Quoting from Jon Corbet's report of Stephen Hemminger's talk at Linux
Plumbers Conference 2014 (https://lwn.net/Articles/616241/):
[...] So Stephen encouraged everybody to run a command like:
sysctl -w net.core.default_qdisc=fq_codel
That will cause fq_codel to be used for all future connections
[Qdiscs apply to interfaces, not connections. Pointed out by TomH
in the article comments. -- mschmidt] (up to the next reboot).
Unfortunately, the default queuing discipline cannot be changed,
since it will certainly disturb some user's workload somewhere.
Let's have the recommended default in systemd.
Thanks to Dave Täht for advice and the summary at
https://lists.bufferbloat.net/pipermail/cerowrt-devel/2014-October/003701.html
kdbus.h now has KDBUS_ATTACH_COMM split into KDBUS_ATTACH_TID_COMM and
KDBUS_ATTACH_PID_COMM. The items were split already, so the change in
systemd is easy.
In kdbus.h, the 'features' field has been dropped again. Instead of
negotiating features that way, we decided to make the kernel return the
set of supported flags in each ioctl struct's .flags field, in both the
success and error cases.
Without the socket open we are going to crash and burn. If for
whatever reason we fail during deserialization we will fail when
trying to open the socket. In this case it is better to unlink the old
socket and maybe lose some messages, than to continue without the
notification socket.
Of course this situation should not happen, but we should handle
it as gracefully as possible anyway.
https://bugzilla.redhat.com/show_bug.cgi?id=1099299
Commit 864e17068 ("nspawn: actually allow access to /dev/net/tun in the
container") added "/dev/net/tun" to the list of allowed devices but forgot
to tweak the array length, which caused "/dev/kdbus/*" to be missed.
If we don't have privileges to setup the namespaces then we are most likely
running inside some sort of unprivileged container, hence not being able to
create namespace is not a problem because spawned service can't access host
system anyway.
Before returning from function we should reset ret to NULL, thus cleanup
function is nop.
Also context_str() returns pointer to a string containing context but not a
copy, hence we must make copy it explicitly.
Templates can be [re]enabled, on their own if the have DefaultInstance set,
and with an instance suffix in all cases. Propose just the template name
ending in @, to underline the instance suffix may have to be appended.
Likewise for start/restart.
This means that sometimes superflous units that one will not really
want to operate on will be proposed, but this seems better than
proposing a very incomplete set of names.
https://bugs.freedesktop.org/show_bug.cgi?id=66912
'GetConnectionUnixProcessID', 'GetConnectionUnixUser' and
'GetConnectionSELinuxSecurityContext' methods should return
'NameHasNoOwner' error (if chosen name is not available on bus)
with more detailed description - like dbus-1:
Could not get PID of name 'org.freedesktop.test': no such name.
Could not get UID of name 'org.freedesktop.test': no such name.
Could not get security context of name 'org.freedesktop.test': no such name.
Otherwise we have only laconic message without proper dbus error:
Error System.Error.ENXIO: No such device or address
Under an SELinux system, we want the file that is created to
have a proper context, different from the default for files in /run.
This is so that the policy can give access to almost everyone to
this file.
After all, we set AllowIsolate exclusively for target units so far, and
this is more or less the only thing tht makes sense, hence also use
".target" as completion suffix by default.
I think it is more readable and nicer if everything is in
one table.
Also, describe what the return value, since it seems awkward to
describe the change in behaviour with --quiet before describing
what the default is.
FAIL: test-engine
=================
Cannot find cgroup mount point: No such file or directory
Assertion 'r >= 0' failed at ../src/test/test-engine.c:46, function main(). Aborting.
FAIL: test-sched-prio
=====================
Cannot find cgroup mount point: No such file or directory
Assertion 'r >= 0' failed at ../src/test/test-sched-prio.c:42, function main(). Aborting.
FAIL: test-bus-cleanup
======================
Assertion 'sd_bus_open_system(&bus) >= 0' failed at ../src/libsystemd/sd-bus/test-bus-cleanup.c:40, function test_bus_open(). Aborting.
after new: refcount 1
