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iotests: Add test for different refcount widths
Add a test for errors specific to certain widths (i.e. snapshots with refcount_bits=1). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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| #!/bin/bash | ||
| # | ||
| # Test cases for different refcount_bits values | ||
| # | ||
| # Copyright (C) 2015 Red Hat, Inc. | ||
| # | ||
| # This program is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation; either version 2 of the License, or | ||
| # (at your option) any later version. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| # | ||
|
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| # creator | ||
| owner=mreitz@redhat.com | ||
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| seq="$(basename $0)" | ||
| echo "QA output created by $seq" | ||
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| here="$PWD" | ||
| tmp=/tmp/$$ | ||
| status=1 # failure is the default! | ||
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| _cleanup() | ||
| { | ||
| _cleanup_test_img | ||
| } | ||
| trap "_cleanup; exit \$status" 0 1 2 3 15 | ||
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| # get standard environment, filters and checks | ||
| . ./common.rc | ||
| . ./common.filter | ||
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| # This tests qcow2-specific low-level functionality | ||
| _supported_fmt qcow2 | ||
| _supported_proto file | ||
| _supported_os Linux | ||
| # This test will set refcount_bits on its own which would conflict with the | ||
| # manual setting; compat will be overridden as well | ||
| _unsupported_imgopts refcount_bits 'compat=0.10' | ||
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| function print_refcount_bits() | ||
| { | ||
| $QEMU_IMG info "$TEST_IMG" | sed -n '/refcount bits:/ s/^ *//p' | ||
| } | ||
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| echo | ||
| echo '=== refcount_bits limits ===' | ||
| echo | ||
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| # Must be positive (non-zero) | ||
| IMGOPTS="$IMGOPTS,refcount_bits=0" _make_test_img 64M | ||
| # Must be positive (non-negative) | ||
| IMGOPTS="$IMGOPTS,refcount_bits=-1" _make_test_img 64M | ||
| # May not exceed 64 | ||
| IMGOPTS="$IMGOPTS,refcount_bits=128" _make_test_img 64M | ||
| # Must be a power of two | ||
| IMGOPTS="$IMGOPTS,refcount_bits=42" _make_test_img 64M | ||
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| # 1 is the minimum | ||
| IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M | ||
| print_refcount_bits | ||
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| # 64 is the maximum | ||
| IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M | ||
| print_refcount_bits | ||
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| # 16 is the default | ||
| _make_test_img 64M | ||
| print_refcount_bits | ||
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| echo | ||
| echo '=== refcount_bits and compat=0.10 ===' | ||
| echo | ||
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| # Should work | ||
| IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=16" _make_test_img 64M | ||
| print_refcount_bits | ||
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| # Should not work | ||
| IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=1" _make_test_img 64M | ||
| IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=64" _make_test_img 64M | ||
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| echo | ||
| echo '=== Snapshot limit on refcount_bits=1 ===' | ||
| echo | ||
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| IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M | ||
| print_refcount_bits | ||
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| $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io | ||
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| # Should fail for now; in the future, this might be supported by automatically | ||
| # copying all clusters with overflowing refcount | ||
| $QEMU_IMG snapshot -c foo "$TEST_IMG" | ||
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| # The new L1 table could/should be leaked | ||
| _check_test_img | ||
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| echo | ||
| echo '=== Snapshot limit on refcount_bits=2 ===' | ||
| echo | ||
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| IMGOPTS="$IMGOPTS,refcount_bits=2" _make_test_img 64M | ||
| print_refcount_bits | ||
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| $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io | ||
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| # Should succeed | ||
| $QEMU_IMG snapshot -c foo "$TEST_IMG" | ||
| $QEMU_IMG snapshot -c bar "$TEST_IMG" | ||
| # Should fail (4th reference) | ||
| $QEMU_IMG snapshot -c baz "$TEST_IMG" | ||
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| # The new L1 table could/should be leaked | ||
| _check_test_img | ||
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| echo | ||
| echo '=== Compressed clusters with refcount_bits=1 ===' | ||
| echo | ||
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| IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M | ||
| print_refcount_bits | ||
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| # Both should fit into a single host cluster; instead of failing to increase the | ||
| # refcount of that cluster, qemu should just allocate a new cluster and make | ||
| # this operation succeed | ||
| $QEMU_IO -c 'write -P 0 -c 0 64k' \ | ||
| -c 'write -P 1 -c 64k 64k' \ | ||
| "$TEST_IMG" | _filter_qemu_io | ||
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| _check_test_img | ||
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| echo | ||
| echo '=== MSb set in 64 bit refcount ===' | ||
| echo | ||
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| IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M | ||
| print_refcount_bits | ||
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| $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io | ||
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| # Set the MSb in the refblock entry of the data cluster | ||
| poke_file "$TEST_IMG" $((0x20028)) "\x80\x00\x00\x00\x00\x00\x00\x00" | ||
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| # Clear OFLAG_COPIED in the L2 entry of the data cluster | ||
| poke_file "$TEST_IMG" $((0x40000)) "\x00\x00\x00\x00\x00\x05\x00\x00" | ||
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| # Try to write to that cluster (should work, even though the MSb is set) | ||
| $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io | ||
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| echo | ||
| echo '=== Snapshot on maximum 64 bit refcount value ===' | ||
| echo | ||
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| IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M | ||
| print_refcount_bits | ||
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| $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io | ||
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| # Set the refblock entry to the maximum value possible | ||
| poke_file "$TEST_IMG" $((0x20028)) "\xff\xff\xff\xff\xff\xff\xff\xff" | ||
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| # Clear OFLAG_COPIED in the L2 entry of the data cluster | ||
| poke_file "$TEST_IMG" $((0x40000)) "\x00\x00\x00\x00\x00\x05\x00\x00" | ||
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| # Try a snapshot (should correctly identify the overflow; may work in the future | ||
| # by falling back to COW) | ||
| $QEMU_IMG snapshot -c foo "$TEST_IMG" | ||
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| # The new L1 table could/should be leaked; and obviously the data cluster is | ||
| # leaked (refcount=UINT64_MAX reference=1) | ||
| _check_test_img | ||
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| # success, all done | ||
| echo '*** done' | ||
| rm -f $seq.full | ||
| status=0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| QA output created by 112 | ||
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| === refcount_bits limits === | ||
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| qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 refcount_bits=-1 | ||
| qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 1 | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 64 | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 16 | ||
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| === refcount_bits and compat=0.10 === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 16 | ||
| qemu-img: TEST_DIR/t.IMGFMT: Different refcount widths than 16 bits require compatibility level 1.1 or above (use compat=1.1 or greater) | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| qemu-img: TEST_DIR/t.IMGFMT: Different refcount widths than 16 bits require compatibility level 1.1 or above (use compat=1.1 or greater) | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
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| === Snapshot limit on refcount_bits=1 === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 1 | ||
| wrote 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| qemu-img: Could not create snapshot 'foo': -22 (Invalid argument) | ||
| Leaked cluster 6 refcount=1 reference=0 | ||
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| 1 leaked clusters were found on the image. | ||
| This means waste of disk space, but no harm to data. | ||
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| === Snapshot limit on refcount_bits=2 === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 2 | ||
| wrote 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| qemu-img: Could not create snapshot 'baz': -22 (Invalid argument) | ||
| Leaked cluster 7 refcount=1 reference=0 | ||
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| 1 leaked clusters were found on the image. | ||
| This means waste of disk space, but no harm to data. | ||
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| === Compressed clusters with refcount_bits=1 === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 1 | ||
| wrote 65536/65536 bytes at offset 0 | ||
| 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 65536/65536 bytes at offset 65536 | ||
| 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| No errors were found on the image. | ||
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| === MSb set in 64 bit refcount === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 64 | ||
| wrote 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
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| === Snapshot on maximum 64 bit refcount value === | ||
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| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 | ||
| refcount bits: 64 | ||
| wrote 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| qemu-img: Could not create snapshot 'foo': -22 (Invalid argument) | ||
| Leaked cluster 5 refcount=18446744073709551615 reference=1 | ||
| Leaked cluster 6 refcount=1 reference=0 | ||
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| 2 leaked clusters were found on the image. | ||
| This means waste of disk space, but no harm to data. | ||
| *** done |
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