scsi: add some helper scripts for testing

This provides some tooling for running blktests. The README.md contains
documentation about the architecture.

I am seeing some race-conditions that sometimes lead to boot
freezes [1], so this is not really ready for automatic evaluation during
a CI pipeline.

[1] https://linaro.atlassian.net/browse/ORKO-37

Signed-off-by: Erik Schilling <erik.schilling@linaro.org>
Link: https://linaro.atlassian.net/browse/ORKO-17

crates/scsi/test/.containerignore

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+results/
+test-data/

crates/scsi/test/.gitignore

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+results/
+test-data/

crates/scsi/test/Containerfile

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+FROM fedora:39
+RUN dnf install --quiet --assumeyes \
+  /usr/bin/qemu-system-x86_64 \
+  /usr/bin/qemu-img \
+  /usr/bin/virt-sysprep \
+  /usr/bin/ssh-keygen \
+  /usr/bin/ssh \
+  /usr/sbin/libvirtd \
+  wget \
+  && dnf clean all
+VOLUME /tests/

crates/scsi/test/README.md

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+# Testing tools
+
+This folder contains some tooling for tests
+
+## Prerequisites
+
+For running these tests, you need a KVM enabled x86_64 machine and `podman`.
+
+vhost-user-scsi must have been built already.
+
+## Performed tests
+
+Right now, the test harness will only run
+[blktests](https://github.com/osandov/blktests) against the target device
+(these tests are probably testing the guest kernel more than the actual
+device).
+
+## Test execution
+
+Triggering the build of the necessary container images and invoking the tests
+is done by calling `./invoke-test.sh`.
+
+That will build the `Containerfile`, launch a container and invoke
+`./start-test.sh` inside of the container. That will download a Fedora cloud
+image, launch the daemon, launch QEMU, waits until it is up and triggers the
+test execution.
+
+Results will be downloaded into a timestamped folder under `results/`.

crates/scsi/test/invoke-test.sh

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+#!/bin/bash -xe
+
+cd $(dirname "$0")
+
+DAEMON_BINARY="$PWD/../../../target/debug/vhost-device-scsi"
+
+if [[ ! -e "$DAEMON_BINARY" ]]
+then
+  echo "Unable to find \"$DAEMON_BINARY\". Did you run cargo build?"
+  exit 1
+fi
+
+TAG_NAME=vhost-device-scsi-test-env
+podman build -t "$TAG_NAME" .
+podman run \
+  -v /dev/kvm:/dev/kvm \
+  --security-opt label=disable  \
+  -v "$DAEMON_BINARY":/usr/local/bin/vhost-device-scsi:ro \
+  -v $PWD:/test "$TAG_NAME" \
+  /test/start-test.sh

crates/scsi/test/start-test.sh

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+#!/bin/bash -xe
+
+cd $(dirname "$0")
+
+libvirtd --daemon
+virtlogd --daemon
+export LIBGUESTFS_BACKEND=direct
+
+mkdir -p test-data/
+pushd test-data
+  IMAGE=Fedora-Cloud-Base-38-1.6.x86_64.qcow2
+  test -e "$IMAGE" || wget --quiet "https://download.fedoraproject.org/pub/fedora/linux/releases/38/Cloud/x86_64/images/$IMAGE" -O "$IMAGE"
+  qemu-img create -f qcow2 -F qcow2 -b "$PWD/$IMAGE" fedora-overlay.qcow2
+
+  test -e test-key-id_rsa || ssh-keygen -N "" -f test-key-id_rsa
+
+  virt-sysprep -a fedora-overlay.qcow2 \
+    --ssh-inject root:file:test-key-id_rsa.pub
+
+  fallocate -l 5GiB big-image.img
+popd
+
+SSH_OPTS="-i test-data/test-key-id_rsa -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o User=root -o Port=2222"
+
+vhost-device-scsi --socket-path /tmp/vhost-user-scsi.sock test-data/big-image.img &
+
+sleep 1
+
+qemu-system-x86_64 \
+  -enable-kvm -cpu host \
+  -device virtio-net-pci,netdev=net0,mac=52:54:00:12:35:02\
+  -netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::2323-:23 \
+  -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 \
+  -hda test-data/fedora-overlay.qcow2 \
+  -object memory-backend-memfd,id=mem,size=8192M,share=on \
+  -numa node,memdev=mem \
+  -device vhost-user-scsi-pci,num_queues=1,param_change=off,chardev=vus \
+  -chardev socket,id=vus,path=/tmp/vhost-user-scsi.sock \
+  -smp 4 -m 8192 \
+  -serial mon:stdio \
+  -display none &
+
+
+while ! ssh $SSH_OPTS localhost echo waiting for guest to come online
+do
+  sleep 1
+done
+
+
+scp $SSH_OPTS test-script.sh localhost:~/
+ssh $SSH_OPTS localhost /root/test-script.sh || echo "tests failed"
+
+export RESULT_DIR="$PWD/results/$(date --rfc-3339=s)"
+mkdir -p "$RESULT_DIR"
+
+scp $SSH_OPTS -r localhost:/root/blktests/results/ "$RESULT_DIR/"
+ssh $SSH_OPTS localhost poweroff
+
+wait # wait for qemu to terminate
+

crates/scsi/test/test-script.sh

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+#!/bin/bash -xe
+
+dnf install -y git make g++ fio liburing-devel blktrace
+
+git clone https://github.com/osandov/blktests.git
+pushd blktests
+  echo "TEST_DEVS=(/dev/sdb)" > config
+	make -j $(nproc)
+	./check scsi block
+popd