8cedcffdc1
Bash allows functions to be declared with or without the leading keyword 'function'; but including the keyword does not comply with POSIX syntax, and is confusing to ksh users where the use of the keyword changes the scoping rules for functions. Stick to the POSIX form through iotests. Done mechanically with: sed -i 's/^function //' $(git ls-files tests/qemu-iotests) Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20181116215002.2124581-1-eblake@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
175 lines
6.0 KiB
Bash
Executable File
175 lines
6.0 KiB
Bash
Executable File
#!/bin/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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_unsupported_imgopts 'compat=0.10'
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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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