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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>
57 lines
1.5 KiB
Bash
57 lines
1.5 KiB
Bash
#!/bin/sh
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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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# hooks/zdev
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# This hook script adds files required to apply firmware-provided I/O
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# configuration data during boot.
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#
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# Needs to run after udev or resulting udev rules could be overwritten
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PREREQ="udev"
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prereqs()
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{
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echo "$PREREQ"
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}
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case $1 in
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prereqs)
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prereqs
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exit 0
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;;
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esac
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. /usr/share/initramfs-tools/hook-functions
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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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zdev_modules="lcs qeth qeth_l2 qeth_l3 dasd_mod dasd_eckd_mod dasd_fba_mod dasd_diag_mod zfcp"
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for x in $zdev_modules ; do
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manual_add_modules ${x}
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done
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copy_exec /sbin/chzdev
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copy_exec /sbin/lszdev
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copy_exec /sbin/vmcp
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_tempfile=$(mktemp --tmpdir initramfs-zdev.XXXXXX)
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# Obtain early + root device configuration
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chzdev --export "$_tempfile" --persistent --by-path / \
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--by-attrib "zdev:early=1" --quiet --type 2>/dev/null
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# Apply via --import to prevent other devices from being configured.
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# Rename the resulting cio-ignore rule to ensure that it does not override
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# the one copied by the initramfs udev hook to /lib/udev.
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chzdev --import "$_tempfile" --persistent \
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--base "/etc/udev/rules.d/41-cio-ignore.rules=$DESTDIR/etc/udev/rules.d/41-cio-ignore-root.rules" \
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--base "/etc=$DESTDIR/etc" --yes --quiet --no-root-update --force \
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>/dev/null
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rm -f "$_tempfile"
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