Writing Device Drivers for Oracle^® Solaris 11.3

Block Driver Structure Overview

Block Driver Roadmap shows data structures and routines that define the structure of a block device driver. Device drivers typically include the following elements:

• Device-loadable driver section

• Device configuration section

• Device access section

The shaded device access section in the following figure illustrates entry points for block drivers.

Figure 14  Block Driver Roadmap

Associated with each device driver is a dev_ops(9S) structure, which in turn refers to a cb_ops(9S) structure. See Driver Autoconfiguration for details on driver data structures.

Block device drivers provide these entry points:

• open(9E)

• close(9E)

• strategy(9E)

• print(9E)