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63f31bf73e
Additional debugging output can be generated with e.g. dracut option "--stdlog 5" (or short -L5). It shows the chzdev export result, the output of chzdev imports, and an overview of the resulting persistent config within the initrd. On systems, which default to using dracut option "--quiet", you might need an additional "--verbose" to counter "--quiet" so -L5 has effect. Typically combined with "--debug" to get a shell trace from building an initrd (Note: --debug does not increase the log levels). Github-ID: https://github.com/ibm-s390-linux/s390-tools/pull/158 Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com> Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com> Acked-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>
112 lines
3.2 KiB
Bash
112 lines
3.2 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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# called by dracut
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check() {
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local _arch
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_arch=$(uname -m)
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# Ensure that we're running on s390
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[ "$_arch" = "s390" ] || [ "$_arch" = "s390x" ] || return 1
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# shellcheck source=/dev/null
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source "${moddir:?}/zdev-lib.sh"
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# Leave kdump device configuration to module zdev-kdump to
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# ensure a minimal device footprint
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zdev_is_kdump && 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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# called by dracut
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depends() {
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return 0
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}
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# called by dracut
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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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hostonly="$(optional_hostonly)" \
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instmods ctcm lcs qeth qeth_l2 qeth_l3 dasd_mod dasd_eckd_mod dasd_fba_mod \
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dasd_diag_mod zfcp
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}
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# called by dracut
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install() {
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local _tempfile
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# Ensure that required tools are available
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inst_multiple chzdev lszdev vmcp /lib/s390-tools/zdev_id
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# Hook to parse zdev kernel parameter
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inst_hook cmdline 95 "$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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# If enabled, add the host-specific config of required devices into initrd
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# shellcheck disable=SC2154
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[[ $hostonly ]] || return 0
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_tempfile=$(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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ddebug < "$_tempfile"
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# Apply via --import to prevent other devices from being configured
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chzdev --import "$_tempfile" --persistent --base "/etc=${initdir:?}/etc" \
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--yes --no-root-update --force 2>&1 | ddebug
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# Apply site-specific configurations via --import
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for (( site=0; site<10; site++ ))
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do
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chzdev --import "$_tempfile" --persistent --base "/etc=$initdir/etc" \
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--site $site --yes --no-root-update --force 2>&1 | ddebug
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done
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lszdev --configured --persistent --info \
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--base "/etc=$initdir/etc" 2>&1 | ddebug
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rm -f "$_tempfile"
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return 0
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}
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