Add fedora support for ramdisk-image-create.

This patch allows the creation of ramdisks from a fedora system.

Change-Id: Ic3b393af45ae1b85d015d2ceb5601ea723457da6

elements/deploy/root.d/50-redhat-prepare-fs

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+[ -n "$TARGET_ROOT" ]
+
+DISTRO=`lsb_release -si` || true
+
+if [[ "Fedora RedHatEnterpriseServer" =~ "$DISTRO" ]]; then
+  mkdir -p "$TARGET_ROOT/usr"
+  ln -s ../lib "$TARGET_ROOT/usr/lib"
+  if [ "`uname -m`" = "x86_64" ]; then
+      ln -s lib "$TARGET_ROOT/lib64"
+  fi
+fi

lib/common-functions

@@ -52,7 +52,7 @@ function save_image () {
 
 function generate_hooks () {
   mkdir -p $TMP_HOOKS_PATH
-  for _ELEMENT in $IMAGE_ELEMENT ; do
+  for _ELEMENT in $IMAGE_ELEMENT $RAMDISK_ELEMENT ; do
     for dir in $(echo $ELEMENTS_PATH | tr ":" " ") ; do
        [ -d $dir/$_ELEMENT ] || continue
       cp -t $TMP_HOOKS_PATH -a $dir/$_ELEMENT/* ;

lib/ramdisk-functions

@@ -68,11 +68,14 @@ function create_base () {
   # cjk adding for discovery support
   mkdir -p "$TMP_MOUNT_PATH/var/lib/dhcp"
   mkdir -p "$TMP_MOUNT_PATH/var/run"
-
   mkdir -p "$TMP_MOUNT_PATH/lib/udev/rules.d"
   cp -a "$LIB_UDEV/rules.d/50-firmware.rules" "$TMP_MOUNT_PATH/lib/udev/rules.d"
   cp -a "$LIB_UDEV/rules.d/80-drivers.rules" "$TMP_MOUNT_PATH/lib/udev/rules.d"
+
+  if [ -a $LIB_UDEV/firmware ]; then
     cp -a "$LIB_UDEV/firmware" "$TMP_MOUNT_PATH/lib/udev"
+  fi
+
   # cjk adding for hwdiscovery support
   cp "/sbin/dhclient-script" "$TMP_MOUNT_PATH/sbin"
 
@@ -89,6 +92,9 @@ udev_root="/dev"
 udev_rules="/lib/udev/rules.d"
 udev_log="no"
 EOF
+
+  generate_hooks
+  TARGET_ROOT=$TMP_MOUNT_PATH run_d root
 }
 
 function copy_required_libs() {
@@ -140,7 +146,25 @@ function copy_required_libs() {
 function populate_lib () {
   echo "Populating /lib"
 
-  for i in "$BUSYBOX" "$LIB_UDEV/firmware" bash lsmod modprobe udevd udevadm wget reboot shutdown $BINARY_DEPS ; do
+  # find udevd
+  UDEVD=
+  for f in /sbin/udevd /lib/udev/udevd /lib/systemd/systemd-udevd \
+          /usr/lib/systemd/systemd-udevd \
+          /usr/lib/udev/udevd; do
+      if [ -x "$f" ]; then
+          UDEVD="$f"
+          break
+      fi
+  done
+
+  UDEV_FIRMWARE=
+  if [ -a $LIB_UDEV/firmware ]; then
+     UDEV_FIRMWARE="$LIB_UDEV/firmware"
+  fi
+
+  for i in "$BUSYBOX" bash lsmod modprobe udevadm \
+           wget reboot shutdown $UDEVD $UDEV_FIRMWARE \
+           $BINARY_DEPS ; do
     if "$BUSYBOX" --list | grep "^$i\$" >/dev/null; then
       continue
     fi

scripts/init

@@ -49,6 +49,21 @@ readonly DEPLOYMENT_KEY=$(get_kernel_parameter deployment_key)
 readonly ISCSI_TARGET_IQN=$(get_kernel_parameter iscsi_target_iqn)
 
 mount -t sysfs none /sys
+
+UDEVD=
+if [ -x "/bin/systemd-udevd" ]; then
+    UDEVD="systemd-udevd"
+else
+    UDEVD="udevd"
+fi
+
+if [ "$UDEVD" = "systemd-udevd" ]; then
+    # devtmpfs is required since udev 176
+    mount -t devtmpfs none /dev
+    mkdir -p /run
+    mount -t tmpfs -o "nosuid,size=20%,mode=0755" tmpfs /run
+    mkdir -p /run/lock
+else
     mount -t tmpfs none /dev
     ln -sf /proc/self/fd /dev/fd
     mknod /dev/null c 1 3
@@ -70,6 +85,7 @@ mknod -m 0600 /dev/console c 5 1
     mknod -m 0666 /dev/ptmx c 5 2
     mkdir -p /dev/.udev
     mkdir -p /dev/.udev/data
+fi
 
 echo "starting syslogd"
 
@@ -78,7 +94,7 @@ syslogd
 klogd
 
 echo "starting udevd"
-udevd --daemon --resolve-names=never
+$UDEVD --daemon --resolve-names=never
 
 echo "load modules"
 load_modules_by_udev