udev-rules: be more careful about md devices and blkid runs

modules.d/95udev-rules/59-persistent-storage.rules

@@ -3,7 +3,26 @@ ACTION!="add|change", GOTO="ps_end"
 
 KERNEL=="cciss[0-9]*", IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
 KERNEL=="nbd[0-9]*", IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
-KERNEL=="md[0-9]*|md_d[0-9]*|md/*", IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
+
+
+KERNEL!="md[0-9]*|md_d[0-9]*|md/*", KERNEL!="md*", GOTO="md_end"
+
+# partitions have no md/{array_state,metadata_version}
+ENV{DEVTYPE}=="partition", GOTO="md_ignore_state"
+
+# container devices have a metadata version of e.g. 'external:ddf' and
+# never leave state 'inactive'
+ATTR{md/metadata_version}=="external:[A-Za-z]*", ATTR{md/array_state}=="inactive", GOTO="md_ignore_state"
+TEST!="md/array_state", GOTO="md_end"
+ATTR{md/array_state}=="|clear|inactive", GOTO="md_end"
+
+LABEL="md_ignore_state"
+
+IMPORT{program}="/sbin/mdadm --detail --export $tempnode"
+IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
+OPTIONS+="link_priority=100"
+OPTIONS+="watch"
+LABEL="md_end"
 
 
 KERNEL!="dm-[0-9]*", GOTO="ps_end"