shutdown on demand

Do not save and restore the initramfs, but instead, just unpack the
default initramfs for shutdown on shutdown.

Makefile

@@ -40,7 +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
+	install -m 0755 dracut-initramfs-restore.sh $(DESTDIR)$(pkglibdir)/dracut-initramfs-restore
 	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
@@ -50,12 +50,9 @@ install: doc
 	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; \
+		install -m 0644 dracut-shutdown.service $(DESTDIR)$(systemdsystemunitdir); \
 		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; \
+		ln -s ../dracut-shutdown.service $(DESTDIR)$(systemdsystemunitdir)/reboot.target.wants/dracut-shutdown.service; \
 	fi
 
 clean:

dracut-backup.service

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

dracut-initramfs-backup.sh

@@ -1,22 +0,0 @@
-#!/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

dracut-initramfs-restore.sh

@@ -0,0 +1,10 @@
+#!/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
+IMG="/boot/initramfs-$(uname -r).img"
+[ -f .need_shutdown -a -f "$IMG" ] || exit 1
+zcat "$IMG"  | cpio -id >/dev/null 2>&1
+rm .need_shutdown

dracut-shutdown.service

@@ -10,9 +10,9 @@ Description=Restore /run/initramfs
 After=getty@tty1.service prefdm.service
 Before=reboot.service
 DefaultDependencies=no
-ConditionPathExists=/run/initramfs/.backuped
+ConditionPathExists=/run/initramfs/.need_shutdown
 
 [Service]
-ExecStart=/usr/lib/dracut/dracut-initramfs-backup restore
+ExecStart=/usr/lib/dracut/dracut-initramfs-restore
 Type=oneshot
-RemainAfterExit=yes
+RemainAfterExit=yes

dracut.conf.d/fedora.conf.example

@@ -5,6 +5,5 @@ i18n_vars="/etc/sysconfig/keyboard:KEYTABLE-KEYMAP /etc/sysconfig/i18n:SYSFONT-F
 add_dracutmodules+=" rpmversion "
 omit_dracutmodules+=" dash "
 stdloglvl=3
-prefix=/run/initramfs
 realinitpath="/usr/lib/systemd/systemd"
 install_items+=" vi /etc/virc ps grep cat rm openvt "

dracut.spec

@@ -223,7 +223,7 @@ rm -rf $RPM_BUILD_ROOT
 %dir %{dracutlibdir}/modules.d
 %{dracutlibdir}/dracut-functions
 %{dracutlibdir}/dracut-logger
-%{dracutlibdir}/dracut-initramfs-backup
+%{dracutlibdir}/dracut-initramfs-restore
 %config(noreplace) /etc/dracut.conf
 %if 0%{?fedora} || 0%{?suse_version} || 0%{?rhel} > 6
 %config /etc/dracut.conf.d/01-dist.conf

modules.d/90crypt/cryptroot-ask.sh

@@ -117,6 +117,7 @@ unset device luksname luksfile
 # mark device as asked
 >> /tmp/cryptroot-asked-$2
 
+need_shutdown
 udevsettle
 
 exit 0

modules.d/90dmraid/dmraid.sh

@@ -40,3 +40,4 @@ else
     done
 fi
 
+need_shutdown

modules.d/90dmsquash-live/dmsquash-live-root

@@ -206,4 +206,6 @@ fi
 ln -s /dev/mapper/live-rw /dev/root
 printf '/bin/mount %s /dev/mapper/live-rw %s\n' "$ROOTFLAGS" "$NEWROOT" > $hookdir/mount/01-$$-live.sh
 
+need_shutdown
+
 exit 0

modules.d/90lvm/lvm_scan.sh

@@ -126,3 +126,5 @@ if [ "$lvmwritten" ]; then
     rm -f /etc/lvm/lvm.conf
 fi
 unset lvmwritten
+
+need_shutdown

modules.d/90mdraid/mdraid-cleanup.sh

@@ -13,11 +13,11 @@ for md in /dev/md[0-9_]*; do
         containers="$containers $md"
         continue
     fi
-    mdadm -S "$md" >/dev/null 2>&1
+    mdadm -S "$md" >/dev/null 2>&1 || need_shutdown
 done
 
 for md in $containers; do
-    mdadm -S "$md" >/dev/null 2>&1
+    mdadm -S "$md" >/dev/null 2>&1 || need_shutdown
 done
 
 unset containers udevinfo

modules.d/90multipath/multipathd.sh

@@ -5,6 +5,7 @@
 if [ -e /etc/multipath.conf ]; then
     modprobe dm-multipath
     multipathd -B || multipathd
+    need_shutdown
 else
     rm /etc/udev/rules.d/??-multipath.rules 2>/dev/null
 fi

modules.d/95fcoe/fcoe-up

@@ -46,3 +46,5 @@ elif [ "$netdriver" = "bnx2x" ]; then
 else
     echo -n "$netif" > /sys/module/fcoe/parameters/create
 fi
+
+need_shutdown

modules.d/95iscsi/iscsiroot

@@ -205,6 +205,8 @@ else
     handle_netroot $iroot
 fi
 
+need_shutdown
+
 # now we have a root filesystem somewhere in /dev/sda*
 # let the normal block handler handle root=
 exit 0

modules.d/95nbd/nbdroot

@@ -107,4 +107,5 @@ fi
 # NBD doesn't emit uevents when it gets connected, so kick it
 echo change > /sys/block/nbd0/uevent
 udevadm settle
+need_shutdown
 exit 0

modules.d/95nfs/nfsroot

@@ -106,4 +106,4 @@ echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/
 # force udevsettle to break
 > $hookdir/initqueue/work
 
-
+need_shutdown

modules.d/98usrmount/mount-usr.sh

@@ -11,6 +11,16 @@ mount_usr()
     # check, if we have to mount the /usr filesystem
     while read _dev _mp _fs _opts _rest; do
         if [ "$_mp" = "/usr" ]; then
+            case "$_dev" in
+                LABEL=*)
+                    _dev="$(echo $_dev | sed 's,/,\\x2f,g')"
+                    _dev="/dev/disk/by-label/${_dev#LABEL=}"
+		    ;;
+                UUID=*)
+                    _dev="${_dev#block:}"
+                    _dev="/dev/disk/by-uuid/${_dev#UUID=}"
+                    ;;
+            esac
             echo "$_dev ${NEWROOT}${_mp} $_fs ${_opts} $_rest"
             _usr_found="1"
             break

modules.d/99base/dracut-lib.sh

@@ -738,3 +738,7 @@ killproc() {
         fi
     done
 }
+
+need_shutdown() {
+    >/run/initramfs/.need_shutdown
+}