Automate blockresize cases

Cover blockresize in various scenarios

Signed-off-by: Chunfu Wen <chwen@redhat.com>

libvirt/tests/cfg/virtual_disks/virtual_disks_blockresize.cfg

@@ -0,0 +1,53 @@
+- virtual_disks.blockresize:
+    type = virtual_disks_blockresize
+    take_regular_screendumps = "no"
+    start_vm = "no"
+    target_format = "raw"
+    type_name = "block"
+    driver_type = 'raw'
+    device_type = "disk"
+    target_dev = "sdb"
+    status_error = "no"
+    define_error = "no"
+    func_supported_since_libvirt_ver = (10, 0, 0)
+    offset = "512"
+    size_in_mb = "100"
+    block_size_in_bytes = "104857600"
+    disk_slice_attrs = "{'slice_type': 'storage', 'slice_offset': '0', 'slice_size': '512'}"
+    variants test_scenario:
+        - capacity:
+            resize_value = "--capacity"
+        - specific:
+            resize_value = "104857600B"
+        - save_restore:
+            only coldplug..virtio
+            resize_value = "--capacity"
+            vm_save = "/var/lib/libvirt/images/%s.save"
+        - not_equal_actual_size:
+            only coldplug..virtio
+            resize_value = "1024B"
+            status_error = "yes"
+            status_error_msg = "Operation not supported: block device backed disk must be resized to its actual size"
+        - not_zero_offset:
+            only coldplug..virtio
+            disk_slice_attrs = "{'slice_type': 'storage', 'slice_offset': '512', 'slice_size': '1024'}"
+            status_error = "yes"
+            resize_value = "--capacity"
+            status_error_msg = "Operation not supported: resize of a disk with storage slice with non-zero .*offset.*"
+        - non_raw_block_device:
+            only coldplug..virtio
+            overlay_source_file_path = "/var/lib/libvirt/images/qcow2"
+            driver_type = 'qcow2'
+            target_format = "qcow2"
+            status_error = "yes"
+            resize_value = "--capacity"
+            status_error_msg = "Operation not supported: block resize to full capacity supported only with.*raw.*local block-based disks"
+    variants target_bus:
+        - virtio:
+        - sata:
+        - scsi:
+    variants:
+        - coldplug:
+            virt_device_hotplug = "no"
+        - hotplug:
+            virt_device_hotplug = "yes"

libvirt/tests/src/virtual_disks/virtual_disks_blockresize.py

@@ -0,0 +1,232 @@
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#
+#   Copyright Red Hat
+#
+#   SPDX-License-Identifier: GPL-2.0
+
+#   Author: Chunfu Wen <chwen@redhat.com>
+#
+
+import logging
+import os
+import time
+
+from virttest import libvirt_version
+from virttest import virsh
+from virttest import virt_vm
+from virttest import utils_misc
+
+from virttest.libvirt_xml import vm_xml, xcepts
+from virttest.utils_libvirt import libvirt_disk
+from virttest.utils_test import libvirt
+
+
+LOG = logging.getLogger('avocado.' + __name__)
+cleanup_files = []
+
+
+def setup_scsi_debug_block_device():
+    """
+    Setup one scsi_debug block device
+
+    :return: device name
+    """
+    source_disk = libvirt.create_scsi_disk(scsi_option="",
+                                           scsi_size="100")
+    return source_disk
+
+
+def check_image_virtual_size(image_file, matched_size, test):
+    """
+    Check whether image virtual size queried by qemu-img is matched
+    :param image_file: image file path
+    :param matched_size: anticipated size
+    :param test: test case itself
+
+    """
+    disk_info_dict = utils_misc.get_image_info(image_file)
+    actual_size_in_bytes = str(disk_info_dict.get("vsize"))
+    if actual_size_in_bytes != matched_size:
+        test.fail(f"actual size of block disk is {actual_size_in_bytes}, but expected is : {matched_size}")
+
+
+def create_customized_disk(params, test):
+    """
+    Create one customized disk with related attributes
+
+    :param params: dict wrapped with params
+    :param test: test case itself
+    """
+    type_name = params.get("type_name")
+    disk_device = params.get("device_type")
+    device_target = params.get("target_dev")
+    device_bus = params.get("target_bus")
+    device_format = params.get("target_format")
+    source_file_path = setup_scsi_debug_block_device()
+    overlay_source_file_path = params.get("overlay_source_file_path")
+    matched_size = params.get("block_size_in_bytes")
+    source_dict = {}
+
+    # check block size
+    check_image_virtual_size(source_file_path, matched_size, test)
+
+    if source_file_path:
+        source_dict.update({"dev": source_file_path})
+
+    if overlay_source_file_path:
+        libvirt.create_local_disk("file", overlay_source_file_path, "100M", device_format)
+        cleanup_files.append(overlay_source_file_path)
+        convert_cmd = "qemu-img convert -f qcow2 -O qcow2 %s %s" % (overlay_source_file_path, source_file_path)
+
+    disk_src_dict = {"attrs": source_dict}
+
+    customized_disk = libvirt_disk.create_primitive_disk_xml(
+        type_name, disk_device,
+        device_target, device_bus,
+        device_format, disk_src_dict, None)
+
+    # Sometimes, slice size can be gotten by command (du -b source_file_path), but here not necessary
+    disk_slice_attrs = params.get('disk_slice_attrs')
+    if disk_slice_attrs:
+        disk_source = customized_disk.source
+        disk_source.slices = customized_disk.new_slices(**eval(disk_slice_attrs))
+        customized_disk.source = disk_source
+
+    LOG.debug("create customized xml: %s", customized_disk)
+    return customized_disk
+
+
+def check_slice_within_vm(vm, new_disk, slice_value):
+    """
+    Check disk slices attributes in guest internal
+
+    :param vm: vm object
+    :param new_disk: newly vm disk
+    :param slice_value: slice value
+    """
+    session = None
+    try:
+        session = vm.wait_for_login()
+        cmd = ("lsblk |grep {0}"
+               .format(new_disk))
+        status, output = session.cmd_status_output(cmd)
+        LOG.debug("Disk operation in VM:\nexit code:\n%s\noutput:\n%s",
+                  status, output)
+        return slice_value in output
+    except Exception as err:
+        LOG.debug("Error happens when check slices in vm: %s", str(err))
+        return False
+    finally:
+        if session:
+            session.close()
+
+
+def check_vm_dumpxml(params, test, expected_attribute=True):
+    """
+    Common method to check source in cdrom device
+
+    :param params: one collective object representing wrapped parameters
+    :param test: test object
+    :param expected_attribute: bool indicating whether expected attribute exists or not
+    """
+    vm_name = params.get("main_vm")
+    disk_vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
+    target_dev = params.get('target_dev')
+    disk = disk_vmxml.get_disk_all()[target_dev]
+    slices = disk.find('source').find('slices')
+    if not expected_attribute:
+        if slices is not None:
+            test.fail("unexpected slices appear in vm disk xml")
+    else:
+        if slices is None:
+            test.fail("slices can not be found in vm disk xml")
+
+
+def run(test, params, env):
+    """
+    Test resize disk with slices.
+
+    1.Prepare a vm with block disk
+    2.Attach block disk with slice attribute to the vm
+    3.Start vm
+    4.Resize the block disk
+    5.Check resize operations
+    6.Check status in VM internal
+    7.Detach device
+    """
+    vm_name = params.get("main_vm")
+    vm = env.get_vm(vm_name)
+    virsh_dargs = {'debug': True}
+
+    hotplug = "yes" == params.get("virt_device_hotplug")
+    part_path = "/dev/%s"
+
+    # Skip test if version not match expected one
+    libvirt_version.is_libvirt_feature_supported(params)
+
+    # Get disk partitions info before hot/cold plug virtual disk
+    if vm.is_alive():
+        vm.destroy(gracefully=False)
+
+    # Backup vm xml
+    vmxml_backup = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
+    vmxml = vmxml_backup.copy()
+
+    test_scenario = params.get("test_scenario")
+    target_bus = params.get("target_bus")
+    target_dev = params.get('target_dev')
+    status_error = "yes" == params.get("status_error")
+    try:
+        device_obj = create_customized_disk(params, test)
+        if not hotplug:
+            vmxml.add_device(device_obj)
+            vmxml.sync()
+        vm.start()
+        vm.wait_for_login()
+        if hotplug:
+            virsh.attach_device(vm_name, device_obj.xml,
+                                ignore_status=False, debug=True)
+    except xcepts.LibvirtXMLError as xml_error:
+        test.fail("Failed to define VM:\n%s" % str(xml_error))
+    except virt_vm.VMStartError as details:
+        test.fail("VM failed to start."
+                  "Error: %s" % str(details))
+    else:
+        session = vm.wait_for_login()
+        time.sleep(20)
+        new_disk, _ = libvirt_disk.get_non_root_disk_name(session)
+        session.close()
+        check_vm_dumpxml(params, test, True)
+
+        slice_value = params.get("offset")
+        check_slice_within_vm(vm, new_disk, slice_value)
+
+        if test_scenario in ["blockresize_save_restore"]:
+            vm_save = params.get("vm_save")
+            cleanup_files.append(vm_save)
+            virsh.save(vm_name, vm_save)
+            virsh.restore(vm_save)
+            vm.wait_for_login().close()
+
+        resize_value = params.get("resize_value")
+        result = virsh.blockresize(vm_name, target_dev,
+                                   resize_value, **virsh_dargs)
+        libvirt.check_exit_status(result, status_error)
+
+        check_vm_dumpxml(params, test, False)
+        slice_value = params.get("size_in_mb")
+        check_slice_within_vm(vm, new_disk, slice_value)
+        if hotplug:
+            virsh.detach_device(vm_name, device_obj.xml, flagstr="--live",
+                                debug=True, ignore_status=False)
+    finally:
+        if vm.is_alive():
+            vm.destroy(gracefully=False)
+        # Restoring vm
+        vmxml_backup.sync()
+        libvirt.delete_scsi_disk()
+        # Clean up files
+        for file_path in cleanup_files:
+            if os.path.exists(file_path):
+                os.remove(file_path)