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kdump-load.sh: Attempt creating initrd before kdump load, if we don't have one

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There might be a (rare) case of missing initrd when loading a kdump.
It's rare mainly for 2 reasons:

(a) Pstore is the default log collection mechanism, kdump should only
be used as a fallback;

(b) When the package is installed, initrd is created for the
running kernel.

But imagine the user installs a new kernel with no Deck image upgrade;
this would cause the issue of a missing initrd if/when kdump is loaded.

We hereby fix it by attempting to create the initrd before kdump load,
in case it doesn't exist.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
This commit is contained in:
Guilherme G. Piccoli
2022-08-01 18:25:30 -03:00
parent 5c1cc98502
commit 2dd96e15cb
1 changed files with 21 additions and 9 deletions
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30
kdump-load.sh
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@ -46,6 +46,18 @@ grub_update() {
fi
}
# This function is responsible for creating the kdump initrd, either
# via command-line call or in case initrd doesn't exist during kdump load.
create_initrd() {
mkdir -p "${KDUMP_FOLDER}"
rm -f "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
echo "Creating the kdump initramfs for kernel \"$(uname -r)\" ..."
dracut --no-early-microcode --host-only -q -m\
"bash systemd systemd-initrd systemd-sysusers modsign dbus-daemon kdump dbus udev-rules dracut-systemd base fs-lib shutdown"\
--kver "$(uname -r)" "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
}
if [ ! -s "/usr/share/kdump/kdump.conf" ]; then
logger "kdump-steamos: /usr/share/kdump/kdump.conf is missing, aborting."
exit 0
@ -61,14 +73,7 @@ echo "${KDUMP_FOLDER}" > "${KDUMP_MNT}"
sync "${KDUMP_MNT}"
if [ "$1" = "initrd" ]; then
mkdir -p "${KDUMP_FOLDER}"
rm -f "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
echo "Creating the kdump initramfs for kernel \"$(uname -r)\" ..."
dracut --no-early-microcode --host-only -q -m\
"bash systemd systemd-initrd systemd-sysusers modsign dbus-daemon kdump dbus udev-rules dracut-systemd base fs-lib shutdown"\
--kver "$(uname -r)" "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
create_initrd
exit 0
fi
@ -115,7 +120,14 @@ KDUMP_CMDLINE=$(sed -re 's/(^| )(crashkernel|hugepages|hugepagesz)=[^ ]*//g;s/"/
KDUMP_CMDLINE="${KDUMP_CMDLINE} panic=-1 oops=panic fsck.mode=force fsck.repair=yes nr_cpus=1 reset_devices"
VMLINUX="$(grep -o 'BOOT_IMAGE=[^ ]*' /proc/cmdline)"
if ! kexec -s -p "${VMLINUX#*BOOT_IMAGE=}" --initrd "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img" --append="${KDUMP_CMDLINE}"; then
# In case we don't have a valid initrd, for some reason, try creating
# one before loading kdump (or else it will fail).
INITRD_FNAME="${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
if [ ! -s "${INITRD_FNAME}" ]; then
create_initrd
fi
if ! kexec -s -p "${VMLINUX#*BOOT_IMAGE=}" --initrd "${INITRD_FNAME}" --append="${KDUMP_CMDLINE}"; then
logger "kdump-steamos: kdump load failed"
exit 0
fi