From d193f7ee2bf7822408fa9a92b7e170330b7f6ec4 Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Tue, 23 Jul 2019 14:45:41 +0100 Subject: [PATCH 03/14] iotests: Test unaligned raw images with O_DIRECT RH-Author: Max Reitz Message-id: <20190723144546.23701-3-mreitz@redhat.com> Patchwork-id: 89648 O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 2/7] iotests: Test unaligned raw images with O_DIRECT Bugzilla: 1678979 RH-Acked-by: Kevin Wolf RH-Acked-by: Stefano Garzarella RH-Acked-by: John Snow We already have 221 for accesses through the page cache, but it is better to create a new file for O_DIRECT instead of integrating those test cases into 221. This way, we can make use of _supported_cache_modes (and _default_cache_mode) so the test is automatically skipped on filesystems that do not support O_DIRECT. As part of the split, add _supported_cache_modes to 221. With that, it no longer fails when run with -c none or -c directsync. Signed-off-by: Max Reitz Reviewed-by: Eric Blake Signed-off-by: Kevin Wolf (cherry picked from commit 2fab30c80b33cdc6157c7efe6207e54b6835cf92) Signed-off-by: Max Reitz Signed-off-by: Danilo C. L. de Paula --- tests/qemu-iotests/221 | 4 +++ tests/qemu-iotests/253 | 84 ++++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/253.out | 14 ++++++++ tests/qemu-iotests/group | 1 + 4 files changed, 103 insertions(+) create mode 100755 tests/qemu-iotests/253 create mode 100644 tests/qemu-iotests/253.out diff --git a/tests/qemu-iotests/221 b/tests/qemu-iotests/221 index 41c4e4b..2cc29ba 100755 --- a/tests/qemu-iotests/221 +++ b/tests/qemu-iotests/221 @@ -1,6 +1,7 @@ #!/bin/bash # # Test qemu-img vs. unaligned images +# (See also 253, which is the O_DIRECT version) # # Copyright (C) 2018 Red Hat, Inc. # @@ -38,6 +39,9 @@ _supported_fmt raw _supported_proto file _supported_os Linux +_default_cache_mode writeback +_supported_cache_modes writeback writethrough unsafe + echo echo "=== Check mapping of unaligned raw image ===" echo diff --git a/tests/qemu-iotests/253 b/tests/qemu-iotests/253 new file mode 100755 index 0000000..d88d5af --- /dev/null +++ b/tests/qemu-iotests/253 @@ -0,0 +1,84 @@ +#!/usr/bin/env bash +# +# Test qemu-img vs. unaligned images; O_DIRECT version +# (Originates from 221) +# +# Copyright (C) 2019 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 . +# + +seq="$(basename $0)" +echo "QA output created by $seq" + +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt raw +_supported_proto file +_supported_os Linux + +_default_cache_mode none +_supported_cache_modes none directsync + +echo +echo "=== Check mapping of unaligned raw image ===" +echo + +# We do not know how large a physical sector is, but it is certainly +# going to be a factor of 1 MB +size=$((1 * 1024 * 1024 - 1)) + +# qemu-img create rounds size up to BDRV_SECTOR_SIZE +_make_test_img $size +$QEMU_IMG map --output=json --image-opts \ + "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ + | _filter_qemu_img_map + +# so we resize it and check again +truncate --size=$size "$TEST_IMG" +$QEMU_IMG map --output=json --image-opts \ + "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ + | _filter_qemu_img_map + +# qemu-io with O_DIRECT always writes whole physical sectors. Again, +# we do not know how large a physical sector is, so we just start +# writing from a 64 kB boundary, which should always be aligned. +offset=$((1 * 1024 * 1024 - 64 * 1024)) +$QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json --image-opts \ + "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ + | _filter_qemu_img_map + +# Resize it and check again -- contrary to 221, we may not get partial +# sectors here, so there should be only two areas (one zero, one +# data). +truncate --size=$size "$TEST_IMG" +$QEMU_IMG map --output=json --image-opts \ + "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ + | _filter_qemu_img_map + +# success, all done +echo '*** done' +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/253.out b/tests/qemu-iotests/253.out new file mode 100644 index 0000000..607c0ba --- /dev/null +++ b/tests/qemu-iotests/253.out @@ -0,0 +1,14 @@ +QA output created by 253 + +=== Check mapping of unaligned raw image === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048575 +[{ "start": 0, "length": 1048576, "depth": 0, "zero": true, "data": false, "offset": OFFSET}] +[{ "start": 0, "length": 1048576, "depth": 0, "zero": true, "data": false, "offset": OFFSET}] +wrote 65535/65535 bytes at offset 983040 +63.999 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +[{ "start": 0, "length": 983040, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 983040, "length": 65536, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +[{ "start": 0, "length": 983040, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 983040, "length": 65536, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index 5cbdc24..b356d82 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -227,3 +227,4 @@ 232 auto quick 234 auto quick migration 240 auto quick +253 rw auto quick -- 1.8.3.1