dracut: Provide minimalistic initramfs files - no udev, no systemd
Provide simple script to run under busybox, this is all we need in the VM.
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parent
c64b94e9d6
commit
15cc3b2d51
@ -1,4 +1,3 @@
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install:
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install -d $(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm
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install module-setup.sh mount_modules.sh qubes_cow_setup.sh \
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$(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm/
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$(MAKE) -C simple
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$(MAKE) -C full
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4
dracut/full/Makefile
Normal file
4
dracut/full/Makefile
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@ -0,0 +1,4 @@
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install:
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install -d $(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm
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install module-setup.sh mount_modules.sh qubes_cow_setup.sh \
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$(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm/
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@ -11,3 +11,4 @@ if ! [ -d $NEWROOT/lib/modules/`uname -r` ]; then
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mount -n -t ext3 /dev/xvdd $NEWROOT/lib/modules
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fi
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killall udevd systemd-udevd
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4
dracut/simple/Makefile
Normal file
4
dracut/simple/Makefile
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@ -0,0 +1,4 @@
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install:
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install -d $(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm-simple
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install module-setup.sh init.sh \
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$(DESTDIR)/usr/lib/dracut/modules.d/90qubes-vm-simple/
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48
dracut/simple/init.sh
Normal file
48
dracut/simple/init.sh
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@ -0,0 +1,48 @@
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#!/bin/sh
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echo "Qubes initramfs script here:"
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mkdir -p /proc /sys /dev
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs devtmpfs /dev
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if [ -e /dev/mapper/dmroot ] ; then
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die "Qubes: FATAL error: /dev/mapper/dmroot already exists?!"
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fi
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modprobe xenblk || modprobe xen-blkfront || echo "Qubes: Cannot load Xen Block Frontend..."
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echo "Waiting for /dev/xvda* devices..."
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while ! [ -e /dev/xvda ]; do sleep 0.1; done
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if [ `cat /sys/block/xvda/ro` = 1 ] ; then
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echo "Qubes: Doing COW setup for AppVM..."
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while ! [ -e /dev/xvdc ]; do sleep 0.1; done
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while ! [ -e /dev/xvdc2 ]; do sleep 0.1; done
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echo "0 `cat /sys/block/xvda/size` snapshot /dev/xvda /dev/xvdc2 N 16" | \
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dmsetup create dmroot || { echo "Qubes: FATAL: cannot create dmroot!"; }
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echo Qubes: done.
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else
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echo "Qubes: Doing R/W setup for TemplateVM..."
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echo "0 `cat /sys/block/xvda/size` linear /dev/xvda 0" | \
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dmsetup create dmroot || { echo "Qubes: FATAL: cannot create dmroot!"; exit 1; }
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echo Qubes: done.
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fi
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dmsetup mknodes dmroot
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mkdir -p /sysroot
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mount /dev/mapper/dmroot /sysroot -o ro
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if ! [ -d $NEWROOT/lib/modules/`uname -r` ]; then
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echo "Waiting for /dev/xvdd device..."
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while ! [ -e /dev/xvdd ]; do sleep 0.1; done
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mount -n -t ext3 /dev/xvdd $NEWROOT/lib/modules
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fi
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umount /dev /sys /proc
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exec switch_root /sysroot /sbin/init
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14
dracut/simple/module-setup.sh
Normal file
14
dracut/simple/module-setup.sh
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@ -0,0 +1,14 @@
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#!/bin/bash
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check() {
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return 255
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}
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depends() {
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echo busybox dm
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return 0
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}
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install() {
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inst $moddir/init.sh /init
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}
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@ -28,7 +28,7 @@ basedir=/var/lib/qubes/vm-kernels
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function recompile_u2mfn() {
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kver=$1
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u2mfn_ver=`dkms status u2mfn|tail -n 1|cut -f 2 -d ' '|tr -d ':,'`
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dkms install u2mfn/$u2mfn_ver -k $kver
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dkms install u2mfn/$u2mfn_ver -k $kver --no-initrd
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}
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function build_modules_img() {
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@ -50,8 +50,8 @@ function build_initramfs() {
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output_file=$2
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/sbin/dracut --nomdadmconf --nolvmconf --force \
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--modules "bash dm kernel-modules rootfs-block base fs-lib shutdown" \
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--modules "qubes-vm" --conf /dev/null --confdir /var/empty \
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--modules "kernel-modules qubes-vm-simple" \
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--conf /dev/null --confdir /var/empty \
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-d "xenblk xen-blkfront cdrom ext4 jbd2 crc16 dm_snapshot" \
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$output_file $kver
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}
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@ -34,6 +34,7 @@ URL: http://www.qubes-os.org
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Requires: dracut
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Requires: dkms
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Requires: busybox
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%define _builddir %(pwd)
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@ -60,6 +61,7 @@ make install-kernel-support DESTDIR=%{buildroot}
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%files
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/usr/lib/dracut/modules.d/90qubes-vm
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/usr/lib/dracut/modules.d/90qubes-vm-simple
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/usr/src/u2mfn-%{version}/
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/usr/sbin/qubes-prepare-vm-kernel
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