util: Enable default kernel for updates

Resolves: #2184069
Signed-off-by: Marta Lewandowska <mlewando@redhat.com>
Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>

0323-util-Enable-default-kernel-for-updates.patch

@@ -0,0 +1,34 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nicolas Frayer <nfrayer@redhat.com>
+Date: Wed, 24 May 2023 11:22:47 +0200
+Subject: [PATCH] util: Enable default kernel for updates
+
+Several kernel variants can be installed on a system in parallel.
+In order to allow the user to choose which kernel will be set to
+default after an update, re-enable grub's usage of DEFAULTKERNEL as
+set in /etc/sysconfig/kernel
+
+Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>
+---
+ util/grub-get-kernel-settings.in | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/util/grub-get-kernel-settings.in b/util/grub-get-kernel-settings.in
+index 7e87dfccc0..f71bc64360 100644
+--- a/util/grub-get-kernel-settings.in
++++ b/util/grub-get-kernel-settings.in
+@@ -68,6 +68,14 @@ if test -f /etc/sysconfig/kernel ; then
+     . /etc/sysconfig/kernel
+ fi
+ 
++GRUB_DEFAULT_KERNEL_TYPE=${DEFAULTKERNEL/-core/}
++if [ "$GRUB_DEFAULT_KERNEL_TYPE" != "kernel" ]; then
++    echo GRUB_NON_STANDARD_KERNEL=true
++    echo export GRUB_NON_STANDARD_KERNEL
++    GRUB_DEFAULT_KERNEL_TYPE=${GRUB_DEFAULT_KERNEL_TYPE/kernel-/}
++fi
++echo GRUB_DEFAULT_KERNEL_TYPE=$GRUB_DEFAULT_KERNEL_TYPE
++echo export GRUB_DEFAULT_KERNEL_TYPE
+ if [ "$MAKEDEBUG" = "yes" ]; then
+     echo GRUB_LINUX_MAKE_DEBUG=true
+     echo export GRUB_LINUX_MAKE_DEBUG

20-grub.install

@@ -126,7 +126,11 @@ case "$COMMAND" in
                 sed -i -e "s,^initrd.*,initrd ${BOOTPREFIX}${INITRD},g" "${BLS_TARGET}"
             fi
 
-            if [[ "$KERNEL_VERSION" == *\+debug* ]] && [ "x$GRUB_DEFAULT_TO_DEBUG" != "xtrue" ]; then
+            if ( [[ "$KERNEL_VERSION" != *${GRUB_DEFAULT_KERNEL_TYPE}* ]] && \
+                     [ "x$GRUB_NON_STANDARD_KERNEL" == "xtrue" ] ) || \
+                   ( echo "$KERNEL_VERSION" | grep -E -q "64k|auto|rt|uki" && \
+                     [ "x$GRUB_NON_STANDARD_KERNEL" != "xtrue" ] ) || \
+                   ( [[ "$KERNEL_VERSION" == *debug* ]] && [ "x$GRUB_DEFAULT_TO_DEBUG" != "xtrue" ] ); then
                 GRUB_UPDATE_DEFAULT_KERNEL=false
             fi
 

grub.patches

@@ -320,3 +320,4 @@ Patch0319: 0319-osdep-linux-hostdisk-Modify-sector-by-sysfs-as-disk-.patch
 Patch0320: 0320-mm-Adjust-new-region-size-to-take-management-overhea.patch
 Patch0321: 0321-mm-Preallocate-some-space-when-adding-new-regions.patch
 Patch0322: 0322-mm-Avoid-complex-heap-growth-math-in-hot-path.patch
+Patch0323: 0323-util-Enable-default-kernel-for-updates.patch

grub2.spec

@@ -16,7 +16,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.06
-Release:	62%{?dist}
+Release:	63%{?dist}
 Summary:	Bootloader with support for Linux, Multiboot and more
 License:	GPLv3+
 URL:		http://www.gnu.org/software/grub/
@@ -533,6 +533,10 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
 %endif
 
 %changelog
+* Wed May 24 2023 Nicolas Frayer <nfrayer@redhat.com> - 2.06-63
+- util: Enable default kernel for updates
+- Resolves: #2184069
+
 * Tue May 23 2023 Javier Martinez Canillas <javierm@redhat.com> - 2.06-62
 - 20-grub-install: Explicitly check '+debug' suffix for debug kernels
 - Resolves: #2148351