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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>
190 lines
4.9 KiB
Bash
Executable File
190 lines
4.9 KiB
Bash
Executable File
#!/bin/bash
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#
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# Test case for preallocated zero clusters in qcow2
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#
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# Copyright (C) 2013 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=mreitz@redhat.com
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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# This tests qocw2-specific low-level functionality
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_supported_fmt qcow2
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_supported_proto generic
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_supported_os Linux
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# Intentionally create an unaligned image
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IMGOPTS="compat=1.1"
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IMG_SIZE=$((64 * 1024 * 1024 + 512))
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echo
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echo "=== Testing cluster discards ==="
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echo
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_make_test_img $IMG_SIZE
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# Write some normal clusters, zero some of them (creating preallocated
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# zero clusters) and discard everything. Everything should now read as 0.
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$QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "write 64M 512" \
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-c "discard 0 $IMG_SIZE" -c "read -P 0 0 $IMG_SIZE" "$TEST_IMG" \
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| _filter_qemu_io
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# Check the image (there shouldn't be any leaks)
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_check_test_img
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# Map the image (we want all clusters to be gone)
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$QEMU_IMG map "$TEST_IMG"
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_cleanup_test_img
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echo
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echo '=== Writing to preallocated zero clusters ==='
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echo
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_make_test_img $IMG_SIZE
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# Create data clusters (not aligned to an L2 table)
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$QEMU_IO -c 'write -P 42 1M 256k' "$TEST_IMG" | _filter_qemu_io
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orig_map=$($QEMU_IMG map --output=json "$TEST_IMG")
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# Convert the data clusters to preallocated zero clusters
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$QEMU_IO -c 'write -z 1M 256k' "$TEST_IMG" | _filter_qemu_io
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# Now write to them (with a COW needed for the head and tail)
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$QEMU_IO -c "write -P 23 $(((1024 + 32) * 1024)) 192k" "$TEST_IMG" \
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| _filter_qemu_io
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# Check metadata correctness
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_check_test_img
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# Check data correctness
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$QEMU_IO -c "read -P 0 $(( 1024 * 1024)) 32k" \
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-c "read -P 23 $(((1024 + 32) * 1024)) 192k" \
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-c "read -P 0 $(((1024 + 32 + 192) * 1024)) 32k" \
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"$TEST_IMG" \
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| _filter_qemu_io
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# Check that we have actually reused the original area
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new_map=$($QEMU_IMG map --output=json "$TEST_IMG")
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if [ "$new_map" = "$orig_map" ]; then
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echo 'Successfully reused original clusters.'
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else
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echo 'Failed to reuse original clusters.'
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echo 'Original map:'
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echo "$orig_map"
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echo 'New map:'
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echo "$new_map"
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fi
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_cleanup_test_img
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echo
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echo '=== Writing to a snapshotted preallocated zero cluster ==='
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echo
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_make_test_img 64k
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# Create a preallocated zero cluster
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$QEMU_IO -c 'write -P 42 0 64k' -c 'write -z 0 64k' "$TEST_IMG" \
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| _filter_qemu_io
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# Snapshot it
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$QEMU_IMG snapshot -c foo "$TEST_IMG"
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# Write to the cluster
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$QEMU_IO -c 'write -P 23 0 64k' "$TEST_IMG" | _filter_qemu_io
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# Check metadata correctness
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_check_test_img
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# Check data correctness
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$QEMU_IO -c 'read -P 23 0 64k' "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG snapshot -a foo "$TEST_IMG"
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$QEMU_IO -c 'read -P 0 0 64k' "$TEST_IMG" | _filter_qemu_io
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_cleanup_test_img
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echo
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echo '=== Consecutive write to a preallocated zero cluster ==='
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echo
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_make_test_img 192k
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# Create three normal clusters
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$QEMU_IO -c 'write -P 42 0 192k' "$TEST_IMG" | _filter_qemu_io
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orig_map=$($QEMU_IMG map --output=json "$TEST_IMG")
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# Make the middle cluster a preallocated zero cluster
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$QEMU_IO -c 'write -z 64k 64k' "$TEST_IMG" | _filter_qemu_io
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# Try to overwrite everything: This should reuse the whole range. To test that
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# this only issues a single continuous write request, use blkdebug.
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$QEMU_IO -c 'write -P 42 0 192k' \
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"json:{
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'driver': '$IMGFMT',
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'file': {
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'driver': 'blkdebug',
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'image.filename': '$TEST_IMG',
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'set-state': [{
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'event': 'write_aio',
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'new_state': 2
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}],
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'inject-error': [{
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'event': 'write_aio',
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'state': 2
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}]
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}
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}" \
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| _filter_qemu_io
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# Check metadata correctness
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_check_test_img
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# Check that we have actually reused the original area
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new_map=$($QEMU_IMG map --output=json "$TEST_IMG")
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if [ "$new_map" = "$orig_map" ]; then
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echo 'Successfully reused original clusters.'
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else
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echo 'Failed to reuse original clusters.'
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echo 'Original map:'
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echo "$orig_map"
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echo 'New map:'
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echo "$new_map"
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fi
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_cleanup_test_img
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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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