a3ab8c421b
This is somewhat a big refactor. The early design of kdump/pstore was meant to support the A/B scheme of Steam Deck and a dracut-based initrd only. In this scheme, we had a DEVNODE (like nvme partition or a devlink) that represented the device node to be mounted early in boot when kdump was in use. Also, we had a folder defined in the config file on top of such dev node, and a temporary file used to "carry" the composition of the full kdump path across boot time scripts. Yeah, kinda complex setup. We are now moving to a more generic approach, and for that, the design choice was a more convenient/simple one for the common cases, that requires some operations to properly work on SteamOS dracut-based initrd. Now we have only a single path on config file, which should be accessible in a R/W filesystem by both scripts executed in the systemd service. No devnode information or temp file is used anymore. But with that, comes the need of discovering the proper devnode and base folder for kdump'ing early in boot, from the initrd. Using the findmnt tool we manage to derive all the necessary data during the initrd preparation phase. Also, while at it we manage to fix an "inconsistency" of our dracut initrd creation script: installkernel() should be responsible to deal with DRM modules removal, not install(). On top of this (already big) change, now our dracut initrd excludes not only amdgpu driver/FWs, but radeon, nvidia and i915 as well. And due to our refactor of the mount point information (using findmnt to collect info during dracut initrd creation), we also allow now arbitrary filesystem drivers to be included, i.e., we don't hardcode/limit for ext4 only. Again, mea culpa for not splitting this in multiple atomic/simple commits, the burden to keep a pretty git log is starting to consume precious time. Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
58 lines
1.7 KiB
Bash
58 lines
1.7 KiB
Bash
#!/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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# Maintainer: Guilherme G. Piccoli <gpiccoli@igalia.com>
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#
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# Script for effectively collecting the core dump/dmesg from
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# within a minimal initrd - part of kdump/pstore tooling.
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# The most fail-prone operations are guarded with conditionals to
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# bail in case we indeed fail - worst thing here would be to have
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# a bad condition and get stuck in this minimal initrd with no
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# output for the user.
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#
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# Bail out in case we don't have a vmcore, i.e. either we're not kdumping
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# or something is pretty wrong and we wouldn't be able to progress.
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VMCORE="/proc/vmcore"
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if [ ! -f $VMCORE ]; then
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reboot -f
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fi
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# We have a more controlled situation with regards the config
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# files here, since we manually added them in the initrd and
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# the validation also happened there, during such addition,
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# hence not requiring checks here.
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for cfg in "/usr/share/kdump.d"/*; do
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. "$cfg"
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done
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KDUMP_TIMESTAMP=$(date -u +"%Y%m%d%H%M")
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MOUNT_POINT="$(cat /usr/lib/kdump/kdump.mnt)"
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BASE_FOLDER="$(cat /usr/lib/kdump/kdump.dir)"
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KDUMP_FOLDER="/kdump_path/${BASE_FOLDER}/crash/${KDUMP_TIMESTAMP}"
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mkdir -p "/kdump_path"
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if ! mount "${MOUNT_POINT}" /kdump_path; then
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reboot -f
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fi
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mkdir -p "${KDUMP_FOLDER}"
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# we want to split on spaces, it's a set of parameters!
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# shellcheck disable=SC2086
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/usr/bin/makedumpfile ${MAKEDUMPFILE_DMESG_CMD} $VMCORE "${KDUMP_FOLDER}/dmesg.txt"
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sync "${KDUMP_FOLDER}/dmesg.txt"
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if [ "${FULL_COREDUMP}" -ne 0 ]; then
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# shellcheck disable=SC2086
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/usr/bin/makedumpfile ${MAKEDUMPFILE_COREDUMP_CMD} $VMCORE "${KDUMP_FOLDER}/vmcore.compressed"
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sync "${KDUMP_FOLDER}/vmcore.compressed"
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fi
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umount "${MOUNT_POINT}"
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sync
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reboot -f
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