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.
v2: - Generally implemented Kevin's comments, especially: - new QMP event QEVENT_BLOCK_IMAGE_CORRUPTED - removed BDRV_O_REPAIR in favor of BDRV_O_CHECK | BDRV_O_RDWR - always check full clusters for overlaps - removed qcow2_check_allocations in favor of some qcow2_check_refcounts extensions that will hopefully include all that functionality Max Reitz (5): qcow2: Add corrupt bit qcow2: Metadata overlap checks qcow2: Employ metadata overlap checks qcow2: More complete consistency check qemu-iotests: Overlapping cluster allocations block/qcow2-cache.c | 17 ++ block/qcow2-cluster.c | 25 ++- block/qcow2-refcount.c | 397 +++++++++++++++++++++++++++++++++++++++++---- block/qcow2-snapshot.c | 22 +++ block/qcow2.c | 87 +++++++++- block/qcow2.h | 36 +++- docs/specs/qcow2.txt | 7 +- include/block/block.h | 1 + include/monitor/monitor.h | 1 + monitor.c | 1 + tests/qemu-iotests/031.out | 12 +- tests/qemu-iotests/036.out | 2 +- tests/qemu-iotests/060 | 111 +++++++++++++ tests/qemu-iotests/060.out | 37 +++++ tests/qemu-iotests/group | 1 + 15 files changed, 708 insertions(+), 49 deletions(-) create mode 100755 tests/qemu-iotests/060 create mode 100644 tests/qemu-iotests/060.out -- 1.8.3.1
