scripts: Improve AArch64 CI for parallel executors

Lock "work_loads" folder when one job is syncing files. If another job
arrives, wait until the lock is released.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>

scripts/run_integration_tests_aarch64.sh

@@ -6,11 +6,14 @@ source $HOME/.cargo/env
 export BUILD_TARGET=${BUILD_TARGET-aarch64-unknown-linux-gnu}
 
 WORKLOADS_DIR="$HOME/workloads"
+WORKLOADS_LOCK="$WORKLOADS_DIR/integration_test.lock"
+
 mkdir -p "$WORKLOADS_DIR"
 
+update_workloads() {
     cp scripts/sha1sums-aarch64 $WORKLOADS_DIR
 
-BIONIC_OS_IMAGE_DOWNLOAD_NAME="bionic-server-cloudimg-arm64.img" \
+    BIONIC_OS_IMAGE_DOWNLOAD_NAME="bionic-server-cloudimg-arm64.img"
     BIONIC_OS_IMAGE_DOWNLOAD_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$BIONIC_OS_IMAGE_DOWNLOAD_NAME"
     BIONIC_OS_DOWNLOAD_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_IMAGE_DOWNLOAD_NAME"
     if [ ! -f "$BIONIC_OS_DOWNLOAD_IMAGE" ]; then
@@ -19,7 +22,7 @@ if [ ! -f "$BIONIC_OS_DOWNLOAD_IMAGE" ]; then
         popd
     fi
 
-BIONIC_OS_RAW_IMAGE_NAME="bionic-server-cloudimg-arm64.raw" \
+    BIONIC_OS_RAW_IMAGE_NAME="bionic-server-cloudimg-arm64.raw"
     BIONIC_OS_RAW_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_RAW_IMAGE_NAME"
     if [ ! -f "$BIONIC_OS_RAW_IMAGE" ]; then
         pushd $WORKLOADS_DIR
@@ -29,7 +32,7 @@ fi
 
     # Convert the raw image to qcow2 image to remove compressed blocks from the disk. Therefore letting the
     # qcow2 format image can be directly used in the integration test.
-BIONIC_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="bionic-server-cloudimg-arm64.qcow2" \
+    BIONIC_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="bionic-server-cloudimg-arm64.qcow2"
     BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
     if [ ! -f "$BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
         pushd $WORKLOADS_DIR
@@ -37,7 +40,7 @@ if [ ! -f "$BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
         popd
     fi
 
-FOCAL_OS_IMAGE_DOWNLOAD_NAME="focal-server-cloudimg-arm64.img" \
+    FOCAL_OS_IMAGE_DOWNLOAD_NAME="focal-server-cloudimg-arm64.img"
     FOCAL_OS_IMAGE_DOWNLOAD_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$FOCAL_OS_IMAGE_DOWNLOAD_NAME"
     FOCAL_OS_DOWNLOAD_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_IMAGE_DOWNLOAD_NAME"
     if [ ! -f "$FOCAL_OS_DOWNLOAD_IMAGE" ]; then
@@ -46,7 +49,7 @@ if [ ! -f "$FOCAL_OS_DOWNLOAD_IMAGE" ]; then
         popd
     fi
 
-FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-arm64.raw" \
+    FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-arm64.raw"
     FOCAL_OS_RAW_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_NAME"
     if [ ! -f "$FOCAL_OS_RAW_IMAGE" ]; then
         pushd $WORKLOADS_DIR
@@ -56,7 +59,7 @@ fi
 
     # Convert the raw image to qcow2 image to remove compressed blocks from the disk. Therefore letting the
     # qcow2 format image can be directly used in the integration test.
-FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="focal-server-cloudimg-arm64.qcow2" \
+    FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="focal-server-cloudimg-arm64.qcow2"
     FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
     if [ ! -f "$FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
         pushd $WORKLOADS_DIR
@@ -100,7 +103,6 @@ popd
 
     # Build custom kernel based on virtio-pmem and virtio-fs upstream patches
     PE_IMAGE="$WORKLOADS_DIR/Image"
-
     LINUX_CUSTOM_DIR="$WORKLOADS_DIR/linux-custom"
 
     build_custom_linux_kernel() {
@@ -114,7 +116,6 @@ if [ ! -d "$LINUX_CUSTOM_DIR" ]; then
         pushd $WORKLOADS_DIR
         time git clone --depth 1 "https://github.com/cloud-hypervisor/linux.git" -b "virtio-fs-virtio-iommu-virtio-mem-5.6-rc4" $LINUX_CUSTOM_DIR
         popd
-
     else
         pushd $LINUX_CUSTOM_DIR
         git fetch
@@ -162,6 +163,18 @@ if [ ! -d "$SHARED_DIR" ]; then
         echo "foo" > "$SHARED_DIR/file1"
         echo "bar" > "$SHARED_DIR/file3" || exit 1
     fi
+}
+
+# lock the workloads folder to avoid parallel updating by different containers
+(
+    echo "try to lock $WORKLOADS_DIR folder and update"
+    flock -x 12 && update_workloads
+) 12>$WORKLOADS_LOCK
+
+# Create tap interface without multipe queues support for vhost_user_net test.
+sudo ip tuntap add name vunet-tap0 mode tap
+# Create tap interface with multipe queues support for vhost_user_net test.
+sudo ip tuntap add name vunet-tap1 mode tap multi_queue
 
 BUILD_TARGET="aarch64-unknown-linux-${CH_LIBC}"
 CFLAGS=""
@@ -176,7 +189,7 @@ sed -i 's/"with-serde",\ //g' hypervisor/Cargo.toml
 cargo_args=("$@")
 cargo_args+=("--no-default-features")
 cargo_args+=("--features mmio,kvm")
-cargo build --release --target $BUILD_TARGET ${cargo_args[@]}
+cargo build --all --release --target $BUILD_TARGET ${cargo_args[@]}
 strip target/$BUILD_TARGET/release/cloud-hypervisor
 strip target/$BUILD_TARGET/release/vhost_user_net
 strip target/$BUILD_TARGET/release/ch-remote
@@ -221,4 +234,8 @@ EOF
     RES=$?
 fi
 
+# Tear vhost_user_net test network down
+sudo ip link del vunet-tap0
+sudo ip link del vunet-tap1
+
 exit $RES