Commit 2ecec911 authored by Alberto Garcia's avatar Alberto Garcia Committed by Max Reitz
Browse files

iotests: Test downgrading an image using a small L2 slice size 



expand_zero_clusters_in_l1() is used when downgrading qcow2 images
from v3 to v2 (compat=0.10). This is one of the functions that needed
more changes to support L2 slices, so this patch extends iotest 061 to
test downgrading a qcow2 image using a smaller slice size.

Signed-off-by: default avatarAlberto Garcia <berto@igalia.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Message-id: 3e5662dce5e4926c8fabbad4c0b9142b2a506dd4.1517840877.git.berto@igalia.com
Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
parent 4450c396

tests/qemu-iotests/061

+16 −0
Original line number Diff line number Diff line
@@ -53,6 +53,22 @@ $PYTHON qcow2.py "$TEST_IMG" dump-header 
$QEMU_IO -c "read -P 0 0 128k" "$TEST_IMG" | _filter_qemu_io

_check_test_img



echo

echo "=== Testing version downgrade with zero expansion and 4K cache entries ==="

echo

IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M

$QEMU_IO -c "write -z 0 128k" "$TEST_IMG" | _filter_qemu_io

$QEMU_IO -c "write -z 32M 128k" "$TEST_IMG" | _filter_qemu_io

$QEMU_IO -c map "$TEST_IMG" | _filter_qemu_io

$PYTHON qcow2.py "$TEST_IMG" dump-header

$QEMU_IMG amend -o "compat=0.10" --image-opts \

          driver=qcow2,file.filename=$TEST_IMG,l2-cache-entry-size=4096

$PYTHON qcow2.py "$TEST_IMG" dump-header

$QEMU_IO -c "read -P 0 0 128k" "$TEST_IMG" | _filter_qemu_io

$QEMU_IO -c "read -P 0 32M 128k" "$TEST_IMG" | _filter_qemu_io

$QEMU_IO -c map "$TEST_IMG" | _filter_qemu_io

_check_test_img



echo

echo "=== Testing dirty version downgrade ==="

echo

tests/qemu-iotests/061.out

+61 −0
Original line number Diff line number Diff line
@@ -52,6 +52,67 @@ read 131072/131072 bytes at offset 0 
128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

No errors were found on the image.



=== Testing version downgrade with zero expansion and 4K cache entries ===



Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864

wrote 131072/131072 bytes at offset 0

128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

wrote 131072/131072 bytes at offset 33554432

128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

128 KiB (0x20000) bytes     allocated at offset 0 bytes (0x0)

31.875 MiB (0x1fe0000) bytes not allocated at offset 128 KiB (0x20000)

128 KiB (0x20000) bytes     allocated at offset 32 MiB (0x2000000)

31.875 MiB (0x1fe0000) bytes not allocated at offset 32.125 MiB (0x2020000)

magic                     0x514649fb

version                   3

backing_file_offset       0x0

backing_file_size         0x0

cluster_bits              16

size                      67108864

crypt_method              0

l1_size                   1

l1_table_offset           0x30000

refcount_table_offset     0x10000

refcount_table_clusters   1

nb_snapshots              0

snapshot_offset           0x0

incompatible_features     0x0

compatible_features       0x1

autoclear_features        0x0

refcount_order            4

header_length             104



Header extension:

magic                     0x6803f857

length                    144

data                      <binary>



magic                     0x514649fb

version                   2

backing_file_offset       0x0

backing_file_size         0x0

cluster_bits              16

size                      67108864

crypt_method              0

l1_size                   1

l1_table_offset           0x30000

refcount_table_offset     0x10000

refcount_table_clusters   1

nb_snapshots              0

snapshot_offset           0x0

incompatible_features     0x0

compatible_features       0x0

autoclear_features        0x0

refcount_order            4

header_length             72



read 131072/131072 bytes at offset 0

128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

read 131072/131072 bytes at offset 33554432

128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

64 MiB (0x4000000) bytes not allocated at offset 0 bytes (0x0)

No errors were found on the image.



=== Testing dirty version downgrade ===



Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864