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When `SELinuxContext=` parameter is prefixed with `-`, the documentation states
that any errors determining or changing context should be ignored, but this
doesn't actually happen and the service may fail with `229/SELINUX_CONTEXT`.
Fix by adding checks to `context->selinux_context_ignore`.
Closes: #21057
We're actually falling back to `more` in the mkosi image which doesn't
behave quite the same as less which is somewhat annoying. Let's make
sure `less` is installed so systemd can use it as the pager.
The checks for finding a new available address in the pool were broken in two
ways: not using UINT32_TO_PTR() on hashmap lookups resulted in false negatives,
and the check wasn't skipping the server address if that was part of the pool.
Move the check for available addresses to a small helper function and fix both
issues, and also add a check to the REQUEST code for the server address.
The DHCP server configuration supports setting a maximum lease time, but old
leases are never actually cleared out if the client doesn't send a RELEASE.
This causes the pool to run out of addresses on networks where clients just
disappear, which is a fairly common occurrence on wireless networks.
Fix this by cleaning up expired leases before processing client requests, so
addresses can be reused for new clients.
This makes sure that a switch like --bind=:/foo does the right thing if
user namespacing is one: the backing dir should be owned by the
container's root UID not the host's. Thus, whenever the source path is
left empty and we automatically generate a source dir as temporary
directory, ensure it's owned by the right UID.
Fixes: #20869
This shows the cgroup tree of the root slice of the container now, by
querying the cgroup pid tree via the bus instead of going directly to
the cgroupfs.
A fallback is kept for really old systemd versions where querying the
PID tree was not available.
Fixes: #20958
Otherwise we likely show rubbish because even in local containers we
nowadays have cgroup namespacing, hence we likely can't access the
cgroup tree from the host at the same place as inside the container.
The utility function parse_integrity_options is used to both validate
integritytab options or validate and return values. In the case where
we are validating only and we have specific value options we will
assert.
Those devices show up as /sys/devices/vif-N, let's use that number
to name them enXN.
Without this, all schemes fail and they keep the kernel names, which can
be racy.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To prevent situations like in #17602 from happening, let's drop
direct recursive template dependencies. These will almost certainly
lead to infinite recursion so let's drop them immediately to avoid
instantiating potentially thousands of irrelevant units.
Example of a template that would lead to infinite recursion which
is caught by this check:
notify@.service:
```
[Unit]
Wants=notify@%n.service
```
When combined with a tmpfs on /run or /var/lib, allows to create
arbitrary and ephemeral symlinks for StateDirectory or RuntimeDirectory.
This is especially useful when sharing these directories between
different services, to make the same state/runtime directory 'backend'
appear as different names to each service, so that they can be added/removed
to a sharing agreement transparently, without code changes.
An example (simplified, but real) use case:
foo.service:
StateDirectory=foo
bar.service:
StateDirectory=bar
foo.service.d/shared.conf:
StateDirectory=
StateDirectory=shared:foo
bar.service.d/shared.conf:
StateDirectory=
StateDirectory=shared:bar
foo and bar use respectively /var/lib/foo and /var/lib/bar. Then
the orchestration layer decides to stop this sharing, the drop-in
can be removed. The services won't need any update and will keep
working and being able to store state, transparently.
To keep backward compatibility, new DBUS messages are added.
This teachs the LUKS backend UID mapping, similar to the existing
logic for the "directory", "subvolume" and "fscrypt" backends: the files
will be owned by "nobody" on the fs itself, but will be mapped to
logging in user via uidmapped mounts.
This way LUKS home dirs become truly portable: no local UID info will
leak onto the images anymore, and the need to recursively chown them on
activation goes away. This means activation is always as performant as
it should be.
Now that all objects we need to destroy are managed by the HomeSetup
object we can drop our manual destruction path and just use the normal
clean-up logic implemented for HomeSetup anyway. More unification, yay!
Let's simplify things further a bit and move the destruction of the
temporary image file we operate on when creating a LUKS home into
HomeSetup, like all our other resources.
Now that we stored all our different objects inside the HomeSetup
structure, we can get rid of our manual clean-up path, since
home_setup_done() will clean up everything stored therein anyway, in the
right order.
This is the main reason we moved everything into HomeSetup in the
previous commits: so that we can share clean-up paths for these objects
with everything else.
We actually already detach/free the LUKS DM devices for most operations
via HomeSetup, let's move the creation logic to also do this, in order
to unify behaviour between operations.
