add zfcp support for s390

dracut.8

@@ -174,6 +174,15 @@ only activate the raid sets with the given UUID
 .B rd_DASD=....
 same syntax as the kernel module parameter (s390 only)
 
+.SH ZFCP
+.TP
+.B rd_ZFCP=<zfcp adaptor device bus ID>,<WWPN>,<FCPLUN>
+rd_zfcp can be specified multiple times on the kernel command line.
+example: rd_zfcp=0.0.4000,0x5005076300C213e9,0x5022000000000000 
+.TP
+.B rd_NO_ZFCPCONF
+ignore zfcp.conf included in the initramfs
+
 .SH DHCP
 .TP
 .B root=dhcp

modules.d/95zfcp/56-zfcp.rules

@@ -0,0 +1 @@
+KERNEL=="zfcp_cfdc", RUN+="/sbin/zfcpconf.sh"

modules.d/95zfcp/check

@@ -0,0 +1,5 @@
+#!/bin/bash
+arch=$(uname -m)
+[ "$arch" = "s390" -o "$arch" = "s390x" ] || exit 1 
+
+exit 0

modules.d/95zfcp/install

@@ -0,0 +1,6 @@
+#!/bin/bash
+inst_hook cmdline 30 "$moddir/parse-zfcp.sh"
+dracut_install tr
+inst "$moddir/zfcpconf.sh" /sbin/zfcpconf.sh
+inst_rules "$moddir/56-zfcp.rules"
+inst /etc/zfcp.conf

modules.d/95zfcp/installkernel

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+instmods zfcp
+	
+

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

@@ -0,0 +1,11 @@
+
+getarg rd_NO_ZFCPCONF && rm /etc/zfcp.conf
+
+for zfcp_arg in $(getargs 'rd_ZFCP='); do
+    ( 
+        IFS=","
+        set $zfcp_arg
+        echo "$@" >> /etc/zfcp.conf
+    )
+done
+

modules.d/95zfcp/zfcpconf.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# config file syntax:
+# deviceno   WWPN   FCPLUN
+#
+# Example:
+# 0.0.4000 0x5005076300C213e9 0x5022000000000000 
+# 0.0.4001 0x5005076300c213e9 0x5023000000000000 
+#
+#
+# manual setup:
+# modprobe zfcp
+# echo 1    > /sys/bus/ccw/drivers/zfcp/0.0.4000/online
+# echo LUN  > /sys/bus/ccw/drivers/zfcp/0.0.4000/WWPN/unit_add
+# 
+# Example:
+# modprobe zfcp
+# echo 1                  > /sys/bus/ccw/drivers/zfcp/0.0.4000/online
+# echo 0x5022000000000000 > /sys/bus/ccw/drivers/zfcp/0.0.4000/0x5005076300c213e9/unit_add
+
+CONFIG=/etc/zfcp.conf
+PATH=/bin:/usr/bin:/sbin:/usr/sbin
+
+if [ -f "$CONFIG" ]; then
+   if [ ! -d /sys/bus/ccw/drivers/zfcp ]; then
+      modprobe zfcp
+   fi
+   if [ ! -d /sys/bus/ccw/drivers/zfcp ]; then
+      return
+   fi
+   tr "A-Z" "a-z" < $CONFIG| while read line; do
+       case $line in
+	   \#*) ;;
+	   *)
+	       [ -z "$line" ] && continue
+	       set $line
+	       if [ $# -eq 5 ]; then
+		   DEVICE=$1
+		   SCSIID=$2
+		   WWPN=$3
+		   SCSILUN=$4
+		   FCPLUN=$5
+		   echo "Warning: Deprecated values in /etc/zfcp.conf, ignoring SCSI ID $SCSIID and SCSI LUN $SCSILUN"
+	       elif [ $# -eq 3 ]; then
+		   DEVICE=${1##*0x}
+		   WWPN=$2
+		   FCPLUN=$3
+	       fi
+	       echo 1 > /sys/bus/ccw/drivers/zfcp/${DEVICE}/online
+	       [ ! -d /sys/bus/ccw/drivers/zfcp/${DEVICE}/${WWPN}/${FCPLUN} ] \
+		   && echo $FCPLUN > /sys/bus/ccw/drivers/zfcp/${DEVICE}/${WWPN}/unit_add
+	       ;;
+       esac
+   done
+fi