systemd-stable/units/initrd-switch-root.target

#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Switch Root
ConditionPathExists=/etc/initrd-release
DefaultDependencies=no
Requires=initrd-switch-root.service
Before=initrd-switch-root.service
AllowIsolate=yes
Wants=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target systemd-journald.service
After=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target emergency.service emergency.target
initrd: add unit files needed for basic systemd-in-initrd support This will: * mount all configured filesystems (typically the rootfs on /sysroot) * reload the configuration to pick up anything from the mounted fs (typically /sysroot/etc/fstab) * mount any newly configured filesystems (typically /usr on /sysroot/usr, if applicable) * shut-down and clean-up any daemons running in the initramfs (typically udevd) * switch-root to /sysroot and start the real init For an example of what files should be included in an initramfs based on this see <https://mailman.archlinux.org/pipermail/arch-projects/2013-February/003628.html>. Cc: Harald Hoyer <harald.hoyer@gmail.com> Cc: Dave Reisner <d@falconindy.com> 2013-02-24 20:40:36 +04:00			`# This file is part of systemd.`
			`#`
			`# systemd is free software; you can redistribute it and/or modify it`
			`# under the terms of the GNU Lesser General Public License as published by`
			`# the Free Software Foundation; either version 2.1 of the License, or`
			`# (at your option) any later version.`

			`[Unit]`
			`Description=Switch Root`
			`ConditionPathExists=/etc/initrd-release`
			`DefaultDependencies=no`
			`Requires=initrd-switch-root.service`
			`Before=initrd-switch-root.service`
			`AllowIsolate=yes`
Make initrd.target the default target in the initrd First, rename root-fs.target to initrd-root-fs.target to clarify its usage. Mount units with "x-initrd-rootfs.mount" are now ordered before initrd-root-fs.target. As we sometimes construct /sysroot mounts in /etc/fstab in the initrd, we want these to be mounted before the initrd-root-fs.target is active. initrd.target can be the default target in the initrd. (normal startup) : : v basic.target \| ______________________/\| / \| \| sysroot.mount \| \| \| v \| initrd-root-fs.target \| \| \| v \| initrd-parse-etc.service (custom initrd services) \| \| v \| (sysroot-usr.mount and \| various mounts marked \| with fstab option \| x-initrd.mount) \| \| \| v \| initrd-fs.target \| \| \______________________ \| \\| v initrd.target \| v initrd-cleanup.service isolates to initrd-switch-root.target \| v ______________________/\| / \| \| initrd-udevadm-cleanup-db.service \| \| (custom initrd services) \| \| \| \______________________ \| \\| v initrd-switch-root.target \| v initrd-switch-root.service \| v switch-root 2013-03-14 16:12:10 +04:00			`Wants=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target systemd-journald.service`
			`After=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target emergency.service emergency.target`