sd-zfs.initcpio.install

#!/bin/bash

build() {
	local applet

	# add parts of base hook:
	# - busybox with applet symlinks
	# - kmod with applet symlinks
	# - blkid
	add_binary /usr/lib/initcpio/busybox /usr/bin/busybox
	for applet in $(/usr/lib/initcpio/busybox --list); do
		# do not add busybox symlinks over potentially real binaries
		# (e.g. setfont added by sd-vconsole)
		[[ -e "$BUILDROOT/usr/bin/$applet" ]] || \
			add_symlink "/usr/bin/$applet" busybox
	done
	add_binary kmod
	for applet in {dep,ins,rm,ls}mod mod{probe,info}; do
		# these are the "real" things, no check is needed
		add_symlink "/usr/bin/$applet" kmod
	done
	add_binary blkid

	# Kernel modules
	map add_module \
		zfs \
		spl \

	# udev rules
	map add_file \
		/usr/lib/udev/rules.d/60-zvol.rules \
		/usr/lib/udev/rules.d/69-vdev.rules \
		/usr/lib/udev/rules.d/90-zfs.rules \

	# systemd units
	map add_systemd_unit \
		systemd-udev-settle.service \

	# ZFS binaries
	map add_binary \
		zpool \
		zfs \
		mount.zfs \
		/usr/lib/udev/vdev_id \
		/usr/lib/udev/zvol_id \

	# Generator and support scripts
	add_file /usr/lib/zfs/initcpio/zfs-root-generator /usr/lib/systemd/system-generators/
	map add_file \
		/usr/lib/zfs/initcpio/zfs-functions \
		/usr/lib/zfs/initcpio/zfs-parse-cmdline \
		/usr/lib/zfs/initcpio/zfs-prepare-rootfs \

	# support binaries (tools) not part of busybox
	# XXX: get rid of xargs (ask mkinitcpio-busybox to build xargs)
	# XXX: get rid of stdbuf (debugging hack)
	map add_binary \
		systemd-escape \
		xargs \
		stdbuf \
		/usr/lib/coreutils/libstdbuf.so \

	# ZFS-relevant configuration files
	local copied_files=(
		# /etc/zfs/zpool.cache
		# /etc/modprobe.d/{spl,zfs}.conf
		/etc/hostid
	)
	for f in "${copied_files[@]}"; do
		if [[ -e "$f" ]]; then
			add_file "$f"
		fi
	done

	# Synthesize hostid if necessary
	if [[ ! -e /etc/hostid ]]; then
		zgenhostid -o "${BUILDROOT}/etc/hostid" "$(hostid)"
	fi
}

help() {
	cat << EOF
This hook adds ZFS support for systemd-based initrd.
It has a hard dependency on the systemd hook. Since it's implemented
using shell scripts, it still requires busybox and will copy it to
the initrd if you don't have the base hook.

To use this hook, simply add it to your HOOKS array in mkinitcpio.conf.
You'll also need to change the kernel command line. The supported cmdline
formats are:
  1. root=zfs, which imports all pools in initrd, searches for the
     first pool with the bootfs property set, and then mounts bootfs as root.
  2. root=zfs:poolname, which imports only the specified pool and then mounts
     the pool's bootfs as root.
  3. root=zfs:poolname/dataset, which imports only the specified pool and then
     mounts the specified dataset as root.
EOF
}

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