sunxi: sysupgrade: sync with x86
[openwrt/openwrt.git] / target / linux / sunxi / base-files / lib / upgrade / platform.sh
1 platform_check_image() {
2 local diskdev partdev diff
3
4 export_bootdevice && export_partdevice diskdev -2 || {
5 echo "Unable to determine upgrade device"
6 return 1
7 }
8
9 get_partitions "/dev/$diskdev" bootdisk
10
11 #extract the boot sector from the image
12 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
13
14 get_partitions /tmp/image.bs image
15
16 #compare tables
17 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
18
19 rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
20
21 if [ -n "$diff" ]; then
22 echo "Partition layout has changed. Full image will be written."
23 ask_bool 0 "Abort" && exit 1
24 return 0
25 fi
26 }
27
28 platform_copy_config() {
29 local partdev
30
31 if export_partdevice partdev -1; then
32 mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
33 cp -af "$CONF_TAR" /mnt/
34 umount /mnt
35 fi
36 }
37
38 platform_do_upgrade() {
39 local diskdev partdev diff
40
41 export_bootdevice && export_partdevice diskdev -2 || {
42 echo "Unable to determine upgrade device"
43 return 1
44 }
45
46 sync
47
48 if [ "$SAVE_PARTITIONS" = "1" ]; then
49 get_partitions "/dev/$diskdev" bootdisk
50
51 #extract the boot sector from the image
52 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
53
54 get_partitions /tmp/image.bs image
55
56 #compare tables
57 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
58 else
59 diff=1
60 fi
61
62 if [ -n "$diff" ]; then
63 get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
64
65 # Separate removal and addtion is necessary; otherwise, partition 1
66 # will be missing if it overlaps with the old partition 2
67 partx -d - "/dev/$diskdev"
68 partx -a - "/dev/$diskdev"
69
70 return 0
71 fi
72
73 #write uboot image
74 get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 count=1016 conv=fsync
75 #iterate over each partition from the image and write it to the boot disk
76 while read part start size; do
77 part="$(($part - 2))"
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 }