sys-fs/zfs: more Dracut fixes

- Backport the merged version of non-root fix (one we used should be fine,
but upstream went with another)

- Revert commit which breaks dist-kernel initramfs building (breaks
with USE=initramfs on gentoo-kernel b/c zfs isn't yet rebuilt when
gentoo-kernel's pkg_postinst builds dracut).

Bug: https://github.com/openzfs/zfs/issues/13595
Bug: https://bugs.gentoo.org/854333
Signed-off-by: Sam James <sam@gentoo.org>

4 files changed, 390 insertions, 0 deletions

diff --git a/sys-fs/zfs/files/2.1.5-dracut-zfs-missing.patch b/sys-fs/zfs/files/2.1.5-dracut-zfs-missing.patch
new file mode 100644
index 000000000000..077bcd55f6d5
--- /dev/null
+++ b/sys-fs/zfs/files/2.1.5-dracut-zfs-missing.patch
@@ -0,0 +1,14 @@
+https://github.com/openzfs/zfs/commit/ebbfc6cb853d2d2f3f0671362d5ff5588be39e9d
+https://github.com/openzfs/zfs/issues/13595
+--- b/contrib/dracut/90zfs/module-setup.sh.in
++++ a/contrib/dracut/90zfs/module-setup.sh.in
+@@ -19,7 +19,7 @@
+ }
+ 
+ installkernel() {
++	instmods zfs
+-	instmods -c zfs
+ }
+ 
+ install() {
+
diff --git a/sys-fs/zfs/files/2.1.5-r2-dracut-non-root.patch b/sys-fs/zfs/files/2.1.5-r2-dracut-non-root.patch
new file mode 100644
index 000000000000..a9c6130f5b00
--- /dev/null
+++ b/sys-fs/zfs/files/2.1.5-r2-dracut-non-root.patch
@@ -0,0 +1,60 @@
+https://github.com/openzfs/zfs/commit/eefe83eaa68f7cb4a49c580dd940d3688e42c849
+https://bugs.gentoo.org/854333
+
+From eefe83eaa68f7cb4a49c580dd940d3688e42c849 Mon Sep 17 00:00:00 2001
+From: Toyam Cox <aviator45003@gmail.com>
+Date: Thu, 30 Jun 2022 13:47:58 -0400
+Subject: [PATCH] dracut: fix boot on non-zfs-root systems
+
+Simply prevent overwriting root until it needs to be overwritten.
+
+Dracut could change this value before this module is called, but won't
+change the kernel command line.
+
+Reviewed-by: Andrew J. Hesford <ajh@sideband.org>
+Signed-off-by: Toyam Cox <vaelatern@voidlinux.org>
+Closes #13592
+---
+ contrib/dracut/90zfs/zfs-lib.sh.in | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/contrib/dracut/90zfs/zfs-lib.sh.in b/contrib/dracut/90zfs/zfs-lib.sh.in
+index e44673c2d75..3a43e514d6f 100755
+--- a/contrib/dracut/90zfs/zfs-lib.sh.in
++++ b/contrib/dracut/90zfs/zfs-lib.sh.in
+@@ -88,11 +88,11 @@ decode_root_args() {
+         return
+     fi
+ 
+-    root=$(getarg root=)
++    xroot=$(getarg root=)
+     rootfstype=$(getarg rootfstype=)
+ 
+     # shellcheck disable=SC2249
+-    case "$root" in
++    case "$xroot" in
+         ""|zfs|zfs:|zfs:AUTO)
+             root=zfs:AUTO
+             rootfstype=zfs
+@@ -100,7 +100,7 @@ decode_root_args() {
+             ;;
+ 
+         ZFS=*|zfs:*)
+-            root="${root#zfs:}"
++            root="${xroot#zfs:}"
+             root="${root#ZFS=}"
+             root=$(echo "$root" | tr '+' ' ')
+             rootfstype=zfs
+@@ -109,9 +109,9 @@ decode_root_args() {
+     esac
+ 
+     if [ "$rootfstype" = "zfs" ]; then
+-        case "$root" in
++        case "$xroot" in
+             "") root=zfs:AUTO ;;
+-            *)  root=$(echo "$root" | tr '+' ' ') ;;
++            *)  root=$(echo "$xroot" | tr '+' ' ') ;;
+         esac
+         return 0
+     fi
+
diff --git a/sys-fs/zfs/zfs-2.1.5-r2.ebuild b/sys-fs/zfs/zfs-2.1.5-r2.ebuild
new file mode 100644
index 000000000000..37907ff20733
--- /dev/null
+++ b/sys-fs/zfs/zfs-2.1.5-r2.ebuild
@@ -0,0 +1,312 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DISTUTILS_OPTIONAL=1
+PYTHON_COMPAT=( python3_{8..10} )
+
+inherit autotools bash-completion-r1 dist-kernel-utils distutils-r1 flag-o-matic linux-info pam systemd udev usr-ldscript
+
+DESCRIPTION="Userland utilities for ZFS Linux kernel module"
+HOMEPAGE="https://github.com/openzfs/zfs"
+
+if [[ ${PV} == "9999" ]]; then
+	inherit git-r3 linux-mod
+	EGIT_REPO_URI="https://github.com/openzfs/zfs.git"
+else
+	VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/openzfs.asc
+	inherit verify-sig
+
+	MY_P="${P/_rc/-rc}"
+	SRC_URI="https://github.com/openzfs/${PN}/releases/download/${MY_P}/${MY_P}.tar.gz"
+	SRC_URI+=" verify-sig? ( https://github.com/openzfs/${PN}/releases/download/${MY_P}/${MY_P}.tar.gz.asc )"
+	S="${WORKDIR}/${P%_rc?}"
+
+	if [[ ${PV} != *_rc* ]]; then
+		KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv"
+	fi
+fi
+
+LICENSE="BSD-2 CDDL MIT"
+# just libzfs soname major for now.
+# possible candidates: libuutil, libzpool, libnvpair. Those do not provide stable abi, but are considered.
+# see libsoversion_check() below as well
+SLOT="0/5"
+IUSE="custom-cflags debug dist-kernel kernel-builtin minimal nls pam python +rootfs test-suite"
+
+DEPEND="
+	net-libs/libtirpc:=
+	sys-apps/util-linux
+	sys-libs/zlib
+	virtual/libudev:=
+	dev-libs/openssl:0=
+	!minimal? ( ${PYTHON_DEPS} )
+	pam? ( sys-libs/pam )
+	python? (
+		virtual/python-cffi[${PYTHON_USEDEP}]
+	)
+"
+
+BDEPEND="virtual/awk
+	virtual/pkgconfig
+	nls? ( sys-devel/gettext )
+	python? (
+		dev-python/setuptools[${PYTHON_USEDEP}]
+		|| (
+			dev-python/packaging[${PYTHON_USEDEP}]
+			dev-python/distlib[${PYTHON_USEDEP}]
+		)
+	)
+"
+
+if [[ ${PV} != "9999" ]] ; then
+	BDEPEND+=" verify-sig? ( sec-keys/openpgp-keys-openzfs )"
+fi
+
+# awk is used for some scripts, completions, and the Dracut module
+RDEPEND="${DEPEND}
+	!kernel-builtin? ( ~sys-fs/zfs-kmod-${PV}:= )
+	!prefix? ( virtual/udev )
+	sys-fs/udev-init-scripts
+	virtual/awk
+	dist-kernel? ( virtual/dist-kernel:= )
+	rootfs? (
+		app-arch/cpio
+		app-misc/pax-utils
+		!<sys-kernel/genkernel-3.5.1.1
+	)
+	test-suite? (
+		app-shells/ksh
+		sys-apps/kmod[tools]
+		sys-apps/util-linux
+		sys-devel/bc
+		sys-block/parted
+		sys-fs/lsscsi
+		sys-fs/mdadm
+		sys-process/procps
+	)
+"
+
+# PDEPEND in this form is needed to trick portage suggest
+# enabling dist-kernel if only 1 package have it set, without suggesting to disable
+PDEPEND="dist-kernel? ( ~sys-fs/zfs-kmod-${PV}[dist-kernel] )"
+
+REQUIRED_USE="
+	!minimal? ( ${PYTHON_REQUIRED_USE} )
+	python? ( !minimal )
+	test-suite? ( !minimal )
+"
+
+RESTRICT="test"
+
+PATCHES=(
+	# bug #855182
+	"${FILESDIR}"/${PV}-build-issues.patch
+	# bug #854333
+	"${FILESDIR}"/${PV}-r2-dracut-non-root.patch
+	#
+	"${FILESDIR}"/2.1.5-dracut-zfs-missing.patch
+)
+
+pkg_pretend() {
+	use rootfs || return 0
+
+	if has_version virtual/dist-kernel && ! use dist-kernel; then
+		ewarn "You have virtual/dist-kernel installed, but"
+		ewarn "USE=\"dist-kernel\" is not enabled for ${CATEGORY}/${PN}"
+		ewarn "It's recommended to globally enable dist-kernel USE flag"
+		ewarn "to auto-trigger initrd rebuilds with kernel updates"
+	fi
+}
+
+pkg_setup() {
+	if use kernel_linux; then
+		linux-info_pkg_setup
+
+		if ! linux_config_exists; then
+			ewarn "Cannot check the linux kernel configuration."
+		else
+			if use test-suite; then
+				if linux_chkconfig_present BLK_DEV_LOOP; then
+					eerror "The ZFS test suite requires loop device support enabled."
+					eerror "Please enable it:"
+					eerror "    CONFIG_BLK_DEV_LOOP=y"
+					eerror "in /usr/src/linux/.config or"
+					eerror "    Device Drivers --->"
+					eerror "        Block devices --->"
+					eerror "            [X] Loopback device support"
+				fi
+			fi
+		fi
+	fi
+}
+
+libsoversion_check() {
+	local bugurl libzfs_sover
+	bugurl="https://bugs.gentoo.org/enter_bug.cgi?form_name=enter_bug&product=Gentoo+Linux&component=Current+packages"
+
+	libzfs_sover="$(grep 'libzfs_la_LDFLAGS += -version-info' lib/libzfs/Makefile.am \
+		| grep -Eo '[0-9]+:[0-9]+:[0-9]+')"
+	libzfs_sover="${libzfs_sover%%:*}"
+
+	if [[ ${libzfs_sover} -ne $(ver_cut 2 ${SLOT}) ]]; then
+		echo
+		eerror "BUG BUG BUG BUG BUG BUG BUG BUG"
+		eerror "ebuild subslot does not match libzfs soversion!"
+		eerror "libzfs soversion: ${libzfs_sover}"
+		eerror "ebuild value: $(ver_cut 2 ${SLOT})"
+		eerror "This is a bug in the ebuild, please use the following URL to report it"
+		eerror "${bugurl}&short_desc=${CATEGORY}%2F${P}+update+subslot"
+		echo
+		# we want to abort for releases, but just print a warning for live ebuild
+		# to keep package installable
+		[[  ${PV} == "9999" ]] || die
+	fi
+}
+
+src_prepare() {
+	default
+	libsoversion_check
+
+	# Run unconditionally (bug #792627)
+	eautoreconf
+
+	if [[ ${PV} != "9999" ]]; then
+		# Set revision number
+		sed -i "s/\(Release:\)\(.*\)1/\1\2${PR}-gentoo/" META || die "Could not set Gentoo release"
+	fi
+
+	if use python; then
+		pushd contrib/pyzfs >/dev/null || die
+		distutils-r1_src_prepare
+		popd >/dev/null || die
+	fi
+
+	# prevent errors showing up on zfs-mount stop, #647688
+	# openrc will unmount all filesystems anyway.
+	sed -i "/^ZFS_UNMOUNT=/ s/yes/no/" "etc/default/zfs.in" || die
+}
+
+src_configure() {
+	use custom-cflags || strip-flags
+	use minimal || python_setup
+
+	local myconf=(
+		--bindir="${EPREFIX}/bin"
+		--enable-shared
+		--enable-sysvinit
+		--localstatedir="${EPREFIX}/var"
+		--sbindir="${EPREFIX}/sbin"
+		--with-config=user
+		--with-dracutdir="${EPREFIX}/usr/lib/dracut"
+		--with-linux="${KV_DIR}"
+		--with-linux-obj="${KV_OUT_DIR}"
+		--with-udevdir="$(get_udevdir)"
+		--with-pamconfigsdir="${EPREFIX}/unwanted_files"
+		--with-pammoduledir="$(getpam_mod_dir)"
+		--with-systemdunitdir="$(systemd_get_systemunitdir)"
+		--with-systemdpresetdir="$(systemd_get_systempresetdir)"
+		--with-vendor=gentoo
+		# Building zfs-mount-generator.c on musl breaks as strndupa
+		# isn't available. But systemd doesn't support musl anyway, so
+		# just disable building it.
+		$(use_enable !elibc_musl systemd)
+		$(use_enable debug)
+		$(use_enable nls)
+		$(use_enable pam)
+		$(use_enable python pyzfs)
+		--disable-static
+		$(usex minimal --without-python --with-python="${EPYTHON}")
+	)
+
+	econf "${myconf[@]}"
+}
+
+src_compile() {
+	default
+	if use python; then
+		pushd contrib/pyzfs >/dev/null || die
+		distutils-r1_src_compile
+		popd >/dev/null || die
+	fi
+}
+
+src_install() {
+	default
+
+	gen_usr_ldscript -a nvpair uutil zfsbootenv zfs zfs_core zpool
+
+	use pam && { rm -rv "${ED}/unwanted_files" || die ; }
+
+	use test-suite || { rm -r "${ED}"/usr/share/zfs/{test-runner,zfs-tests,runfiles,*sh} || die ; }
+
+	find "${ED}" -name '*.la' -delete || die
+
+	dobashcomp contrib/bash_completion.d/zfs
+	bashcomp_alias zfs zpool
+
+	# strip executable bit from conf.d file
+	fperms 0644 /etc/conf.d/zfs
+
+	if use python; then
+		pushd contrib/pyzfs >/dev/null || die
+		distutils-r1_src_install
+		popd >/dev/null || die
+	fi
+
+	# enforce best available python implementation
+	use minimal || python_fix_shebang "${ED}/bin"
+}
+
+pkg_postinst() {
+	udev_reload
+
+	# we always need userspace utils in sync with zfs-kmod
+	# so force initrd update for userspace as well, to avoid
+	# situation when zfs-kmod trigger initrd rebuild before
+	# userspace component is rebuilt
+	# KV_* variables are provided by linux-info.eclass
+	if [[ -z ${ROOT} ]] && use dist-kernel; then
+		dist-kernel_reinstall_initramfs "${KV_DIR}" "${KV_FULL}"
+	fi
+
+	if use rootfs; then
+		if ! has_version sys-kernel/genkernel && ! has_version sys-kernel/dracut; then
+			elog "Root on zfs requires an initramfs to boot"
+			elog "The following packages provide one and are tested on a regular basis:"
+			elog "  sys-kernel/dracut ( preferred, module maintained by zfs developers )"
+			elog "  sys-kernel/genkernel"
+		fi
+	fi
+
+	if ! use kernel-builtin && [[ ${PV} == "9999" ]]; then
+		einfo "Adding ${P} to the module database to ensure that the"
+		einfo "kernel modules and userland utilities stay in sync."
+		update_moduledb
+	fi
+
+	if systemd_is_booted || has_version sys-apps/systemd; then
+		einfo "Please refer to ${EROOT}/$(systemd_get_systempresetdir)/50-zfs.preset"
+		einfo "for default zfs systemd service configuration"
+	else
+		[[ -e "${EROOT}/etc/runlevels/boot/zfs-import" ]] || \
+			einfo "You should add zfs-import to the boot runlevel."
+		[[ -e "${EROOT}/etc/runlevels/boot/zfs-load-key" ]] || \
+			einfo "You should add zfs-load-key to the boot runlevel."
+		[[ -e "${EROOT}/etc/runlevels/boot/zfs-mount" ]]|| \
+			einfo "You should add zfs-mount to the boot runlevel."
+		[[ -e "${EROOT}/etc/runlevels/default/zfs-share" ]] || \
+			einfo "You should add zfs-share to the default runlevel."
+		[[ -e "${EROOT}/etc/runlevels/default/zfs-zed" ]] || \
+			einfo "You should add zfs-zed to the default runlevel."
+	fi
+}
+
+pkg_postrm() {
+	udev_reload
+
+	if ! use kernel-builtin && [[ ${PV} == "9999" ]]; then
+		remove_moduledb
+	fi
+}
diff --git a/sys-fs/zfs/zfs-9999.ebuild b/sys-fs/zfs/zfs-9999.ebuild
index 6e0b78a9c125..b3a9d416fb6e 100644
--- a/sys-fs/zfs/zfs-9999.ebuild
+++ b/sys-fs/zfs/zfs-9999.ebuild
@@ -100,6 +100,10 @@ REQUIRED_USE="
 
 RESTRICT="test"
 
+PATCHES=(
+	"${FILESDIR}"/2.1.5-dracut-zfs-missing.patch
+)
+
 pkg_pretend() {
 	use rootfs || return 0