Store cmdline in BLS snippets instead of using a grubenv variable
The kernel cmdline was stored as a kernelopts variable in the grubenv file and the BLS snippets used that. But this turned out to be fragile since the grubenv file could be removed or get corrupted easily. To prevent the entries to not have a cmdline if the grubenv can't be read, a fallback variable was set in the GRUB config file. But this still caused issues since the config needs to be re-generated to change the parameters. Instead, let's store the cmdline in the BLS snippets. This will make the configuration more robust, since it will work even without the grubenv file and the BLS entries will contain all the information needed to boot. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
This commit is contained in:
Javier Martinez Canillas
parent
107dc9a693
commit
4a742183a3
160
0214-10_linux.in-Store-cmdline-in-BLS-snippets-instead-of.patch
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160
0214-10_linux.in-Store-cmdline-in-BLS-snippets-instead-of.patch
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@ -0,0 +1,160 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Javier Martinez Canillas <javierm@redhat.com>
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Date: Wed, 13 May 2020 19:40:10 +0200
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Subject: [PATCH] 10_linux.in: Store cmdline in BLS snippets instead of using a
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variable
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The kernel cmdline was stored as a kernelopts variable in the grubenv file
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and the BLS snippets used that. But this turned out to be fragile since the
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grubenv file could be removed or get corrupted easily.
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To prevent the entries to not have a cmdline if the grubenv can't be read,
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a fallback variable was set in the GRUB config file. But this still caused
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issues since the config needs to be re-generated to change the parameters.
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Instead, let's store the cmdline in the BLS snippets. This will make the
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configuration more robust, since it will work even without the grubenv
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file and the BLS entries will contain all the information needed to boot.
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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---
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util/grub-switch-to-blscfg.in | 30 ++++++++++--------------------
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util/grub.d/10_linux.in | 41 +++++++++++++++++++++++++++++++----------
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2 files changed, 41 insertions(+), 30 deletions(-)
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diff --git a/util/grub-switch-to-blscfg.in b/util/grub-switch-to-blscfg.in
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index 3333a620c28..cb229126128 100644
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--- a/util/grub-switch-to-blscfg.in
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+++ b/util/grub-switch-to-blscfg.in
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@@ -190,7 +190,7 @@ fi
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mkbls() {
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local kernelver=$1 && shift
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local datetime=$1 && shift
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- local bootprefix=$1 && shift
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+ local kernelopts=$1 && shift
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local debugname=""
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local debugid=""
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@@ -209,10 +209,9 @@ mkbls() {
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cat <<EOF
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title ${NAME} (${kernelver}) ${VERSION}${debugname}
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version ${kernelver}${debugid}
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-linux ${bootprefix}/vmlinuz-${kernelver}
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-initrd ${bootprefix}/initramfs-${kernelver}.img
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-options \$kernelopts
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-id ${ID}-${datetime}-${kernelver}
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+linux /vmlinuz-${kernelver}
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+initrd /initramfs-${kernelver}.img
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+options ${kernelopts}
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grub_users \$grub_users
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grub_arg --unrestricted
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grub_class kernel${flavor}
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@@ -236,28 +235,19 @@ copy_bls() {
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linux_relpath="$("${grub_mkrelpath}" "${linux_path}")"
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bootprefix="${linux_relpath%%"${linux}"}"
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+ cmdline="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
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- if [ -f "${kernel_dir}/bls.conf" ] ; then
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- cp -af "${kernel_dir}/bls.conf" "${bls_target}"
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- if [ -n "${bootprefix}" ]; then
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- sed -i -e "s,^\(linux[^ \t]*[ \t]\+\).*,\1${bootprefix}${linux},g" "${bls_target}"
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- sed -i -e "/^initrd/ s,\([ \t]\+\)\([^ \t]\+\),\1${bootprefix}\2,g" "${bls_target}"
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- fi
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- else
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- mkbls "${kernelver}" \
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- "$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${kernel_dir}")")" \
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- "${bootprefix}" \
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- >"${bls_target}"
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- fi
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+ mkbls "${kernelver}" \
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+ "$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${kernel_dir}")")" \
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+ "${bootprefix}" "${cmdline}" >"${bls_target}"
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if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
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bls_debug="$(echo ${bls_target} | sed -e "s/${kernelver}/${kernelver}~debug/")"
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cp -aT "${bls_target}" "${bls_debug}"
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title="$(grep '^title[ \t]' "${bls_debug}" | sed -e 's/^title[ \t]*//')"
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- blsid="$(grep '^id[ \t]' "${bls_debug}" | sed -e "s/\.${ARCH}/-debug.${arch}/")"
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+ options="$(echo "${cmdline} ${GRUB_CMDLINE_LINUX_DEBUG}" | sed -e 's/\//\\\//g')"
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sed -i -e "s/^title.*/title ${title}${GRUB_LINUX_DEBUG_TITLE_POSTFIX}/" "${bls_debug}"
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- sed -i -e "s/^id.*/${blsid}/" "${bls_debug}"
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- sed -i -e "s/^options.*/options \$kernelopts ${GRUB_CMDLINE_LINUX_DEBUG}/" "${bls_debug}"
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+ sed -i -e "s/^options.*/options ${options}/" "${bls_debug}"
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fi
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done
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diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in
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index 09adfce80fd..80299ecaf00 100644
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--- a/util/grub.d/10_linux.in
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+++ b/util/grub.d/10_linux.in
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@@ -134,23 +134,43 @@ read_config()
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done < ${config_file}
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}
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-populate_menu()
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+blsdir="/boot/loader/entries"
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+
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+get_sorted_bls()
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{
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- blsdir="/boot/loader/entries"
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- local -a files
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local IFS=$'\n'
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- gettext_printf "Generating boot entries from BLS files...\n" >&2
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- files=($(for bls in ${blsdir}/*.conf ; do
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- if ! [[ -e "${bls}" ]] ; then
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- continue
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- fi
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+ files=($(for bls in ${blsdir}/*.conf; do
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bls="${bls%.conf}"
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bls="${bls##*/}"
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echo "${bls}"
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done | ${kernel_sort} | tac)) || :
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- for bls in "${files[@]}" ; do
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+ echo "${files[@]}"
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+}
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+
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+update_bls_cmdline()
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+{
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+ local cmdline="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
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+ local -a files=($(get_sorted_bls))
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+
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+ for bls in "${files[@]}"; do
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+ local options="${cmdline}"
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+ if [ -z "${bls##*debug*}" ]; then
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+ options="${options} ${GRUB_CMDLINE_LINUX_DEBUG}"
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+ fi
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+ options="$(echo "${options}" | sed -e 's/\//\\\//g')"
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+ sed -i -e "s/^options.*/options ${options}/" "${blsdir}/${bls}.conf"
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+ done
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+}
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+
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+populate_menu()
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+{
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+ local -a files=($(get_sorted_bls))
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+
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+ gettext_printf "Generating boot entries from BLS files...\n" >&2
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+
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+ for bls in "${files[@]}"; do
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read_config "${blsdir}/${bls}.conf"
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menu="${menu}menuentry '${title}' ${grub_arg} --id=${bls} {\n"
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@@ -224,6 +244,8 @@ if [ -z "\${kernelopts}" ]; then
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fi
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EOF
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+ update_bls_cmdline
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+
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if [ "x${BLS_POPULATE_MENU}" = "xtrue" ]; then
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populate_menu
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else
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@@ -244,7 +266,6 @@ EOF
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fi
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fi
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- ${grub_editenv} - set kernelopts="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
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if [ -n "${GRUB_EARLY_INITRD_LINUX_CUSTOM}" ]; then
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${grub_editenv} - set early_initrd="${GRUB_EARLY_INITRD_LINUX_CUSTOM}"
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fi
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@ -24,6 +24,7 @@ BLS_DIR="/boot/loader/entries"
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mkbls() {
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mkbls() {
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local kernelver=$1 && shift
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local kernelver=$1 && shift
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local datetime=$1 && shift
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local datetime=$1 && shift
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local kernelopts=$1 && shift
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local debugname=""
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local debugname=""
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local debugid=""
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local debugid=""
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@ -42,7 +43,7 @@ title ${NAME} (${kernelver}) ${VERSION}${debugname}
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version ${kernelver}${debugid}
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version ${kernelver}${debugid}
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linux /vmlinuz-${kernelver}
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linux /vmlinuz-${kernelver}
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initrd /initramfs-${kernelver}.img
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initrd /initramfs-${kernelver}.img
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options \$kernelopts
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options ${kernelopts}
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grub_users \$grub_users
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grub_users \$grub_users
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grub_arg --unrestricted
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grub_arg --unrestricted
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grub_class kernel${flavor}
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grub_class kernel${flavor}
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@ -77,19 +78,29 @@ case "$COMMAND" in
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fi
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fi
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if [[ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]] || [[ ! -f /sbin/new-kernel-pkg ]]; then
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if [[ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]] || [[ ! -f /sbin/new-kernel-pkg ]]; then
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if [[ -f /etc/kernel/cmdline ]]; then
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read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
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elif [[ -f /usr/lib/kernel/cmdline ]]; then
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read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
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else
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declare -a BOOT_OPTIONS
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read -r -d '' -a line < /proc/cmdline
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for i in "${line[@]}"; do
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[[ "${i#initrd=*}" != "$i" ]] && continue
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[[ "${i#BOOT_IMAGE=*}" != "$i" ]] && continue
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BOOT_OPTIONS+=("$i")
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done
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fi
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eval "$(grub2-get-kernel-settings)" || true
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eval "$(grub2-get-kernel-settings)" || true
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[[ -d "$BLS_DIR" ]] || mkdir -m 0700 -p "$BLS_DIR"
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[[ -d "$BLS_DIR" ]] || mkdir -m 0700 -p "$BLS_DIR"
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BLS_ID="${MACHINE_ID}-${KERNEL_VERSION}"
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BLS_ID="${MACHINE_ID}-${KERNEL_VERSION}"
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BLS_TARGET="${BLS_DIR}/${BLS_ID}.conf"
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BLS_TARGET="${BLS_DIR}/${BLS_ID}.conf"
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if [[ -f "${KERNEL_DIR}/bls.conf" ]]; then
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mkbls "${KERNEL_VERSION}" \
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cp -aT "${KERNEL_DIR}/bls.conf" "${BLS_TARGET}" || exit $?
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"$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${KERNEL_DIR}")")" \
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else
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"${BOOT_OPTIONS[*]}" >"${BLS_TARGET}"
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mkbls "${KERNEL_VERSION}" \
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command -v restorecon &>/dev/null && restorecon -R "${BLS_TARGET}"
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"$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${KERNEL_DIR}")")" \
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>"${BLS_TARGET}"
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fi
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command -v restorecon &>/dev/null && \
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restorecon -R "${BLS_TARGET}"
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LINUX="$(grep '^linux[ \t]' "${BLS_TARGET}" | sed -e 's,^linux[ \t]*,,')"
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LINUX="$(grep '^linux[ \t]' "${BLS_TARGET}" | sed -e 's,^linux[ \t]*,,')"
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INITRD="$(grep '^initrd[ \t]' "${BLS_TARGET}" | sed -e 's,^initrd[ \t]*,,')"
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INITRD="$(grep '^initrd[ \t]' "${BLS_TARGET}" | sed -e 's,^initrd[ \t]*,,')"
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@ -111,14 +122,12 @@ case "$COMMAND" in
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fi
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fi
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if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
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if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
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ARCH="$(uname -m)"
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BLS_DEBUG_ID="$(echo ${BLS_ID} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
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BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
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BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
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cp -aT "${BLS_TARGET}" "${BLS_DEBUG}"
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cp -aT "${BLS_TARGET}" "${BLS_DEBUG}"
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TITLE="$(grep '^title[ \t]' "${BLS_DEBUG}" | sed -e 's/^title[ \t]*//')"
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TITLE="$(grep '^title[ \t]' "${BLS_DEBUG}" | sed -e 's/^title[ \t]*//')"
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OPTIONS="$(echo "${BOOT_OPTIONS[*]} ${GRUB_CMDLINE_LINUX_DEBUG}" | sed -e 's/\//\\\//g')"
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sed -i -e "s/^title.*/title ${TITLE}${GRUB_LINUX_DEBUG_TITLE_POSTFIX}/" "${BLS_DEBUG}"
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sed -i -e "s/^title.*/title ${TITLE}${GRUB_LINUX_DEBUG_TITLE_POSTFIX}/" "${BLS_DEBUG}"
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sed -i -e "s/^id.*/id ${BLS_DEBUG_ID}/" "${BLS_DEBUG}"
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sed -i -e "s/^options.*/options ${OPTIONS}/" "${BLS_DEBUG}"
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sed -i -e "s/^options.*/options \$kernelopts ${GRUB_CMDLINE_LINUX_DEBUG}/" "${BLS_DEBUG}"
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if [ -n "$NEWDEFAULT" -a "x$GRUB_DEFAULT_TO_DEBUG" = "xtrue" ]; then
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if [ -n "$NEWDEFAULT" -a "x$GRUB_DEFAULT_TO_DEBUG" = "xtrue" ]; then
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NEWDEFAULT="${BLS_DEBUG_ID}"
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NEWDEFAULT="${BLS_DEBUG_ID}"
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fi
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fi
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@ -145,7 +154,6 @@ case "$COMMAND" in
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remove)
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remove)
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if [[ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]] || [[ ! -f /sbin/new-kernel-pkg ]]; then
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if [[ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]] || [[ ! -f /sbin/new-kernel-pkg ]]; then
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ARCH="$(uname -m)"
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BLS_TARGET="${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf"
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BLS_TARGET="${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf"
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BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
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BLS_DEBUG="$(echo ${BLS_TARGET} | sed -e "s/${KERNEL_VERSION}/${KERNEL_VERSION}~debug/")"
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rm -f "${BLS_TARGET}" "${BLS_DEBUG}"
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rm -f "${BLS_TARGET}" "${BLS_DEBUG}"
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@ -211,3 +211,4 @@ Patch0210: 0210-efi-Set-image-base-address-before-jumping-to-the-PE-.patch
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Patch0211: 0211-blscfg-Lookup-default_kernelopts-variable-as-fallbac.patch
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Patch0211: 0211-blscfg-Lookup-default_kernelopts-variable-as-fallbac.patch
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Patch0212: 0212-10_linux.in-fix-early-exit-due-error-when-reading-pe.patch
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Patch0212: 0212-10_linux.in-fix-early-exit-due-error-when-reading-pe.patch
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Patch0213: 0213-envblk-Fix-buffer-overrun-when-attempting-to-shrink-.patch
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Patch0213: 0213-envblk-Fix-buffer-overrun-when-attempting-to-shrink-.patch
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Patch0214: 0214-10_linux.in-Store-cmdline-in-BLS-snippets-instead-of.patch
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@ -9,7 +9,7 @@
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Name: grub2
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Name: grub2
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Epoch: 1
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Epoch: 1
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Version: 2.04
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Version: 2.04
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Release: 16%{?dist}
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Release: 17%{?dist}
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Summary: Bootloader with support for Linux, Multiboot and more
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Summary: Bootloader with support for Linux, Multiboot and more
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License: GPLv3+
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License: GPLv3+
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URL: http://www.gnu.org/software/grub/
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URL: http://www.gnu.org/software/grub/
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@ -504,6 +504,9 @@ rm -r /boot/grub2.tmp/ || :
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%endif
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%endif
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%changelog
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%changelog
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* Wed May 13 2020 Javier Martinez Canillas <javierm@redhat.com> - 2.04-17
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- Store cmdline in BLS snippets instead of using a grubenv variable
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* Tue May 12 2020 Javier Martinez Canillas <javierm@redhat.com> - 2.04-16
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* Tue May 12 2020 Javier Martinez Canillas <javierm@redhat.com> - 2.04-16
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- Fix a segfault in grub2-editenv when attempting to shrink a variable
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- Fix a segfault in grub2-editenv when attempting to shrink a variable
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|||||||
Loading…
Reference in New Issue
Block a user