target/linux/mvebu/base-files/lib/upgrade/sdcard.sh

   1 get_magic_at() {
   2         local file="$1"
   3         local pos="$2"
   4         get_image "$file" | dd bs=1 count=2 skip="$pos" 2>/dev/null | hexdump -v -n 2 -e '1/1 "%02x"'
   5 }
   6
   7 platform_check_image_sdcard() {
   8         local file="$1"
   9         local magic diskdev partdev diff
  10
  11         magic=$(get_magic_at "$file" 510)
  12         [ "$magic" != "55aa" ] && {
  13                 echo "Failed to verify MBR boot signature."
  14                 return 1
  15         }
  16
  17         export_bootdevice && export_partdevice diskdev 0 || {
  18                 echo "Unable to determine upgrade device"
  19         return 1
  20         }
  21
  22         get_partitions "/dev/$diskdev" bootdisk
  23
  24         #extract the boot sector from the image
  25         get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
  26
  27         get_partitions /tmp/image.bs image
  28
  29         #compare tables
  30         diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  31
  32         rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
  33
  34         if [ -n "$diff" ]; then
  35                 echo "Partition layout has changed. Full image will be written."
  36                 ask_bool 0 "Abort" && exit 1
  37                 return 0
  38         fi
  39 }
  40
  41 platform_do_upgrade_sdcard() {
  42         local board=$(board_name)
  43         local diskdev partdev diff
  44
  45         export_bootdevice && export_partdevice diskdev 0 || {
  46                 echo "Unable to determine upgrade device"
  47         return 1
  48         }
  49
  50         sync
  51
  52         if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
  53                 get_partitions "/dev/$diskdev" bootdisk
  54
  55                 #extract the boot sector from the image
  56                 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
  57
  58                 get_partitions /tmp/image.bs image
  59
  60                 #compare tables
  61                 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  62         else
  63                 diff=1
  64         fi
  65
  66         if [ -n "$diff" ]; then
  67                 get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
  68
  69                 # Separate removal and addtion is necessary; otherwise, partition 1
  70                 # will be missing if it overlaps with the old partition 2
  71                 partx -d - "/dev/$diskdev"
  72                 partx -a - "/dev/$diskdev"
  73         else
  74                 #write uboot image
  75                 get_image "$@" | dd of="$diskdev" bs=512 skip=1 seek=1 count=2048 conv=fsync
  76                 #iterate over each partition from the image and write it to the boot disk
  77                 while read part start size; do
  78                         if export_partdevice partdev $part; then
  79                                 echo "Writing image to /dev/$partdev..."
  80                                 get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
  81                         else
  82                                 echo "Unable to find partition $part device, skipped."
  83                         fi
  84                 done < /tmp/partmap.image
  85
  86                 #copy partition uuid
  87                 echo "Writing new UUID to /dev/$diskdev..."
  88                 get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
  89         fi
  90
  91         case "$board" in
  92         cznic,turris-omnia)
  93                 fw_setenv openwrt_bootargs 'earlyprintk console=ttyS0,115200 root=/dev/mmcblk0p2 rootfstype=auto rootwait'
  94                 fw_setenv openwrt_mmcload 'setenv bootargs "$openwrt_bootargs cfg80211.freg=$regdomain"; fatload mmc 0 0x01000000 zImage; fatload mmc 0 0x02000000 armada-385-turris-omnia.dtb'
  95                 fw_setenv factory_mmcload 'setenv bootargs "$bootargs cfg80211.freg=$regdomain"; btrload mmc 0 0x01000000 boot/zImage @; btrload mmc 0 0x02000000 boot/dtb @'
  96                 fw_setenv mmcboot 'run openwrt_mmcload || run factory_mmcload; bootz 0x01000000 - 0x02000000'
  97                 ;;
  98         esac
  99
 100         sleep 1
 101 }
 102
 103 platform_copy_config_sdcard() {
 104         local partdev
 105
 106         if export_partdevice partdev 1; then
 107                 mkdir -p /boot
 108                 [ -f /boot/kernel.img ] || mount -o rw,noatime /dev/$partdev /boot
 109                 cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE"
 110                 sync
 111                 umount /boot
 112         fi
 113 }