Anatol Belski 771ab1d5a3 block: qcow: Add corrupt bit support for QCOW2 v3 images ...

Implement proper handling of the QCOW2 corrupt bit (incompatible feature
bit 1) according to the specification:

- Add Error::CorruptImage for rejecting writable opens of corrupt images
- Add CORRUPT to SUPPORTED features (handled specially, not rejected)
- Add QcowHeader::set_corrupt_bit() to mark images as corrupt
- Add QcowHeader::is_corrupt() helper method
- Reject writable opens of corrupt images with Error::CorruptImage
- Allow readonly opens of corrupt images with a warning

The corrupt bit indicates that image metadata may be inconsistent. Per
spec, such images must not be written to until repaired by external
tools like qemu-img. Read-only access is permitted to allow data
recovery.

Users can open corrupt images read-only using:
  --disk path=/path/to/image.qcow2,readonly=on

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

2026-01-28 15:30:33 +00:00

..

src

block: qcow: Add corrupt bit support for QCOW2 v3 images

2026-01-28 15:30:33 +00:00

Cargo.toml

block: qcow: Validate incompatible feature bits

2026-01-23 18:58:56 +00:00