Merge "libsnapshot: v3 structural changes" into main

    // monotonically increasing value used by update_engine

    uint64_t label;

    // Index of last CowOperation guaranteed to be resumable

    uint32_t op_index;

    uint64_t op_index;

} __attribute__((packed));

static constexpr uint8_t kNumResumePoints = 4;

    uint32_t resume_point_max;

    // Number of CowOperationV3 structs in the operation buffer, currently and total

    // region size.

    uint32_t op_count;

    uint32_t op_count_max;

    uint64_t op_count;

    uint64_t op_count_max;

    // Compression Algorithm

    uint32_t compression_algorithm;

    // Max compression size supported

    uint32_t max_compression_size;

} __attribute__((packed));

enum class CowOperationType : uint8_t {

struct CowOperationV3 {

    // If this operation reads from the data section of the COW, this contains

    // the length.

    uint16_t data_length;

    uint32_t data_length;

    // The block of data in the new image that this operation modifies.

    uint32_t new_block;