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https://github.com/ibm-s390-linux/s390-tools.git
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5aac5deb75
Add a short explaining comment to those functions, which are just callbacks invoked by the dracut core infrastructure. So nobody wonders how these functions get called, especially if there are no local callers here in the code. Cf. dracut commit https://github.com/dracutdevs/dracut/commit/8bcfd683bd0c ("*/module-setup.sh: add comments for dracut called functions") For more information about the dracut module callback functions: https://github.com/dracutdevs/dracut/blob/master/man/dracut.modules.7.asc#writing-a-module https://github.com/dracutdevs/dracut/blob/master/docs/HACKING.md#writing-modules Github-ID: https://github.com/ibm-s390-linux/s390-tools/pull/158 Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@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>
101 lines
2.9 KiB
Bash
101 lines
2.9 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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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 "$moddir/parse-zdev.sh"
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# Rule to automatically enable devices when running in DPM
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inst_rules "81-dpm.rules"
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# Obtain early + root device configuration
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_tempfile=$(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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