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Avoid moving data to same device (#2412)

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* Avoid moving data to same device

When a data disk move is triggered when the data disk is already in use
the script currently renames that only data disk, rendering the system
unusable.

Don't continue if source and destination happens to be the same device.

* On failure rename to hassos-data-fail

The label hassos-data-failed is too long.
This commit is contained in:
Stefan Agner 2023-03-15 22:47:31 +01:00 committed by GitHub
parent c8438faab5
commit 787fc22f83
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1 changed files with 8 additions and 2 deletions
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10
buildroot-external/rootfs-overlay/usr/libexec/hassos-data
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@ -20,10 +20,16 @@ fi
# Rely on systemd-udev symlinks to find external data partition by partlabel
NEW_DEVICE_CHILD="$(readlink -f "/dev/disk/by-partlabel/hassos-data-external")"
# Check if target device is the current device
if [ "${NEW_DEVICE_CHILD}" = "${OLD_DEVICE_CHILD}" ]; then
echo "[ERROR] Home Assitant OS is already using this external data device!"
exit 1
fi
NEW_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${NEW_DEVICE_CHILD}")/size")
OLD_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${OLD_DEVICE_CHILD}")/size")
if [ "${NEW_DEVICE_PART_SIZE}" -lt "${OLD_DEVICE_PART_SIZE}" ]; then
echo "[INFO] Target device too small!"
echo "[ERROR] Target device too small!"
exit 1
fi
@ -31,7 +37,7 @@ echo "[INFO] Moving data from ${OLD_DEVICE_CHILD} to ${NEW_DEVICE_CHILD}"
if ! e2image -ra -p "${OLD_DEVICE_CHILD}" "${NEW_DEVICE_CHILD}"; then
echo "[ERROR] Copying data partition to external device failed!"
# Rename partition to make sure HAOS does not try to mount a failed copy attempt.
e2label "${NEW_DEVICE_CHILD}" hassos-data-failed || true
e2label "${NEW_DEVICE_CHILD}" hassos-data-fail || true
exit 1
fi