If we assign our own test runner, passing arguments stops working
as unittest won't instantiate its own test runner after it parses
the arguments from sys.argv.
Consequence is that the tests will write to stderr now instead of
stdout since it doesn't seem possible to configure the stream that
unittest.main() will instantiate its test runner with so it'll
default to sys.stderr.
Add the "Isolated" parameter in the *.network file, e.g.,
[Bridge]
Isolated=true|false
When the Isolated parameter is true, traffic coming out of this port
will only be forward to other ports whose Isolated parameter is false.
When Isolated is not specified, the port uses the kernel default
setting (false).
The "Isolated" parameter was introduced in Linux 4.19.
See man bridge(8) for more details.
But even though the kernel and bridge/iproute2 recognize the "Isolated"
parameter, systemd-networkd did not have a way to set it.
The warning is correct, since we don't inherit the necessary
unittest.TestCase class, but that's on purpose, since the Utilities
class is not supposed to be instantiated on its own, but should
complement other classes' definitions which do inherit from the
unittest.TestCase class.
It currently works because `\(` and `\)` are not valid escape sequences,
so they're not treated differently. Using raw strings (or double
backslashes) is a more correct solution.
Multiline comments are converted to docstrings only when they're the
first statement in a function/method. Even though they're still a no-op
otherwise, let's use "true" comments to make pylint happy.
If wait_operstate() is called super quickly after ip command, then the
up/down state may not be changed and propagated to networkd, and
wait_operstate() mistakenly pass with the previous state.
To avoid such situation, wait for a while to make networkd actually
detect the interface brought up/down.
This fixes the following race:
1. when a dummy interface is created, it is initially down state,
2. hence, wait_operstate() may pass before the link is activated,
3. and the ip command bring up the interface before the activation,
4. and networkd activates, that is, brings down the interface,
5. thus, next wait_operstate() timedout, as it waits for the interface up.
To fix the race, let's wait the link is activated, before enter the loop
of wait_operstate().
Fixes#22267.
Strictly speaking, this breaks the backward compatibility, but I guess
in most cases people already sets Scope=link for such routes.
This behavior matches with how 'ip route' command adds such route by
default.
Prompted by https://twitter.com/jplitza/status/1480500562391179270.
People often assigns the MAC address of the enslaved interface to e.g.
bridge interface. So, the local assignment bit should not be adjusted.
Fixes#21649.
