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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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This loop goes through and gives a numeric label to each pane, even though
we name the panes properly shortly thereafter. Looks like a leftover from
some earlier version. Remove it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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We use this fifo to send messages to the information pane. Put it in the
state directory so it doesn't need its own cleanup.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Put the pieces together to use the new style context based dispatch for
the passt_in_pasta tests.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Now that we have all the pieces we need for issuing commands both into
namespaces and into guests, we can use those to convert the two_guests to
using only the new style context command issue.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Extends the context system in the test scripts to allow executing commands
within a guest. Do this without requiring an existing network in the guest
by using socat to run ssh via a vsock connection.
We do need some additional "sleep"s in the tests, because the new
faster dispatch means that sometimes we attempt to connect before
socat has managed to listen.
For now, only use this for the plain "passt" tests. The "passt_in_ns" and
other tests have additional complications we still need to deal with.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Extend the context system to allow commands to be run in a namespace
created with unshare, and use it for the namespace used in the pasta tests.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Convert the pasta and passt tests to use new-style context execution
for the things that run in the "passt" frame. Don't touch the
passt_in_ns or two_guests tests yet, because they run passt inside a
namespace which introduces some additional complications we have yet
to handle.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Convert most of the tests to use the new-style system for issuing commands
for all host commands. We leave the distro tests for now: they use
the same pane for both host and guest commands which we'll need some more
things to deal with.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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...showing setup steps, some peculiarities as --net option, and a
general side-to-side comparison with slirp4netns(1), including
"quick" TCP and UDP throughput and latency benchmarks.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Not really quick, definitely dirty.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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