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without working cgroup empty notifications there's no need to set the
stop timeout of sessions scopes low
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In some cases it is interesting to map a PID to two units at the same
time. For example, when a user logs in via a getty, which is reexeced to
/sbin/login that binary will be explicitly referenced as main pid of the
getty service, as well as implicitly referenced as part of the session
scope.
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that's requested
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Simplify the shutdown logic a bit:
- Keep the session FIFO around in the PAM module, even after the session
shutdown hook has been finished. This allows logind to track precisely
when the PAM handler goes away.
- In the ReleaseSession() call start a timer, that will stop terminate
the session when elapsed.
- Never fiddle with the KillMode of scopes to configure whether user
processes should be killed or not. Instead, simply leave the scope
units around when we terminate a session whose processes should not be
killed.
- When killing is enabled, stop the session scope on FIFO EOF or after
the ReleaseSession() timeout. When killing is disabled, simply tell
PID 1 to abandon the scope.
Because the scopes stay around and hence all processes are always member
of a scope, the system shutdown logic should be more robust, as the
scopes can be shutdown as part of the usual shutdown logic.
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reliable cgroup empty notifier
When a process dies that we can associate with a specific unit, start
watching all other processes of that unit, so that we can associate
those processes with the unit too.
Also, for service units start doing this as soon as we get the first
SIGCHLD for either control or main process, so that we can follow the
processes of the service from one to the other, as long as process that
remain are processes of the ones we watched that died and got reassigned
to us as parent.
Similar, for scope units start doing this as soon as the scope
controller abandons the unit, and thus management entirely reverts to
systemd. To abandon a unit introduce a new Abandon() scope unit method
call.
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introduced in c7040b5d1c2c148f12b6a5eef3dfce1661805131
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https://bugs.freedesktop.org/show_bug.cgi?id=74157
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Also remove some debug statement that should not have been committed.
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When doing 'command verb<TAB>', the arguments for verb would be
proposed, but it is too early. We should complete verb first.
https://bugs.freedesktop.org/show_bug.cgi?id=74596
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udev seems to have a race condition with swapon to see which can open
/dev/zram0 first, causing swapon to fail. Seems to be most noticeable
on arm devices one out of every 7 times or something.
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Use PID_FMT/USEC_FMT/... in more places.
Also update logind error messages to print the full path to a file that
failed. This should make debugging easier for people who do not know
off the top of their head where logind stores it state.
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This is initialized from XDG_SESSION_DESKTOP and is useful for GNOME
to recognize its own sessions. It's supposed to be set to a short string
identifying the session, such as "kde" or "gnome".
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If the session type/class is set via environment variables, use that,
and otherwise fallback to something that is set via the PAM module
command line.
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on the host either
Since the current kernel cgroup notification logic is easily confused by
existing subgroups, let's do the same thing as in containers before. and
just not wait for non-control and non-main processes.
This should be corrected as soon as we have sane cgroup notifications
from the kernel.
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creating a transient service
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Added sd_rtnl_message_append_u8 and
few attribute support in sd_rtnl_message_append_u32
IFLA_GROUP, IFLA_TXQLEN, IFLA_NUM_TX_QUEUES, IFLA_NUM_RX_QUEUES
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- As suggested, prefix argument variables with "arg_" how we do this
usually.
- As suggested, don't involve memory allocations when storing command
line arguments.
- Break --help text at 80 chars
- man: explain that this is about SELinux
- don't do unnecessary memory allocations when putting together mount
option string
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This patch adds to new options:
-Z PROCESS_LABEL
This specifies the process label to run on processes run within the container.
-L FILE_LABEL
The file label to assign to memory file systems created within the container.
For example if you wanted to wrap an container with SELinux sandbox labels, you could execute a command line the following
chcon system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -R /srv/container
systemd-nspawn -L system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -Z system_u:system_r:svirt_lxc_net_t:s0:c0,c1 -D /srv/container /bin/sh
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This is now part of libsystemd.
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Thomas H.P. Andersen <phomes@gmail.com> wrote:
> Does -lresolv belong in libsystemd_la_CFLAGS? I would have thought
> that it should be in LIBADD for the lib and LDADD for the test.
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Ensure to start getty programs on all essential system consoles on Linux on
System z. Add these essential devices to the list of virtualization_consoles
to always generate getty configurations.
For the sake of completion, the list of essential consoles is:
/dev/sclp_line0 - Operating system messages applet (LPAR)
/dev/ttysclp0 - Integrated ASCII console applet (z/VM and LPAR)
/dev/ttyS0 - Already handled by systemd (3215 console on z/VM)
/dev/hvc0 - Already handled by systemd (IUCV HVC terminal on z/VM)
Depending on the environment, z/VM or LPAR, only a subset of these terminals
are available.
See also RH BZ 860158[1] "Cannot login via Operating System Console into RHEL7
instance installed on a LPAR". This bugzilla actually blocks the installation
of Linux on System z instances in LPAR mode.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=860158
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By specifiy a Controller property when creating the scope a client can
specify a bus name that will be notified with a RequestStop bus signal
when the scope has been asked to shut down, instead of sending SIGTERM
to the scope processes themselves.
https://bugzilla.redhat.com/show_bug.cgi?id=1032695
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The kernel will not be changed to support this, so drop the code. Listening
for all RTM_NEWLINK messages and filtering on name is reliable, so it is not
a problem.
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Compute the 'secs' field as seconds since start of lease acquisition
procedure. Start off with a value of zero and increase it only for
each resent DHCP discover message. See the discussion before and
after http://www.ietf.org/mail-archive/web/dhcwg/current/msg05836.html
and Section 3.1 of RFC 2131.
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Go back to Init state independent of the current state the client
is in.
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A checksum field with value zero means no UDP checksum has been
computed for the packet.
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In trying to track down a stupid linker bug, I noticed a bunch of
memset() calls that should be using memzero() to make it more "obvious"
that the options are correct (i.e. 0 is not the length, but the data to
set). So fix up all current calls to memset(foo, 0, length) to
memzero(foo, length).
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It would crash and the legend in the bottom followed the time 0.0.
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Missed in 5c795114.
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