qemu-iotests: Test qcow2 preallocation modes
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
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#!/bin/bash
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#
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# Test qcow2 preallocation
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq=$(basename $0)
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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for mode in off metadata falloc full; do
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echo
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echo "=== preallocation=$mode ==="
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echo
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IMGOPTS="preallocation=$mode" _make_test_img 64M
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printf "File size: "
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du -b $TEST_IMG | cut -f1
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# Can't use precise numbers here because they differ between filesystems
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printf "Disk usage: "
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[ $(du -B1 $TEST_IMG | cut -f1) -lt 1048576 ] && echo "low" || echo "high"
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done
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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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status=0
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QA output created by 243
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=== preallocation=off ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=off
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File size: 196616
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Disk usage: low
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=== preallocation=metadata ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=metadata
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File size: 67436544
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Disk usage: low
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=== preallocation=falloc ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=falloc
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File size: 67436544
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Disk usage: high
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=== preallocation=full ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=full
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File size: 67436544
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Disk usage: high
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*** done
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@ -241,3 +241,4 @@
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239 rw auto quick
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239 rw auto quick
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240 auto quick
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240 auto quick
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242 rw auto quick
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242 rw auto quick
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243 rw auto quick
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