ifcfg/write-ifcfg.sh: add s390 specific configuration options

https://bugzilla.redhat.com/show_bug.cgi?id=811521

modules.d/45ifcfg/write-ifcfg.sh

@@ -20,6 +20,68 @@ fi
 mkdir -m 0755 -p /tmp/ifcfg/
 mkdir -m 0755 -p /tmp/ifcfg-leases/
 
+get_config_line_by_subchannel()
+{
+    local CHANNEL
+    local line
+
+    CHANNELS="$1"
+    while read line; do
+        if strstr "$line" "$CHANNELS"; then
+            echo $line
+            return 0
+        fi
+    done < /etc/ccw.conf
+    return 1
+}
+
+print_s390() {
+    local _netif
+    local SUBCHANNELS
+    local OPTIONS
+    local NETTYPE
+    local CONFIG_LINE
+    local i
+    local channel
+
+    _netif="$1"
+    # if we find ccw channel, then use those, instead of
+    # of the MAC
+    SUBCHANNELS=$({
+        for i in /sys/class/net/$_netif/device/cdev[0-9]*; do
+            [ -e $i ] || continue
+            channel=$(readlink -f $i)
+            echo -n "${channel##*/},"
+        done
+    })
+    [ -n "$SUBCHANNELS" ] || return 1
+
+    SUBCHANNELS=${SUBCHANNELS%,}
+    echo "SUBCHANNELS=\"${SUBCHANNELS}\""
+    CONFIG_LINE=$(get_config_line_by_subchannel $SUBCHANNELS)
+
+    [ $? -ne 0 -o -z "$CONFIG_LINE" ] && return
+
+    IFS=","
+    set $CONFIG_LINE
+    IFS="$OLD_IFS"
+    NETTYPE=$1
+    shift
+    SUBCHANNELS="$1"
+    OPTIONS=""
+    shift
+    while [ $# -gt 0 ]; do
+        case $1 in
+            *=*) OPTIONS="$OPTIONS $1";;
+        esac
+        shift
+    done
+    OPTIONS=${OPTIONS## }
+    echo "NETTYPE=\"${NETTYPE}\""
+    echo "OPTIONS=\"${OPTIONS}\""
+}
+
+
 for netif in $IFACES ; do
     # bridge?
     unset bridge
@@ -38,7 +100,6 @@ for netif in $IFACES ; do
         echo "ONBOOT=yes"
         echo "NETBOOT=yes"
         echo "UUID=$uuid"
-        [ -n "$macaddr" ] && echo "MACADDR=$macaddr"
         [ -n "$mtu" ] && echo "MTU=$mtu"
         if [ -f /tmp/net.$netif.lease ]; then
             strstr "$ip" '*:*:*' &&
@@ -63,7 +124,12 @@ for netif in $IFACES ; do
     if [ -z "$bridge" ] && [ -z "$bond" ]; then
         # standard interface
         {
-            echo "HWADDR=$(cat /sys/class/net/$netif/address)"
+            if [ -n "$macaddr" ]; then
+                echo "MACADDR=$macaddr"
+            else
+                echo "HWADDR=\"$(cat /sys/class/net/$netif/address)\""
+            fi
+            print_s390 $netif
             echo "TYPE=Ethernet"
             echo "NAME=\"Boot Disk\""
             [ -n "$mtu" ] && echo "MTU=$mtu"