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This has been requested many times before. Let's add it finally.
GPT auto-discovery for /var is a bit more complex than for other
partition types: the other partitions can to some degree be shared
between multiple OS installations on the same disk (think: swap, /home,
/srv). However, /var is inherently something bound to an installation,
i.e. specific to its identity, or actually *is* its identity, and hence
something that cannot be shared.
To deal with this this new code is particularly careful when it comes to
/var: it will not mount things blindly, but insist that the UUID of the
partition matches a hashed version of the machine-id of the
installation, so that each installation has a very specific /var
associated with it, and would never use any other. (We actually use
HMAC-SHA256 on the GPT partition type for /var, keyed by the machine-id,
since machine-id is something we want to keep somewhat private).
Setting the right UUID for installations takes extra care. To make
things a bit simpler to set up, we avoid this safety check for nspawn
and RootImage= in unit files, under the assumption that such container
and service images unlikely will have multiple installations on them.
The check is hence only required when booting full machines, i.e. in
in systemd-gpt-auto-generator.
To help with putting together images for full machines, PR #14368
introduces a repartition tool that can automatically fill in correctly
calculated UUIDs on first boot if images have the var partition UUID
initialized to all zeroes. With that in place systems can be put
together in a way that on first boot the machine ID is determined and
the partition table automatically adjusted to have the /var partition
with the right UUID.
get_block_device() is just the nicer way to do it (since it also odes
btrfs). Also, let's already collect the dev_t of the loopback device
when we enumerate things, that allows us to do the checks simpler
without constantly stat()ing things over and over again.
We fucked up errno vs. r two times, let's correct that.
While we are at it, let's handle the error first, like we usually do,
and the clean case without indentation.
This reverts commit 07125d24ee.
In contrast to what is claimed in #13396 dbus-broker apparently does
care for the service file to be around, and otherwise will claim
"Service Not Activatable" in the time between systemd starting up the
broker and connecting to it, which the stub service file is supposed to
make go away.
Reverting this makes the integration test suite pass again on host with
dbus-broker (i.e. current Fedora desktop).
Tested with dbus-broker-21-6.fc31.x86_64.
Write a user unit's invocation ID to /run/user/<uid>/systemd/units/ similar
to how a system unit's invocation ID is written to /run/systemd/units/.
This lets the journal read and add a user unit's invocation ID to the
_SYSTEMD_INVOCATION_ID field of logs instead of the user manager's
invocation ID.
Fixes#12474
This reverts commit 362c378291.
This commit introduced an ordering loop: remote-cryptsetup.target was both
before and after remote-fs-pre.target. It also globally ordered all cryptsetup
volumes before all mounts. Such global ordering is problematic if people have
stacked storage. Let's look for a different solution.
See https://github.com/systemd/systemd/pull/14378#discussion_r359460109.
To support ProtectHome=y in a user namespace (which mounts the inaccessible
nodes), the nodes need to be accessible by the user. Create these paths and
devices in the user runtime directory so they can be used later if needed.
The test exercises that PrivateTmp=yes and ProtectHome={read-only,tmpfs}
directives work as expected when PrivateUsers=yes in a user manager.
Some code is also added to test-functions to help set up test cases that
exercise the user manager.
Let per-user service managers have user namespaces too.
For unprivileged users, user namespaces are set up much earlier
(before the mount, network, and UTS namespaces vs after) in
order to obtain capbilities in the new user namespace and enable use of
the other listed namespaces. However for privileged users (root), the
set up for the user namspace is still done at the end to avoid any
restrictions with combining namespaces inside a user namespace (see
inline comments).
Closes#10576
PrefixRoute= was added by e63be0847c,
but unfortunately, the meaning of PrefixRoute= is inverted; when true
IFA_F_NOPREFIXROUTE flag is added. This introduces AddPrefixRoute=
setting.
This only matters for the case where new networkctl is running against older
networkd. We should still handle the old error to avoid unnecessary warning
about speedmeeter being disabled.
This partially reverts commit e813de549b.
Don't try to show top level drop-in for non-existent units or when trying to
instantiate non-instantiated units:
$ systemctl cat nonexistent@.service
Assertion 'name' failed at src/shared/dropin.c:143, function unit_file_find_dirs(). Aborting.
$ systemctl cat systemd-journald@.service
Assertion 'name' failed at src/shared/dropin.c:143, function unit_file_find_dirs(). Aborting.
Otherwise, systemd-udev-trigger|settle.service that ran in the initrd may
ramain active, and never re-run again from the system root.
This is observed by forexample examining ESP with udevadm info, which in the
initrd has all the ID_* variables, and none of them in fully booted system.
