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From b4841fd40fefcffc99c4b52c8a06720edb4ef9ef Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 30 Aug 2019 12:56:28 +0100
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Subject: [PATCH 10/10] iotests: Test allocate_first_block() with O_DIRECT
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20190830125628.23668-6-thuth@redhat.com>
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Patchwork-id: 90212
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v2 5/5] iotests: Test allocate_first_block() with O_DIRECT
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Bugzilla: 1738839
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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From: Nir Soffer <nirsof@gmail.com>
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Using block_resize we can test allocate_first_block() with file
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descriptor opened with O_DIRECT, ensuring that it works for any size
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larger than 4096 bytes.
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Testing smaller sizes is tricky as the result depends on the filesystem
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used for testing. For example on NFS any size will work since O_DIRECT
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does not require any alignment.
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Signed-off-by: Nir Soffer <nsoffer@redhat.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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Message-id: 20190827010528.8818-3-nsoffer@redhat.com
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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(cherry picked from commit 4656fb5ebbece8c7bbca0bef56bea882c94b9132)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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tests/qemu-iotests/175 | 28 ++++++++++++++++++++++++++++
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tests/qemu-iotests/175.out | 8 ++++++++
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2 files changed, 36 insertions(+)
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diff --git a/tests/qemu-iotests/175 b/tests/qemu-iotests/175
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index b3b7712..74ca49d 100755
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--- a/tests/qemu-iotests/175
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+++ b/tests/qemu-iotests/175
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@@ -50,6 +50,23 @@ _filter_blocks()
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-e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/"
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}
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+# Resize image using block_resize.
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+# Parameter 1: image path
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+# Parameter 2: new size
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+_block_resize()
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+{
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+ local path=$1
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+ local size=$2
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+
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+ $QEMU -qmp stdio -nographic -nodefaults \
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+ -blockdev file,node-name=file,filename=$path,cache.direct=on \
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+ <
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+{'execute': 'qmp_capabilities'}
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+{'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}}
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+{'execute': 'quit'}
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+EOF
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+}
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+
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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@@ -58,6 +75,9 @@ _supported_fmt raw
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_supported_proto file
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_supported_os Linux
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+_default_cache_mode none
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+_supported_cache_modes none directsync
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+
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size=$((1 * 1024 * 1024))
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touch "$TEST_DIR/empty"
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@@ -80,6 +100,14 @@ for mode in off full falloc; do
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stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
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done
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+for new_size in 4096 1048576; do
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+ echo
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+ echo "== resize empty image with block_resize =="
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+ _make_test_img 0 | _filter_imgfmt
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+ _block_resize $TEST_IMG $new_size >/dev/null
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+ stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size
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+done
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+
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# success, all done
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echo "*** done"
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rm -f $seq.full
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diff --git a/tests/qemu-iotests/175.out b/tests/qemu-iotests/175.out
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index 263e521..39c2ee0 100644
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--- a/tests/qemu-iotests/175.out
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+++ b/tests/qemu-iotests/175.out
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@@ -15,4 +15,12 @@ size=1048576, max allocation
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== creating image with preallocation falloc ==
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=falloc
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size=1048576, max allocation
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+
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+== resize empty image with block_resize ==
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+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=0
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+size=4096, min allocation
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+
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+== resize empty image with block_resize ==
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+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=0
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+size=1048576, min allocation
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*** done
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--
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1.8.3.1
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