tests: qcow: Add testing for uncompressed backing file

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

scripts/run_integration_tests_aarch64.sh

@@ -90,6 +90,16 @@ update_workloads() {
         popd || exit
     fi
 
+    JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME="jammy-server-cloudimg-arm64-custom-20220329-0-backing-uncompressed.qcow2"
+    JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE="$WORKLOADS_DIR/$JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME"
+    if [ ! -f "$JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE" ]; then
+        pushd "$WORKLOADS_DIR" || exit
+        time qemu-img create -f qcow2 \
+            -b "$JAMMY_OS_QCOW2_UNCOMPRESSED_IMAGE" \
+            -F qcow2 $JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME
+        popd || exit
+    fi
+
     ALPINE_MINIROOTFS_URL="http://dl-cdn.alpinelinux.org/alpine/v3.11/releases/aarch64/alpine-minirootfs-3.11.3-aarch64.tar.gz"
     ALPINE_MINIROOTFS_TARBALL="$WORKLOADS_DIR/alpine-minirootfs-aarch64.tar.gz"
     if [ ! -f "$ALPINE_MINIROOTFS_TARBALL" ]; then

scripts/run_integration_tests_x86_64.sh

@@ -90,6 +90,16 @@ if [ ! -f "$JAMMY_OS_QCOW_BACKING_ZSTD_FILE_IMAGE" ]; then
     popd || exit
 fi
 
+JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME="jammy-server-cloudimg-amd64-custom-20241017-0-backing-uncompressed.qcow2"
+JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE="$WORKLOADS_DIR/$JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME"
+if [ ! -f "$JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE" ]; then
+    pushd "$WORKLOADS_DIR" || exit
+    time qemu-img create -f qcow2 \
+        -b "$JAMMY_OS_IMAGE" \
+        -F qcow2 $JAMMY_OS_QCOW_BACKING_UNCOMPRESSED_FILE_IMAGE_NAME
+    popd || exit
+fi
+
 ALPINE_MINIROOTFS_URL="http://dl-cdn.alpinelinux.org/alpine/v3.11/releases/x86_64/alpine-minirootfs-3.11.3-x86_64.tar.gz"
 ALPINE_MINIROOTFS_TARBALL="$WORKLOADS_DIR/alpine-minirootfs-x86_64.tar.gz"
 if [ ! -f "$ALPINE_MINIROOTFS_TARBALL" ]; then

tests/integration.rs

@@ -47,6 +47,8 @@ mod x86_64 {
         "jammy-server-cloudimg-amd64-custom-20241017-0-zstd.qcow2";
     pub const JAMMY_IMAGE_NAME_QCOW2_BACKING_ZSTD_FILE: &str =
         "jammy-server-cloudimg-amd64-custom-20241017-0-backing-zstd.qcow2";
+    pub const JAMMY_IMAGE_NAME_QCOW2_BACKING_UNCOMPRESSED_FILE: &str =
+        "jammy-server-cloudimg-amd64-custom-20241017-0-backing-uncompressed.qcow2";
     pub const WINDOWS_IMAGE_NAME: &str = "windows-server-2022-amd64-2.raw";
     pub const OVMF_NAME: &str = "CLOUDHV.fd";
     pub const GREP_SERIAL_IRQ_CMD: &str = "grep -c 'IO-APIC.*ttyS0' /proc/interrupts || true";
@@ -70,6 +72,8 @@ mod aarch64 {
         "jammy-server-cloudimg-arm64-custom-20220329-0-zstd.qcow2";
     pub const JAMMY_IMAGE_NAME_QCOW2_BACKING_ZSTD_FILE: &str =
         "jammy-server-cloudimg-arm64-custom-20220329-0-backing-zstd.qcow2";
+    pub const JAMMY_IMAGE_NAME_QCOW2_BACKING_UNCOMPRESSED_FILE: &str =
+        "jammy-server-cloudimg-arm64-custom-20220329-0-backing-uncompressed.qcow2";
     pub const WINDOWS_IMAGE_NAME: &str = "windows-11-iot-enterprise-aarch64.raw";
     pub const OVMF_NAME: &str = "CLOUDHV_EFI.fd";
     pub const GREP_SERIAL_IRQ_CMD: &str = "grep -c 'GICv3.*uart-pl011' /proc/interrupts || true";
@@ -3547,6 +3551,12 @@ mod common_parallel {
         disk_check_consistency(JAMMY_IMAGE_NAME_QCOW2_BACKING_ZSTD_FILE);
     }
 
+    #[test]
+    fn test_virtio_block_qcow2_backing_uncompressed_file() {
+        _test_virtio_block(JAMMY_IMAGE_NAME_QCOW2_BACKING_UNCOMPRESSED_FILE, false, false);
+        disk_check_consistency(JAMMY_IMAGE_NAME_QCOW2_BACKING_UNCOMPRESSED_FILE);
+    }
+
     #[test]
     fn test_virtio_block_vhd() {
         let mut workload_path = dirs::home_dir().unwrap();