage2
new file mode 100755
index 0000000..5ce0b35
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/stage2
@@ -0,0 +1,175 @@
+#!/bin/sh
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+
+export IMAGE="$1"
+COMMAND="$2"
+
+export INTERACTIVE=0
+export VERBOSE=1
+export CONFFILES=/tmp/sysupgrade.conffiles
+
+RAMFS_COPY_BIN= # extra programs for temporary ramfs root
+RAMFS_COPY_DATA= # extra data files
+
+include /lib/upgrade
+
+
+supivot() { # <new_root> <old_root>
+ /bin/mount | grep "on $1 type" 2>&- 1>&- || /bin/mount -o bind $1 $1
+ mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
+ /bin/mount -o noatime,move /proc $1/proc && \
+ pivot_root $1 $1$2 || {
+ /bin/umount -l $1 $1
+ return 1
+ }
+
+ /bin/mount -o noatime,move $2/sys /sys
+ /bin/mount -o noatime,move $2/dev /dev
+ /bin/mount -o noatime,move $2/tmp /tmp
+ /bin/mount -o noatime,move $2/overlay /overlay 2>&-
+ return 0
+}
+
+switch_to_ramfs() {
+ RAMFS_COPY_LOSETUP="$(command -v /usr/sbin/losetup)"
+ RAMFS_COPY_LVM="$(command -v lvm)"
+
+ for binary in \
+ /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount \
+ pivot_root mount_root reboot sync kill sleep \
+ md5sum hexdump cat zcat dd tar gzip \
+ ls basename find cp mv rm mkdir rmdir mknod touch chmod \
+ '[' printf wc grep awk sed cut sort tail \
+ mtd partx losetup mkfs.ext4 nandwrite flash_erase \
+ ubiupdatevol ubiattach ubiblock ubiformat \
+ ubidetach ubirsvol ubirmvol ubimkvol \
+ snapshot snapshot_tool date logger \
+ /usr/sbin/fw_printenv /usr/bin/fwtool \
+ $RAMFS_COPY_LOSETUP $RAMFS_COPY_LVM \
+ $RAMFS_COPY_BIN
+ do
+ local file="$(command -v "$binary" 2>/dev/null)"
+ [ -n "$file" ] && install_bin "$file"
+ done
+ install_file /etc/resolv.conf /lib/*.sh /lib/functions/*.sh \
+ /lib/upgrade/*.sh /lib/upgrade/do_stage2 \
+ /usr/share/libubox/jshn.sh /usr/sbin/fw_setenv \
+ /etc/fw_env.config $RAMFS_COPY_DATA
+
+ mkdir -p $RAM_ROOT/var/lock
+
+ [ -L "/lib64" ] && ln -s /lib $RAM_ROOT/lib64
+
+ supivot $RAM_ROOT /mnt || {
+ v "Failed to switch over to ramfs. Please reboot."
+ exit 1
+ }
+
+ /bin/mount -o remount,ro /mnt
+ /bin/umount -l /mnt
+
+ grep -e "^/dev/dm-.*" -e "^/dev/loop.*" /proc/mounts | while read bdev mp _r; do
+ umount $mp
+ done
+
+ [ "$RAMFS_COPY_LOSETUP" ] && losetup -D
+ [ "$RAMFS_COPY_LVM" ] && {
+ mkdir -p /tmp/lvm/cache
+ $RAMFS_COPY_LVM vgchange -aln --ignorelockingfailure
+ }
+
+ grep /overlay /proc/mounts > /dev/null && {
+ /bin/mount -o noatime,remount,ro /overlay
+ /bin/umount -l /overlay
+ }
+}
+
+kill_remaining() { # [ <signal> [ <loop> ] ]
+ local loop_limit=10
+
+ local sig="${1:-TERM}"
+ local loop="${2:-0}"
+ local run=true
+ local stat
+ local proc_ppid=$(cut -d' ' -f4 /proc/$$/stat)
+
+ v "Sending $sig to remaining processes ..."
+
+ while $run; do
+ run=false
+ for stat in /proc/[0-9]*/stat; do
+ [ -f "$stat" ] || continue
+
+ local pid name state ppid rest
+ read pid rest < $stat
+ name="${rest#\(}" ; rest="${name##*\) }" ; name="${name%\)*}"
+ set -- $rest ; state="$1" ; ppid="$2"
+
+ # Skip PID1, our parent, ourself and our children
+ [ $pid -ne 1 -a $pid -ne $proc_ppid -a $pid -ne $$ -a $ppid -ne $$ ] || continue
+
+ [ -f "/proc/$pid/cmdline" ] || continue
+
+ local cmdline
+ read cmdline < /proc/$pid/cmdline
+
+ # Skip kernel threads
+ [ -n "$cmdline" ] || continue
+
+ v "Sending signal $sig to $name ($pid)"
+ kill -$sig $pid 2>/dev/null
+
+ [ $loop -eq 1 ] && sleep 2 && run=true
+ done
+
+ let loop_limit--
+ [ $loop_limit -eq 0 ] && {
+ v "Failed to kill all processes."
+ exit 1
+ }
+ done
+}
+
+indicate_upgrade
+
+while read -r a b c; do
+ case "$a" in
+ MemT*) mem="$b" ;; esac
+done < /proc/meminfo
+
+[ "$mem" -gt 32768 ] && \
+ skip_services="dnsmasq log network"
+for service in /etc/init.d/*; do
+ service=${service##*/}
+
+ case " $skip_services " in
+ *" $service "*) continue ;; esac
+
+ ubus call service delete '{ "name": "'"$service"'" }' 2>/dev/null
+done
+
+killall -9 telnetd 2>/dev/null
+killall -9 dropbear 2>/dev/null
+killall -9 ash 2>/dev/null
+
+kill_remaining TERM
+sleep 4
+kill_remaining KILL 1
+
+sleep 6
+
+echo 3 > /proc/sys/vm/drop_caches
+
+if [ -n "$IMAGE" ] && type 'platform_pre_upgrade' >/dev/null 2>/dev/null; then
+ platform_pre_upgrade "$IMAGE"
+fi
+
+if [ -n "$(rootfs_type)" ]; then
+ v "Switching to ramdisk..."
+ switch_to_ramfs
+fi
+
+# Exec new shell from ramfs
+exec /bin/busybox ash -c "$COMMAND"
diff --git a/package/base-files/files/lib/upgrade/tar.sh b/package/base-files/files/lib/upgrade/tar.sh
new file mode 100644
index 0000000..a9d1d55
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/tar.sh
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+# Example usage:
+#
+# {
+# tar_print_member "date.txt" "It's $(date +"%Y")"
+# tar_print_trailer
+# } > test.tar
+
+__tar_print_padding() {
+ dd if=/dev/zero bs=1 count=$1 2>/dev/null
+}
+
+tar_print_member() {
+ local name="$1"
+ local content="$2"
+ local mtime="${3:-$(date +%s)}"
+ local mode=644
+ local uid=0
+ local gid=0
+ local size=${#content}
+ local type=0
+ local link=""
+ local username="root"
+ local groupname="root"
+
+ # 100 byte of padding bytes, using 0x01 since the shell does not tolerate null bytes in strings
+ local pad=$'\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1'
+
+ # validate name (strip leading slash if present)
+ name=${name#/}
+
+ # truncate string header values to their maximum length
+ name=${name:0:100}
+ link=${link:0:100}
+ username=${username:0:32}
+ groupname=${groupname:0:32}
+
+ # construct header part before checksum field
+ local header1="${name}${pad:0:$((100 - ${#name}))}"
+ header1="${header1}$(printf '%07d\1' $mode)"
+ header1="${header1}$(printf '%07o\1' $uid)"
+ header1="${header1}$(printf '%07o\1' $gid)"
+ header1="${header1}$(printf '%011o\1' $size)"
+ header1="${header1}$(printf '%011o\1' $mtime)"
+
+ # construct header part after checksum field
+ local header2="$(printf '%d' $type)"
+ header2="${header2}${link}${pad:0:$((100 - ${#link}))}"
+ header2="${header2}ustar ${pad:0:1}"
+ header2="${header2}${username}${pad:0:$((32 - ${#username}))}"
+ header2="${header2}${groupname}${pad:0:$((32 - ${#groupname}))}"
+
+ # calculate checksum over header fields
+ local checksum=0
+ for byte in $(printf '%s%8s%s' "$header1" "" "$header2" | tr '\1' '\0' | hexdump -ve '1/1 "%u "'); do
+ checksum=$((checksum + byte))
+ done
+
+ # print member header, padded to 512 byte
+ printf '%s%06o\0 %s' "$header1" $checksum "$header2" | tr '\1' '\0'
+ __tar_print_padding 183
+
+ # print content data, padded to multiple of 512 byte
+ printf "%s" "$content"
+ __tar_print_padding $((512 - (size % 512)))
+}
+
+tar_print_trailer() {
+ __tar_print_padding 1024
+}