From 4cfd24d1799fafacf6624c9638454de93dd6f331 Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Fri, 10 Feb 2012 09:37:18 +0100

Subject: [PATCH] Backup and restore /run/initramfs via systemd services

This saves the space /run/initramfs is taking for the shutdown

---

 Makefile                   |   16 ++++++++++++++--

 dracut-backup.service      |   15 +++++++++++++++

 dracut-initramfs-backup.sh |   22 ++++++++++++++++++++++

 dracut-restore.service     |   18 ++++++++++++++++++

 dracut.spec                |   13 ++++++++++++-

 5 files changed, 81 insertions(+), 3 deletions(-)

 create mode 100644 dracut-backup.service

 create mode 100644 dracut-initramfs-backup.sh

 create mode 100644 dracut-restore.service

diff --git a/Makefile b/Makefile

index 8d7b7d6..09e87c8 100644

--- a/Makefile

+++ b/Makefile

@@ -40,6 +40,7 @@ install: doc

 	mkdir -p $(DESTDIR)$(sysconfdir)/dracut.conf.d

 	install -m 0755 dracut-functions $(DESTDIR)$(pkglibdir)/dracut-functions

 	install -m 0755 dracut-logger $(DESTDIR)$(pkglibdir)/dracut-logger

+	install -m 0755 dracut-initramfs-backup.sh $(DESTDIR)$(pkglibdir)/dracut-initramfs-backup

 	cp -arx modules.d $(DESTDIR)$(pkglibdir)

 	install -m 0644 dracut.8 $(DESTDIR)$(mandir)/man8/dracut.8

 	install -m 0644 dracut-catimages.8 $(DESTDIR)$(mandir)/man8/dracut-catimages.8

@@ -47,6 +48,15 @@ install: doc

 	install -m 0644 dracut.conf.5 $(DESTDIR)$(mandir)/man5/dracut.conf.5

 	install -m 0644 dracut.cmdline.7 $(DESTDIR)$(mandir)/man7/dracut.cmdline.7

 	ln -s dracut.cmdline.7 $(DESTDIR)$(mandir)/man7/dracut.kernel.7

+	if [ -n "$(systemdsystemunitdir)" ]; then \

+		mkdir -p $(DESTDIR)$(systemdsystemunitdir); \

+		install -m 0644 dracut-backup.service $(DESTDIR)$(systemdsystemunitdir); \

+		install -m 0644 dracut-restore.service $(DESTDIR)$(systemdsystemunitdir); \

+		mkdir -p $(DESTDIR)$(systemdsystemunitdir)/sysinit.target.wants; \

+		mkdir -p $(DESTDIR)$(systemdsystemunitdir)/reboot.target.wants; \

+		ln -s ../dracut-backup.service $(DESTDIR)$(systemdsystemunitdir)/sysinit.target.wants/dracut-backup.service; \

+		ln -s ../dracut-restore.service $(DESTDIR)$(systemdsystemunitdir)/reboot.target.wants/dracut-restore.service; \

+	fi

 clean:

 	$(RM) *~

@@ -77,12 +87,14 @@ rpm: dracut-$(VERSION).tar.bz2

 	( mv "$$rpmbuild"/noarch/*.rpm .; mv "$$rpmbuild"/*.src.rpm .;rm -fr "$$rpmbuild"; ls *.rpm )

 syncheck:

-	@ret=0;for i in dracut-logger modules.d/99base/init modules.d/*/*.sh; do \

+	@ret=0;for i in dracut-initramfs-backup.sh dracut-logger \

+                        modules.d/99base/init modules.d/*/*.sh; do \

                 [ "$${i##*/}" = "module-setup.sh" ] && continue; \

                 [ "$${i##*/}" = "caps.sh" ] && continue; \

 		dash -n "$$i" ; ret=$$(($$ret+$$?)); \

 	done;exit $$ret

-	@ret=0;for i in dracut modules.d/02caps/caps.sh modules.d/*/module-setup.sh; do \

+	@ret=0;for i in mkinitrd-dracut.sh dracut modules.d/02caps/caps.sh \

+	                modules.d/*/module-setup.sh; do \

 		bash -n "$$i" ; ret=$$(($$ret+$$?)); \

 	done;exit $$ret

diff --git a/dracut-backup.service b/dracut-backup.service

new file mode 100644

index 0000000..69110eb

--- /dev/null

+++ b/dracut-backup.service

@@ -0,0 +1,15 @@

+#  This file is part of systemd.

+#

+#  systemd is free software; you can redistribute it and/or modify it

+#  under the terms of the GNU General Public License as published by

+#  the Free Software Foundation; either version 2 of the License, or

+#  (at your option) any later version.

+

+[Unit]

+Description=Save /run/initramfs

+ConditionPathExists=/run/initramfs

+

+[Service]

+ExecStart=/usr/lib/dracut/dracut-initramfs-backup backup

+Type=oneshot

+RemainAfterExit=yes

diff --git a/dracut-initramfs-backup.sh b/dracut-initramfs-backup.sh

new file mode 100644

index 0000000..7320d40

--- /dev/null

+++ b/dracut-initramfs-backup.sh

@@ -0,0 +1,22 @@

+#!/bin/sh

+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-

+# ex: ts=8 sw=4 sts=4 et filetype=sh

+

+set -e

+cd /run/initramfs

+

+if [ "x$1" = "xbackup" ]; then

+    compress="gzip"

+    command -v pigz > /dev/null 2>&1 && compress="pigz"

+    find . |cpio -H newc -o --quiet \

+        | pigz > /var/lib/initramfs/_run_initramfs-backup.cpio.gz

+    mv -f /var/lib/initramfs/_run_initramfs-backup.cpio.gz \

+        /var/lib/initramfs/run_initramfs-backup.cpio.gz

+    rm -fr etc bin lib lib64 sbin shutdown tmp usr var

+    > .backuped

+elif [ "x$1" = "xrestore" ]; then

+    [ -f .backuped -a -f /var/lib/initramfs/run_initramfs-backup.cpio.gz ] || exit 1

+    zcat /var/lib/initramfs/run_initramfs-backup.cpio.gz  | cpio -id >/dev/null 2>&1

+    rm .backuped

+    rm -f /var/lib/initramfs/run_initramfs-backup.cpio.gz

+fi

diff --git a/dracut-restore.service b/dracut-restore.service

new file mode 100644

index 0000000..3a07efe

--- /dev/null

+++ b/dracut-restore.service

@@ -0,0 +1,18 @@

+#  This file is part of systemd.

+#

+#  systemd is free software; you can redistribute it and/or modify it

+#  under the terms of the GNU General Public License as published by

+#  the Free Software Foundation; either version 2 of the License, or

+#  (at your option) any later version.

+

+[Unit]

+Description=Restore /run/initramfs

+After=getty@tty1.service prefdm.service

+Before=reboot.service

+DefaultDependencies=no

+ConditionPathExists=/run/initramfs/.backuped

+

+[Service]

+ExecStart=/usr/lib/dracut/dracut-initramfs-backup restore

+Type=oneshot

+RemainAfterExit=yes

\ No newline at end of file

diff --git a/dracut.spec b/dracut.spec

index 1b0b76b..6efd553 100644

--- a/dracut.spec

+++ b/dracut.spec

@@ -27,6 +27,7 @@ Source0: http://www.kernel.org/pub/linux/utils/boot/dracut/dracut-%{version}.tar

 BuildArch: noarch

 BuildRequires: dash bash git

+

 %if 0%{?fedora} || 0%{?rhel} > 6

 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)

 %endif

@@ -51,6 +52,10 @@ Obsoletes: nash <= 6.0.93

 Obsoletes: libbdevid-python <= 6.0.93

 %endif

+%if 0%{?fedora} > 16 || 0%{?rhel} > 6

+BuildRequires: systemd-units

+%endif

+

 %if 0%{?suse_version} > 9999

 Obsoletes: mkinitrd < 2.6.1

 Provides: mkinitrd = 2.6.1

@@ -161,7 +166,8 @@ rm -rf $RPM_BUILD_ROOT

 make install DESTDIR=$RPM_BUILD_ROOT \

      libdir=%{_prefix}/lib \

      bindir=%{_bindir} \

-     sysconfdir=/etc mandir=%{_mandir}

+     sysconfdir=/etc mandir=%{_mandir} \

+     systemdsystemunitdir=%{_unitdir}

 echo %{name}-%{version}-%{release} > $RPM_BUILD_ROOT/%{dracutlibdir}/modules.d/10rpmversion/dracut-version

@@ -217,6 +223,7 @@ rm -rf $RPM_BUILD_ROOT

 %dir %{dracutlibdir}/modules.d

 %{dracutlibdir}/dracut-functions

 %{dracutlibdir}/dracut-logger

+%{dracutlibdir}/dracut-initramfs-backup

 %config(noreplace) /etc/dracut.conf

 %if 0%{?fedora} || 0%{?suse_version} || 0%{?rhel} > 6

 %config /etc/dracut.conf.d/01-dist.conf

@@ -266,6 +273,10 @@ rm -rf $RPM_BUILD_ROOT

 %config(noreplace) /etc/logrotate.d/dracut_log

 %attr(0644,root,root) %ghost %config(missingok,noreplace) %{_localstatedir}/log/dracut.log

 %dir %{_sharedstatedir}/initramfs

+%if 0%{?fedora} > 16 || 0%{?rhel} > 6

+%{_unitdir}/*.service

+%{_unitdir}/*/*.service

+%endif

 %files network

 %defattr(-,root,root,0755)