Check rd.zfcp= format in dracut hook:cmdline process stage

When using rd.zfcp= parameter in generic.prm file, wrong format
parameters will prevent the zfcp driver to add the correct SCSI
disk. dracut should die when a wrong rd.zfcp= parameter supplied.

Signed-off-by: Zhiguo Deng <bjzgdeng@linux.vnet.ibm.com>

modules.d/95zfcp/parse-zfcp.sh

@@ -3,6 +3,8 @@
 getargbool 1 rd.zfcp.conf -d -n rd_NO_ZFCPCONF || rm /etc/zfcp.conf
 
 for zfcp_arg in $(getargs rd.zfcp -d 'rd_ZFCP='); do
+    echo $zfcp_arg | grep '0\.[0-9a-fA-F]\.[0-9a-fA-F]\{4\},0x[0-9a-fA-F]\{16\},0x[0-9a-fA-F]\{16\}' >/dev/null
+    test $? -ne 0 && die "For argument 'rd.zfcp=$zfcp_arg'\nSorry, invalid format."
     (
         IFS=","
         set $zfcp_arg