If a qcow2 image file becomes corrupted, any write may inadvertently overwrite important metadata structures such as the L1 table. This series adds functionality for detecting, preventing and (to some extent) repairing such collisions.
Max Reitz (5): qcow2: Add corrupt bit qcow2: Metadata overlap checks qcow2: Employ metadata overlap checks qcow2: Check allocations in qcow2_check qemu-iotests: Overlapping cluster allocations block/qcow2-cache.c | 17 +++++ block/qcow2-cluster.c | 437 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ block/qcow2-refcount.c | 142 ++++++++++++++++++++++++++++++++++++++ block/qcow2-snapshot.c | 24 +++++++ block/qcow2.c | 97 +++++++++++++++++++++++++- block/qcow2.h | 37 +++++++++- docs/specs/qcow2.txt | 7 +- include/block/block.h | 2 + qemu-img.c | 2 +- tests/qemu-iotests/031.out | 12 ++-- tests/qemu-iotests/036.out | 2 +- tests/qemu-iotests/060 | 107 +++++++++++++++++++++++++++++ tests/qemu-iotests/060.out | 43 ++++++++++++ tests/qemu-iotests/group | 1 + 14 files changed, 917 insertions(+), 13 deletions(-) create mode 100755 tests/qemu-iotests/060 create mode 100644 tests/qemu-iotests/060.out
