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https://github.com/ibm-s390-linux/s390-tools.git
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f2c82bf2b5
With the introduction of zdev for device configuration in v1.33.0, it used a hardcoded "/" to refer to the root-fs. Dracut has its own mechanism to find the root file system and to walk its device dependencies. Mkdumprd also has its own mechanism to interpret the kdump target and invokes dracut so that dracut only considers arguments from mkdumprd without any root-fs dracut would default to [--no-hostonly-default-device]. Use the dracut mechanism to walk device dependencies and individually have chzdev treat each leaf-node in the dependency tree. See also https://github.com/dracutdevs/dracut commit 83e0dc7a3dca ("Add for_each_host_dev_and_slaves for device only checking"). This enables the use of dracut options such as --add-device or --mount used in turn by mkdumprd. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
89 lines
2.7 KiB
Bash
89 lines
2.7 KiB
Bash
#!/bin/bash
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#
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# Copyright IBM Corp. 2016, 2017
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#
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# s390-tools is free software; you can redistribute it and/or modify
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# it under the terms of the MIT license. See LICENSE for details.
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#
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#
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# 95zdev/module_setup.sh
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# This module installs configuration files (udev rules and modprobe.conf
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# files) required to enable the root device on s390. It will only work when
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# the root device was configured using the chzdev tool. In addition,
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# a hook is installed to parse rd.zdev= kernel parameters.
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#
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check() {
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local _arch=$(uname -m)
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# Ensure that we're running on s390
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[ "$_arch" = "s390" -o "$_arch" = "s390x" ] || return 1
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# Ensure that required tools are available
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require_binaries chzdev lszdev /lib/s390-tools/zdev_id || return 1
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return 0
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}
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depends() {
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return 0
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}
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installkernel() {
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# Add modules for all device types supported by chzdev (required for
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# auto-configuration)
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instmods ctcm lcs qeth qeth_l2 qeth_l3 dasd_mod dasd_eckd_mod dasd_fba_mod \
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dasd_diag_mod zfcp
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}
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install() {
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local _tempfile
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# Ensure that required tools are available
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inst_multiple chzdev lszdev vmcp /lib/s390-tools/zdev_id
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# Hook to parse zdev kernel parameter
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inst_hook cmdline 95 "$moddir/parse-zdev.sh"
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# Rule to automatically enable devices when running in DPM
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inst_rules "81-dpm.rules"
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# Obtain early + root device configuration
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_tempfile=$(mktemp --tmpdir dracut-zdev.XXXXXX)
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function check_zdev() {
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local _dev=$1
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local _devsysfs _bdevpath
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_devsysfs=$(
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cd -P /sys/dev/block/"$_dev" && echo "$PWD"
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)
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_bdevpath=/dev/${_devsysfs##*/}
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chzdev --export - --persistent --by-node "$_bdevpath" --quiet \
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--type 2>/dev/null >> "$_tempfile"
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}
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for_each_host_dev_and_slaves_all check_zdev
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chzdev --export - --persistent --by-attrib "zdev:early=1" --quiet \
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--type 2>/dev/null >> "$_tempfile"
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# Obtain early device configuration for site-specific settings
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for (( site=0; site<10; site++ ))
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do
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chzdev --export - --persistent --by-attrib "zdev:early=1" --site $site \
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--quiet 2>/dev/null >> "$_tempfile"
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done
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# Apply via --import to prevent other devices from being configured
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chzdev --import "$_tempfile" --persistent --base "/etc=$initdir/etc" \
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--yes --quiet --no-root-update --force >/dev/null
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# Apply site-specific configurations via --import
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for (( site=0; site<10; site++ ))
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do
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chzdev --import "$_tempfile" --persistent --base "/etc=$initdir/etc" \
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--site $site --yes --quiet --no-root-update --force >/dev/null
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done
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rm -f "$_tempfile"
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return 0
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}
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