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test/pasta_options/log_to_file checks that pasta truncates its log file
when started. It does that by starting pasta with a log file once, then
starting it again and checking that after the second round, the log file
has only one line: the startup banner from the second invocation.
However, this test will break if the second invocation logs any additional
messages at startup. This can easily happen on a host with multiple
network interfaces due to the "Multiple default route" informational
messages added in 639fdf06e ("netlink: Fix selection of template
interface"). I believe it could also happen on a host without IPv6
connectivity due to the "Couldn't pick external interface" messages, though
I haven't confirmed this.
Make the log file test more robust, by not testing for a single line, but
instead explicitly testing for the PID of the second pasta invocation in
the banner line.
Link: https://bugs.passt.top/show_bug.cgi?id=88
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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test/pasta_options/log_to_file contains a couple of rudimentary tests
where we start pasta with an interactive shell, then immediately exit it.
We can achieve the same thing by using /bin/true as the command to pasta.
This also means that waiting for pasta to start, waiting for the executed
command to complete and for pasta to clean up are all handled by simply
waiting for pasta to complete in the foreground, so there's no need for an
additional sleep.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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In practical terms, passt doesn't benefit from the additional
protection offered by the AGPL over the GPL, because it's not
suitable to be executed over a computer network.
Further, restricting the distribution under the version 3 of the GPL
wouldn't provide any practical advantage either, as long as the passt
codebase is concerned, and might cause unnecessary compatibility
dilemmas.
Change licensing terms to the GNU General Public License Version 2,
or any later version, with written permission from all current and
past contributors, namely: myself, David Gibson, Laine Stump, Andrea
Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian
Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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On shell 'exit' commands, running shells from pasta, we might get:
Cannot set tty process group (No such process)
as some TTY devices might be unaccessible. This is harmless, but
after commit "pasta: propagate exit code from child command", we'll
get test failures there, at least with dash.
Ignore those explicitly with a ugly workaround: we can't simply do
something like:
exit || :
because the failure is reported by the shell itself once it exits,
regardless of the command evaluation.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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To test log files on a tmpfs mount, we need to unshare the mount
namespace, which means using a context for the passt pane is not
really practical at the moment, as we can't open a shell there, so
we would have to encapsulate all the commands under 'unshare -rUm',
plus the "inner" pasta command, running in turn a tcp_rr server.
It might be worth fixing this by e.g. detecting we are trying to
spawn an interactive shell and adding a special path in the context
setup with some form of stdin redirection -- I'm not sure it's doable
though.
For this reason, add a new layout, using a context only for the host
pane, while keeping the old command dispatch mechanism for the passt
pane.
We also need a new setup function that doesn't start pasta: we want
to start and restart it with different options.
Further, we need a 'pint' directive, to send an interrupt to the
passt pane: add that in lib/test.
All the tests before the one involving tmpfs and a detached mount
namespace were also tested with the context mechanism. To make an
eventual conversion easier, pass tcp_crr directly as a command on
pasta's command line where feasible.
While at it, fix the comment to the teardown_pasta() function.
The new test set can be semi-conveniently run as:
./run pasta_options/log_to_file
and it checks basic log creation, size of the log file after flooding
it with debug entries, rotations, and basic consistency after
rotations, on both an existing filesystem and a tmpfs, chosen as
it doesn't support collapsing data ranges via fallocate(), hence
triggering the fall-back mechanism for logging rotation.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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