selftests: hsr: Extend the testsuite to also cover HSRv1.

The testsuite already has simply tests for HSRv0. The testuite would
have been able to notice the v1 breakage if it was there at the time.

Extend the testsuite to also cover HSRv1.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

selftests: hsr: Reorder the testsuite.

Move the code and group into functions so it will be easier to extend
the test to HSRv1 so that both versions are covered.

Move the ping/test part into do_complete_ping_test() and the interface
setup into setup_hsr_interfaces().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

selftests: hsr: Use `let' properly.

The timeout in the while loop is never subtracted due wrong usage of
`let' leading to an endless loop if the former condition never gets
true.

Put the statement for let in quotes so it is parsed as a single
statement.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

selftests: Add a basic HSR test.

This test adds a basic HSRv0 network with 3 nodes. In its current shape
it sends and forwards packets, announcements and so merges nodes based
on MAC A/B information.
It is able to detect duplicate packets and packetloss should any occur.

Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>