This extends the logic by which we look for drop-ins for unit files when
loading them. Previously for a unit "foo-quux-bar.service" we'd look in
a directory "foo-quux-bar.service.d" accompanying it for extension
dropins. With this change we'll additionally look in:
"foo-quux-.service.d" and "foo-.service.d", i.e. we'll truncate the unit
name after every dash.
This is an alternative to templating for many services, as it permits
configuring defaults for sets of units that all use the same prefix in
the unit name. This is particularly useful in slice, mount and
automount units which reflect a hierarchy of concepts, as it permits
setting defaults for specific subsets of the tree. For example, in order
to provide every user with a memory of 1G it's now possible to do:
# mkdir -p /etc/systemd/system/user-.slice.d
# cat > /etc/systemd/system/user-.slice.d/50-memory.conf << EOF
[Slice]
MemoryMax=1G
EOF
# systemctl daemon-reload
This makes use of the fact that every user gets his own slice unit when
logging in, named "user-$UID.slice".
This doesn't precisely provide what is requested in #2556, but it does
provide equivalent functionality.
Fixes: #2556
See: #3504#7599
If a tool only invokes copy_bytes() a single time the _unlikely_() will always be
wrong, and is hence not useful. Let's drop it and let the compiler
figure our what to do, instead of misleading it.
Also, some coding style imprvoements.
splice() ignores O_NONBLOCK on pipes but not on other fds. Let's handle
that properly, and query O_ONBLOCK manually in that case, ensuring
systematic behaviour in either case.
Optionally, when we copy between fds with simple read/write, let's
return any remaining data we already read into the buffer if write
fails. This is useful to allow callers to use the read data otherwise,
perhaps implementing a different fallback for copying.
ISO-C doesn't allow empty initializers, so replace it by explicitly
initializing to zero.
Also add braces because x is a union and we initialize a subobject, so
a compiler might warn about suggesting braces. Shut that up.
It does two things:
1. It derives the element size from the array argument type
2. It derives the right type for the function from the array argument
type
Using this macro call should make the invocations of qsort() quite a bit
safer.
$ sudo swapoff -av
swapoff /dev/vda4
$ sudo systemctl hibernate
Failed to hibernate system via logind: Not enough swap space for hibernation
Fixes#6729.
If hibernate.target is masked, and systemctl hibernate is invoked, havoc ensues.
logind starts the hibernation operation, but then doesn't go through with it;
gnome-shell segfaults. Let's be nice to the user and refuse doing anything in
that case.
$ sudo systemctl mask hibernate.target
$ busctl call org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager CanHibernate
s "no"
$ sudo systemctl hibernate
Failed to hibernate system via logind: Access denied
Failed to start hibernate.target: Unit hibernate.target is masked.
https://bugzilla.redhat.com/show_bug.cgi?id=1468003#c4
can_sleep() returns 0 if the operation is impossible, but
the code assumed that negative is returned in that case,
in effect reporting s2h was possible even if hibernation or
suspend were not possible.
Incorrect range and resolution for the touchpad at a Toshiba Satellite R830 reported by kernel. After running
$ sudo touchpad-edge-detector 85x50 /dev/input/event4
the new axis overrides are as follows
#Toshiba Satellite R830
evdev:name:SynPS/2 Synaptics TouchPad:dmi:svnTOSHIBA:pnSATELLITER830
EVDEV_ABS_00=1238:5785:53
EVDEV_ABS_01=1045:4826:76
EVDEV_ABS_35=1238:5785:53
EVDEV_ABS_36=1045:4826:76
Those overrides have been tested to work.
This addresses missing feature on #8677
Devices in Hyper-V/Azure exist on vmbus and are identified by
UUID value. This patch adds a hardware table so that udevadm
can report properties. I chose names are based on the values
reported in Window Device Manager (for consistency).
The table includes several devices that are not used by Linux
but are present and ignored.
For example:
$ udevadm info -q property /sys/bus/vmbus/devices/58f75a6d-d949-4320-99e1-a2a2576d581c
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0004:00/VMBUS:00/58f75a6d-d949-4320-99e1-a2a2576d581c
DRIVER=hid_hyperv
ID_MODEL_FROM_DATABASE=Microsoft Hyper-V Mouse
MODALIAS=vmbus:9eb6a8cf4a5bc04cb98b8ba1a1f3f95a
SUBSYSTEM=vmbus
USEC_INITIALIZED=11076966
Or with updated kernel the driverctl script.
$ driverctl -b vmbus -v list-devices
1eccfd72-4b41-45ef-b73a-4a6e44c12924 hv_balloon (Microsoft Hyper-V Dynamic Memory)
242ff919-07db-4180-9c2e-b86cb68c8c55 hv_util (Microsoft Hyper-V Data Exchange)
2450ee40-33bf-4fbd-892e-9fb06e9214cf hv_util (Microsoft Hyper-V Backup/Restore)
2dd1ce17-079e-403c-b352-a1921ee207ee hv_util (Microsoft Hyper-V Time Sync)
4487b255-b88c-403f-bb51-d1f69cf17f87 (none) (Microsoft Hyper-V Virtual Machine Activation)
53557f8e-057d-425b-9265-01c0fd7e273e hv_netvsc (Microsoft Hyper-V Network Adapter)
5620e0c7-8062-4dce-aeb7-520c7ef76171 hyperv_fb (Microsoft Hyper-V Video)
58f75a6d-d949-4320-99e1-a2a2576d581c hid_hyperv (Microsoft Hyper-V Mouse)
849a776e-8120-4e4a-9a36-7e3d95ac75b3 hv_netvsc (Microsoft Hyper-V Network Adapter)
99221fa0-24ad-11e2-be98-001aa01bbf6e (none) (Microsoft Hyper-V Remote Desktop Control)
b2f44faf-2a29-42ba-91b2-f13fd30a2d4b hv_storvsc (Microsoft Hyper-V SCSI Controller)
b6650ff7-33bc-4840-8048-e0676786f393 hv_util (Microsoft Hyper-V Guest Shutdown)
d34b2567-b9b6-42b9-8778-0a4ec0b955bf hyperv_keyboard (Microsoft Hyper-V Keyboard)
f5bee29c-1741-4aad-a4c2-8fdedb46dcc2 (none) (Microsoft Hyper-V Remote Desktop Virtualization)
fd149e91-82e0-4a7d-afa6-2a4166cbd7c0 hv_util (Microsoft Hyper-V Heartbeat)
The Linux kernel is adding support for configuring the offset
into a disk. This allows swapfiles to be more usable as users
will no longer need to set the offset on their kernel command
line.
Use this API in systemd when hibernating as well.
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
$ build/systemd-analyze time
Bootup is not yet finished (org.freedesktop.systemd1.Manager.FinishTimestampMonotonic=0).
Please try again later.
Hint: Use 'systemctl list-jobs' to see active jobs
The plot command requires a full d-bus bus to fetch the host
information, which seems rather optional, and having a running dbus
daemon is not always desirable. So instead, we try to acquire a full
bus, and if that fails we acquire the systemd bus, in which case we
omit the host information from the output.
We refactor acquire_bus() into two new functions which in addition
makes the call sites clearer.
Udev workers consume typically 50-100MiB virtual memory.
On systems with lots of CPUs and relatively low memory, that may
easily cause workers to be OOM-killed.
This patch limits the number of workers to 8 per GiB memory.
But don't let the limit drop below the smallest value we had
without this patch (8 + 1 * 2 = 10); on small systems, udev's
memory footprint is likely lower.
