#!/bin/sh
#
#  SPDX-License-Identifier: LGPL-2.1+
#
#  Copyright (c) 2021 Valve
#  Maintainer: Guilherme G. Piccoli <gpiccoli@igalia.com>
#
#  Configuration settings for kdump/pstore. After _any_ change in this
#  file, it's required to re-create the kdump minimal initramfs by running:
#  /usr/lib/kdump/kdump-load.sh initrd
#
#
#  Pstore-RAM settings
#  If USE_PSTORE_RAM is set to 1, Kdump won't be loaded. Instead, the Pstore
#  RAM backend will be configured. In order to have success, this operation
#  relies in having an available RAM buffer on /proc/iomem with at least
#  PSTORE_MEM_AMOUNT (decimal, in MB) in size. Also, kernel must be able to
#  allocate a contiguous memory amount of PSTORE_RECORD_SZ (decimal, MB).
USE_PSTORE_RAM=1
PSTORE_MEM_AMOUNT=5242880
PSTORE_RECORD_SZ=2097152
#
#
#  Mount-related options
#  MOUNT_DEVNODE is the desired mount-point unique link in the /dev/disk
#  directory link; this is used to derive the numerical devnode for kdump,
#  since the link is not present so early in the system boot. MOUNT_FOLDER
#  should live in the filesystem of the devnode  (and will be created if
#  doesn't exist); this is the place in which both pstore and kdump logs
#  will be stored, as well as the kdump initrd and some ancillary data.
#  Finally, MNT_TMP is just a temporary file that carries the full path
#  of the mounted folder across boot-time scripts.
MOUNT_DEVNODE="/dev/disk/by-partsets/shared/home"
MOUNT_FOLDER="/.steamos/offload/var/kdump"
MNT_TMP="/tmp/.kdump_load.mnt"
#
#
#  Kdump controlling settings
#  Currently we only do local storage log collection (no network/iscsi dumps).
#  If FULL_COREDUMP is !=0, we collect a full compressed vmcore, which might
#  require a lot of disk space. The MAKEDUMPFILE_*_CMD settings refer to
#  tunings on makedumpfile - we rely on zstd compression and maximum page
#  exclusion for the full vmcore, mimic'ing Debian kdump
FULL_COREDUMP=0
MAKEDUMPFILE_COREDUMP_CMD="-z -d 31"
MAKEDUMPFILE_DMESG_CMD="--dump-dmesg"
#
#
#  GRUB-related settings
#  GRUB_AUTOSET determines if the pstore/kdump tooling should try to
#  automatically set grub.cfg in order to reserve memory for kdump (if
#  needed, i.e., when pstore is not in use) - keep it as '1' for enabling
#  the mechanism (this is the default). GRUB_BOOT_FILE is the full path of
#  grub.cfg file - this is used in the config update step plus for syncing
#  purposes. GRUB_CFG_FILE is the config file we edit in order to add/remove
#  the crashkernel parameter. Finally, GRUB_CMDLINE holds the change to be
#  made in the grub config file, specially the crashkernel memory reservation
#  (notice that a trailing space is required in this line, so we avoid
#  messing with other kernel parameters).
GRUB_AUTOSET=1
GRUB_BOOT_FILE="/efi/EFI/steamos/grub.cfg"
GRUB_CFG_FILE="/etc/default/grub"
GRUB_CMDLINE="crashkernel=256M crash_kexec_post_notifiers "