Commit ef083f61 authored by Alberto Garcia's avatar Alberto Garcia Committed by Max Reitz
Browse files

qcow2: Add iotest for an empty refcount table 



This patch adds a simple iotest in which we try to write to an image
with an empty refcount table (i.e. with all entries set to 0).

This scenario was already handled by the existing consistency checks,
but we add an explicit test case for completeness.

Signed-off-by: default avatarAlberto Garcia <berto@igalia.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Message-id: 7e48b0e2ae1a0a18e0ee303b3045f130feec0474.1509718618.git.berto@igalia.com
Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
parent 5a45da5e

tests/qemu-iotests/060

+7 −0
Original line number Diff line number Diff line
@@ -242,6 +242,13 @@ poke_file "$TEST_IMG" "$(($l2_offset+8))" "\x80\x00\x00\x00\x00\x06\x2a\x00" 
# Should emit two error messages

$QEMU_IO -c "discard 0 64k" -c "read 64k 64k" "$TEST_IMG" | _filter_qemu_io



echo

echo "=== Testing empty refcount table ==="

echo

_make_test_img 64M

poke_file "$TEST_IMG" "$rt_offset"        "\x00\x00\x00\x00\x00\x00\x00\x00"

$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io



echo

echo "=== Testing empty refcount table with valid L1 and L2 tables ==="

echo

tests/qemu-iotests/060.out

+6 −0
Original line number Diff line number Diff line
@@ -182,6 +182,12 @@ discard 65536/65536 bytes at offset 0 
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

read failed: Input/output error



=== Testing empty refcount table ===



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

qcow2: Marking image as corrupt: Preventing invalid write on metadata (overlaps with refcount table); further corruption events will be suppressed

write failed: Input/output error



=== Testing empty refcount table with valid L1 and L2 tables ===



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