multipath: add "rd.multipath=0" option

dracut.cmdline.7.asc

@@ -379,6 +379,11 @@ DM RAID
    only activate the raid sets with the given UUID. This parameter can be
    specified multiple times.
 
+MULTIPATH
+~~~~~~~~~
+**rd.multipath=0**::
+   disable multipath detection
+
 FIPS
 ~~~~
 **rd.fips**::
@@ -952,6 +957,8 @@ rd_NO_MD:: rd.md=0
 
 rd_MD_UUID:: rd.md.uuid
 
+rd_NO_MULTIPATH: rd.multipath=0
+
 rd_NFS_DOMAIN:: rd.nfs.domain
 
 iscsi_initiator:: rd.iscsi.initiator

modules.d/90multipath/multipathd.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -e /etc/multipath.conf ]; then
+if getargbool 1 rd.multipath -d -n rd_NO_MULTIPATH && [ -e /etc/multipath.conf ]; then
     modprobe dm-multipath
     multipathd -B || multipathd
     need_shutdown