From 14da540f2a68b3f730b1a7c31de783f3d68f6fc7 Mon Sep 17 00:00:00 2001 From: John Snow Date: Fri, 21 Dec 2018 04:35:29 -0500 Subject: iotests: add iotest 236 for testing bitmap merge New interface, new smoke test. Signed-off-by: John Snow Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake Message-Id: <20181221093529.23855-12-jsnow@redhat.com> [eblake: fix last-minute change to echo text] Signed-off-by: Eric Blake --- tests/qemu-iotests/236 | 161 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100755 tests/qemu-iotests/236 (limited to 'tests/qemu-iotests/236') diff --git a/tests/qemu-iotests/236 b/tests/qemu-iotests/236 new file mode 100755 index 0000000000..79a6381f8e --- /dev/null +++ b/tests/qemu-iotests/236 @@ -0,0 +1,161 @@ +#!/usr/bin/env python +# +# Test bitmap merges. +# +# Copyright (c) 2018 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 . +# +# owner=jsnow@redhat.com + +import iotests +from iotests import log + +iotests.verify_image_format(supported_fmts=['generic']) +size = 64 * 1024 * 1024 +granularity = 64 * 1024 + +patterns = [("0x5d", "0", "64k"), + ("0xd5", "1M", "64k"), + ("0xdc", "32M", "64k"), + ("0xcd", "0x3ff0000", "64k")] # 64M - 64K + +overwrite = [("0xab", "0", "64k"), # Full overwrite + ("0xad", "0x00f8000", "64k"), # Partial-left (1M-32K) + ("0x1d", "0x2008000", "64k"), # Partial-right (32M+32K) + ("0xea", "0x3fe0000", "64k")] # Adjacent-left (64M - 128K) + +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) + vm.launch() + + log('\n--- Adding preliminary bitmaps A & B ---\n') + vm.qmp_log("block-dirty-bitmap-add", node="drive0", + name="bitmapA", granularity=granularity) + vm.qmp_log("block-dirty-bitmap-add", node="drive0", + name="bitmapB", granularity=granularity) + + # Dirties 4 clusters. count=262144 + log('\n--- Emulating writes ---\n') + for p in patterns: + cmd = "write -P%s %s %s" % p + log(cmd) + log(vm.hmp_qemu_io("drive0", cmd)) + + log(query_bitmaps(vm), indent=2) + + log('\n--- Submitting & Aborting Transaction ---\n') + vm.qmp_log("transaction", indent=2, actions=[ + { "type": "block-dirty-bitmap-disable", + "data": { "node": "drive0", "name": "bitmapB" }}, + { "type": "block-dirty-bitmap-add", + "data": { "node": "drive0", "name": "bitmapC", + "granularity": granularity }}, + { "type": "block-dirty-bitmap-clear", + "data": { "node": "drive0", "name": "bitmapA" }}, + { "type": "abort", "data": {}} + ]) + log(query_bitmaps(vm), indent=2) + + log('\n--- Disabling B & Adding C ---\n') + vm.qmp_log("transaction", indent=2, actions=[ + { "type": "block-dirty-bitmap-disable", + "data": { "node": "drive0", "name": "bitmapB" }}, + { "type": "block-dirty-bitmap-add", + "data": { "node": "drive0", "name": "bitmapC", + "granularity": granularity }}, + # Purely extraneous, but test that it works: + { "type": "block-dirty-bitmap-disable", + "data": { "node": "drive0", "name": "bitmapC" }}, + { "type": "block-dirty-bitmap-enable", + "data": { "node": "drive0", "name": "bitmapC" }}, + ]) + + log('\n--- Emulating further writes ---\n') + # Dirties 6 clusters, 3 of which are new in contrast to "A". + # A = 64 * 1024 * (4 + 3) = 458752 + # C = 64 * 1024 * 6 = 393216 + for p in overwrite: + cmd = "write -P%s %s %s" % p + log(cmd) + log(vm.hmp_qemu_io("drive0", cmd)) + + log('\n--- Disabling A & C ---\n') + vm.qmp_log("transaction", indent=2, actions=[ + { "type": "block-dirty-bitmap-disable", + "data": { "node": "drive0", "name": "bitmapA" }}, + { "type": "block-dirty-bitmap-disable", + "data": { "node": "drive0", "name": "bitmapC" }} + ]) + + # A: 7 clusters + # B: 4 clusters + # C: 6 clusters + log(query_bitmaps(vm), indent=2) + + log('\n--- Submitting & Aborting Merge Transaction ---\n') + vm.qmp_log("transaction", indent=2, actions=[ + { "type": "block-dirty-bitmap-add", + "data": { "node": "drive0", "name": "bitmapD", + "disabled": True, "granularity": granularity }}, + { "type": "block-dirty-bitmap-merge", + "data": { "node": "drive0", "target": "bitmapD", + "bitmaps": ["bitmapB", "bitmapC"] }}, + { "type": "abort", "data": {}} + ]) + log(query_bitmaps(vm), indent=2) + + log('\n--- Creating D as a merge of B & C ---\n') + # Good hygiene: create a disabled bitmap as a merge target. + vm.qmp_log("transaction", indent=2, actions=[ + { "type": "block-dirty-bitmap-add", + "data": { "node": "drive0", "name": "bitmapD", + "disabled": True, "granularity": granularity }}, + { "type": "block-dirty-bitmap-merge", + "data": { "node": "drive0", "target": "bitmapD", + "bitmaps": ["bitmapB", "bitmapC"] }} + ]) + + # A and D should now both have 7 clusters apiece. + # B and C remain unchanged with 4 and 6 respectively. + log(query_bitmaps(vm), indent=2) + + # A and D should be equivalent. + # Some formats round the size of the disk, so don't print the checksums. + check_a = vm.qmp('x-debug-block-dirty-bitmap-sha256', + node="drive0", name="bitmapA")['return']['sha256'] + check_d = vm.qmp('x-debug-block-dirty-bitmap-sha256', + node="drive0", name="bitmapD")['return']['sha256'] + assert(check_a == check_d) + + log('\n--- Removing bitmaps A, B, C, and D ---\n') + vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="bitmapA") + vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="bitmapB") + vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="bitmapC") + vm.qmp_log("block-dirty-bitmap-remove", node="drive0", name="bitmapD") + + log('\n--- Final Query ---\n') + log(query_bitmaps(vm), indent=2) + + log('\n--- Done ---\n') + vm.shutdown() -- cgit v1.2.3