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#!/usr/bin/env python3
#
# Test persistent bitmap resizing.
#
# Copyright (c) 2019 John Snow for Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# owner=jsnow@redhat.com
import iotests
from iotests import log
iotests.script_initialize(supported_fmts=['qcow2'])
size = 64 * 1024 * 1024 * 1024
gran_small = 32 * 1024
gran_large = 128 * 1024
def query_bitmaps(vm):
res = vm.qmp("query-block")
return { "bitmaps": { device['device']: device.get('dirty-bitmaps', []) for
device in res['return'] } }
with iotests.FilePath('img') as img_path, \
iotests.VM() as vm:
log('--- Preparing image & VM ---\n')
iotests.qemu_img_create('-f', iotests.imgfmt, img_path, str(size))
vm.add_drive(img_path)
log('--- 1st Boot (Establish Baseline Image) ---\n')
vm.launch()
log('\n--- Adding bitmaps Small, Medium, Large, and Transient ---\n')
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="Small", granularity=gran_small, persistent=True)
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="Medium", persistent=True)
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="Large", granularity=gran_large, persistent=True)
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="Transient", persistent=False)
log('--- Forcing flush of bitmaps to disk ---\n')
log(query_bitmaps(vm), indent=2)
vm.shutdown()
log('--- 2nd Boot (Grow Image) ---\n')
vm.launch()
log(query_bitmaps(vm), indent=2)
log('--- Adding new bitmap, growing image, and adding 2nd new bitmap ---')
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="New", persistent=True)
vm.qmp_log("human-monitor-command",
command_line="block_resize drive0 70G")
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="Newtwo", persistent=True)
log(query_bitmaps(vm), indent=2)
log('--- Forcing flush of bitmaps to disk ---\n')
vm.shutdown()
log('--- 3rd Boot (Shrink Image) ---\n')
vm.launch()
log(query_bitmaps(vm), indent=2)
log('--- Adding "NewB" bitmap, removing "New" bitmap ---')
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="NewB", persistent=True)
vm.qmp_log("block-dirty-bitmap-remove", node="drive0",
name="New")
log('--- Truncating image ---\n')
vm.qmp_log("human-monitor-command",
command_line="block_resize drive0 50G")
log('--- Adding "NewC" bitmap, removing "NewTwo" bitmap ---')
vm.qmp_log("block-dirty-bitmap-add", node="drive0",
name="NewC", persistent=True)
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="Newtwo")
log('--- Forcing flush of bitmaps to disk ---\n')
vm.shutdown()
log('--- 4th Boot (Verification and Cleanup) ---\n')
vm.launch()
log(query_bitmaps(vm), indent=2)
log('--- Removing all Bitmaps ---\n')
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="Small")
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="Medium")
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="Large")
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="NewB")
vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="NewC")
log(query_bitmaps(vm), indent=2)
log('\n--- Done ---')
vm.shutdown()
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