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The patch adds some preparation parts for incompatible compression type
feature to qcow2 allowing the use different compression methods for
image clusters (de)compressing.
It is implied that the compression type is set on the image creation and
can be changed only later by image conversion, thus compression type
defines the only compression algorithm used for the image, and thus,
for all image clusters.
The goal of the feature is to add support of other compression methods
to qcow2. For example, ZSTD which is more effective on compression than ZLIB.
The default compression is ZLIB. Images created with ZLIB compression type
are backward compatible with older qemu versions.
Adding of the compression type breaks a number of tests because now the
compression type is reported on image creation and there are some changes
in the qcow2 header in size and offsets.
The tests are fixed in the following ways:
* filter out compression_type for many tests
* fix header size, feature table size and backing file offset
affected tests: 031, 036, 061, 080
header_size +=8: 1 byte compression type
7 bytes padding
feature_table += 48: incompatible feature compression type
backing_file_offset += 56 (8 + 48 -> header_change + feature_table_change)
* add "compression type" for test output matching when it isn't filtered
affected tests: 049, 060, 061, 065, 082, 085, 144, 182, 185, 198, 206,
242, 255, 274, 280
Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
QAPI part:
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200507082521.29210-2-dplotnikov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
45 lines
1.9 KiB
Plaintext
45 lines
1.9 KiB
Plaintext
QA output created by 036
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=== Image with unknown incompatible feature bit ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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incompatible_features [63]
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compatible_features []
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autoclear_features []
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): Unknown incompatible feature: 8000000000000000
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): Test feature
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=== Image with multiple incompatible feature bits ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): Unknown incompatible feature: e000000000000000
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): Test feature, Unknown incompatible feature: 6000000000000000
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): Test feature, Unknown incompatible feature: c000000000000000
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): test1, test2, Unknown incompatible feature: 8000000000000000
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): test1, test2, test3
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qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Unsupported IMGFMT feature(s): test2, Unknown incompatible feature: a000000000000000
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=== Create image with unknown autoclear feature bit ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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incompatible_features []
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compatible_features []
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autoclear_features [63]
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Header extension:
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magic 0x6803f857
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length 336
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data <binary>
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=== Repair image ===
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No errors were found on the image.
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incompatible_features []
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compatible_features []
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autoclear_features []
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Header extension:
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magic 0x6803f857
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length 336
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data <binary>
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*** done
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