u16 csecs; /* sector size */
u16 sos; /* out-of-band area size */
bool ext; /* metadata in extended data buffer */
+ u32 mdts; /* Max data transfer size*/
/* device write constrains */
u32 ws_min; /* minimum write size */
char name[DISK_NAME_LEN];
void *private_data;
+ struct kref ref;
void *rmap;
struct mutex mlock;