cb_ops(9S)

The cb_ops(9S) structure is the SunOS 5.x version of the cdevsw and bdevsw tables of previous versions of Unix System V. It contains character and block device information and the driver entry points for non-STREAMS drivers.

struct cb_ops  {
		int		*cb_open)(dev_t *devp, int flag, int otyp, cred_t *credp);
		int		(*cb_close)(dev_t dev, int flag, int otyp, cred_t *credp);
		int		(*cb_strategy)(struct buf *bp);
 	int		(*cb_print)(dev_t dev, char *str);
		int		(*cb_dump)(dev_t dev, caddr_t addr,daddr_t blkno, int nblk);
		int		(*cb_read)(dev_t dev, struct uio *uiop, cred_t *credp);
		int		(*cb_write)(dev_t dev, struct uio *uiop, cred_t *credp);
		int		(*cb_ioctl)(dev_t dev, int cmd, int arg, int mode,
						cred_t *credp, int *rvalp);
		int		(*cb_devmap)(dev_t dev, dev_info_t *dip, 
						ddi_devmap_data_t *dvdp, ddi_devmap_cmd_t cmd, off_t offset, 
						unsigned int len, unsigned int prot, cred_t *credp);
		int		(*cb_mmap)(dev_t dev, off_t off, int prot);
		int		(*cb_segmap)(dev_t dev, off_t off, struct as *asp, 
						caddr_t *addrp, off_t len, unsigned int prot, 
						unsigned int maxprot, unsigned int flags, cred_t *credp);
		int		(*cb_chpoll)(dev_t dev, short events, int anyyet, 
						short *reventsp, struct pollhead **phpp);
		int		(*cb_prop_op)(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 
						int mod_flags, char *name, caddr_t valuep, int *length);

 struct streamtab *cb_str;		/* streams information */

	/*
	 * The cb_flag fields are here to tell the system a bit about the device.
 * The bit definitions are in <sys/conf.h>.
	 */
 int		cb_flag;						/* driver compatibility flag */
};