3be2024aef
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20191107163708.833192-22-mreitz@redhat.com [mreitz: Also disable 273] Signed-off-by: Max Reitz <mreitz@redhat.com>
178 lines
6.2 KiB
Bash
Executable File
178 lines
6.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Commit changes into backing chains and empty the top image if the
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# backing image is not explicitly specified.
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#
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# Variant of 097, which includes snapshots and persistent bitmaps, to
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# tickle the slow codepath in qcow2. See also 198, for another feature
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# that tickles the slow codepath.
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#
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# Copyright (C) 2014, 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=mreitz@redhat.com
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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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_rm_test_img "$TEST_IMG.itmd"
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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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. ./common.pattern
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# This test is specific to qcow2
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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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# Persistent dirty bitmaps require compat=1.1;
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# Internal snapshots forbid using an external data file
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# (they work with refcount_bits=1 here, though, because there actually
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# is no data when creating the snapshot)
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_unsupported_imgopts 'compat=0.10' data_file
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run_qemu()
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{
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$QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \
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| _filter_testdir | _filter_qmp | _filter_qemu \
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| sed 's/"sha256": ".\{64\}"/"sha256": HASH/'
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}
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for reason in snapshot bitmap; do
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# Four passes:
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# 0: Two-layer backing chain, commit to upper backing file (implicitly)
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# (in this case, the top image will be emptied)
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# 1: Two-layer backing chain, commit to upper backing file (explicitly)
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# (in this case, the top image will implicitly stay unchanged)
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# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
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# (in this case, the top image will explicitly stay unchanged)
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# 3: Two-layer backing chain, commit to lower backing file
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# (in this case, the top image will implicitly stay unchanged)
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#
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# 020 already tests committing, so this only tests whether image chains are
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# working properly and that all images above the base are emptied; therefore,
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# no complicated patterns are necessary. Check near the 2G mark, as qcow2
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# has been buggy at that boundary in the past.
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for i in 0 1 2 3; do
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echo
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echo "=== Test pass $reason.$i ==="
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echo
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len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned
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TEST_IMG="$TEST_IMG.base" _make_test_img $len
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TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len
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_make_test_img -b "$TEST_IMG.itmd" $len
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# Update the top image to use a feature that is incompatible with fast path
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case $reason in
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snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;;
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bitmap)
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run_qemu <<EOF
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{ "execute": "qmp_capabilities" }
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{ "execute": "blockdev-add",
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"arguments": { "driver": "qcow2", "node-name": "drive0",
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"file": { "driver": "file", "filename": "$TEST_IMG" } } }
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{ "execute": "block-dirty-bitmap-add",
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"arguments": { "node": "drive0", "name": "bitmap0",
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"persistent": true } }
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{ "execute": "quit" }
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EOF
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;;
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esac
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$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io
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if [ $i -lt 3 ]; then
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if [ $i == 0 ]; then
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# -b "$TEST_IMG.itmd" should be the default (that is, committing to the
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# first backing file in the chain)
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$QEMU_IMG commit "$TEST_IMG"
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elif [ $i == 1 ]; then
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# explicitly specify the commit target (this should imply -d)
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$QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
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else
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# do not explicitly specify the commit target, but use -d to leave the
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# top image unchanged
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$QEMU_IMG commit -d "$TEST_IMG"
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fi
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# Bottom should be unchanged
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$QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
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# Intermediate should contain changes from top
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$QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io
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# And in pass 0, the top image should be empty, whereas in both other passes
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# it should be unchanged (which is both checked by qemu-img map)
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else
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$QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
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# Bottom should contain all changes
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$QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
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# Both top and intermediate should be unchanged
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fi
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$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
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$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
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$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
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# Check that the reason for slow path is still present, as appropriate
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case $reason in
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snapshot)
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$QEMU_IMG snapshot -l "$TEST_IMG" |
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sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;;
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bitmap)
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run_qemu <<EOF
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{ "execute": "qmp_capabilities" }
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{ "execute": "blockdev-add",
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"arguments": { "driver": "qcow2", "node-name": "drive0",
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"file": { "driver": "file", "filename": "$TEST_IMG" } } }
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{ "execute": "x-debug-block-dirty-bitmap-sha256",
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"arguments": { "node": "drive0", "name": "bitmap0" } }
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{ "execute": "quit" }
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EOF
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;;
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esac
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done
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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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