target/linux/tegra/base-files/lib/upgrade/platform.sh

   1 REQUIRE_IMAGE_METADATA=1
   2
   3 platform_check_image() {
   4         local diskdev partdev diff
   5
   6         [ "$#" -gt 1 ] && return 1
   7
   8         export_bootdevice && export_partdevice diskdev 0 || {
   9                 echo "Unable to determine upgrade device"
  10                 return 1
  11         }
  12
  13         get_partitions "/dev/$diskdev" bootdisk
  14
  15         #extract the boot sector from the image
  16         get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b
  17
  18         get_partitions /tmp/image.bs image
  19
  20         #compare tables
  21         diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  22
  23         rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
  24
  25         if [ -n "$diff" ]; then
  26                 echo "Partition layout has changed. Full image will be written."
  27                 ask_bool 0 "Abort" && exit 1
  28                 return 0
  29         fi
  30 }
  31
  32 platform_copy_config() {
  33         local partdev
  34
  35         if export_partdevice partdev 1; then
  36                 mount -o rw,noatime "/dev/$partdev" /mnt
  37                 cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
  38                 umount /mnt
  39         fi
  40 }
  41
  42 platform_do_upgrade() {
  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 "$1" of=/tmp/image.bs count=1 bs=512b
  57
  58                 get_partitions /tmp/image.bs image
  59
  60                 #compare tables
  61                 diff="$(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 "$1" of="/dev/$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
  74                 return 0
  75         fi
  76
  77         #write uboot image
  78         get_image_dd "$1" of="$diskdev" bs=512 skip=1 seek=1 count=4097 conv=fsync,notrunc
  79         #iterate over each partition from the image and write it to the boot disk
  80         while read part start size; do
  81                 if export_partdevice partdev $part; then
  82                         echo "Writing image to /dev/$partdev..."
  83                         get_image_dd "$1" of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
  84                 else
  85                         echo "Unable to find partition $part device, skipped."
  86                 fi
  87         done < /tmp/partmap.image
  88
  89         #copy partition uuid
  90         echo "Writing new UUID to /dev/$diskdev..."
  91         get_image_dd "$1" of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
  92 }