#define EXT2_FLAG_RW                    0x01
#define EXT2_FLAG_CHANGED               0x02
#define EXT2_FLAG_DIRTY                 0x04
#define EXT2_FLAG_VALID                 0x08
#define EXT2_FLAG_IB_DIRTY              0x10
#define EXT2_FLAG_BB_DIRTY              0x20
#define EXT2_FLAG_SWAP_BYTES            0x40
#define EXT2_FLAG_SWAP_BYTES_READ       0x80
#define EXT2_FLAG_SWAP_BYTES_WRITE      0x100
#define EXT2_FLAG_MASTER_SB_ONLY        0x200
#define EXT2_FLAG_FORCE                 0x400
#define EXT2_FLAG_SUPER_ONLY            0x800
#define EXT2_FLAG_JOURNAL_DEV_OK        0x1000
#define EXT2_FLAG_IMAGE_FILE            0x2000
#define EXT2_FLAG_EXCLUSIVE             0x4000
#define EXT2_FLAG_SOFTSUPP_FEATURES     0x8000
#define EXT2_FLAG_NOFREE_ON_ERROR       0x10000
#define EXT2_FLAG_64BITS                0x20000
#define EXT2_FLAG_PRINT_PROGRESS        0x40000
#define EXT2_FLAG_DIRECT_IO             0x80000