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Improved initial mount & 'snapshots' subvolume check

This commit is contained in:
Jarno Rankinen 2021-10-27 21:27:10 +03:00
parent a13cba3790
commit d502f26ed8
1 changed files with 15 additions and 25 deletions
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@ -60,39 +60,29 @@ mount_check() {
# Check that the toplevel subvolume (id=5) is mounted, and if not,
# mount it to path defined in $TOPLEVEL
mount | grep subvolid=5 | grep "${TOPLEVEL}" > /dev/null
if [[ "$?" -ne 0 ]]; then
if ! mount | grep subvolid=5 | grep "${TOPLEVEL}" &> /dev/null; then
# Get the UUID of the current btrfs volume
MOUNT_UUID=$(btrfs filesystem show | grep uuid | cut -d ':' -f 3)
# Create the mountpoint for the toplevel if needed
[[ -d ${TOPLEVEL} ]] || mkdir -p ${TOPLEVEL}
# Mount the toplevel
mount -U ${MOUNT_UUID} -o subvolid=5 ${TOPLEVEL}
printf "Created mountpoint ${TOPLEVEL} for the top level subvolume.\n"
fi
if [[ -n ${SNAPSHOT} ]]; then
# If taking a snapshot,
# check that the subvolume storing snapshots exists and if not, ask
# to create it.
${BTRFS_EXECUTABLE} subvolume show ${SNAPSHOTS_LOCATION} > /dev/null
if [[ "$?" -ne 0 ]]; then
printf "Subvolume ${SNAPSHOTS_LOCATION} does not exist. Create it now?\n"
# Check that the subvolume for storing snapshots exists, and if not,
# ask to create it
if ! ${BTRFS_EXECUTABLE} subvolume show ${SNAPSHOTS_LOCATION} &> /dev/null; then
printf "Subvolume ${SNAPSHOTS_LOCATION} does not exist. Create it now? "
read -n 1 -p "y/n: "
if [[ "${REPLY}" == "y" ]]; then
printf "\n"
# Create subvolume defined with SNAPSHOTS_LOCATION
${BTRFS_EXECUTABLE} subvolume create ${SNAPSHOTS_LOCATION}
unset ${REPLY}
else
exit 1
fi
fi
else
# Otherwise, just check that the subvolume in SNAPSHOTS_LOCATION
# exists, and notify if not.
${BTRFS_EXECUTABLE} subvolume show ${SNAPSHOTS_LOCATION} > /dev/null
if [[ "$?" -ne 0 ]]; then
printf "Subvolume ${SNAPSHOTS_LOCATION} does not exist.\n"
printf "\n$0 needs the 'snapshots' subvolume to operate. Please see README.md\n"
exit 1
fi
fi