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zdev/dracut: retain early persistent config over switch root

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Useful for debugging (what happened during early boot).

Also useful for distro installers, which can import the early config into
their own environment early after starting:
chzdev --import /run/zdev.initrd.config --persistent --yes \
       --no-root-update --force --verbose

After that, distro installers can modify/add the device config based
on interactive or unattended installation choices using
chzdev --enable --active --persistent ...

Finally, distro installers can likewise transfer the entire device config
to the installed system mounted under $SYSROOT:
chzdev --export /tmp/zdev.config --all --type --persistent --verbose

Github-ID: https://github.com/ibm-s390-linux/s390-tools/pull/158
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>
This commit is contained in:
Steffen Maier
2023-05-05 19:26:49 +02:00
committed by Jan Höppner
parent b4b5e0b6aa
commit bc4f455151
3 changed files with 29 additions and 0 deletions
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2
zdev/dracut/95zdev/module-setup.sh
View File

@@ -82,6 +82,8 @@ install() {
inst_hook cmdline 94 "$moddir/parse-dasd.sh"
inst_multiple /lib/s390-tools/zdev-from-dasd_mod.dasd
inst_hook pre-pivot 95 "$moddir/retain-zdev.sh"
# Rule to automatically enable devices when running in DPM
inst_rules "81-dpm.rules"

26
zdev/dracut/95zdev/retain-zdev.sh Normal file
View File

@@ -0,0 +1,26 @@
#!/bin/sh
#
# Copyright IBM Corp. 2023
#
# s390-tools is free software; you can redistribute it and/or modify
# it under the terms of the MIT license. See LICENSE for details.
#
# 95zdev/retain-zdev.sh
# Copy zdev persistent config from initrd to root-fs.
#
chzdev --export /run/zdev.initrd.config --all --type --persistent --quiet
# Apart from debugging purposes, this is useful for distro installers,
# which can import the early config into their own environment early
# after starting:
# chzdev --import /run/zdev.initrd.config --persistent --yes --no-root-update --force --verbose
#
# After that, distro installers can modify/add the device config based
# on interactive or unattended installation choices using
# chzdev --enable --active --persistent ...
#
# Finally, distro installers can likewise transfer the entire device config
# to the installed system mounted under $SYSROOT:
# chzdev --export /tmp/zdev.config --all --type --persistent --verbose
# chzdev --import /tmp/zdev.config --persistent --yes --no-root-update --force --verbose --base "$SYSROOT"

1
zdev/dracut/Makefile
View File

@@ -23,6 +23,7 @@ install:
$(ZDEVDIR)/zdev-lib.sh \
$(ZDEVDIR)/parse-zfcp.sh \
$(ZDEVDIR)/parse-dasd.sh \
$(ZDEVDIR)/retain-zdev.sh \
$(DESTDIR)$(DRACUTMODDIR)/$(ZDEVDIR)/
$(INSTALL) -m 755 -d $(DESTDIR)$(DRACUTMODDIR)/$(ZDEVKDUMPDIR)
$(INSTALL) -m 755 $(ZDEVKDUMPDIR)/module-setup.sh \