Added mount-btrfs script to auto mount/unmount btrfs root volume

scripts/mount-btrfs

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+restoreDir="/etc/restore"
+
+scriptPath="$(dirname "$(readlink -f "$0")")"
+
+source "${scriptPath}/functions.sh"
+
+hook_before() {
+    local btrfsPartition
+
+    btrfsPartition="$(findmnt -oSOURCE -rnv /)"
+
+    if [[ ! -d "/.btrfs" ]]; then
+        mkdir /.btrfs
+    fi
+
+    if ! mount | grep '\.btrfs' &>/dev/null; then
+        mount "$btrfsPartition" -o subvolid=5 /.btrfs || exit 200
+    fi
+}
+
+hook_fail() {
+    if mount | grep '\.btrfs' &>/dev/null; then
+        umount /.brtfs || exit 200
+    fi
+}
+
+hook_after() {
+    :
+}
+
+hook_final() {
+    if mount | grep '\.btrfs' &>/dev/null; then
+        umount /.brtfs || exit 200
+    fi
+}
+
+
+case "$1" in
+    before)     hook_before     || exit $?;;
+    after)      hook_after      || exit $?;;
+    fail)       hook_final      || exit $?;;
+    finally)    hook_final      || exit $?;;
+esac