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located in
We place the processes we fork off in the cgroup anyway, and we probably
shouldn't be able to get that far if we couldn't set up the slice due to
resource problems or unmet conditions. Hence upgrade the dependency
between units and the slices they are located in from Wants= to
Requires=.
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This introduces a new systemd.crash_reboot=1 kernel command line option
that triggers a reboot after crashing.
This also cleans up crash VT handling. Specifically, it cleans up the
configuration setting, to be between 1..63 or a boolean. This is to
replace the previous logic where "-1" meant disabled. We continue to
accept that setting, but only document the boolean syntax instead.
This also brings the documentation of the default settings in sync with
what actually happens.
The CrashChVT= configuration file setting is renamed to CrashChangeVT=,
following our usual logic of not abbreviating unnecessarily. The old
setting stays support for compat reasons.
Fixes #1300
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The relation to USB should really be clearer.
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Let's always return the allocated fds as return values where possible,
and make more use of _cleanup_close_
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If set to ~ the working directory is set to the home directory of the
user configured in User=.
This change also exposes the existing switch for the working directory
that allowed making missing working directories non-fatal.
This also changes "machinectl shell" to make use of this to ensure that
the invoked shell is by default in the user's home directory.
Fixes #1268.
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This also allows us to drop build.h from a ton of files, hence do so.
Since we touched the #includes of those files, let's order them properly
according to CODING_STYLE.
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This is highly complex code after all, we really should make sure to
only keep one implementation of this extremely difficult function
around.
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The new free_and_strdup() call does pretty much the same thing these
days, no need to keep a private limited purpose version around.
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Add (void) casting for a couple of functions where we knowingly ignore
the returning error code.
Use EXIT_FAILURE where appropriate.
Try to initialize structures at declaration time, or at once.
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Let's teach it a new trick, and make it return NULL.
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Also, make it slightly more powerful, by accepting a flags argument, and
make it safe for handling if more than one cmsg attribute happens to be
attached.
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Tested with a dummy service running 'sleep', modifying its CPUAffinity,
restarting the service and checking the ^Cpus_allowed entries in the
/proc/PID/status file.
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Use the new code in config_parse_cpu_affinity2.
Tested by modifying CPUAffinity=... setting in /etc/systemd/system.conf
and reloading the daemon, then checking ^Cpus_allowed in /proc/1/status
to confirm the correct CPU mask is in place.
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core: make setup_pam() synchronous
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This cleans up exec_child() function by moving mac_smack_apply_pid()
and setup_pam() to the same condition block, since both of them have
the same condition (i.e params->apply_permissions). It improves
readability without changing its operation.
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When 'SmackProcessLabel=' is used in user@.service file, all processes
launched in systemd user session should be labeled as the designated name
of 'SmackProcessLabel' directive. However, if systemd has its own smack
label using '--with-smack-run-label' configuration, '(sd-pam)' is
labeled as the specific name of '--with-smack-run-label'. If
'SmackProcessLabel=' is used in user@.service file without
'--with-smack-run-label' configuration, (sd-pam) is labeled as "_" since
systemd (i.e. pid=1) is labeled as "_".
This is mainly because setup_pam() function is called before applying
smack label to child process. This patch fixes it by calling setup_pam()
after setting the smack label.
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Hook more properties for transient units
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systemd-run can now launch units with WorkingDirectory, RootDirectory set.
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If we spawn a unit with a non-empty 'PAMName=', we fork off a
child-process _inside_ the unit, known as '(sd-pam)', which watches the
session. It waits for the main-process to exit and then finishes it via
pam_close_session(3).
However, the '(sd-pam)' setup is highly asynchronous. There is no
guarantee that process gets spawned before we finish the unit setup.
Therefore, there might be a root-owned process inside of the cgroup of
the unit, thus causing cg_migrate() to error-out with EPERM.
This patch makes setup_pam() synchronous and waits for the '(sd-pam)'
setup to finish before continuing. This guarantees that setresuid(2) was
at least tried before we continue with the child setup of the real unit.
Note that if setresuid(2) fails, we already warn loudly about it. You
really must make sure that you own the passed user if using 'PAMName='.
It seems very plausible to rely on that assumption.
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Shutting down a user session currently fails with:
Sep 22 22:35:38 david-t2 systemd[640]: Reached target Shutdown.
Sep 22 22:35:38 david-t2 systemd[640]: Starting Exit the Session...
Sep 22 22:35:38 david-t2 systemd[640]: Received SIGRTMIN+24 from PID 659 (kill).
Sep 22 22:35:38 david-t2 systemd[640]: Shutting down.
Sep 22 22:35:38 david-t2 systemd[640]: Not executed by init (PID 1).
Sep 22 22:35:38 david-t2 systemd[640]: Critical error while doing system shutdown: Operation not permitted
This is a regression from:
commit 287419c119ef961db487a281162ab037eba70c61
Author: Alban Crequy <alban.crequy@gmail.com>
Date: Fri Sep 18 13:37:34 2015 +0200
containers: systemd exits with non-zero code
Make sure we never ever execute systemd-shutdown from within a
user-manager. Restore the previous behavior by partially reverting given
commit.
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A variety of mostly unrelated fixes
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core: add support for usb functionfs v3
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By using these parameters functionfs service can specify ffs descriptors
and strings which should be written to ep0.
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For handling functionfs endpoints additional socket type is added.
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Let's underline the header line of the table shown by cgtop, how it is
customary for tables. In order to do this, let's introduce new ANSI
underline macros, and clean up the existing ones as side effect.
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mount: use libmount to monitor mountinfo & utab
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Some additional files related to single socket may appear in the
filesystem and they should be opened and passed to related service.
This commit adds optional list of file descriptors, which are
dynamically discovered and opened.
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Make sure to propagate error codes from mount-loops correctly. Right now,
we return the return-code of the first mount that did _something_. This is
not what we want. Make sure we return an error if _any_ mount fails (and
then make sure to return the first error to not hide proper errors due to
consequential errors like -ENOTDIR).
Reported by cee1 <fykcee1@gmail.com>.
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When Group is set in the unit, the runtime directories are owned by
this group and not the default group of the user (same for cgroup paths
and standard outputs)
Fix #1231
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When a systemd service running in a container exits with a non-zero
code, it can be useful to terminate the container immediately and get
the exit code back to the host, when systemd-nspawn returns. This was
not possible to do. This patch adds the following to make it possible:
- Add a read-only "ExitCode" property on PID 1's "Manager" bus object.
By default, it is 0 so the behaviour stays the same as previously.
- Add a method "SetExitCode" on the same object. The method fails when
called on baremetal: it is only allowed in containers or in user
session.
- Add support in systemctl to call "systemctl exit 42". It reuses the
existing code for user session.
- Add exit.target and systemd-exit.service to the system instance.
- Change main() to actually call systemd-shutdown to exit() with the
correct value.
- Add verb 'exit' in systemd-shutdown with parameter --exit-code
- Update systemctl manpage.
I used the following to test it:
| $ sudo rkt --debug --insecure-skip-verify run \
| --mds-register=false --local docker://busybox \
| --exec=/bin/chroot -- /proc/1/root \
| systemctl --force exit 42
| ...
| Container rkt-895a0cba-5c66-4fa5-831c-e3f8ddc5810d failed with error code 42.
| $ echo $?
| 42
Fixes https://github.com/systemd/systemd/issues/1290
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cgroup: add support for net_cls controllers
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Add a new config directive called NetClass= to CGroup enabled units.
Allowed values are positive numbers for fix assignments and "auto" for
picking a free value automatically, for which we need to keep track of
dynamically assigned net class IDs of units. Introduce a hash table for
this, and also record the last ID that was given out, so the allocator
can start its search for the next 'hole' from there. This could
eventually be optimized with something like an irb.
The class IDs up to 65536 are considered reserved and won't be
assigned automatically by systemd. This barrier can be made a config
directive in the future.
Values set in unit files are stored in the CGroupContext of the
unit and considered read-only. The actually assigned number (which
may have been chosen dynamically) is stored in the unit itself and
is guaranteed to remain stable as long as the unit is active.
In the CGroup controller, set the configured CGroup net class to
net_cls.classid. Multiple unit may share the same net class ID,
and those which do are linked together.
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Hook more properties for transient units
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The current implementation directly monitor /proc/self/mountinfo and
/run/mount/utab files. It's really not optimal because utab file is
private libmount stuff without any official guaranteed semantic.
The libmount since v2.26 provides API to monitor mount kernel &
userspace changes and since v2.27 the monitor is usable for
non-root users too.
This patch replaces the current implementation with libmount based
solution.
Signed-off-by: Karel Zak <kzak@redhat.com>
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Let's make sure that we follow the same codepaths when adjusting a
cgroup property via the dbus SetProperty() call, and when we execute the
StartupCPUShares= effect.
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value for a reason
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In all occasions when this function is called we do so anyway, so let's
move this inside, to make things easier.
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