Initial version

1 files changed, 74 insertions, 0 deletions

diff --git a/dattobd_remove_filesystem_snapshot b/dattobd_remove_filesystem_snapshot
new file mode 100644
index 000000000000..16c9a63f0529
--- /dev/null
+++ b/dattobd_remove_filesystem_snapshot
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+set -e
+
+SNAP_ID=$1
+SNAP_MOUNTPOINT="$2"
+SNAP_ORIG_PATH="$5"
+
+remove_overlay() {
+	if test -e "$SNAP_ORIG_PATH/.overlay_$SNAP_ID"
+	then
+		LODEV=`losetup -j "$SNAP_ORIG_PATH/.overlay_$SNAP_ID" | cut -d':' -f1`
+		if [ "x$LODEV" != x ]
+		then
+			losetup -d $LODEV
+		fi
+		rm "$SNAP_ORIG_PATH/.overlay_$SNAP_ID"
+	fi
+}
+
+if ! test -e $SNAP_MOUNTPOINT
+then
+    echo "Snapshot at $SNAP_MOUNTPOINT was already removed"
+    [ ! -e "$SNAP_ORIG_PATH/.datto_$SNAP_ID" ] || rm "$SNAP_ORIG_PATH/.datto_$SNAP_ID"
+    [ ! -e "${SNAP_MOUNTPOINT}-num" ] || rm "${SNAP_MOUNTPOINT}-num"
+	remove_overlay
+    exit 0
+fi
+
+if ! df -T -P | egrep " ${SNAP_MOUNTPOINT}\$" > /dev/null 2>&1
+then
+    echo "Snapshot is not mounted. Already removed"
+    rm "${SNAP_MOUNTPOINT}-num"
+    rmdir "${SNAP_MOUNTPOINT}"
+    [ ! -e "$SNAP_ORIG_PATH/.datto_$SNAP_ID" ] || rm "$SNAP_ORIG_PATH/.datto_$SNAP_ID"
+    remove_overlay
+    exit 0
+fi
+
+NUM=`cat "${SNAP_MOUNTPOINT}-num"` || true
+
+if [ "x$NUM" = "x" ]
+then
+    echo "Cannot get device number from ${SNAP_MOUNTPOINT}-num"
+    exit 1
+fi
+
+echo "Unmounting /dev/datto$NUM at /mnt/urbackup_snaps/$SNAP_ID..."
+
+if ! umount /mnt/urbackup_snaps/$SNAP_ID
+then
+	lsof | grep /mnt/urbackup_snaps/$SNAP_ID || true
+    echo "Unmounting /mnt/urbackup_snaps/$SNAP_ID failed. Retrying in 10s..."
+    sleep 10
+    umount /mnt/urbackup_snaps/$SNAP_ID
+fi
+
+
+rm "${SNAP_MOUNTPOINT}-num"
+rmdir "${SNAP_MOUNTPOINT}"
+
+echo "Removing devicemapper snapshot..."
+
+dmsetup remove "wsnap-$SNAP_ID"
+
+remove_overlay
+
+echo "Destroying dattobd snapshot /dev/datto$NUM..."
+
+dbdctl destroy $NUM
+
+[ ! -e "$SNAP_ORIG_PATH/.datto_$SNAP_ID" ] || rm "$SNAP_ORIG_PATH/.datto_$SNAP_ID"
+
+exit 0
\ No newline at end of file