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Apparently, disk IO issues are more frequent than we hope, and 1min
waiting for disk IO happens, so let's increase the watchdog timeout a
bit, for all our services.
See #1353 for an example where this triggers.
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We are already sending watchdog notification, this tells PID1 to actually listen for
them and restart udevd in case it gets stuck.
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The daemons should really have the time to kill the workers first,
before systemd does it, hence use KillMode=mixed for these daemons.
https://bugs.freedesktop.org/show_bug.cgi?id=90051
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udev-trigger
Let's move the hwdb regeneration a bit later. Given that hwdb is
non-essential it should be OK to allow udev to run without it until we
do the full trigger.
http://lists.freedesktop.org/archives/systemd-devel/2015-April/030074.html
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Only when necessary of course, nicely guarded with the new
ConditionNeedsUpdate= condition we added.
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logind needs access to /run/user/, udevd fails during early boot
with these settings
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ReadOnlySystem= uses fs namespaces to mount /usr and /boot read-only for
a service.
ProtectedHome= uses fs namespaces to mount /home and /run/user
inaccessible or read-only for a service.
This patch also enables these settings for all our long-running services.
Together they should be good building block for a minimal service
sandbox, removing the ability for services to modify the operating
system or access the user's private data.
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Keep mounts done by udev rules private to udevd. Also, document how
MountFlags= may be used for this.
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As of kmod v14, it is possible to export the static node information from
/lib/modules/`uname -r`/modules.devname in tmpfiles.d(5) format.
Use this functionality to let systemd-tmpfilesd create the static device nodes
at boot, and drop the functionality from systemd-udevd.
As an effect of this we can move from systemd-udevd to systemd-tmpfiles-setup-dev:
* the conditional CAP_MKNOD (replaced by checking if /sys is mounted rw)
* ordering before local-fs-pre.target (see 89d09e1b5c65a2d97840f682e0932c8bb499f166)
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Not that it would matter much, but let's make things a bit more
systematic: early boot services shall order themselves before
sysinit.target, and nothing else.
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static nodes (like /dev/loop-control) are created when systemd-udevd
is started and needed to mount loopback devices. Therefore,
local-fs-pre.target should be only started after systemd-udevd is
started.
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These services should be restarted as quickly as possible if they fail,
and the extra safety net of the holdoff time is not necessary.
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This naming convention is more inline with other systemd daemon
unit names (systemd-logind.service, systemd-localed.service etc)
The companion .socket units have also been renamed, however the
-trigger and -settle units keep their current name as these are
not directly related to daemon process itself.
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