Do not add 1:1 dm-linear when root.img (/dev/xvda) is read-write. This
was to always have root device at /dev/mapper/dmroot, but unfortunately
grub can't parse it properly (fails at looking for partition number of
/dev/xvda1). There was a hack specifically for this, but it caused other
partitions on xvda unavailable.
On the other hand, symlink is enough to be able to mount always the same
device. Now, grub detect that root fs is on /dev/xvda1, which is
enough to have grub2-install working. Unfortunate effect is that it puts
root=/dev/xvda1 at kernel command line, which breaks AppVMs based on
this TemplateVM. But it's easier to fix kernel command line, than grub
device detection logic.
Fixes "initramfs: add support for root.img with partition table"
QubesOS/qubes-issues#2557
Debian use /usr/lib/python*/dist-packages (instead of site-packages) for
packaged python modules. It's achieved using --install-layout=deb
option, so pass it on Debian build.
Installing grub on root.img require some space before the filesystem.
Create it by adding partition table to root.img. This commit take care
of assembling dmroot device when such partition table is present, while
preserving compatibility with partition-less images.
QubesOS/qubes-issues#2577
This hook require new device nodes to appear in /dev. If devtmpfs is
used, it's not a problem ("simple" initramfs case), but otherwise udevd
is needed - and it isn't running in pre-udev hook yet.
QubesOS/qubes-issues#2577
Send just one value - used memory (which is calculated anyway),
instead of full input data. This greatly simplify parsing at qmemman
side.
FixesQubesOS/qubes-issues#1312
dracut has apparently moved from /sbin to /bin some time in the past.
Accommodate this change to avoid failures.
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Archlinux now support pacman hooks that automatically handle both
building modules through dkms and rebuilding the initcpio.
For this reason, support scripts are not required anymore.
For example do not exclude (from exposing to qvm-block) loop devices
with this flag set, otherwise `qvm-block -l` would not list just
attached disk image files.
FixesQubesOS/qubes-issues#2453
For example, attaching a device-mapper device to another VM increases
its "dmsetup info" open count in is_used(), which triggered its removal
from qvm-block.
The canonical device name is not necessarily used in /proc/mounts or
/proc/self/mountinfo, see /dev/dm-0 vs. /dev/mapper/dmroot. (And only
checking by major:minor is not possible in the case of btrfs.)
Also fixes another bug where e.g. dm-10 would match when really only
dm-1 was mounted, or when the mountpoint path included the device name,
etc.
Also catches enabled swap.
Apparently some devices do not comply with standards (there is no such
thing as USB version 2.01), but other than that works fine. So take into
account only the major number of bcdUSB field.
FixesQubesOS/qubes-issues#2158
Those devices are most likely attached using "PV USB" from another
domain, so it doesn't make sense to list them as available for further
passthrough.
QubesOS/qubes-issues#531
