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https://github.com/ibm-s390-linux/s390-tools.git
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156450f359
Enable user to specify that a device should be configured early, that is during the initial RAM-disk boot phase. This may be necessary, e.g. to override auto-configuration for a device which is also applied during that boot phase. It may also be used to manually specify devices that are required to access the root file system, such as networking devices. Users can mark devices as requiring early configuration by specifying a value of 1 for the newly added internal attribute zdev:early: # chzdev dasd-eckd 0.0.1234 -p zdev:early=1 This can be changed back by removing the attribute setting, or by setting the attribute value to 0: # chzdev dasd-eckd 0.0.1234 -p -r zdev:early or # chzdev dasd-eckd 0.0.1234 -p zdev:early=0 Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
63 lines
1.7 KiB
Bash
63 lines
1.7 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 "$_arch" = "s390x" ] || return 1
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# Ensure that required tools are available
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require_binaries chzdev lszdev || return 1
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return 0
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}
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depends() {
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return 0
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}
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installkernel() {
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# Add modules for all device types supported by chzdev (required for
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# auto-configuration)
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instmods lcs qeth qeth_l2 qeth_l3 dasd_mod dasd_eckd_mod dasd_fba_mod \
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dasd_diag_mod zfcp
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}
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install() {
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local _tempfile
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# Ensure that required tools are available
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inst_multiple chzdev lszdev vmcp
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# Hook to parse zdev kernel parameter
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inst_hook cmdline 95 "$moddir/parse-zdev.sh"
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# Obtain early + root device configuration
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_tempfile=$(mktemp --tmpdir dracut-zdev.XXXXXX)
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chzdev --export "$_tempfile" --persistent --by-path / --quiet \
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--type 2>/dev/null
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chzdev --export - --persistent --by-attrib "zdev:early=1" --quiet \
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--type 2>/dev/null >> "$_tempfile"
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# Apply via --import to prevent other devices from being configured
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chzdev --import "$_tempfile" --persistent --base "/etc=$initdir/etc" \
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--yes --quiet --no-root-update --force >/dev/null
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rm -f "$_tempfile"
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return 0
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}
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