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[194.138.37.39]) by gmr-mx.google.com with ESMTPS id a41si428129edf.1.2020.04.14.05.24.56 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 14 Apr 2020 05:24:56 -0700 (PDT) Received-SPF: pass (google.com: domain of quirin.gylstorff@siemens.com designates 194.138.37.39 as permitted sender) client-ip=194.138.37.39; Authentication-Results: gmr-mx.google.com; spf=pass (google.com: domain of quirin.gylstorff@siemens.com designates 194.138.37.39 as permitted sender) smtp.mailfrom=Quirin.Gylstorff@siemens.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=siemens.com Received: from mail2.sbs.de (mail2.sbs.de [192.129.41.66]) by lizzard.sbs.de (8.15.2/8.15.2) with ESMTPS id 03ECOuWr025057 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 14 Apr 2020 14:24:56 +0200 Received: from md2dvrtc.ad001.siemens.net ([139.22.46.75]) by mail2.sbs.de (8.15.2/8.15.2) with ESMTP id 03ECOtbs007450; Tue, 14 Apr 2020 14:24:55 +0200 From: "Q. Gylstorff" To: isar-users@googlegroups.com Cc: Quirin Gylstorff Subject: [PATCH v3 1/3] meta/support: Generate a custom initramfs Date: Tue, 14 Apr 2020 14:24:47 +0200 Message-Id: <20200414122449.26528-2-Quirin.Gylstorff@siemens.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200414122449.26528-1-Quirin.Gylstorff@siemens.com> References: <20200409085427.0a2c6b5d@md1za8fc.ad001.siemens.net> <20200414122449.26528-1-Quirin.Gylstorff@siemens.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TUID: 115WTQtihfZp From: Quirin Gylstorff This package sets the Parameters for mkinitramfs/update-intramfs before it regenerates the initrd.img of debian with a modified version. Use cases are the remove unnecessary kernel modules to reduce the size of the initrd by using the parameters: ``` INITRAMFS_MODULES = "list" INITRAMFS_MODULE_LIST += "ext4" ``` Set the boot root during the initrd generation by setting `INITRAMFS_ROOT`. see also man pages of mkinitramfs and initramfs.conf. Signed-off-by: Quirin Gylstorff --- .../initramfs-config/files/control.tmpl | 12 +++++++ .../initramfs-config/files/postinst.tmpl | 27 ++++++++++++++++ .../initramfs-config/files/postrm.tmpl | 19 +++++++++++ .../initramfs-config/initramfs-config_0.1.bb | 32 +++++++++++++++++++ 4 files changed, 90 insertions(+) create mode 100644 meta/recipes-support/initramfs-config/files/control.tmpl create mode 100644 meta/recipes-support/initramfs-config/files/postinst.tmpl create mode 100644 meta/recipes-support/initramfs-config/files/postrm.tmpl create mode 100644 meta/recipes-support/initramfs-config/initramfs-config_0.1.bb diff --git a/meta/recipes-support/initramfs-config/files/control.tmpl b/meta/recipes-support/initramfs-config/files/control.tmpl new file mode 100644 index 0000000..8739b4a --- /dev/null +++ b/meta/recipes-support/initramfs-config/files/control.tmpl @@ -0,0 +1,12 @@ +Source: initramfs-config +Section: misc +Priority: optional +Standards-Version: 3.9.6 +Maintainer: isar-users +Build-Depends: debhelper (>= 9) + + +Package: initramfs-config +Architecture: any +Depends: ${shlibs:Depends}, ${misc:Depends}, initramfs-tools-core, ${DEBIAN_DEPENDS} +Description: Configuration files for a custom initramfs \ No newline at end of file diff --git a/meta/recipes-support/initramfs-config/files/postinst.tmpl b/meta/recipes-support/initramfs-config/files/postinst.tmpl new file mode 100644 index 0000000..ca8c9c6 --- /dev/null +++ b/meta/recipes-support/initramfs-config/files/postinst.tmpl @@ -0,0 +1,27 @@ +#!/bin/bash +INITRAMFS_CONF=/etc/initramfs-tools/initramfs.conf +if [ -f ${INITRAMFS_CONF} ]; then + sed -i -E 's/(^MODULES=).*/\1${INITRAMFS_MODULES}/' ${INITRAMFS_CONF} + sed -i -E 's/(^BUSYBOX=).*/\1${INITRAMFS_BUSYBOX}/' ${INITRAMFS_CONF} + sed -i -E 's/(^COMPRESS=).*/\1${INITRAMFS_COMPRESS}/' ${INITRAMFS_CONF} + sed -i -E 's/(^KEYMAP=).*/\1${INITRAMFS_KEYMAP}/' ${INITRAMFS_CONF} + sed -i -E 's/(^DEVICE=).*/\1${INITRAMFS_NET_DEVICE}/' ${INITRAMFS_CONF} + sed -i -E 's/(^NFSROOT=).*/\1${INITRAMFS_NFSROOT}/' ${INITRAMFS_CONF} + sed -i -E 's/(^RUNSIZE=).*/\1${INITRAMFS_RUNSIZE}/' ${INITRAMFS_CONF} + if grep -Fxq "ROOT=" "${INITRAMFS_CONF}"; then + sed -i -E 's/(^ROOT=).*/\1${INITRAMFS_ROOT}/' ${INITRAMFS_CONF} + else + sed -i -E "\$aROOT=${INITRAMFS_ROOT}" ${INITRAMFS_CONF} + fi +fi + +MODULES_LIST_FILE=/etc/initramfs-tools/modules +if [ -f ${MODULES_LIST_FILE} ]; then + for modname in ${INITRAMFS_MODULE_LIST}; do + if ! grep -Fxq "$modname" "${MODULES_LIST_FILE}"; then + echo "$modname" >> "${MODULES_LIST_FILE}" + fi + done +fi + +update-initramfs -v -u diff --git a/meta/recipes-support/initramfs-config/files/postrm.tmpl b/meta/recipes-support/initramfs-config/files/postrm.tmpl new file mode 100644 index 0000000..55399d5 --- /dev/null +++ b/meta/recipes-support/initramfs-config/files/postrm.tmpl @@ -0,0 +1,19 @@ +#!/bin/bash +# back to the debian defaults +INITRAMFS_CONF=/etc/initramfs-tools/initramfs.conf +sed -i -E 's/(^MODULES=).*/\1most/' ${INITRAMFS_CONF} +sed -i -E 's/(^BUSYBOX=).*/\1auto/' ${INITRAMFS_CONF} +sed -i -E 's/(^COMPRESS=).*/\1gzip/' ${INITRAMFS_CONF} +sed -i -E 's/(^KEYMAP=).*/\1n/' ${INITRAMFS_CONF} +sed -i -E 's/(^DEVICE=).*/\1/' ${INITRAMFS_CONF} +sed -i -E 's/(^NFSROOT=).*/\1auto/' ${INITRAMFS_CONF} +sed -i -E 's/(^RUNSIZE=).*/\110%/' ${INITRAMFS_CONF} +sed -i -E 's/(^ROOT=).*//' ${INITRAMFS_CONF} + +# remove the added modules +MODULES_LIST_FILE=/etc/initramfs-tools/modules +for modname in ${INITRAMFS_MODULE_LIST}; do + sed -i -E 's/$modname//' +done + +update-initramfs -v -u diff --git a/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb b/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb new file mode 100644 index 0000000..34bb25b --- /dev/null +++ b/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb @@ -0,0 +1,32 @@ +# This software is a part of ISAR. +# Copyright (C) 2020 Siemens AG +# +# SPDX-License-Identifier: MIT +inherit dpkg-raw +inherit template +DESCRIPTION = "Recipe to set the initramfs configuration and generate a new ramfs" + + +SRC_URI = "file://postinst.tmpl \ + file://postrm.tmpl \ + file://control.tmpl \ + " + +INITRAMFS_MODULES ?= "most" +INITRAMFS_BUSYBOX ?= "auto" +INITRAMFS_COMPRESS ?= "gzip" +INITRAMFS_KEYMAP ?= "n" +INITRAMFS_NET_DEVICE ?= "" +INITRAMFS_NFSROOT ?= "auto" +INITRAMFS_RUNSIZE ?= "10%" +INITRAMFS_ROOT ?= "" +INITRAMFS_MODULE_LIST ?= "" +CREATE_NEW_INITRAMFS ?= "n" +KERNEL_PACKAGE = "${@ ("linux-image-" + d.getVar("KERNEL_NAME", True)) if d.getVar("KERNEL_NAME", True) else ""}" +DEBIAN_DEPENDS += ", ${KERNEL_PACKAGE}" +TEMPLATE_FILES = "postinst.tmpl control.tmpl postrm.tmpl" +TEMPLATE_VARS += "INITRAMFS_MODULES INITRAMFS_BUSYBOX INITRAMFS_COMPRESS \ + INITRAMFS_KEYMAP INITRAMFS_NET_DEVICE INITRAMFS_NFSROOT \ + INITRAMFS_RUNSIZE INITRAMFS_ROOT INITRAMFS_MODULE_LIST CREATE_NEW_INITRAMFS DEBIAN_DEPENDS" + + -- 2.20.1