#define RRD_READONLY (1<<0)
#define RRD_READWRITE (1<<1)
#define RRD_CREAT (1<<2)
#define RRD_READAHEAD (1<<3)
#define RRD_COPY (1<<4)
#define RRD_READONLY (1<<0)
#define RRD_READWRITE (1<<1)
#define RRD_CREAT (1<<2)
#define RRD_READAHEAD (1<<3)
#define RRD_COPY (1<<4)