1 files changed, 53 insertions, 0 deletions
diff --git a/modules.d/90dm/dm-shutdown.sh b/modules.d/90dm/dm-shutdown.sh
new file mode 100755
index 0000000..bd7134a
--- /dev/null
+++ b/modules.d/90dm/dm-shutdown.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+_remove_dm() {
+    local dev="$1"
+    local s
+    local devname
+
+    for s in /sys/block/"${dev}"/holders/dm-*; do
+        [ -e "${s}" ] || continue
+        _remove_dm "${s##*/}"
+    done
+    # multipath devices might have MD devices on top,
+    # which are removed after this script. So do not
+    # remove those to avoid spurious errors
+    case $(cat /sys/block/"${dev}"/dm/uuid) in
+        mpath-*)
+            return 0
+            ;;
+        *)
+            read -r devname < /sys/block/"${dev}"/dm/name
+            dmsetup -v --noudevsync remove "$devname" || return $?
+            ;;
+    esac
+    return 0
+}
+
+_do_dm_shutdown() {
+    local ret=0
+    local final="$1"
+    local dev
+
+    info "Disassembling device-mapper devices"
+    for dev in /sys/block/dm-*; do
+        [ -e "${dev}" ] || continue
+        if [ "x$final" != "x" ]; then
+            _remove_dm "${dev##*/}" || ret=$?
+        else
+            _remove_dm "${dev##*/}" > /dev/null 2>&1 || ret=$?
+        fi
+    done
+    if [ "x$final" != "x" ]; then
+        info "dmsetup ls --tree"
+        dmsetup ls --tree 2>&1 | vinfo
+    fi
+    return $ret
+}
+
+if command -v dmsetup > /dev/null \
+    && [ "x$(dmsetup status)" != "xNo devices found" ]; then
+    _do_dm_shutdown "$1"
+else
+    :
+fi