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42a5009d88
Quite a few of these tests have stale contact information. This patch updates the stale ones that I happen to be aware of at the moment. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20220322174212.1169630-1-jsnow@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
492 lines
16 KiB
Bash
Executable file
492 lines
16 KiB
Bash
Executable file
#!/usr/bin/env bash
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# group: rw auto quick
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#
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# Test case for image corruption (overlapping data structures) 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=hreitz@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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# Sometimes the error line might be dumped before/after an event
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# randomly. Mask it out for specific test that may trigger this
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# uncertainty for current test for now.
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_filter_io_error()
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{
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sed '/Input\/output error/d'
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}
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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 qcow2-specific low-level functionality
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_supported_fmt qcow2
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_supported_proto file fuse
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_supported_os Linux
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# These tests only work for compat=1.1 images without an external
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# data file with refcount_bits=16
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_unsupported_imgopts 'compat=0.10' data_file \
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'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
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# The repair process will create a large file - so check for availability first
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_require_large_file 64G
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rt_offset=65536 # 0x10000 (XXX: just an assumption)
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rb_offset=131072 # 0x20000 (XXX: just an assumption)
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l1_offset=196608 # 0x30000 (XXX: just an assumption)
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l2_offset=262144 # 0x40000 (XXX: just an assumption)
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l2_offset_after_snapshot=524288 # 0x80000 (XXX: just an assumption)
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OPEN_RW="open -o overlap-check=all $TEST_IMG"
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# Overlap checks are done before write operations only, therefore opening an
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# image read-only makes the overlap-check option irrelevant
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OPEN_RO="open -r $TEST_IMG"
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echo
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echo "=== Testing L2 reference into L1 ==="
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echo
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_make_test_img 64M
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# Link first L1 entry (first L2 table) onto itself
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# (Note the MSb in the L1 entry is set, ensuring the refcount is one - else any
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# later write will result in a COW operation, effectively ruining this attempt
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# on image corruption)
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poke_file "$TEST_IMG" "$l1_offset" "\x80\x00\x00\x00\x00\x03\x00\x00"
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_check_test_img
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# The corrupt bit should not be set anyway
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_qcow2_dump_header | grep incompatible_features
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# Try to write something, thereby forcing the corrupt bit to be set
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$QEMU_IO -c "$OPEN_RW" -c "write -P 0x2a 0 512" | _filter_qemu_io
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# The corrupt bit must now be set
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_qcow2_dump_header | grep incompatible_features
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# This information should be available through qemu-img info
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_img_info --format-specific
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# Try to open the image R/W (which should fail)
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$QEMU_IO -c "$OPEN_RW" -c "read 0 512" 2>&1 | _filter_qemu_io \
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| _filter_testdir \
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| _filter_imgfmt
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# Try to open it RO (which should succeed)
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$QEMU_IO -c "$OPEN_RO" -c "read 0 512" | _filter_qemu_io
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# We could now try to fix the image, but this would probably fail (how should an
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# L2 table linked onto the L1 table be fixed?)
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echo
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echo "=== Testing cluster data reference into refcount block ==="
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echo
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_make_test_img 64M
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# Allocate L2 table
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truncate -s "$(($l2_offset+65536))" "$TEST_IMG"
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poke_file "$TEST_IMG" "$l1_offset" "\x80\x00\x00\x00\x00\x04\x00\x00"
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# Mark cluster as used
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poke_file "$TEST_IMG" "$(($rb_offset+8))" "\x00\x01"
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# Redirect new data cluster onto refcount block
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x02\x00\x00"
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_check_test_img
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_qcow2_dump_header | grep incompatible_features
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$QEMU_IO -c "$OPEN_RW" -c "write -P 0x2a 0 512" | _filter_qemu_io
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_qcow2_dump_header | grep incompatible_features
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# Try to fix it
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_check_test_img -r all
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# The corrupt bit should be cleared
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_qcow2_dump_header | grep incompatible_features
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# Look if it's really really fixed
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$QEMU_IO -c "$OPEN_RW" -c "write -P 0x2a 0 512" | _filter_qemu_io
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_qcow2_dump_header | grep incompatible_features
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echo
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echo "=== Testing cluster data reference into inactive L2 table ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "$OPEN_RW" -c "write -P 1 0 512" | _filter_qemu_io
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$QEMU_IMG snapshot -c foo "$TEST_IMG"
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$QEMU_IO -c "$OPEN_RW" -c "write -P 2 0 512" | _filter_qemu_io
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# The inactive L2 table remains at its old offset
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poke_file "$TEST_IMG" "$l2_offset_after_snapshot" \
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"\x80\x00\x00\x00\x00\x04\x00\x00"
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_check_test_img
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_qcow2_dump_header | grep incompatible_features
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$QEMU_IO -c "$OPEN_RW" -c "write -P 3 0 512" | _filter_qemu_io
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_qcow2_dump_header | grep incompatible_features
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_check_test_img -r all
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_qcow2_dump_header | grep incompatible_features
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$QEMU_IO -c "$OPEN_RW" -c "write -P 4 0 512" | _filter_qemu_io
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_qcow2_dump_header | grep incompatible_features
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# Check data
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$QEMU_IO -c "$OPEN_RO" -c "read -P 4 0 512" | _filter_qemu_io
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$QEMU_IMG snapshot -a foo "$TEST_IMG"
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_check_test_img
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$QEMU_IO -c "$OPEN_RO" -c "read -P 1 0 512" | _filter_qemu_io
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echo
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echo "=== Testing overlap while COW is in flight ==="
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echo
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BACKING_IMG=$TEST_IMG.base
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TEST_IMG=$BACKING_IMG _make_test_img 1G
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$QEMU_IO -c 'write 0k 64k' "$BACKING_IMG" | _filter_qemu_io
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_make_test_img -b "$BACKING_IMG" -F $IMGFMT 1G
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# Write two clusters, the second one enforces creation of an L2 table after
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# the first data cluster.
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$QEMU_IO -c 'write 0k 64k' -c 'write 512M 64k' "$TEST_IMG" | _filter_qemu_io
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# Free the first cluster. This cluster will soon enough be reallocated and
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# used for COW.
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poke_file "$TEST_IMG" "$l2_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
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poke_file "$TEST_IMG" "$(($rb_offset+10))" "\x00\x00"
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# Now, corrupt the image by marking the second L2 table cluster as free.
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poke_file "$TEST_IMG" "$(($rb_offset+12))" "\x00\x00"
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# Start a write operation requiring COW on the image stopping it right before
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# doing the read; then, trigger the corruption prevention by writing anything to
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# any unallocated cluster, leading to an attempt to overwrite the second L2
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# table. Finally, resume the COW write and see it fail (but not crash).
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echo "open -o file.driver=blkdebug $TEST_IMG
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break cow_read 0
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aio_write 0k 1k
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wait_break 0
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write 64k 64k
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resume 0" | $QEMU_IO | _filter_qemu_io
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echo
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echo "=== Testing unallocated image header ==="
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echo
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_make_test_img 64M
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# Create L1/L2
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$rb_offset" "\x00\x00"
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$QEMU_IO -c "write 64k 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing unaligned L1 entry ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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# This will be masked with ~(512 - 1) = ~0x1ff, so whether the lower 9 bits are
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# aligned or not does not matter
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poke_file "$TEST_IMG" "$l1_offset" "\x80\x00\x00\x00\x00\x04\x2a\x00"
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$QEMU_IO -c "read 0 64k" "$TEST_IMG" | _filter_qemu_io
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# Test how well zero cluster expansion can cope with this
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l1_offset" "\x80\x00\x00\x00\x00\x04\x2a\x00"
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$QEMU_IMG amend -o compat=0.10 "$TEST_IMG"
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echo
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echo "=== Testing unaligned L2 entry ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x05\x2a\x00"
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$QEMU_IO -c "read 0 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing unaligned pre-allocated zero cluster ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x05\x2a\x01"
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# zero cluster expansion
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$QEMU_IMG amend -o compat=0.10 "$TEST_IMG"
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echo
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echo "=== Testing unaligned reftable entry ==="
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echo
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_make_test_img 64M
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poke_file "$TEST_IMG" "$rt_offset" "\x00\x00\x00\x00\x00\x02\x2a\x00"
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing non-fatal corruption on freeing ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x05\x2a\x00"
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$QEMU_IO -c "discard 0 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing read-only corruption report ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x05\x2a\x00"
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# Should only emit a single error message
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$QEMU_IO -c "$OPEN_RO" -c "read 0 64k" -c "read 0 64k" | _filter_qemu_io
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echo
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echo "=== Testing non-fatal and then fatal corruption report ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 128k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x05\x2a\x00"
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poke_file "$TEST_IMG" "$(($l2_offset+8))" "\x80\x00\x00\x00\x00\x06\x2a\x00"
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# Should emit two error messages
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$QEMU_IO -c "discard 0 64k" -c "read 64k 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing empty refcount table ==="
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echo
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_make_test_img 64M
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poke_file "$TEST_IMG" "$rt_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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# Repair the image
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_check_test_img -r all
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echo
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echo "=== Testing empty refcount table with valid L1 and L2 tables ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$rt_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
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# Since the first data cluster is already allocated this triggers an
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# allocation with an explicit offset (using qcow2_alloc_clusters_at())
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# causing a refcount block to be allocated at offset 0
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$QEMU_IO -c "write 0 128k" "$TEST_IMG" | _filter_qemu_io
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# Repair the image
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_check_test_img -r all
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echo
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echo "=== Testing empty refcount block ==="
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echo
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_make_test_img 64M
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poke_file "$TEST_IMG" "$rb_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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# Repair the image
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_check_test_img -r all
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echo
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echo "=== Testing empty refcount block with compressed write ==="
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 64k 64k" "$TEST_IMG" | _filter_qemu_io
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poke_file "$TEST_IMG" "$rb_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
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# The previous write already allocated an L2 table, so now this new
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# write will try to allocate a compressed data cluster at offset 0.
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$QEMU_IO -c "write -c 0k 64k" "$TEST_IMG" | _filter_qemu_io
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# Repair the image
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_check_test_img -r all
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echo
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echo "=== Testing zero refcount table size ==="
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echo
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_make_test_img 64M
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poke_file "$TEST_IMG" "56" "\x00\x00\x00\x00"
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" 2>&1 | _filter_testdir | _filter_imgfmt
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# Repair the image
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_check_test_img -r all
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echo
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echo "=== Testing incorrect refcount table offset ==="
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echo
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_make_test_img 64M
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poke_file "$TEST_IMG" "48" "\x00\x00\x00\x00\x00\x00\x00\x00"
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Testing dirty corrupt image ==="
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echo
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_make_test_img 64M
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# Let the refblock appear unaligned
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poke_file "$TEST_IMG" "$rt_offset" "\x00\x00\x00\x00\xff\xff\x2a\x00"
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# Mark the image dirty, thus forcing an automatic check when opening it
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$PYTHON qcow2.py "$TEST_IMG" set-feature-bit incompatible 0
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# Open the image (qemu should refuse to do so)
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$QEMU_IO -c close "$TEST_IMG" 2>&1 | _filter_testdir | _filter_imgfmt
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echo '--- Repairing ---'
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# The actual repair should have happened (because of the dirty bit),
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# but some cleanup may have failed (like freeing the old reftable)
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# because the image was already marked corrupt by that point
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_check_test_img -r all
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echo
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echo "=== Writing to an unaligned preallocated zero cluster ==="
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echo
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_make_test_img 64M
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# Allocate the L2 table
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$QEMU_IO -c "write 0 64k" -c "discard 0 64k" "$TEST_IMG" | _filter_qemu_io
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# Pretend there is a preallocated zero cluster somewhere inside the
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# image header
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poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x00\x2a\x01"
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# Let's write to it!
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$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
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echo '--- Repairing ---'
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_check_test_img -r all
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echo
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echo '=== Discarding with an unaligned refblock ==='
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echo
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_make_test_img 64M
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$QEMU_IO -c "write 0 128k" "$TEST_IMG" | _filter_qemu_io
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# Make our refblock unaligned
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poke_file "$TEST_IMG" "$(($rt_offset))" "\x00\x00\x00\x00\x00\x00\x2a\x00"
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# Now try to discard something that will be submitted as two requests
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# (main part + tail)
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$QEMU_IO -c "discard 0 65537" "$TEST_IMG"
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echo '--- Repairing ---'
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# Fails the first repair because the corruption prevents the check
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# function from double-checking
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# (Using -q for the first invocation, because otherwise the
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# double-check error message appears above the summary for some
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# reason -- so let's just hide the summary)
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_check_test_img -q -r all
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_check_test_img -r all
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echo
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echo "=== Discarding an out-of-bounds refblock ==="
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echo
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_make_test_img 64M
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# Pretend there's a refblock really up high
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poke_file "$TEST_IMG" "$(($rt_offset+8))" "\x00\xff\xff\xff\x00\x00\x00\x00"
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# Let's try to shrink the qcow2 image so that the block driver tries
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# to discard that refblock (and see what happens!)
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$QEMU_IMG resize --shrink "$TEST_IMG" 32M
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echo '--- Checking and retrying ---'
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# Image should not be resized
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_img_info | grep 'virtual size'
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# But it should pass this check, because the "partial" resize has
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# already overwritten refblocks past the end
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_check_test_img -r all
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# So let's try again
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$QEMU_IMG resize --shrink "$TEST_IMG" 32M
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_img_info | grep 'virtual size'
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echo
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echo "=== Discarding a non-covered in-bounds refblock ==="
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echo
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_make_test_img -o 'refcount_bits=1' 64M
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# Pretend there's a refblock somewhere where there is no refblock to
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# cover it (but the covering refblock has a valid index in the
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# reftable)
|
|
# Every refblock covers 65536 * 8 * 65536 = 32 GB, so we have to point
|
|
# to 0x10_0000_0000 (64G) to point to the third refblock
|
|
poke_file "$TEST_IMG" "$(($rt_offset+8))" "\x00\x00\x00\x10\x00\x00\x00\x00"
|
|
$QEMU_IMG resize --shrink "$TEST_IMG" 32M
|
|
|
|
echo '--- Checking and retrying ---'
|
|
# Image should not be resized
|
|
_img_info | grep 'virtual size'
|
|
# But it should pass this check, because the "partial" resize has
|
|
# already overwritten refblocks past the end
|
|
_check_test_img -r all
|
|
# So let's try again
|
|
$QEMU_IMG resize --shrink "$TEST_IMG" 32M
|
|
_img_info | grep 'virtual size'
|
|
|
|
echo
|
|
echo "=== Discarding a refblock covered by an unaligned refblock ==="
|
|
echo
|
|
|
|
_make_test_img -o 'refcount_bits=1' 64M
|
|
|
|
# Same as above
|
|
poke_file "$TEST_IMG" "$(($rt_offset+8))" "\x00\x00\x00\x10\x00\x00\x00\x00"
|
|
# But now we actually "create" an unaligned third refblock
|
|
poke_file "$TEST_IMG" "$(($rt_offset+16))" "\x00\x00\x00\x00\x00\x00\x02\x00"
|
|
$QEMU_IMG resize --shrink "$TEST_IMG" 32M
|
|
|
|
echo '--- Repairing ---'
|
|
# Fails the first repair because the corruption prevents the check
|
|
# function from double-checking
|
|
# (Using -q for the first invocation, because otherwise the
|
|
# double-check error message appears above the summary for some
|
|
# reason -- so let's just hide the summary)
|
|
_check_test_img -q -r all
|
|
_check_test_img -r all
|
|
|
|
echo
|
|
echo "=== Testing the QEMU shutdown with a corrupted image ==="
|
|
echo
|
|
_make_test_img 64M
|
|
poke_file "$TEST_IMG" "$rt_offset" "\x00\x00\x00\x00\x00\x00\x00\x00"
|
|
echo "{'execute': 'qmp_capabilities'}
|
|
{'execute': 'human-monitor-command',
|
|
'arguments': {'command-line': 'qemu-io drive \"write 0 512\"'}}
|
|
{'execute': 'quit'}" \
|
|
| $QEMU -qmp stdio -nographic -nodefaults \
|
|
-drive if=none,node-name=drive,file="$TEST_IMG",driver=qcow2 \
|
|
| _filter_qmp | _filter_qemu_io
|
|
|
|
echo
|
|
echo "=== Testing incoming inactive corrupted image ==="
|
|
echo
|
|
|
|
_make_test_img 64M
|
|
# Create an unaligned L1 entry, so qemu will signal a corruption when
|
|
# reading from the covered area
|
|
poke_file "$TEST_IMG" "$l1_offset" "\x00\x00\x00\x00\x2a\x2a\x2a\x2a"
|
|
|
|
# Inactive images are effectively read-only images, so this should be a
|
|
# non-fatal corruption (which does not modify the image)
|
|
echo "{'execute': 'qmp_capabilities'}
|
|
{'execute': 'human-monitor-command',
|
|
'arguments': {'command-line': 'qemu-io drive \"read 0 512\"'}}
|
|
{'execute': 'quit'}" \
|
|
| $QEMU -qmp stdio -nographic -nodefaults \
|
|
-blockdev "{'node-name': 'drive',
|
|
'driver': 'qcow2',
|
|
'file': {
|
|
'driver': 'file',
|
|
'filename': '$TEST_IMG'
|
|
}}" \
|
|
-incoming exec:'cat /dev/null' \
|
|
2>&1 \
|
|
| _filter_qmp | _filter_qemu_io | _filter_io_error
|
|
|
|
echo
|
|
# Image should not have been marked corrupt
|
|
_img_info --format-specific | grep 'corrupt:'
|
|
|
|
# success, all done
|
|
echo "*** done"
|
|
rm -f $seq.full
|
|
status=0
|