vhost: Fix-up failing tests and add a little more coverage

This fakes out the underlying Net implementation with FakeNet to try
and get some of the code a little further along before it
explodes. Then, we test for known failures when running without a real
vhost file descriptors.

This allows us to pass without running as root as we would expect
running on Paladins.

This is also the final module that was failing at ToT.

Also adds vhost to the build_test test targets.

BUG=none
TEST=Run unit tests:
cargo test -p crosvm -p data_model -p syscall_defines -p kernel_loader -p net_util -p x86_64 -p virtio_sys -p kvm_sys -p vhost -p io_jail -p net_sys -p sys_util -p kvm
Also ran ./build_test

Change-Id: Ie12d05c044634a660a234483532cf783e2a7fe84
Reviewed-on: https://chromium-review.googlesource.com/656278
Commit-Ready: Jason Clinton <jclinton@chromium.org>
Tested-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: Jason Clinton <jclinton@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/build_test.py b/build_test.py
index e500a9a..3a40b01 100755
--- a/build_test.py
+++ b/build_test.py
@@ -48,6 +48,7 @@ TEST_MODULES_PARALLEL = [
     'net_sys',
     'net_util',
     'syscall_defines',
+    'vhost',
     'virtio_sys',
     'x86_64',
 ]