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The kernel resets the ipv6 mtu after NETDEV_UP or NETDEV_CHANGEMTU event,
so we must reset the ipv6 mtu to our configured value after we detect
IFF_UP flag set or after we set the device mtu.
Fixes: #13914.
This switches detect_container() to path_is_read_only_rw("/sys"), as if
systemd-udevd.service is conditionalized with that way.
This also updates the log message.
If /sys is read only filesystem, e.g., nspawn is running in container,
then usually udev is not running. In such a case, let's assume that
the interface is already initialized. Also, this makes nspawn refuse
to use the network interface which is under renaming.
Fixes#14223.
Properties marked this way really shouldn't be sent around willy-nilly,
that's what the flag is about, hence exclude it from InterfacesAdded
signals (and in fact anything that is a signal).
This allows marking messages that contain "sensitive" data with a flag.
If it's set then the messages are erased from memory when the message is
freed.
Similar, a flag may be set on vtable entries: incoming/outgoing message
matching the entry will then automatically be flagged this way.
This is supposed to be an easy method to mark messages containing
potentially sensitive data (such as passwords) for proper destruction.
(Note that this of course is only is as safe as the broker in between is
doing something similar. But let's at least not be the ones at fault
here.)
Stochastic Fairness Queueing is a classless queueing discipline.
SFQ does not shape traffic but only schedules the transmission of packets, based on 'flows'.
The goal is to ensure fairness so that each flow is able to send data in turn,
thus preventing any single flow from drowning out the rest.
So far we silently convert negative return values from run() as
EXIT_FAILURE, which is how UNIX expects it. In many cases it would be
very useful for the caller to retrieve the actual error number we exit
with. Let's generically return that via sd_notify()'s ERRNO= attribute.
This means callers can set $NOTIFY_SOCKET and get the actual error
number delivered at their doorstep just like that.
This adds a new safe_fork() flag. If set the child process' fd 1 becomes
fd 2 of the caller. This is useful for invoking tools (such as various
mkfs/fsck implementations) that output status messages to stdout, but
which we invoke and don't want to pollute stdout with their output.
The actual burst limit is modified by the remaining disk space. This
isn't mentioned anywhere in the available documentation and might be a
source of surprise for an end user expecting certain behaviors.
If there is no boot menu timeout, pressing a key during boot should get
the boot menu displayed. However, on some systems the keyboard is not
initialized right away, which causes the menu to be inaccessible if no
timeout is specified.
To resolve this, if the error is "not ready" after the initial attempt of
detection, wait for 0.1 second and retry. This solves the problem
described above on all the tested systems.
The reason for just a single retry, and not retrying while "not ready",
is that some firmwares continue to return the "not ready" error on
every probe attempt if no key is pressed.
Signed-off-by: Leonid Bloch <lb.workbox@gmail.com>
We don't, the signal remains blocked. We use signalfd() to be able to
read the signal events without unblocking the signal.
While we are at it, mention that pthread_sigmask() is fine too.
We already refuse sd_event_add_signal() if the specified signal is not
blocked, let's do this also for sd_event_add_child(), since we might
need signalfd() to implement this, and this means the signal needs to be
blocked.
