9764273894
The calculation whether to resize the partition only works with disks with 512 byte sector size. Use values provided by sfdisk exclusively to make sure comparing the same sector size. Furthermore, it seems that sgdisk does not like sfdisk's backup GPT placement: $ sgdisk -e /dev/zram1 Warning! Secondary partition table overlaps the last partition by 250 blocks! Today it seems sfdisk can handle GPT quite well. Use sfdisk for all operations in hassos-expand.
63 lines
2.3 KiB
Bash
Executable File
63 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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# ==============================================================================
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# HassOS partition expander
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# ==============================================================================
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set -e
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DEVICE_CHILD="$(findfs LABEL="hassos-data")"
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DEVICE_CHILD_NAME="$(basename "${DEVICE_CHILD}")"
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DEVICE_ROOT_NAME="$(lsblk -no pkname "${DEVICE_CHILD}")"
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DEVICE_ROOT="/dev/${DEVICE_ROOT_NAME}"
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PART_NUM="$(cat "/sys/class/block/${DEVICE_CHILD_NAME}/partition")"
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# Get partition label type
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PART_TABLE="$(sfdisk -lqJ "${DEVICE_ROOT}")"
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PART_LABEL="$(echo "${PART_TABLE}" | jq -r '.partitiontable.label')"
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if [ "${PART_LABEL}" = "gpt" ]; then
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echo "[INFO] Detected GPT partition label on ${DEVICE_ROOT}"
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if sfdisk --verify "${DEVICE_ROOT}" 2>&1 | grep "The backup GPT table is not on the end of the device."; then
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echo "[INFO] Moving GPT backup header to the end"
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sfdisk --relocate gpt-bak-std "${DEVICE_ROOT}"
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# Reload partition label to get correct .partitiontable.lastlba
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PART_TABLE="$(sfdisk -lqJ "${DEVICE_ROOT}")"
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fi
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else
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echo "[INFO] Detected MBR partition label on ${DEVICE_ROOT}"
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fi
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LAST_USABLE_LBA="$(echo "${PART_TABLE}" | jq -r '.partitiontable.lastlba')"
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# Calculate end of data partition
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JQ_FILTER=".partitiontable.partitions[] | select ( .node == \"${DEVICE_CHILD}\" ) | .start + .size"
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DATA_PARTITION_END="$(echo "${PART_TABLE}" | jq "${JQ_FILTER}")"
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# Need resize? Ignore free space if its less than 8MB/64MB (4k sectors) since
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# that could be partition alignment rounding...
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UNUSED_BLOCKS=$(( LAST_USABLE_LBA - DATA_PARTITION_END ))
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if [ "${UNUSED_BLOCKS}" -le "16384" ]; then
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echo "[INFO] No resize of data partition needed"
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exit 0
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fi
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echo "[INFO] Update hassos-data partition ${PART_NUM}"
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echo ", +" | sfdisk --no-reread --no-tell-kernel -N "${PART_NUM}" "${DEVICE_ROOT}"
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sfdisk -V "${DEVICE_ROOT}"
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# Update the kernel's partition table
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partx -u "${DEVICE_ROOT}"
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udevadm settle
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# Make sure /dev/disk/by-label/hassos-data is actually present before exiting.
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# This avoids a race condition with mnt-data.mount which might fail to bind
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# otherwise:
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# Bound to unit dev-disk-by\x2dlabel-hassos\x2ddata.device, but unit isn't active.
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if ! systemctl start "dev-disk-by\\x2dlabel-hassos\\x2ddata.device"; then
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echo "[ERROR] Data partition not found!"
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exit 1
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fi
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echo "[INFO] Finished hassos-data partition resizing"
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