Implement NFS mounting for Intel NUCs

This commit includes the following changes:
    - Implement NFS mounting support to initramfs
    - Load  network card driver and configure it with dhcp in initramfs

Change-Id: If9c6d30050713cdfc844b198e67dfba316c5a719
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>

4 files changed, 148 insertions, 5 deletions

diff --git a/meta-intel-extras/recipes/images/core-image-minimal-initramfs.bbappend b/meta-intel-extras/recipes/images/core-image-minimal-initramfs.bbappend
index c1918ba..fd7559a 100644
--- a/meta-intel-extras/recipes/images/core-image-minimal-initramfs.bbappend
+++ b/meta-intel-extras/recipes/images/core-image-minimal-initramfs.bbappend
@@ -27,5 +27,11 @@
 ##
 ############################################################################
 
-INITRAMFS_SCRIPTS += "initramfs-module-rtsx-pci-sdmmc"
-PACKAGE_INSTALL += "kernel-module-rtsx-pci-sdmmc"
+INITRAMFS_SCRIPTS += "\
+    initramfs-module-rtsx-pci-sdmmc \
+    initramfs-module-r8169 \
+    "
+PACKAGE_INSTALL += "\
+    kernel-module-rtsx-pci-sdmmc \
+    kernel-module-r8169 \
+    "
diff --git a/meta-intel-extras/recipes/initrdscripts/initramfs-framework/network b/meta-intel-extras/recipes/initrdscripts/initramfs-framework/network
new file mode 100644
index 0000000..134a70a
--- /dev/null
+++ b/meta-intel-extras/recipes/initrdscripts/initramfs-framework/network
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+############################################################################
+##
+## Copyright (C) 2019 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the Boot to Qt meta layer.
+##
+## $QT_BEGIN_LICENSE:GPL$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 or (at your option) any later version
+## approved by the KDE Free Qt Foundation. The licenses are as published by
+## the Free Software Foundation and appearing in the file LICENSE.GPL3
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+############################################################################
+
+network_enabled() {
+    return 0
+}
+
+network_run() {
+    if [ -n "$bootparam_ip" ]; then
+        load_kernel_module r8169
+        if [ "${bootparam_ip}" -ne "dhcp" ]; then
+            echo "WARN: DHCP only supported at this time."
+        fi
+        ip link set dev eth0 up
+        udhcpc
+    fi
+}
+
+
diff --git a/meta-intel-extras/recipes/initrdscripts/initramfs-framework/rootfs b/meta-intel-extras/recipes/initrdscripts/initramfs-framework/rootfs
new file mode 100755
index 0000000..c93c9c2
--- /dev/null
+++ b/meta-intel-extras/recipes/initrdscripts/initramfs-framework/rootfs
@@ -0,0 +1,79 @@
+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+rootfs_enabled() {
+    return 0
+}
+
+rootfs_run() {
+        if [ -z "$ROOTFS_DIR" ]; then
+            return
+        fi
+    C=0
+    delay=${bootparam_rootdelay:-1}
+    timeout=${bootparam_roottimeout:-5}
+    while [ ! -d $ROOTFS_DIR/dev ]; do
+        if [ $(( $C * $delay )) -gt $timeout ]; then
+            fatal "root '$bootparam_root' doesn't exist or does not contain a /dev."
+        fi
+
+        if [ -n "$bootparam_root" ]; then
+            debug "No e2fs compatible filesystem has been mounted, mounting $bootparam_root..."
+
+            if [ "`echo ${bootparam_root} | cut -c1-5`" = "UUID=" ]; then
+                root_uuid=`echo $bootparam_root | cut -c6-`
+                bootparam_root="/dev/disk/by-uuid/$root_uuid"
+            fi
+
+            if [ "`echo ${bootparam_root} | cut -c1-9`" = "PARTUUID=" ]; then
+                root_uuid=`echo $bootparam_root | cut -c10-`
+                bootparam_root="/dev/disk/by-partuuid/$root_uuid"
+            fi
+
+            if [ "`echo ${bootparam_root} | cut -c1-6`" = "LABEL=" ]; then
+                root_label=`echo $bootparam_root | cut -c7-`
+                bootparam_root="/dev/disk/by-label/$root_label"
+            fi
+
+            if [ "${bootparam_root}" = "/dev/nfs" ]; then
+                bootparam_rootfstype="nfs"
+                bootparam_root=`echo $bootparam_nfsroot | cut -f1 -d","`
+                bootparam_nfsopts=`echo $bootparam_nfsroot | cut -f2- -d","`
+            fi
+
+            if [ -e "$bootparam_root" ] || [ "${bootparam_rootfstype}" = "nfs" ]; then
+                flags=""
+                if [ -n "$bootparam_ro" ] && ! echo "$bootparam_rootflags" | grep -w -q "ro"; then
+                    if [  -n "$bootparam_rootflags" ]; then
+                        bootparam_rootflags="$bootparam_rootflags,"
+                    fi
+                    bootparam_rootflags="${bootparam_rootflags}ro"
+                fi
+                if [ -n "$bootparam_nfsopts" ]; then
+                    if [  -n "$bootparam_rootflags" ]; then
+                        bootparam_rootflags="$bootparam_rootflags,"
+                    fi
+                    bootparam_rootflags="${bootparam_rootflags}${bootparam_nfsopts}"
+                fi
+                if [ -n "$bootparam_rootflags" ]; then
+                    flags="$flags -o$bootparam_rootflags"
+                fi
+                if [ -n "$bootparam_rootfstype" ]; then
+                    flags="$flags -t$bootparam_rootfstype"
+                fi
+                mount $flags $bootparam_root $ROOTFS_DIR
+                if [ -d $ROOTFS_DIR/dev ]; then
+                    break
+                else
+                    # It is unlikely to change, but keep trying anyway.
+                    # Perhaps we pick a different device next time.
+                    umount $ROOTFS_DIR
+                    fi
+                fi
+        fi
+        debug "Sleeping for $delay second(s) to wait root to settle..."
+        sleep $delay
+        C=$(( $C + 1 ))
+    done
+}
diff --git a/meta-intel-extras/recipes/initrdscripts/initramfs-framework_1.0.bbappend b/meta-intel-extras/recipes/initrdscripts/initramfs-framework_1.0.bbappend
index cfd05cd..2a8ac89 100644
--- a/meta-intel-extras/recipes/initrdscripts/initramfs-framework_1.0.bbappend
+++ b/meta-intel-extras/recipes/initrdscripts/initramfs-framework_1.0.bbappend
@@ -1,6 +1,6 @@
 ############################################################################
 ##
-## Copyright (C) 2018 The Qt Company Ltd.
+## Copyright (C) 2019 The Qt Company Ltd.
 ## Contact: https://www.qt.io/licensing/
 ##
 ## This file is part of the Boot to Qt meta layer.
@@ -29,14 +29,25 @@
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
 
-SRC_URI += "file://rtsx_pci_sdmmc"
+SRC_URI += "\
+    file://rtsx_pci_sdmmc \
+    file://network \
+    "
 
 do_install_append() {
     install -m 0755 ${WORKDIR}/rtsx_pci_sdmmc ${D}/init.d/20-rtsx_pci_sdmmc
+    install -m 0755 ${WORKDIR}/network ${D}/init.d/30-network
 }
 
-PACKAGES += "initramfs-module-rtsx-pci-sdmmc"
+PACKAGES += "\
+    initramfs-module-rtsx-pci-sdmmc \
+    initramfs-module-r8169 \
+    "
 
 SUMMARY_initramfs-module-rtsx-pci-sdmmc = "initramfs support for rtsx_pci_sdmmc"
 RDEPENDS_initramfs-module-rtsx-pci-sdmmc = "${PN}-base"
 FILES_initramfs-module-rtsx-pci-sdmmc = "/init.d/20-rtsx_pci_sdmmc"
+
+SUMMARY_initramfs-module-r8169 = "initramfs support for Realtek LAN driver"
+RDEPENDS_initramfs-module-r8169 = "${PN}-base"
+FILES_initramfs-module-r8169 = "/init.d/30-network"