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We generally try to support 2y old kernels, which allows us bump the
minimal required version to 3.11 now.
Also, clarify that support for the unified cgroup hierarchy requires 4.2
or newer.
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Remove two freshly implemented features, and add TSO support as a new
one.
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A variety of sd-event, sd-login and cgroup fixes
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This adds a new sd_pid_get_cgroup() call to sd-login which may be used
to query the control path of a process. This is useful for programs when
making use of delegation units, in order to figure out which subtree has
been delegated.
In light of the unified control group hierarchy this is finally safe to
do, hence let's add a proper API for it, to make it easier to use this.
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login: fix NULL-deref on wall_message
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systemd-mailing-devs/1441372815-12195-1-git-send-email-hdegoede@redhat.com
hwdb: Add Thinkpad T550 / W550s to 70-pointingstick.hwdb
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We treat an empty wall-message equal to a NULL wall-message since:
commit 5744f59a3ee883ef3a78214bd5236157acdc35ba
Author: Lennart Poettering <lennart@poettering.net>
Date: Fri Sep 4 10:34:47 2015 +0200
logind: treat an empty wall message like a NULL one
Fix the shutdown scheduler to not deref a NULL pointer, but properly
check for an empty wall-message.
Fixes: #1120
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shell-completion: update systemctl bash completion
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networkd: adjust error codes for nonexisting DHCP data
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tests: Skip tests which need to access /sys/fs/cgroup if that is not …
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Initial set of features for the upcoming v226 release next week. This is
mostly about the unified cgroup hierarchy and DHCP.
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Many new options have been added since the bash completion was last
updated.
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Commit 0339cd770 changed libsystemd-network's error code for missing DHCP lease
data from ENOENT to ENODATA. Adjust networkd accordingly.
This fixes interfaces being stuck in "degraded/configuring" mode forever.
https://github.com/systemd/systemd/issues/1147
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Commit efdb023 ("core: unified cgroup hierarchy support") introduced a new
error ENOEXEC in cg_unified() if /sys/fs/cgroup/ is not available. Adjust the
"skip" checks in various tests accordingly.
Add a corresponding "skip" check to test-bus-creds as well, as
sd_bus_creds_new_from_pid() now calls cg_unified() as well.
This re-fixes "make check" in build chroots without /sys/fs/cgroup.
https://github.com/systemd/systemd/issues/1132
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Like many other recent thinkpads the factory default pointingstick
sensitivity on these devices is quite low, making the pointingstick
very slow in moving the cursor.
This extends the existing hwdb rules for tweaking the sensitivity to
also apply to the T550 / W550s models.
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1200717
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bus-proxy: increase NOFILE limit
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Various logind fixes
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The bus-proxy manages the kdbus connections of all users on the system
(regarding the system bus), hence, it needs an elevated NOFILE.
Otherwise, a single user can trigger ENFILE by opening NOFILE connections
to the bus-proxy.
Note that the bus-proxy still does per-user accounting, indirectly via
the proxy/fake API of kdbus. Hence, the effective per-user limit is not
raised by this. However, we now prevent one user from consuming the whole
FD limit of the shared proxy.
Also note that there is no *perfect* way to set this. The proxy is a
shared object, so it needs a larger NOFILE limit than the highest limit
of all users. This limit can be changed dynamically, though. Hence, we
cannot protect against it. However, a raised NOFILE limit is a privilege,
so we just treat it as such and basically allow these privileged users to
be able to consume more resources than normal users (and, maybe, cause
some limits to be exceeded by this).
Right now, kdbus hard-codes 1024 max connections per user on each bus.
However, we *must not* rely on this. This limits could be easily dropped
entirely, as the NOFILE limit is a suitable limit on its on.
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And not bool.
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Delegation to unpriviliged processes is safe in the unified hierarchy,
hence allow it. This has the benefit of permitting "systemd --user"
instances to further partition their resources between user services.
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Makre sure we always return sensible errors for the various, following
the same rules, and document them in a comment in sd-login.c. Also,
update all relevant man pages accordingly.
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RT signals operate in a queue, and we should be careful to never merge
two queued signals into one. Hence, makes sure we only ever dequeue a
single signal at a time and leave the remaining ones queued in the
signalfd. In order to implement correct priorities for the signals
introduce one signalfd per priority, so that we only process the highest
priority signal at a time.
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In the unified hierarchy delegating controller access is safe, hence
make sure to enable all controllers for the "payload" subcgroup if we
create it, so that the container will have all controllers enabled the
nspawn service itself has.
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local container
Otherwise we might end up thinking that we support more controllers than
actually enabled for the container we are running in.
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found
If the controller managed by systemd cannot found in /proc/$PID/cgroup,
return ENODATA, the usual error for cases where the data being looked
for does not exist, even if the process does.
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Previously, on the legacy hierarchy a non-existing cgroup was considered
identical to an empty one, but the unified hierarchy the check for a
non-existing one returned ENOENT.
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After all a path is a path is a path and we should use path_equal() to
comapre those.
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session
ENODATA is how we usually indicate such "missing info" cases, so we
should do this here, too.
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parse_uid() returns EINVAL for invalid strings, but ENXIO for the
(uid_t) -1 user ids in order to distinguish these two cases. Document
this.
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Let's move the actual cgroup part of it into a new separate function
manager_get_unit_by_pid_cgroup(), and then make
manager_get_unit_by_pid() just a wrapper that also checks the two pid
hashmaps.
Then, let's make sure the various calls that want to deliver events to
the owners of a PID check both hashmaps and the cgroup and deliver the
event to *each* of them. OTOH make sure bus calls like GetUnitByPID()
continue to check the PID hashmaps first and the cgroup only as
fallback.
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Let's simplify things a bit.
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This simply factors out the uid validation checks from parse_uid() and
uses them everywhere. This simply verifies that the passed UID is
neither 64bit -1 nor 32bit -1.
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This adds a new PID_TO_PTR() macro, plus PTR_TO_PID() and makes use of
it wherever we maintain processes in a hash table. Previously we
sometimes used LONG_TO_PTR() and other times ULONG_TO_PTR() for that,
hence let's make this more explicit and clean up things.
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Show the same recommended example file in all three man pages, just
highlight the different, relevant parts.
This should be less confusing for users, and clarify what we actually
recommend how /etc/nsswitch.conf is set up.
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The recent cgroup-rework changed the error code for un-mounted cgroupfs to
ENOEXEC. Make sure udev ignores it just like ENOENT and does not spill
warnings on the screen.
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hwdb: Add Mionix Mouse
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cgroup-util: Removed unreachable statement in cg_get_path
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controller cannot be NULL because if-statement in L509 has return
Coverity #1322379
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scope: do not compare a bool return with "<= 0"
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tree-wide: fix indentation
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udev: net_id - support predictable ifnames on virtio buses
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