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Add full preallocation (writing zeroes)

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This commit is contained in:
Kroese 2023-04-19 04:15:11 +02:00 committed by GitHub
commit 621a95d080
2 changed files with 65 additions and 13 deletions
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46
run/disk.sh
View File

@ -29,7 +29,7 @@ if [ -f "${DATA}" ]; then
echo "INFO: Resizing data disk from $OLD_SIZE to $DATA_SIZE bytes.."
if [ "$ALLOCATE" != "Y" ]; then
if [ "$ALLOCATE" = "N" ]; then
truncate -s "${DATA_SIZE}" "${DATA}";
@ -45,10 +45,20 @@ if [ -f "${DATA}" ]; then
echo "ERROR: Specify a smaller size or disable preallocation with ALLOCATION=N." && exit 84
fi
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
echo "ERROR: Could not allocate a file for the virtual disk." && exit 85
fi
if [ "$ALLOCATE" = "Z" ]; then
GB=$(( (REQ + 1073741823)/1073741824 ))
echo "INFO: Writing ${GB} GB of zeroes, please wait.."
dd if=/dev/zero of="${DATA}" seek="${OLD_SIZE}" count="${REQ}" bs=1M iflag=count_bytes oflag=seek_bytes
else
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
echo "ERROR: Could not allocate a file for the virtual disk." && exit 85
fi
fi
fi
fi
@ -66,7 +76,7 @@ if [ ! -f "${DATA}" ]; then
# Create an empty file
if [ "$ALLOCATE" != "Y" ]; then
if [ "$ALLOCATE" = "N" ]; then
truncate -s "${DATA_SIZE}" "${DATA}"
@ -80,16 +90,25 @@ if [ ! -f "${DATA}" ]; then
echo "ERROR: Specify a smaller size or disable preallocation with ALLOCATION=N." && exit 86
fi
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
rm -f "${DATA}"
echo "ERROR: Could not allocate a file for the virtual disk." && exit 87
fi
if [ "$ALLOCATE" = "Z" ]; then
echo "INFO: Writing ${DISK_SIZE} of zeroes, please wait.."
dd if=/dev/zero of="${DATA}" count="${DATA_SIZE}" bs=1M iflag=count_bytes
else
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
rm -f "${DATA}"
echo "ERROR: Could not allocate a file for the virtual disk." && exit 87
fi
fi
fi
# Check if file exists
if [ ! -f "${DATA}" ]; then
echo "ERROR: Virtual DSM data disk does not exist ($DATA)" && exit 88
echo "ERROR: Virtual disk does not exist ($DATA)" && exit 88
fi
# Format as BTRFS filesystem
@ -97,6 +116,13 @@ if [ ! -f "${DATA}" ]; then
fi
# Check the filesize
SIZE=$(stat -c%s "${DATA}")
if [[ SIZE -ne DATA_SIZE ]]; then
echo "ERROR: Virtual disk has the wrong size: ${SIZE}" && exit 89
fi
AGENT="${STORAGE}/${BASE}.agent"
[ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}") || AGENT_VERSION=1

32
run/install.sh
View File

@ -106,7 +106,7 @@ unzip -q -o "$BOOT".zip -d $TMP
echo "Install: Creating partition table..."
SYSTEM="$TMP/sys.img"
SYSTEM_SIZE="4954537983"
SYSTEM_SIZE=4954537983
# Check free diskspace
SPACE=$(df --output=avail -B 1 "$TMP" | tail -n 1)
@ -115,9 +115,35 @@ if (( SYSTEM_SIZE > SPACE )); then
echo "ERROR: Not enough free space to create a 4 GB system disk." && exit 87
fi
if ! fallocate -l "${SYSTEM_SIZE}" "${SYSTEM}"; then
if [ "$ALLOCATE" != "Z" ]; then
# Cannot use truncate here because of swap partition
if ! fallocate -l "${SYSTEM_SIZE}" "${SYSTEM}"; then
rm -f "${SYSTEM}"
echo "ERROR: Could not allocate a file for the system disk." && exit 88
fi
else
GB=$(( (SYSTEM_SIZE + 1073741823)/1073741824 ))
echo "INFO: Writing ${GB} GB of zeroes, please wait.."
dd if=/dev/zero of="${SYSTEM}" count="${SYSTEM_SIZE}" bs=1M iflag=count_bytes
fi
# Check if file exists
if [ ! -f "${SYSTEM}" ]; then
echo "ERROR: System disk does not exist ($SYSTEM)" && exit 89
fi
# Check the filesize
SIZE=$(stat -c%s "${SYSTEM}")
if [[ SIZE -ne SYSTEM_SIZE ]]; then
rm -f "${SYSTEM}"
echo "ERROR: Could not allocate a file for the system disk." && exit 88
echo "ERROR: System disk has the wrong size: ${SIZE}" && exit 90
fi
PART="$TMP/partition.fdisk"