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Gylstorff" To: isar-users@googlegroups.com, henning.schild@siemens.com Cc: Quirin Gylstorff Subject: [PATCH v4 1/3] meta/support: Generate a custom initramfs Date: Tue, 21 Apr 2020 16:57:21 +0200 Message-Id: <20200421145723.29997-2-Quirin.Gylstorff@siemens.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200421145723.29997-1-Quirin.Gylstorff@siemens.com> References: <20200420221458.75aeadc4@md1za8fc.ad001.siemens.net> <20200421145723.29997-1-Quirin.Gylstorff@siemens.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TUID: fYVzsG3O0BwC 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 | 50 +++++++++++++++++++ .../initramfs-config/files/postrm.tmpl | 41 +++++++++++++++ .../initramfs-config/initramfs-config_0.1.bb | 32 ++++++++++++ 4 files changed, 135 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..e523906 --- /dev/null +++ b/meta/recipes-support/initramfs-config/files/postinst.tmpl @@ -0,0 +1,50 @@ +#!/bin/sh +# postinst script for initramfs-config +# +# see: dh_installdeb(1) + +set -e + +case "$1" in + configure) + 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 + + ;; + abort-upgrade|abort-remove|abort-deconfigure) + ;; + + *) + echo "postinst called with unknown argument \`$1'" >&2 + exit 1 + ;; +esac +# dh_installdeb will replace this with shell code automatically +# generated by other debhelper scripts. +#DEBHELPER# + +exit 0 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..115d9b6 --- /dev/null +++ b/meta/recipes-support/initramfs-config/files/postrm.tmpl @@ -0,0 +1,41 @@ +#!/bin/sh +# postrm script for initramfs-config +# +# see: dh_installdeb(1) + +set -e + +case "$1" in + purge|remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear) + # 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 + ;; + + *) + echo "postrm called with unknown argument \`$1'" >&2 + exit 1 + ;; +esac + +# dh_installdeb will replace this with shell code automatically +# generated by other debhelper scripts. + +#DEBHELPER# + +exit 0 diff --git a/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb b/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb new file mode 100644 index 0000000..34bb25b --- /dev/null +++ b/meta/recipes-support/initramfs-config/initramfs-config_0.1.bb @@ -0,0 +1,32 @@ +# This software is a part of ISAR. +# Copyright (C) 2020 Siemens AG +# +# SPDX-License-Identifier: MIT +inherit dpkg-raw +inherit template +DESCRIPTION = "Recipe to set the initramfs configuration and generate a new ramfs" + + +SRC_URI = "file://postinst.tmpl \ + file://postrm.tmpl \ + file://control.tmpl \ + " + +INITRAMFS_MODULES ?= "most" +INITRAMFS_BUSYBOX ?= "auto" +INITRAMFS_COMPRESS ?= "gzip" +INITRAMFS_KEYMAP ?= "n" +INITRAMFS_NET_DEVICE ?= "" +INITRAMFS_NFSROOT ?= "auto" +INITRAMFS_RUNSIZE ?= "10%" +INITRAMFS_ROOT ?= "" +INITRAMFS_MODULE_LIST ?= "" +CREATE_NEW_INITRAMFS ?= "n" +KERNEL_PACKAGE = "${@ ("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