import logging import re from autotest.client.shared import error from virttest import utils_misc from virttest import utils_test from virttest import storage from virttest import data_dir @error.context_aware def run(test, params, env): """ KVM block resize test: 1) Start guest with data image and check the data image size. 2) Enlarge(or Decrease) the data image and check it in guest. :param test: QEMU test object :param params: Dictionary with the test parameters :param env: Dictionary with test environment. """ def get_block_size(session, block_cmd, block_pattern): """ Get block size inside guest. """ output = session.cmd_output(block_cmd) block_size = re.findall(block_pattern, output) if block_size: if not re.search("[a-zA-Z]", block_size[0]): return int(block_size[0]) else: return float(utils_misc.normalize_data_size(block_size[0], order_magnitude="B")) else: raise error.TestError("Can not find the block size for the" " deivce. The output of command" " is: %s" % output) def compare_block_size(session, block_cmd, block_pattern): """ Compare the current block size with the expected size. """ global current_size current_size = get_block_size(session, block_size_cmd, block_size_pattern) if (current_size <= block_size and current_size >= block_size * (1 - accept_ratio)): logging.info("Block Resizing Finished !!! \n" "Current size %s is same as the expected %s", current_size, block_size) return True return vm = env.get_vm(params["main_vm"]) vm.verify_alive() timeout = float(params.get("login_timeout", 240)) driver_name = params.get("driver_name") if params.get("os_type") == "windows": utils_test.qemu.setup_win_driver_verifier(driver_name, vm, timeout) session = vm.wait_for_login(timeout=timeout) data_image = params.get("images").split()[-1] data_image_params = params.object_params(data_image) data_image_size = data_image_params.get("image_size") data_image_size = float(utils_misc.normalize_data_size(data_image_size, order_magnitude="B")) data_image_filename = storage.get_image_filename(data_image_params, data_dir.get_data_dir()) data_image_dev = vm.get_block({'file': data_image_filename}) drive_path = "" if params.get("os_type") == 'linux': drive_id = params["blk_extra_params_%s" % data_image].split("=")[1] drive_path = utils_misc.get_linux_drive_path(session, drive_id) if not drive_path: raise error.TestError("Failed to get '%s' drive path" % data_image) block_size_cmd = params["block_size_cmd"].format(drive_path) block_size_pattern = params.get("block_size_pattern") need_reboot = params.get("need_reboot", "no") == "yes" accept_ratio = float(params.get("accept_ratio", 0)) error.context("Check image size in guest", logging.info) block_size = get_block_size(session, block_size_cmd, block_size_pattern) if (block_size > data_image_size or block_size < data_image_size * (1 - accept_ratio)): raise error.TestError("Image size from guest and image not match" "Block size get from guest: %s \n" "Image size get from image: %s \n" % (block_size, data_image_size)) if params.get("guest_prepare_cmd"): session.cmd(params.get("guest_prepare_cmd")) if params.get("format_disk", "no") == "yes": error.context("Format disk", logging.info) utils_misc.format_windows_disk(session, params["disk_index"], mountpoint=params["disk_letter"]) disk_update_cmd = params.get("disk_update_cmd") if disk_update_cmd: disk_update_cmd = disk_update_cmd.split("::") disk_rescan_cmd = params.get("disk_rescan_cmd") block_size = data_image_size disk_change_ratio = params["disk_change_ratio"] for index, ratio in enumerate(disk_change_ratio.strip().split()): old_block_size = block_size block_size = int(int(data_image_size) * float(ratio)) if block_size == old_block_size: logging.warn("Block size is not changed in round %s." " Just skip it" % index) continue if disk_update_cmd: if "DISK_CHANGE_SIZE" in disk_update_cmd[index]: disk_unit = params.get("disk_unit", "M") size = abs(block_size - old_block_size) change_size = utils_misc.normalize_data_size("%sB" % size, disk_unit) disk_update_cmd[index] = re.sub("DISK_CHANGE_SIZE", change_size.split(".")[0], disk_update_cmd[index]) # So far only virtio drivers support online auto block size change in # linux guest. So we need manully update the the disk or even reboot # guest to get the right block size after change it from monitor. # We need shrink the disk in guest first, than in monitor if block_size < old_block_size and disk_update_cmd: error.context("Shrink disk size to %s in guest" % block_size, logging.info) session.cmd(disk_update_cmd[index]) error.context("Change disk size to %s in monitor" % block_size, logging.info) vm.monitor.block_resize(data_image_dev, block_size) if need_reboot: session = vm.reboot(session=session) elif disk_rescan_cmd: error.context("Rescan disk", logging.info) session.cmd(disk_rescan_cmd) # We need expand disk in monitor first than extend it in guest if block_size > old_block_size and disk_update_cmd: error.context("Extend disk to %s in guest" % block_size, logging.info) session.cmd(disk_update_cmd[index]) global current_size current_size = 0 if not utils_misc.wait_for(lambda: compare_block_size (session, block_size_cmd, block_size_pattern), 20, 0, 1, "Block Resizing"): raise error.TestFail("Block size get from guest is not" "the same as expected \n" "Reported: %s\n" "Expect: %s\n" % (current_size, block_size))