s390utils/20-zipl-kernel.install
Javier Martinez Canillas 6f6a4deece - add a default entry in zipl.conf if there isn't one present (#1698363)
When a kernel-debug package is installed, it should only be set as default
if DEFAULTDEBUG=yes is set in /etc/sysconfig/kernel. But currently there's
no default field set in /etc/zipl.conf so the implicit order used to sort
boot entries is used.

The debug kernels contains a +debug suffix which makes them be sorted with
more precedence than non-debug kernels by the RPM sorting algorithm:

rpm --eval '%{lua: print(rpm.vercmp("4.18.0-193.el8.s390x+debug", "4.18.0-193.el8.s390x"))}'
1

So using the implicit order when a debug kernel is installed and a default
is not set leads to a wrong behavior.

The zipl kernel-install script attempts to set a default entry if has to,
but only if one is present in the zipl.conf file. Take also into account
the case when there isn't one to avoid using the implicit sorting and not
cover these corner cases like the one with the debug kernel.

Resolves: rhbz#1698363
2020-07-23 09:32:32 +02:00

186 lines
7.2 KiB
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Executable File

#!/bin/bash
if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
exit 0
fi
[[ -f /etc/sysconfig/kernel ]] && . /etc/sysconfig/kernel
COMMAND="$1"
KERNEL_VERSION="$2"
BOOT_DIR_ABS="$3"
KERNEL_IMAGE="$4"
KERNEL_DIR="${KERNEL_IMAGE%/*}"
MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID
BLS_DIR="/boot/loader/entries"
ZIPLCFG="/etc/zipl.conf"
CMDLINE_LINUX_DEBUG=" systemd.log_level=debug systemd.log_target=kmsg"
LINUX_DEBUG_VERSION_POSTFIX="_with_debugging"
LINUX_DEBUG_TITLE_POSTFIX=" with debugging"
mkbls() {
local kernelver=$1 && shift
local datetime=$1 && shift
local kernelopts=$1 && shift
local debugname=""
local flavor=""
if [[ "$kernelver" == *\+* ]] ; then
local flavor=-"${kernelver##*+}"
if [[ "${flavor}" == "-debug" ]]; then
local debugname=" with debugging"
local debugid="-debug"
fi
fi
cat <<EOF
title ${NAME} (${kernelver}) ${VERSION}${debugname}
version ${kernelver}${debugid}
linux /boot/vmlinuz-${kernelver}
initrd /boot/initramfs-${kernelver}.img
options ${kernelopts}
id ${ID}-${datetime}-${kernelver}${debugid}
grub_users \$grub_users
grub_arg --unrestricted
grub_class kernel${flavor}
EOF
}
[[ "$KERNEL_VERSION" == *\+* ]] && flavor=-"${KERNEL_VERSION##*+}"
case "$COMMAND" in
add)
if [[ "${KERNEL_DIR}" != "/boot" ]]; then
for i in \
"$KERNEL_IMAGE" \
"$KERNEL_DIR"/System.map \
"$KERNEL_DIR"/config \
"$KERNEL_DIR"/zImage.stub
do
[[ -e "$i" ]] || continue
cp -aT "$i" "/boot/${i##*/}-${KERNEL_VERSION}"
command -v restorecon &>/dev/null && \
restorecon -R "/boot/${i##*/}-${KERNEL_VERSION}"
done
# hmac is .vmlinuz-<version>.hmac so needs a special treatment
i="$KERNEL_DIR/.${KERNEL_IMAGE##*/}.hmac"
if [[ -e "$i" ]]; then
cp -a "$i" "/boot/.${KERNEL_IMAGE##*/}-${KERNEL_VERSION}.hmac"
command -v restorecon &>/dev/null && \
restorecon "/boot/.${KERNEL_IMAGE##*/}-${KERNEL_VERSION}.hmac"
fi
fi
if [[ ! -f /sbin/new-kernel-pkg || -d "${BLS_DIR}" ]]; then
declare -a BOOT_OPTIONS
if [[ -f /etc/kernel/cmdline ]]; then
read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
fi
if ! [[ ${BOOT_OPTIONS[*]} ]]; then
read -r -d '' -a line < /proc/cmdline
for i in "${line[@]}"; do
[[ "${i#initrd=*}" != "$i" || "${i#BOOT_IMAGE=*}" != "$i" ]] && continue
BOOT_OPTIONS+=("$i")
done
fi
if ! [[ ${BOOT_OPTIONS[*]} ]]; then
echo "Could not determine the kernel command line parameters." >&2
echo "Please specify the kernel command line in /etc/kernel/cmdline!" >&2
exit 1
fi
[[ -d "$BLS_DIR" ]] || mkdir -m 0700 -p "$BLS_DIR"
BLS_TARGET="${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf"
if [[ -f "${KERNEL_DIR}/bls.conf" ]]; then
cp -aT "${KERNEL_DIR}/bls.conf" "${BLS_TARGET}" || exit $?
sed -i -e "s,^linux.*,linux /boot/vmlinuz-${KERNEL_VERSION},g" "${BLS_TARGET}"
sed -i -e "s,^initrd.*,initrd /boot/initramfs-${KERNEL_VERSION}.img,g" "${BLS_TARGET}"
sed -i -e "s#^options.*#options ${BOOT_OPTIONS[*]}#g" "${BLS_TARGET}"
else
mkbls "${KERNEL_VERSION}" \
"$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${KERNEL_DIR}")")" \
"${BOOT_OPTIONS[*]}" >"${BLS_TARGET}"
fi
if [[ "$KERNEL_VERSION" == *\+* ]] && [ "x$DEFAULTDEBUG" != "xyes" ]; then
UPDATEDEFAULT="no"
fi
if [[ "x$UPDATEDEFAULT" = "xyes" ]]; then
TITLE="$(grep '^title[ \t]' "${BLS_TARGET}" | sed -e 's/^title[ \t]*//')"
NEWDEFAULT="${TITLE}"
fi
if [ "x${MAKEDEBUG}" = "xyes" ]; then
BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
cp -aT "${BLS_TARGET}" "${BLS_DEBUG}"
TITLE="$(grep '^title[ \t]' "${BLS_DEBUG}" | sed -e 's/^title[ \t]*//')"
VERSION="$(grep '^version[ \t]' "${BLS_DEBUG}" | sed -e 's/^version[ \t]*//')"
BLSID="$(grep '^id[ \t]' "${BLS_DEBUG}" | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
sed -i -e "s/^title.*/title ${TITLE}${LINUX_DEBUG_TITLE_POSTFIX}/" "${BLS_DEBUG}"
sed -i -e "s/^version.*/version ${VERSION}${LINUX_DEBUG_VERSION_POSTFIX}/" "${BLS_DEBUG}"
sed -i -e "s/^id.*/${BLSID}/" "${BLS_DEBUG}"
sed -i -e "s#^options.*#options ${BOOT_OPTIONS[*]}${CMDLINE_LINUX_DEBUG}#" "${BLS_DEBUG}"
if [ -n "$NEWDEFAULT" -a "x$DEFAULTDEBUG" = "xyes" ]; then
TITLE="$(grep '^title[ \t]' "${BLS_DEBUG}" | sed -e 's/^title[ \t]*//')"
NEWDEFAULT="${TITLE}"
fi
fi
if [ -n "$NEWDEFAULT" ] && [ -f "${ZIPLCFG}" ]; then
if grep -q "^default=" "${ZIPLCFG}"; then
sed -i -e "s,^default=.*,default=${NEWDEFAULT}," "${ZIPLCFG}"
else
echo "default=${NEWDEFAULT}" >> "${ZIPLCFG}"
fi
fi
exit 0
fi
/sbin/new-kernel-pkg --package "kernel${flavor}" --install "$KERNEL_VERSION" || exit $?
/sbin/new-kernel-pkg --package "kernel${flavor}" --mkinitrd --dracut --depmod --update "$KERNEL_VERSION" || exit $?
/sbin/new-kernel-pkg --package "kernel${flavor}" --rpmposttrans "$KERNEL_VERSION" || exit $?
# If grubby is used there's no need to run other installation plugins
exit 77
;;
remove)
if [[ ! -f /sbin/new-kernel-pkg || -d "${BLS_DIR}" ]]; then
ARCH="$(uname -m)"
BLS_TARGET="${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf"
BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
if [ -f "${BLS_TARGET}" ] && [ -f "${ZIPLCFG}" ]; then
TITLE="$(grep '^title[ \t]' "${BLS_TARGET}" | sed -e 's/^title[ \t]*//')"
sed -i -e "/^default=${TITLE}/d" "${ZIPLCFG}"
fi
if [[ -f "${BLS_DEBUG}" ]]; then
TITLE="$(grep '^title[ \t]' "${BLS_DEBUG}" | sed -e 's/^title[ \t]*//')"
sed -i -e "/^default=${TITLE}/d" "${ZIPLCFG}"
fi
rm -f "${BLS_TARGET}" "${BLS_DEBUG}"
for i in vmlinuz System.map config zImage.stub dtb; do
rm -rf "/boot/${i}-${KERNEL_VERSION}"
done
# hmac is .vmlinuz-<version>.hmac so needs a special treatment
rm -f "/boot/.vmlinuz-${KERNEL_VERSION}.hmac"
exit 0
fi
/sbin/new-kernel-pkg --package "kernel${flavor+-$flavor}" --rminitrd --rmmoddep --remove "$KERNEL_VERSION" || exit $?
# If grubby is used there's no need to run other installation plugins
exit 77
;;
*)
;;
esac