bf22957309
Running
git grep '\$here' tests/qemu-iotests
has 0 hits, which means we are setting a variable that has
no use. It appears that commit e8f8624d removed the last
use. So execute the following cmd to remove all of
the 'here=...' lines as dead code.
sed -i '/^here=/d' $(git grep -l '^here=' tests/qemu-iotests)
Cc: kwolf@redhat.com
Cc: mreitz@redhat.com
Cc: eblake@redhat.com
Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Message-Id: <20181024094051.4470-3-maozhongyi@cmss.chinamobile.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: touch up commit message, reorder series, rebase to master]
Signed-off-by: Eric Blake <eblake@redhat.com>
131 lines
4.7 KiB
Bash
Executable File
131 lines
4.7 KiB
Bash
Executable File
#!/bin/bash
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#
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# Test case for write zeroes with unmap
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#
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# Copyright (C) 2017 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=eblake@redhat.com
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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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rm -f "$TEST_DIR/blkdebug.conf"
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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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# v2 images can't mark clusters as zero
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_unsupported_imgopts compat=0.10
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echo
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echo '=== Testing write zeroes with unmap ==='
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echo
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TEST_IMG="$TEST_IMG.base" _make_test_img 64M
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_make_test_img -b "$TEST_IMG.base"
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# Offsets chosen at or near 2M boundaries so test works at all cluster sizes
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# 8k and larger (smaller clusters fail due to non-contiguous allocations)
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# Aligned writes to unallocated cluster should not allocate mapping, but must
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# mark cluster as zero, whether or not unmap was requested
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$QEMU_IO -c "write -z -u 2M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z 6M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map
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# Unaligned writes need not allocate mapping if the cluster already reads
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# as zero, but must mark cluster as zero, whether or not unmap was requested
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$QEMU_IO -c "write -z -u 10485761 2097150" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z 14680065 2097150" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map
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# Requesting unmap of normal data must deallocate; omitting unmap should
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# preserve the mapping
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$QEMU_IO -c "write 18M 14M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z -u 20M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z 24M 6M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map
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# Likewise when writing on already-mapped zero data
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$QEMU_IO -c "write -z -u 26M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z 28M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map
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# Writing on unmapped zeroes does not allocate
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$QEMU_IO -c "write -z 32M 8M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z -u 34M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z 36M 2M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map
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# Writing zero overrides a backing file, regardless of backing cluster type
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$QEMU_IO -c "write -z 40M 8M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write 48M 8M" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -z -u 42M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -z 44M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -z -u 50M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -z 52M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -z -u 58M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -z 60M 2M" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "map" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
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# Final check that mappings are correct and images are still sane
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TEST_IMG="$TEST_IMG.base" _check_test_img
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_check_test_img
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echo
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echo '=== Testing cache optimization ==='
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echo
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BLKDBG_TEST_IMG="blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG.base"
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cat > "$TEST_DIR/blkdebug.conf" <<EOF
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[inject-error]
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event = "l2_update"
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errno = "5"
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immediately = "on"
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once = "off"
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EOF
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# None of the following writes should trigger an L2 update, because the
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# cluster already reads as zero, and we don't have to change allocation
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$QEMU_IO -c "w -z -u 20M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "w -z 20M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "w -z 28M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
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# success, all done
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echo '*** done'
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status=0
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