add 90multipath-hostonly module

hardcoding the wwid of the drives in the initramfs causes problems
when the drives are cloned to a system with the same hardware, but
different disk wwid's

https://bugzilla.redhat.com/show_bug.cgi?id=1457311

modules.d/90multipath-hostonly/module-setup.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+    return 255
+}
+
+# called by dracut
+depends() {
+    echo multipath
+    return 0
+}
+
+# called by dracut
+install() {
+    local _f _allow
+
+    is_mpath() {
+        local _dev=$1
+        [ -e /sys/dev/block/$_dev/dm/uuid ] || return 1
+        [[ $(cat /sys/dev/block/$_dev/dm/uuid) =~ mpath- ]] && return 0
+        return 1
+    }
+
+    majmin_to_mpath_dev() {
+        local _dev
+        for i in /dev/mapper/*; do
+            [[ $i == /dev/mapper/control ]] && continue
+            _dev=$(get_maj_min $i)
+            if [ "$_dev" = "$1" ]; then
+                echo $i
+                return
+            fi
+        done
+    }
+
+    add_hostonly_mpath_conf() {
+        is_mpath $1 && {
+            local _dev
+
+            _dev=$(majmin_to_mpath_dev $1)
+            [ -z "$_dev" ] && return
+            strstr "$_allow" "$_dev" && return
+            _allow="$_allow --allow $_dev"
+        }
+    }
+
+    [[ $hostonly ]] && {
+        for_each_host_dev_and_slaves_all add_hostonly_mpath_conf
+        [ -n "$_allow" ] && mpathconf $_allow --outfile ${initdir}/etc/multipath.conf
+    }
+}
+

modules.d/90multipath/module-setup.sh

@@ -7,17 +7,6 @@ is_mpath() {
     return 1
 }
 
-majmin_to_mpath_dev() {
-    local _dev
-    for i in /dev/mapper/*; do
-        [[ $i == /dev/mapper/control ]] && continue
-        _dev=$(get_maj_min $i)
-        if [ "$_dev" = "$1" ]; then
-            echo $i
-            return
-        fi
-    done
-}
 # called by dracut
 check() {
     local _rootdev
@@ -64,16 +53,6 @@ installkernel() {
 # called by dracut
 install() {
     local _f _allow
-    add_hostonly_mpath_conf() {
-        is_mpath $1 && {
-            local _dev
-
-            _dev=$(majmin_to_mpath_dev $1)
-            [ -z "$_dev" ] && return
-            strstr "$_allow" "$_dev" && return
-            _allow="$_allow --allow $_dev"
-        }
-    }
 
     inst_multiple -o  \
         dmsetup \
@@ -88,11 +67,6 @@ install() {
         /etc/multipath.conf \
         /etc/multipath/*
 
-    [[ $hostonly ]] && {
-        for_each_host_dev_and_slaves_all add_hostonly_mpath_conf
-        [ -n "$_allow" ] && mpathconf $_allow --outfile ${initdir}/etc/multipath.conf
-    }
-
     inst $(command -v partx) /sbin/partx
 
     inst_libdir_file "libmultipath*" "multipath/*"