DNS queries have a timeout of DNS_TRANSACTION_ATTEMPTS_MAX *
DNS_TIMEOUT_MAX_USEC = 120 s. Calls to the ResolveHostname method of
the org.freedesktop.resolve1.Manager interface have various call
timeouts that are smaller than 120 s. So it seems correct to adjust
the call timeout to the maximum query timeout and to unify the call
timeout among all callers.
A timeout of 120 s might seem large, in particular since BIND does seem
to have a query timeout of 10 s. However, it seems match the timeout
value of 120 s of Unbound. Moreover, the query and timeout handling of
resolve have problems and might be improved in the future, so this
change is at best an interim solution.
udev-made .device aliases are not normal alias
They are full-fledged units which are linked to
the same sysfs path
we need to explicitely propagate reload to all
alias
New debug verb that enables or disables the service runtime watchdogs
and emergency actions during runtime. This is the systemd-analyze
version of the systemd.service_watchdogs command line option.
Incorporating the fix from d00f1d57 into other output formats of journalctl.
If journal files are corrupted, e.g. not cleanly closed, some journal
entries can not be read by output options other than 'short' (default).
If such entries has been identified, they will now just be skipped.
When a unit job finishes early (e.g. when fork(2) fails) triggered unit goes
through states
stopped->failed (or failed->failed),
in case a ExecStart= command fails unit passes through
stopped->starting->failed.
The former transition doesn't result in unit active/inactive timestamp being
updated and timer (OnUnitActiveSec= or OnUnitInactiveSec=) would use an expired
timestamp triggering immediately again (repeatedly).
This patch exploits timer's last trigger timestamp to ensure the timer isn't
triggered more frequently than OnUnitActiveSec=/OnUnitInactiveSec= period.
Steps to reproduce:
0) Create sample units:
cat >~/.config/systemd/user/looper.service <<EOD
[Service]
ExecStart=/usr/bin/sleep 2
EOD
cat >~/.config/systemd/user/looper.timer <<EOD
[Timer]
AccuracySec=5
OnUnitActiveSec=5
EOD
1) systemctl --user daemon-reload
2) systemctl --user start looper.timer
# to have first activation timestamp/sentinel
systemctl --user start looper.service
o Observe the service is being regularly triggered.
3) systemctl set-property user@$UID.service TasksMax=2
o Observe the tight looping as long as the looper.service cannot be started.
Ref: #5969
The cgroup "pids" controller is not supported on the root cgroup.
However we expose TasksMax= on it, but currently don't actually apply it
to anything. Let's correct this: if set, let's propagate things to the
right sysctls.
This way we can expose TasksMax= on all units in a somewhat sensible
way.
The maximum number of processes a tasks on the system is usually lower
than what pid_t would allow, and is compiled into the kernel (and
documented in proc(5)). Let's add proper defines for that, so that
we can adjust the pid_max sysctl without fearing invalid accesses.
canonicalize_file_name() invocations were replaced by chase_symlinks() in
Decemeber 2016 with PR #4694, so we don't need this mention in the TODO anymore
The DHCPv6 client can obtain configuration parameters from a
DHCPv6 server through a rapid two-message exchange solicit and reply).
When the rapid commit option is enabled by both the DHCPv6 client and
the DHCPv6 server, the two-message exchange is used, rather than the default
four-method exchange (solicit, advertise, request, and reply). The two-message
exchange provides faster client configuration and is beneficial in environments
in which networks are under a heavy load.
Closes#5845
This happens to be almost the same moment as when we send READY=1 in the user
instance, but the logic is slightly different, since we log taint when
basic.target is reached in the system manager, but we send the notification
only in the user manager. So add a separate flag for this and propagate it
across reloads.
Fixes#7683.
The commit f14f1806e3 introduced CHASE_SAFE
flag. When the flag is set, then `fd_parent` may not be properly closed.
This sets `_cleanup_close_` attribute to `fd_parent`.
Thus, now `fd_parent` is always closed properly.
It was forbidden to create mount units for a symlink. But the reason is
that the mount unit needs to know the real path that will appear in
/proc/self/mountinfo. The kernel dereferences *all* the symlinks in the
path at mount time (I checked this with `mount -c` running under `strace`).
This will have no effect on most systems. As recommended by docs, most
systems use /etc/fstab, as opposed to native mount unit files.
fstab-generator dereferences symlinks for backwards compatibility.
A relatively minor issue regarding Time Of Check / Time Of Use also exists
here. I can't see how to get rid of it entirely. If we pass an absolute
path to mount, the racing process can replace it with a symlink. If we
chdir() to the mount point and pass ".", the racing process can move the
directory. The latter might potentially be nicer, except that it breaks
WorkingDirectory=.
I'm not saying the race is relevant to security - I just want to consider
how bad the effect is. Currently, it can make the mount unit active (and
hence the job return success), despite there never being a matching entry
in /proc/self/mountinfo. This wart will be removed in the next commit;
i.e. it will make the mount unit fail instead.
Martin Pitt
Maciej S. Szmigiero
ott
lbernstone
Yu Watanabe
Gianluca Boiano
Olivier Schwander
Jan Klötzke
Lennart Poettering
Reverend Homer
Jérémy Rosen
Jan Klötzke
Armin Widegreen
Michal Koutný
Susant Sahani
Frantisek Sumsal
Susant Sahani
Zbigniew Jędrzejewski-Szmek
Alan Jenkins