48 lines
1.6 KiB
Bash
Executable File
48 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: LGPL-2.1+
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#
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# Copyright (c) 2021 Valve.
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#
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# Script that loads the panic kdump (from within a systemd service)
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# or if the proper parameters are passed, either creates the minimal
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# kdump initramfs for the running kernel or removes all the previously created.
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# ones. Since it runs on boot time, avoid failing here to not risk a boot hang.
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#
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if [ ! -f "/etc/default/kdump" ]; then
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exit 0
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fi
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. /etc/default/kdump
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# Fragile way for finding the proper mount point for DEVNODE:
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DEVN_MOUNTED=$(mount |grep "${MOUNT_DEVNODE}" | head -n1 | cut -f3 -d\ )
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KDUMP_FOLDER="${DEVN_MOUNTED}/${KDUMP_FOLDER}"
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if [ "$1" == "initrd" ]; then
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mkdir -p "${KDUMP_FOLDER}"
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rm -f "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
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echo "Creating the kdump initramfs for kernel \"$(uname -r)\" ..."
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dracut --no-early-microcode --host-only -q -m\
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"bash systemd systemd-initrd systemd-sysusers modsign dbus-daemon kdump dbus udev-rules dracut-systemd base fs-lib shutdown"\
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--kver $(uname -r) "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img"
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exit 0
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fi
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if [ "$1" == "clear" ]; then
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rm -f ${KDUMP_FOLDER}/kdump-initrd-*
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exit 0
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fi
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# Stolen from Debian kdump
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KDUMP_CMDLINE=$(sed -re 's/(^| )(crashkernel|hugepages|hugepagesz)=[^ ]*//g;s/"/\\\\"/' /proc/cmdline)
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KDUMP_CMDLINE="${KDUMP_CMDLINE} panic=-1 oops=panic fsck.mode=force fsck.repair=yes nr_cpus=1 reset_devices"
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VMLINUX="$(grep -o 'BOOT_IMAGE=[^ ]*' /proc/cmdline)"
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kexec -s -p "${VMLINUX#*BOOT_IMAGE=}" --initrd "${KDUMP_FOLDER}/kdump-initrd-$(uname -r).img" --append="${KDUMP_CMDLINE}" || true
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exit 0
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