[01/20] qemu-iotests: Test qcow2 preallocation modes

Commit Message

Kevin Wolf Feb. 27, 2019, 5:22 p.m. UTC

Signed-off-by: Kevin Wolf <[e-mail]>
---
 tests/qemu-iotests/243     | 63 ++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/243.out | 26 ++++++++++++++++
 tests/qemu-iotests/group   |  1 +
 3 files changed, 90 insertions(+)
 create mode 100755 tests/qemu-iotests/243
 create mode 100644 tests/qemu-iotests/243.out

Comments

Eric Blake March 1, 2019, 4:43 p.m. UTC | #1

On 2/27/19 11:22 AM, Kevin Wolf wrote:
> Signed-off-by: Kevin Wolf <[e-mail]>
> ---

> +++ b/tests/qemu-iotests/243
> @@ -0,0 +1,63 @@


> +
> +    echo -n "File size: "

echo -n is non-portable (bash has shopt -s xpg_echo); better is to just
use printf.  See commit b43671f8

> +    du -b $TEST_IMG | cut -f1
> +
> +    # Can't use precise numbers here because they differ between filesystems
> +    echo -n "Disk usage: "

and again

> +    [ $(du -B1 $TEST_IMG | cut -f1) -lt 1048576 ] && echo "low" || echo "high"

du -b/-B are not portable to POSIX, but you did limit the test to just
Linux where they are fairly likely, so I don't have any better
suggestions.  I like the masking into high/low to work around file
system granularity quirks as well as image metadata size differences.

As using printf instead of echo -n is trivial,
Reviewed-by: Eric Blake <[e-mail]>

Patch

diff --git a/tests/qemu-iotests/243 b/tests/qemu-iotests/243
new file mode 100755
index 0000000000..5ab1b7863d
--- /dev/null
+++ b/tests/qemu-iotests/243
@@ -0,0 +1,63 @@ 
+#!/bin/bash
+#
+# Test qcow2 preallocation
+#
+# 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 <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=[e-mail]
+
+seq=$(basename $0)
+echo "QA output created by $seq"
+
+status=1	# failure is the default!
+
+_cleanup()
+{
+    _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+for mode in off metadata falloc full; do
+
+    echo
+    echo "=== preallocation=$mode ==="
+    echo
+
+    IMGOPTS="preallocation=$mode" _make_test_img 64M
+
+    echo -n "File size: "
+    du -b $TEST_IMG | cut -f1
+
+    # Can't use precise numbers here because they differ between filesystems
+    echo -n "Disk usage: "
+    [ $(du -B1 $TEST_IMG | cut -f1) -lt 1048576 ] && echo "low" || echo "high"
+
+done
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/243.out b/tests/qemu-iotests/243.out
new file mode 100644
index 0000000000..e531753ad1
--- /dev/null
+++ b/tests/qemu-iotests/243.out
@@ -0,0 +1,26 @@ 
+QA output created by 243
+
+=== preallocation=off ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=off
+File size: 196616
+Disk usage: low
+
+=== preallocation=metadata ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=metadata
+File size: 67436544
+Disk usage: low
+
+=== preallocation=falloc ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=falloc
+File size: 67436544
+Disk usage: high
+
+=== preallocation=full ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=full
+File size: 67436544
+Disk usage: high
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index b5ca63cf72..03aa93dbf5 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -241,3 +241,4 @@ 
 239 rw auto quick
 240 auto quick
 242 rw auto quick
+243 rw auto quick