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Merge pull request #12 from enix/zfs-20240605
feat(zfs): add 3815.2.3 support
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‎files/zfs/3815.2.3/overlay/eclass/dist-kernel-utils.eclass‎

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# Copyright 2020-2023 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: dist-kernel-utils.eclass
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# @MAINTAINER:
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# Distribution Kernel Project <[email protected]>
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# @AUTHOR:
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# Michał Górny <[email protected]>
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# @SUPPORTED_EAPIS: 7 8
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# @BLURB: Utility functions related to Distribution Kernels
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# @DESCRIPTION:
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# This eclass provides various utility functions related to Distribution
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# Kernels.
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# @ECLASS_VARIABLE: KERNEL_IUSE_SECUREBOOT
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# @PRE_INHERIT
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# If set to a non-null value, inherits secureboot.eclass
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# and allows signing of generated kernel images.
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if [[ ! ${_DIST_KERNEL_UTILS} ]]; then
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case ${EAPI} in
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7|8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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if [[ ${KERNEL_IUSE_SECUREBOOT} ]]; then
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inherit secureboot
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fi
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# @FUNCTION: dist-kernel_build_initramfs
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# @USAGE: <output> <version>
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# @DESCRIPTION:
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# Build an initramfs for the kernel. <output> specifies the absolute
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# path where initramfs will be created, while <version> specifies
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# the kernel version, used to find modules.
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#
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# Note: while this function uses dracut at the moment, other initramfs
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# variants may be supported in the future.
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dist-kernel_build_initramfs() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -eq 2 ]] || die "${FUNCNAME}: invalid arguments"
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local output=${1}
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local version=${2}
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local rel_image_path=$(dist-kernel_get_image_path)
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local image=${output%/*}/${rel_image_path##*/}
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local args=(
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--force
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# if uefi=yes is used, dracut needs to locate the kernel image
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--kernel-image "${image}"
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# positional arguments
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"${output}" "${version}"
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)
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ebegin "Building initramfs via dracut"
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dracut "${args[@]}"
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eend ${?} || die -n "Building initramfs failed"
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}
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# @FUNCTION: dist-kernel_get_image_path
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# @DESCRIPTION:
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# Get relative kernel image path specific to the current ${ARCH}.
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dist-kernel_get_image_path() {
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case ${ARCH} in
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amd64|x86)
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echo arch/x86/boot/bzImage
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;;
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arm64)
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echo arch/arm64/boot/Image.gz
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;;
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arm)
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echo arch/arm/boot/zImage
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;;
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hppa|ppc|ppc64|sparc)
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# https://www.kernel.org/doc/html/latest/powerpc/bootwrapper.html
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# ./ is required because of ${image_path%/*}
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# substitutions in the code
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echo ./vmlinux
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;;
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riscv)
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echo arch/riscv/boot/Image.gz
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;;
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*)
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die "${FUNCNAME}: unsupported ARCH=${ARCH}"
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;;
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esac
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}
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# @FUNCTION: dist-kernel_install_kernel
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# @USAGE: <version> <image> <system.map>
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# @DESCRIPTION:
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# Install kernel using installkernel tool. <version> specifies
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# the kernel version, <image> full path to the image, <system.map>
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# full path to System.map.
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dist-kernel_install_kernel() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -eq 3 ]] || die "${FUNCNAME}: invalid arguments"
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local version=${1}
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local image=${2}
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local map=${3}
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# if dracut is used in uefi=yes mode, initrd will actually
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# be a combined kernel+initramfs UEFI executable. we can easily
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# recognize it by PE magic (vs cpio for a regular initramfs)
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local initrd=${image%/*}/initrd
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local magic
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[[ -s ${initrd} ]] && read -n 2 magic < "${initrd}"
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if [[ ${magic} == MZ ]]; then
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einfo "Combined UEFI kernel+initramfs executable found"
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# install the combined executable in place of kernel
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image=${initrd%/*}/uki.efi
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mv "${initrd}" "${image}" || die
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# We moved the generated initrd, prevent dracut from running again
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# https://github.com/dracutdevs/dracut/pull/2405
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shopt -s nullglob
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local plugins=()
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for file in "${EROOT}"/etc/kernel/install.d/*.install; do
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plugins+=( "${file}" )
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done
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for file in "${EROOT}"/usr/lib/kernel/install.d/*.install; do
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if ! has "${file##*/}" 50-dracut.install 51-dracut-rescue.install "${plugins[@]##*/}"; then
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plugins+=( "${file}" )
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fi
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done
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shopt -u nullglob
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export KERNEL_INSTALL_PLUGINS="${KERNEL_INSTALL_PLUGINS} ${plugins[@]}"
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fi
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if [[ ${KERNEL_IUSE_SECUREBOOT} ]]; then
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# Kernel-install requires uki's are named uki.efi, sign in-place
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secureboot_sign_efi_file "${image}" "${image}"
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fi
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ebegin "Installing the kernel via installkernel"
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# note: .config is taken relatively to System.map;
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# initrd relatively to bzImage
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installkernel "${version}" "${image}" "${map}"
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eend ${?} || die -n "Installing the kernel failed"
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}
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# @FUNCTION: dist-kernel_reinstall_initramfs
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# @USAGE: <kv-dir> <kv-full>
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# @DESCRIPTION:
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# Rebuild and install initramfs for the specified dist-kernel.
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# <kv-dir> is the kernel source directory (${KV_DIR} from linux-info),
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# while <kv-full> is the full kernel version (${KV_FULL}).
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# The function will determine whether <kernel-dir> is actually
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# a dist-kernel, and whether initramfs was used.
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#
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# This function is to be used in pkg_postinst() of ebuilds installing
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# kernel modules that are included in the initramfs.
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dist-kernel_reinstall_initramfs() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -eq 2 ]] || die "${FUNCNAME}: invalid arguments"
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local kernel_dir=${1}
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local ver=${2}
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local image_path=${kernel_dir}/$(dist-kernel_get_image_path)
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local initramfs_path=${image_path%/*}/initrd
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if [[ ! -f ${image_path} ]]; then
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eerror "Kernel install missing, image not found:"
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eerror " ${image_path}"
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eerror "Initramfs will not be updated. Please reinstall your kernel."
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return
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fi
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if [[ ! -f ${initramfs_path} && ! -f ${initramfs_path%/*}/uki.efi ]]; then
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einfo "No initramfs or uki found at ${image_path}"
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return
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fi
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dist-kernel_build_initramfs "${initramfs_path}" "${ver}"
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dist-kernel_install_kernel "${ver}" "${image_path}" \
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"${kernel_dir}/System.map"
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}
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# @FUNCTION: dist-kernel_PV_to_KV
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# @USAGE: <pv>
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# @DESCRIPTION:
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# Convert a Gentoo-style ebuild version to kernel "x.y.z[-rcN]" version.
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dist-kernel_PV_to_KV() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -ne 1 ]] && die "${FUNCNAME}: invalid arguments"
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local pv=${1}
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local kv=${pv%%_*}
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[[ -z $(ver_cut 3- "${kv}") ]] && kv+=".0"
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[[ ${pv} == *_* ]] && kv+=-${pv#*_}
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echo "${kv}"
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}
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_DIST_KERNEL_UTILS=1
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fi

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