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With this change we'll no longer write to /etc/machine-id from nspawn, as that
breaks the --volatile= operation, as it ensures the image is never considered
in "first boot", since that's bound to the pre-existance of /etc/machine-id.
The new logic works like this:
- If /etc/machine-id already exists in the container, it is read by nspawn and
exposed in "machinectl status" and friends.
- If the file doesn't exist yet, but --uuid= is passed on the nspawn cmdline,
this UUID is passed in $container_uuid to PID 1, and PID 1 is then expected
to persist this to /etc/machine-id for future boots (which systemd already
does).
- If the file doesn#t exist yet, and no --uuid= is passed a random UUID is
generated and passed via $container_uuid.
The result is that /etc/machine-id is never initialized by nspawn itself, thus
unbreaking the volatile mode. However still the machine ID configured in the
machine always matches nspawn's and thus machined's idea of it.
Fixes: #3611
If we show both a control and a main PID for a service fix this line in the
output of "systemctl status":
Main PID: 19670 (sleep); : 19671 (sleep)
to become this:
Main PID: 19670 (sleep); Control PID: 19671 (sleep)
We currently have code to read and write files containing UUIDs at various
places. Unify this in id128-util.[ch], and move some other stuff there too.
The new files are located in src/libsystemd/sd-id128/ (instead of src/shared/),
because they are actually the backend of sd_id128_get_machine() and
sd_id128_get_boot().
In follow-up patches we can use this reduce the code in nspawn and
machine-id-setup by adopted the common implementation.
https://github.com/systemd/systemd/pull/3685 introduced
/run/systemd/inaccessible/{chr,blk} to map inacessible devices,
this patch allows systemd running inside a nspawn container to create
/run/systemd/inaccessible/{chr,blk}.
If the ESP is not mounted with "iocharset=ascii", but with "iocharset=utf8"
(which is for example the default in Debian), the file system becomes case
sensitive. This means that a file created as "FooBarBaz" cannot be accessed as
"foobarbaz" since those are then considered different files.
Moreover, a file created as "FooBar" can then also not be accessed as "foobar",
and it also prevents such a file from being created, as both would use the same
8.3 short name "FOOBAR".
Even though the UEFI specification [0] does give the canonical spelling for
the files mentioned above, not all implementations completely conform to that,
so it's possible that those files would already exist, but with a different
spelling, causing subtle bugs when scanning or modifying the ESP.
While the proper fix would of course be that everybody conformed to the
standard, we can work around this problem by just referencing the files by
their 8.3 short names, i.e. using upper case.
Fixes: #3740
[0] <http://www.uefi.org/specifications>, version 2.6, section 3.5.1.1
Normally we make all of /proc/sys read-only in a container, but if we do have
netns enabled we can make /proc/sys/net writable, as things are virtualized
then.
When a container scope is allocated via machined it gets 16K set already since
cf7d1a30e4. Make sure when a container is run as
system service it gets the same values.
We don't actually need any functionality from cgroup.h in execute.h, hence
don't include that. However, we do need the Unit structure from unit.h, hence
include that, and move it as late as possible, since it needs the definitions
from execute.h.
All other functions in execute.c that need the unit id take a Unit* parameter
as first argument. Let's change connect_logger_as() to follow a similar logic.
This way systemd is informed that we consider everything inside the scope as
"left-over", and systemd can log about killing it.
With this change systemd will log about all processes killed due to the session
clean-up on KillUserProcesses=yes.
Let's lot at LOG_NOTICE about any processes that we are going to
SIGKILL/SIGABRT because clean termination of them didn't work.
This turns the various boolean flag parameters to cg_kill(), cg_migrate() and
related calls into a single binary flags parameter, simply because the function
now gained even more parameters and the parameter listed shouldn't get too
long.
Logging for killing processes is done either when the kill signal is SIGABRT or
SIGKILL, or on explicit request if KILL_TERMINATE_AND_LOG instead of LOG_TERMINATE
is passed. This isn't used yet in this patch, but is made use of in a later
patch.
The rfkill service waits for rfkill device initialization as reported by
udev_device_is_initialized(), and if that is never reported it might dead-lock.
However, udev never reports completed initialization for devices that have no
properties or tags set. For some rfkill devices this might be the case, in
particular those which are connected to exotic busses, where path_id returns
nothing.
This patch simply sets the SYSTEM_RFKILL property on all rfkill devices, to
ensure that udev_device_is_initialized() always reports something useful and we
don't dead-lock.
Fixes: #2745
We generally try to avoid strerror(), due to its threads-unsafety, let's do
this here, too.
Also, let's be tiny bit more explanatory with the log messages, and let's
shorten a few things.
We usually hide legacy bus properties from introspection. Let's do that for the
InaccessibleDirectories= properties too.
The properties stay accessible if requested, but they won't be listed anymore
if people introspect the unit.
* Specifying a device node has an effect much larger than a simple shortcut
for a field/value match, so the original sentence is no longer a good way
to start the paragraph.
* Specifying a device node causes matches to be generated for all ancestor
devices of the device specified, not just its parents.
* Indicates that the path must be absolute, but that it may be a link.
* Eliminates a few typos.
This patch renames Read{Write,Only}Directories= and InaccessibleDirectories=
to Read{Write,Only}Paths= and InaccessiblePaths=, previous names are kept
as aliases but they are not advertised in the documentation.
Renamed variables:
`read_write_dirs` --> `read_write_paths`
`read_only_dirs` --> `read_only_paths`
`inaccessible_dirs` --> `inaccessible_paths`
Despite the name, `Read{Write,Only}Directories=` already allows for
regular file paths to be masked. This commit adds the same behavior
to `InaccessibleDirectories=` and makes it explicit in the doc.
This patch introduces `/run/systemd/inaccessible/{reg,dir,chr,blk,fifo,sock}`
{dile,device}nodes and mounts on the appropriate one the paths specified
in `InacessibleDirectories=`.
Based on Luca's patch from https://github.com/systemd/systemd/pull/3327
