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zdev: add helper to convert from dasd_mod.dasd to zdev config

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Shell library, which can be sourced by other POSIX compatible shell
scripts. Provide helper function parsing its stdin based on the syntax of
kernel device driver parameter dasd_mod.dasd= and invoking chzdev to
produce corresponding persistent device configurations. The helper function
takes one argument, which is either "globals" or "ranges". For a complete
configuration, call the function twice, first with "globals" and then with
"ranges".

The new script library file should be packaged in a core (sub)package of
s390-tools so the script is available for initrd environments.

Users with examples:

Subsequent commit ("zdev/dracut: add rd.dasd parsing") introduces
zdev/dracut/95zdev/parse-dasd.sh performing:
zdev_parse_rd_dasd | zdev_parse_dasd_list globals 2>&1 | zdev_vinfo
zdev_parse_rd_dasd | zdev_parse_dasd_list ranges 2>&1 | zdev_vinfo

https://github.com/dracutdevs/dracut/pull/2534 updates
modules.d/80cms/cmssetup.sh performing:
echo "$DASD" | zdev_parse_dasd_list globals 2>&1 | vinfo
echo "$DASD" | zdev_parse_dasd_list ranges 2>&1 | vinfo

The parsing code for rd.dasd using the same syntax as dasd_mod.dasd=
is inspired by the own implementation that used to be in linuxrc.s390
of https://github.com/rhinstaller/anaconda.
https://web.archive.org/web/20190721154444/https://www.redhat.com/archives/anaconda-devel-list/2009-February/msg00392.html
https://www.spinics.net/linux/fedora/anaconda-devel/msg08316.html
("Re: Improved linuxrc.s390 (third try)")
=> 9249e40f42ff ("IBM improvements to linuxrc.s390 (#475350)")
https://web.archive.org/web/20190721150254/https://www.redhat.com/archives/anaconda-devel-list/2009-July/msg00310.html
=> 5f0fcf6688d0 ("Update linuxrc.s390 and friends to reflect review comments.")
https://web.archive.org/web/20190721125255/https://www.redhat.com/archives/anaconda-devel-list/2009-August/msg00158.html
=> 523095c86876 ("Handle activation of DASDs in linuxrc.s390 since loader no longer works")

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
2023-07-25 19:14:41 +02:00
committed by Jan Höppner
parent 689b894506
commit 9b2fb1d4d2
2 changed files with 89 additions and 1 deletions
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3
zdev/src/Makefile
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@@ -106,12 +106,13 @@ libs = $(rootdir)/libap/libap.a \
chzdev: $(chzdev_objects) $(libs)
lszdev: $(lszdev_objects) $(libs)
install: chzdev zdev_id zdev-to-dasd_mod.dasd
install: chzdev zdev_id zdev-to-dasd_mod.dasd zdev-from-dasd_mod.dasd
$(INSTALL) -d -m 755 $(DESTDIR)$(BINDIR)
$(INSTALL) -c chzdev $(DESTDIR)$(BINDIR)
$(INSTALL) -c lszdev $(DESTDIR)$(BINDIR)
$(INSTALL) -c zdev_id $(DESTDIR)$(TOOLS_LIBDIR)
$(INSTALL) -c zdev-to-dasd_mod.dasd $(DESTDIR)$(TOOLS_LIBDIR)
$(INSTALL) -c -m 644 zdev-from-dasd_mod.dasd $(DESTDIR)$(TOOLS_LIBDIR)
ifeq ($(HAVE_DRACUT),1)
$(INSTALL) -m 755 zdev-root-update.dracut \
$(DESTDIR)$(TOOLS_LIBDIR)/zdev-root-update