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Always say when we ignore errors. Cast calls whose return value we
knowingly ingore to (void). Use "bool" where we actually mean a boolean,
even if we return it as an int later on.
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It's cheaper that going to cgroupfs, and also usually the better choice
since it's not racy and can map PIDs even if they were moved to a
different unit.
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In all cases where the function (or cg_is_empty_recursive()) ignoring
the calling process is actually wrong, as a process keeps a cgroup busy
regardless if its the current one or another. Hence, let's simplify
things and drop the "ignore_self" parameter.
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A number of simplications and adjustments to brings things closer to our
coding style.
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We really should care for all cgroups, and not allow hidden ones.
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It won't work anyway.
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The legacy cgroup hierarchy does not support reliable empty
notifications in containers and if there are left-over subgroups in a
cgroup. This makes it hard to correctly wait for them running empty, and
thus we previously disabled this logic entirely.
With this change we explicitly check for the container case, and whether
the unit is a "delegation" unit (i.e. one where programs may create
their own subgroups). If we are neither in a container, nor operating on
a delegation unit cgroup empty notifications become reliable and thus we
start waiting for the empty notifications again.
This doesn't really fix the general problem around cgroup notifications
but reduces the effect around it.
(This also reorders #include lines by their focus, as suggsted in
CODING_STYLE. We have to add "virt.h", so let's do that at the right
place.)
Also see #317.
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Rework the "service is good" check, to only check the cgroup state if we
really need to instead of always.
This allows us to suppress going to the cgroupfs for an empty check for
the majority of services.
No functional change.
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Instead, remember that we have already written it.
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let's return ENXIO whenever we don't know something rather than ENOENT.
ENOENT suggests this was really about a file or directory, while ENXIO
is a more generic "not found" indicator.
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Like we do it pretty much everywhere else.
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networkd: add support for tunnel encap limit
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On Dell and HP laptops the dock state/events (SW_DOCK) come from the "{Dell,HP}
WMI hotkeys" input devices. Tag them as power-switch so that login actually
considers them. Use a general match in case this affects other vendors, too.
Thanks to Andreas Schultz for debugging this!
https://launchpad.net/bugs/1450009
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dhcp-server: make pool configurable
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The constraints we place on the pool is that it is a contiguous
sequence of addresses in the same subnet as the server address, not
including the subnet nor broadcast addresses, but possibly including
the server address itself. If the server address is included in the
pool it is (obviously) reserved and not handed out to clients.
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Don't restrict yourselves to 32 leases, simply manage the whole subnet by default.
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Merge sd_dhcp_server_set_address() and sd_dhcp_server_set_lease_pool() into
sd_dhcp_server_configure_pool() as the behavior of the two former depends
on the order they are called in. The flexibility is not needed, so let's
just do this in one call.
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dbus-1.10 was just released, including systemd units to run
`dbus-daemon --session` as systemd user unit. This allows using a
user-bus with dbus1, just like we do per default with kdbus.
All the dbus libraries have already been fixed long ago to use the
user-bus as default. Hence, there's no need to set
DBUS_SESSION_BUS_ADDRESS= if we use the user-bus. However, gdm and
friends continue to spawn a session bus if this variable is not set
(instead of checking for the existence of the user-bus). Hence, we force
the user-bus, if it is available, in pam_systemd. Once gdm and friends
are fixed, we can continue to drop this again. However, that might take
a while.
With this in place, all that is needed to make the user-bus work is:
`systemctl --global enable dbus.socket`
If dbus.socket is not enabled, the legacy session-bus is still used.
Based on a patch by: Jan Alexander Steffens <jan.steffens@gmail.com>
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Never report errors twice.
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Let's help users to debug issues with epoll fd removal by printing the
name of the event source.
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Make sure show it as "/" rather than empty string.
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Otherwise we might attempt to remove a non-existing fd from epoll.
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When showing the number of tasks in a cgroup, recursively count tasks in
child cgroups and include them in the number. This ensures that the
number of tasks is cummulative the same way as memory, cpu and IO
resources are.
Old behaviour can be restored by passing the new --recursive=no switch.
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However, allow them to be counted in by specifying -k
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This way the output is restricted to cgroups from a container when run
in one.
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This way we can be sure that less has the same idea of the terminal as
we do.
This solves issues in systems that have locale uninitalized, where
systemd would output UTF-8 but less wouldn't allow it and show them as
control characters.
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This adds a new call unit_set_slice(), and simplifies
unit_add_default_slice(). THis should make our code a bit more robust
and simpler.
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We store the properties for transient units in drop-ins anyway, and
units don't have to have fragment files, hence don't bother with them,
and don't create them.
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A few more tweaks to extract_first_word
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The Tunnel Encapsulation Limit option specifies how many additional
levels of encapsulation are permitted to be prepended to the packet
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Refactor allocation of the result string to the top, since it is
currently done in both branches of the condition.
Remove unreachable code checking for EXTRACT_DONT_COALESCE_SEPARATORS
when state == SEPARATOR (the only place where SEPARATOR is assigned to
state follows a check for EXTRACT_DONT_COALESCE_SEPARATORS that jumps to
the end of the function.)
Tested by running test-util successfully.
Follow up to: 206644aedeb8859801051ac170ec562c6a113a79
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This covers the case where an argument is an empty string, such as ''.
Instead of allocating the empty string in the individual conditions when
state == VALUE, just always allocate it at the end of state == START, at
which point we know we will have an argument.
Tested that test-util keeps passing after the refactor.
Follow up to: 14e685c29d5b317b815e3e9f056648027852b07e
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Must be _cleanup_fclose_ not _cleanup_free_
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util: make malloc0 ask calloc for one block of size n
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We may not set it before checking it for null.
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... instead of an array of n individual bytes.
Silences a lot of warnings in smatch.
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