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This takes inspiration from PropagatesReloadTo=, but propagates
stop jobs instead of restart jobs.
This is defined based on exactly two atoms: UNIT_ATOM_PROPAGATE_STOP +
UNIT_ATOM_RETROACTIVE_STOP_ON_STOP. The former ensures that when the
unit the dependency is originating from is stopped based on user
request, we'll propagate the stop job to the target unit, too. In
addition, when the originating unit suddenly stops from external causes
the stopping is propagated too. Note that this does *not* include the
UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT atom (which is used by BoundBy=),
i.e. this dependency is purely about propagating "edges" and not
"levels", i.e. it's about propagating specific events, instead of
continious states.
This is supposed to be useful for dependencies between .mount units and
their backing .device units. So far we either placed a BindsTo= or
Requires= dependency between them. The former gave a very clear binding
of the to units together, however was problematic if users establish
mounnts manually with different block device sources than our
configuration defines, as we there might come to the conclusion that the
backing device was absent and thus we need to umount again what the user
mounted. By combining Requires= with the new StopPropagatedFrom= (i.e.
the inverse PropagateStopTo=) we can get behaviour that matches BindsTo=
in every single atom but one: UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT is
absent, and hence the level-triggered logic doesn't apply.
Replaces: #11340
Let's add an implicit reverse dep OnFailureOf=. This is exposed via the
bus to make things more debuggable: you can now ask systemd for which
units a specific unit is the failure handler.
OnFailure= was the only dependency type that had no inverse, this fixes
that.
Now that deps are a bit cheaper, it should be OK to add deps that only
serve debug purposes.
The slice a unit is assigned to is currently a UnitRef reference. Let's
turn it into a proper dependency, to simplify and clean up code a bit.
Now that new dep types are cheaper, deps should generally be preferable
over everything else, if the concept applies.
This brings one major benefit: we often have to iterate through all unit
a slice contains. So far we iterated through all Before= dependencies of
the slice unit to achieve that, filtering out unrelated units, and
taking benefit of the fact that slice units are implicitly ordered
Before= the units they contain. By making Slice= a proper dependency,
and having an accompanying SliceOf= dependency type, this is much
simpler and nicer as we can directly enumerate the units a slice
contains.
The forward dependency is actually called InSlice internally, since we
already used the UNIT_SLICE name as UnitType field. However, since we
don't intend to expose the dependency to users as dep anyway (we already
have the regular Slice D-Bus property for this) this shouldn't matter.
The SliceOf= implicit dependency type (the erverse of Slice=/InSlice=)
is exported over the bus, to make things a bit nicer to debug and
discoverable.
In a later commit we intend to move the slice logic to use proper
dependencies instead of a "UnitRef" object. This preparatory commit
drops direct use of the slice UnitRef object for a static inline
function UNIT_GET_SLICE() that is both easier to grok, and allows us to
easily replace its internal implementation later on.
Previously, when a link has already in a numbered group, we cannot
remove the link from the group.
This also fixes the range mentioned in the man page.
The manpage says that exiting 77 is the same as exiting 0,
then skipping all other hooks, but the behaviour heretofor
was to exit 0, skip all, and behave as if all hooks exited 0
This is not very pretty, but the code in fs-util.c already provisions for
missing /proc. We ourselves are careful to set up /proc, but not everybody
is and it is important for sysusers to also work where shadow-utils would:
I would like to replace calls to useradd and groupadd in Fedora systemd rpm
scriptlets with a call to sysusers. It has a number of advantages:
- dogfooding
- we don't need to manually duplicate the information from our sysusers
files to scriptlets
- a dependency on shadow-utils is dropped, which transitively drops dependencies
on setup and fedora-repos and bunch of other stuff.
We could try to get 'dnf' and 'rpm --root' and such to be reworked,
but not in any reasonable timeframe. And even if this was done, we'd still
want to support older rpm/dnf versions.
I'm trying to use systemd-sysusers for systemd.rpm itself, and the invocation
in dnf chroot is failing like this:
...
Creating group input with gid 999.
Creating group kvm with gid 36.
Creating group render with gid 998.
Creating group sgx with gid 997.
Creating group systemd-journal with gid 190.
Creating group systemd-network with gid 192.
Creating user systemd-network (systemd Network Management) with uid 192 and gid 192.
Creating group systemd-oom with gid 996.
Creating user systemd-oom (systemd Userspace OOM Killer) with uid 996 and gid 996.
Creating group systemd-resolve with gid 193.
Creating user systemd-resolve (systemd Resolver) with uid 193 and gid 193.
Creating group systemd-timesync with gid 995.
Creating user systemd-timesync (systemd Time Synchronization) with uid 995 and gid 995.
Creating group systemd-coredump with gid 994.
Creating user systemd-coredump (systemd Core Dumper) with uid 994 and gid 994.
Failed to write files: Function not implemented
Let's add more info to make such failures easier to debug.
Add quotes around use of $env{MODALIAS} in rules.d/80-drivers.rules. The
modalias can contain whitespace, for example when it is dynamically generated
using device or vendor IDs.
There are nothing we can configure in udevd for loopback interfaces;
no ethertool configs can be applied, MAC address, interface name should
not be touched.
ethtool_set_glinksettings() already fallback to use ETHTOOL_GSET/ETHTOOL_SSET
commands when ETHTOOL_GLINKSETTINGS/ETHTOOL_SLINKSETTINGS are not
supported.
