sys-fs/zfs-kmod: backport various fixes

Mostly build fixes (https://github.com/openzfs/zfs/pull/13684)
but also https://github.com/openzfs/zfs/pull/13714.

All from upstream zfs-2.1.6-staging branch.

Temporarily unkeyworded.

Bug: https://bugs.gentoo.org/855182
Bug: https://bugs.gentoo.org/863212
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 222 insertions, 0 deletions

diff --git a/sys-fs/zfs-kmod/Manifest b/sys-fs/zfs-kmod/Manifest
index 8d6ae4d6ba30..7b982f51e740 100644
--- a/sys-fs/zfs-kmod/Manifest
+++ b/sys-fs/zfs-kmod/Manifest
@@ -2,5 +2,6 @@ DIST zfs-2.0.7.tar.gz 14550055 BLAKE2B 80f7297f04a21cd8f3f2043d895b0325512ba0cea
 DIST zfs-2.0.7.tar.gz.asc 836 BLAKE2B 65e7df58c33ccadc4e0ca9dbc1e8c006abbec8442e2da50872a1ab0cbb841fc45152298e8d3b93ee4320ddae6416e3a856caf80d8efb21b19db53dfedbf00e38 SHA512 b901d8e92faa6cfe6010bd54de88c7d18057f434cb07f8a89672d6c446a0a97b23209ee8f02cfd3b2a8f431c68ec977e7dc9f95fe5d385dba0bb6d37338ba682
 DIST zfs-2.1.4.tar.gz 34896310 BLAKE2B be303f1181f604770536aa4aa61d5319ec408abbd04964cedadd15b3101a15deba6539bb5d833f4fed357f323d74f622d035305df699b213df41ae45bffdd200 SHA512 c7b57c43fc287b22905067ab022df4133d32e1a5dc335f7baf743b4ef88f64c2bf9d41318c2083230d077dd49e68f7d9e6172266e13d4b1eee29d359860f969e
 DIST zfs-2.1.4.tar.gz.asc 836 BLAKE2B b311730f72d534c87a782515f35a354bfbefba0513dc0cee5b0b497cf742590f13be6a49ff8a70d7d6503d0ba06b0266e7d290d718337add614812c3d1b0731a SHA512 53880cd5369f468551bab685eb83739ed76aa286886fdd2cbad4270755fe809da730082a91bba61011f59594fac297ce05645ae32c2c73b4a9aa835f2991a1ee
+DIST zfs-2.1.5-patches.tar.xz 13324 BLAKE2B bfef8abd298cebd54491272b8c1deacace901d9a1acce67cb927bab6447eafd985352fd09f64336aa9d6611bab0e5c761d7973f0a65c408d77bb735a94c60253 SHA512 d2b009664f8eb4f2a8596693011fde578b6eae123c6169e5dfb70bd920c0f987f5177f7b1be008705a421574a8a9bc930f99823785c69e81573f18b0350cb9bd
 DIST zfs-2.1.5.tar.gz 34951632 BLAKE2B c6e3efd9c0cda91654767eaad0eaaa05cd9a5daf1cb0384c9c78b30062f5c29142ac37ab9dbdaf96c91456d11c317d782d3524ade293f03fda983e5992b79e49 SHA512 d9ccf1049cefa9167d25f71fbdca70092cd02368b60f09341e6489fb68dc5f89e87b026b0191f4d81181a8851449124d824a1d959d0e2fb29c8a3d624edc4f03
 DIST zfs-2.1.5.tar.gz.asc 836 BLAKE2B 4a81c266967540850a2cc824e79555ca9d05b2e17e45fa2723893cbd85b55e3d7d791986d6667b7ee1530e7692c03818f15e8b6798393b54989f90801b775786 SHA512 224b0dcf4982c63a8eff0a39d054537e7d023f7c35e154e4d20490b8daf184c076bc8e4de7d2c5af4059f8a802b747e637aad4479cd8d1330cf5b26da2f19c94
diff --git a/sys-fs/zfs-kmod/zfs-kmod-2.1.5-r1.ebuild b/sys-fs/zfs-kmod/zfs-kmod-2.1.5-r1.ebuild
new file mode 100644
index 000000000000..eae6fb587434
--- /dev/null
+++ b/sys-fs/zfs-kmod/zfs-kmod-2.1.5-r1.ebuild
@@ -0,0 +1,221 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools dist-kernel-utils flag-o-matic linux-mod toolchain-funcs
+
+DESCRIPTION="Linux ZFS kernel module for sys-fs/zfs"
+HOMEPAGE="https://github.com/openzfs/zfs"
+
+if [[ ${PV} == "9999" ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/openzfs/zfs.git"
+else
+	VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/openzfs.asc
+	inherit verify-sig
+
+	MY_PV="${PV/_rc/-rc}"
+	SRC_URI="https://github.com/openzfs/zfs/releases/download/zfs-${MY_PV}/zfs-${MY_PV}.tar.gz"
+	SRC_URI+=" https://dev.gentoo.org/~sam/distfiles/sys-fs/zfs/${P/-kmod}-patches.tar.xz"
+	SRC_URI+=" verify-sig? ( https://github.com/openzfs/zfs/releases/download/zfs-${MY_PV}/zfs-${MY_PV}.tar.gz.asc )"
+	S="${WORKDIR}/zfs-${PV%_rc?}"
+	ZFS_KERNEL_COMPAT="5.18"
+
+	#  increments minor eg 5.14 -> 5.15, and still supports override.
+	ZFS_KERNEL_DEP="${ZFS_KERNEL_COMPAT_OVERRIDE:-${ZFS_KERNEL_COMPAT}}"
+	ZFS_KERNEL_DEP="${ZFS_KERNEL_DEP%%.*}.$(( ${ZFS_KERNEL_DEP##*.} + 1))"
+
+	# Unkeyworded briefly for testing
+	#if [[ ${PV} != *_rc* ]]; then
+	#	KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv"
+	#fi
+fi
+
+LICENSE="CDDL MIT debug? ( GPL-2+ )"
+SLOT="0/${PVR}"
+IUSE="custom-cflags debug +rootfs"
+
+RDEPEND="${DEPEND}
+	!sys-kernel/spl
+"
+
+BDEPEND="
+	dev-lang/perl
+	virtual/awk
+"
+
+# we want dist-kernel block in BDEPEND because of portage resolver.
+# since linux-mod.eclass already sets version-unbounded dep, portage
+# will pull new versions. So we set it in BDEPEND which takes priority.
+# and we don't need in in git ebuild.
+if [[ ${PV} != "9999" ]] ; then
+	BDEPEND+="
+		verify-sig? ( sec-keys/openpgp-keys-openzfs )
+		dist-kernel? ( <virtual/dist-kernel-${ZFS_KERNEL_DEP}:= )
+	"
+fi
+
+# PDEPEND in this form is needed to trick portage suggest
+# enabling dist-kernel if only 1 package have it set
+PDEPEND="dist-kernel? ( ~sys-fs/zfs-${PV}[dist-kernel] )"
+
+RESTRICT="debug? ( strip ) test"
+
+DOCS=( AUTHORS COPYRIGHT META README.md )
+
+PATCHES=(
+	# bug #863212, bug #855182
+	"${WORKDIR}"/${P/-kmod}-patches/
+)
+
+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() {
+	CONFIG_CHECK="
+		!DEBUG_LOCK_ALLOC
+		EFI_PARTITION
+		MODULES
+		!PAX_KERNEXEC_PLUGIN_METHOD_OR
+		!TRIM_UNUSED_KSYMS
+		ZLIB_DEFLATE
+		ZLIB_INFLATE
+	"
+
+	use debug && CONFIG_CHECK="${CONFIG_CHECK}
+		FRAME_POINTER
+		DEBUG_INFO
+		!DEBUG_INFO_REDUCED
+	"
+
+	use rootfs && \
+		CONFIG_CHECK="${CONFIG_CHECK}
+			BLK_DEV_INITRD
+			DEVTMPFS
+	"
+
+	kernel_is -lt 5 && CONFIG_CHECK="${CONFIG_CHECK} IOSCHED_NOOP"
+
+	if [[ ${PV} != "9999" ]]; then
+		local kv_major_max kv_minor_max zcompat
+		zcompat="${ZFS_KERNEL_COMPAT_OVERRIDE:-${ZFS_KERNEL_COMPAT}}"
+		kv_major_max="${zcompat%%.*}"
+		zcompat="${zcompat#*.}"
+		kv_minor_max="${zcompat%%.*}"
+		kernel_is -le "${kv_major_max}" "${kv_minor_max}" || die \
+			"Linux ${kv_major_max}.${kv_minor_max} is the latest supported version"
+
+	fi
+
+	kernel_is -ge 3 10 || die "Linux 3.10 or newer required"
+
+	linux-mod_pkg_setup
+}
+
+src_unpack() {
+	if use verify-sig ; then
+		# Needed for downloaded patch (which is unsigned, which is fine)
+		verify-sig_verify_detached "${DISTDIR}"/zfs-${MY_PV}.tar.gz{,.asc}
+	fi
+
+	default
+}
+
+src_prepare() {
+	default
+
+	# Run unconditionally (bug #792627)
+	eautoreconf
+
+	if [[ ${PV} != "9999" ]]; then
+		# Set module revision number
+		sed -i "s/\(Release:\)\(.*\)1/\1\2${PR}-gentoo/" META || die "Could not set Gentoo release"
+	fi
+}
+
+src_configure() {
+	set_arch_to_kernel
+
+	use custom-cflags || strip-flags
+
+	filter-ldflags -Wl,*
+
+	# Set CROSS_COMPILE in the environment.
+	# This allows the user to override it via make.conf or via a local Makefile.
+	# https://bugs.gentoo.org/811600
+	export CROSS_COMPILE=${CROSS_COMPILE-${CHOST}-}
+
+	local myconf=(
+		HOSTCC="$(tc-getBUILD_CC)"
+		--bindir="${EPREFIX}/bin"
+		--sbindir="${EPREFIX}/sbin"
+		--with-config=kernel
+		--with-linux="${KV_DIR}"
+		--with-linux-obj="${KV_OUT_DIR}"
+		$(use_enable debug)
+	)
+
+	econf "${myconf[@]}"
+}
+
+src_compile() {
+	set_arch_to_kernel
+
+	myemakeargs=(
+		HOSTCC="$(tc-getBUILD_CC)"
+		V=1
+	)
+
+	emake "${myemakeargs[@]}"
+}
+
+src_install() {
+	set_arch_to_kernel
+
+	myemakeargs+=(
+		DEPMOD=:
+		# INSTALL_MOD_PATH ?= $(DESTDIR) in module/Makefile
+		DESTDIR="${D}"
+	)
+
+	emake "${myemakeargs[@]}" install
+
+	einstalldocs
+}
+
+pkg_postinst() {
+	linux-mod_pkg_postinst
+
+	if [[ -z ${ROOT} ]] && use dist-kernel; then
+		set_arch_to_pkgmgr
+		dist-kernel_reinstall_initramfs "${KV_DIR}" "${KV_FULL}"
+	fi
+
+	if use x86 || use arm; then
+		ewarn "32-bit kernels will likely require increasing vmalloc to"
+		ewarn "at least 256M and decreasing zfs_arc_max to some value less than that."
+	fi
+
+	if has_version sys-boot/grub; then
+		ewarn "This version of OpenZFS includes support for new feature flags"
+		ewarn "that are incompatible with previous versions. GRUB2 support for"
+		ewarn "/boot with the new feature flags is not yet available."
+		ewarn "Do *NOT* upgrade root pools to use the new feature flags."
+		ewarn "Any new pools will be created with the new feature flags by default"
+		ewarn "and will not be compatible with older versions of OpenZFS. To"
+		ewarn "create a newpool that is backward compatible wih GRUB2, use "
+		ewarn
+		ewarn "zpool create -o compatibility=grub2 ..."
+		ewarn
+		ewarn "Refer to /usr/share/zfs/compatibility.d/grub2 for list of features."
+	fi
+}