QubesOS/qubes-linux-utils
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udev: create /dev/mapper/dmroot -> xvda3 symlink when its mounted directly

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When root device is available read-write (TemplateVM/StandaloneVM), its
mounted directly, instead of using device-mapper layer. But
/dev/mapper/dmroot still needs to exists (it is pointed from
/etc/fstab), otherwise various tools, including grub-mkconfig get
confused.
Create a symlink using udev rule. It is already done in initramfs, and
in case of Fedora that udev rule/symlink survive switching to
non-initramfs udev, but not on Debian. So, add appropriate udev rules
file.

Fixes QubesOS/qubes-issues#3178
This commit is contained in:
Marek Marczykowski-Górecki 2018-06-13 15:48:00 +02:00
parent 915c8f0cf7
commit f7b8a79ce6
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GPG Key ID: 063938BA42CFA724
3 changed files with 7 additions and 1 deletions
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2
rpm_spec/qubes-utils.spec.in
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@ -118,7 +118,7 @@ rm -rf $RPM_BUILD_ROOT
%files
%defattr(-,root,root,-)
/lib/udev/rules.d/99-qubes-*.rules
/lib/udev/rules.d/*-qubes-*.rules
/usr/lib/qubes/udev-*
%{_sbindir}/meminfo-writer
%{_unitdir}/qubes-meminfo-writer.service

1
udev/Makefile
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@ -5,6 +5,7 @@ install:
cp udev-qubes-block.rules $(DESTDIR)$(SYSLIBDIR)/udev/rules.d/99-qubes-block.rules
cp udev-qubes-usb.rules $(DESTDIR)$(SYSLIBDIR)/udev/rules.d/99-qubes-usb.rules
cp udev-qubes-misc.rules $(DESTDIR)$(SYSLIBDIR)/udev/rules.d/99-qubes-misc.rules
cp udev-qubes-dmroot.rules $(DESTDIR)$(SYSLIBDIR)/udev/rules.d/90-qubes-dmroot.rules
mkdir -p $(DESTDIR)$(SCRIPTSDIR)
cp udev-block-add-change $(DESTDIR)$(SCRIPTSDIR)

5
udev/udev-qubes-dmroot.rules Normal file
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@ -0,0 +1,5 @@
# Create /dev/mapper/dmroot symlink on TemplateVM/StandaloneVM to make
# grub-mkconfig happy.
# On TemplateBasedVM, it is really a device mapper device.
SUBSYSTEM=="block", ENV{ID_PART_ENTRY_NAME}=="Root\x20filesystem", ATTR{ro}=="0", SYMLINK+="mapper/dmroot"