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We use stream objects in four different cases: let's track them.
This in particular allows us to make sure the limit on outgoing streams
cannot be exhausted by having incoming streams as this means we can
neatly separate the counters for all four types.
Fixes: #11422
Oneshots going to inactive directly without ever entering UNIT_ACTIVE is
considered success. This however means that if something both Requires=
and Requisites= a unit of such nature, the verify-active job getting
merged into the start job makes it lose this property of failing the
depending jobs, as there, the start job has the result JOB_DONE on
success, so we never walk over RequisiteOf units.
This change makes sure that such units always go down. It is also only
meaningful with After=, but so is Requisite= itself. Also, we also catch
cases like a oneshot having RemainAfterExit= true making us start up
properly in such a setting, but then removing it, reloading the unit,
and restarting it. In such a case, we go down due to restart propagation
before them, and our start job waits on theirs, properly failing with
the JOB_DEPENDENCY result.
This covers cases where ConditionXYZ= creates a similar situation as
well.
According to the specification[1] the 'capabilities' describe the physical
device as a whole and the 'device_caps' describe the current device node.
The existence of 'device_caps' is indicated by the V4L2_CAP_DEVICE_CAPS
capability flag.
Use the 'device_caps' if available to generate the correct
ID_V4L_CAPABILITIES for the current device node.
This is relevant for UVC devices with current kernels: Two /dev/videoX
devices exist for those. One for video and one for metadata. The
V4L2_CAP_VIDEO_CAPTURE flag is present in the 'capabilities' for both
device nodes but only in the 'device_caps' of the video device node.
Without this, the ID_V4L_CAPABILITIES of the metadata device node
incorrectly contains 'capture'.
[1] https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querycap.html
The "chaddr" field is 16 bytes long, with "hlen" being the
length of the address.
https://tools.ietf.org/html/rfc2131#section-4.3.1 says:
The server MUST return to the client:
...
o Any parameters specific to this client (as identified by
the contents of 'chaddr' or 'client identifier' in the DHCPDISCOVER
or DHCPREQUEST message), e.g., as configured by the network
administrator,
It's not clear, whether only the first 'hlen' bytes of 'chaddr'
must correspond or all 16 bytes.
Note that https://tools.ietf.org/html/rfc4390#section-2.1 says for IPoIB
"chaddr" (client hardware address) field MUST be zeroed.
with having "hlen" zero. This indicates that at least in this case, the
bytes after "hlen" would matter.
As the DHCP client always sets the trailing bytes to zero, we would expect
that the server also replies as such and we could just compare all 16 bytes.
However, let's be liberal and accept any padding here.
This in practice only changes behavior for infiniband, where we
previously would enforce that the first ETH_ALEN bytes are zero.
That seems arbitrary for IPoIB. We should either check all bytes or
none of them. Let's do the latter and don't enforce RFC 4390 in this
regard.
Cloudflare public DNS service is currently the fastest one according to
https://www.dnsperf.com/#!dns-resolvers. Why not improve the experience for
systemd users using this as a default fallback nameserver?
This new setting allows configuration of CFS period on the CPU cgroup, instead
of using a hardcoded default of 100ms.
Tested:
- Legacy cgroup + Unified cgroup
- systemctl set-property
- systemctl show
- Confirmed that the cgroup settings (such as cpu.cfs_period_ns) were set
appropriately, including updating the CPU quota (cpu.cfs_quota_ns) when
CPUQuotaPeriodSec= is updated.
- Checked that clamping works properly when either period or (quota * period)
are below the resolution of 1ms, or if period is above the max of 1s.
This works like parse_sec() but defaults to USEC_INFINITY when passed an
empty string or only whitespace.
Also introduce config_parse_sec_def_infinity, which can be used to parse
config options using this function.
This is useful for time options that use "infinity" for default and that
can be reset by unsetting them.
Introduce a test case to ensure it works as expected.
As device units will be reloaded by systemd whenever the corresponding device generates a "changed" event, if the mount unit / cryptsetup service is wanted by its device unit, the former can be restarted by systemd unexpectedly after the user stopped them explicitly. It is not sensible at all and can be considered dangerous. Neither is the behaviour conventional (as `auto` in fstab should only affect behaviour on boot and `mount -a`) or ever documented at all (not even in systemd, see systemd.mount(5) and crypttab(5)).
dbus-daemon might have a slightly different idea of what a valid msg is
than us (for example regarding valid msg and field sizes). Let's hence
try to proceed if we can and thus drop messages rather than fail the
connection if we fail to validate a message.
Hopefully the differences in what is considered valid are not visible
for real-life usecases, but are specific to exploit attempts only.
