Retrieving Target Device Information

This section describes LDI interfaces that kernel device consumers can use to retrieve device information about a specified target device. A target device is specified by a layered driver handle. A kernel device consumer can receive information such as device number, device open type, device ID, device minor name, and device size.

ldi_get_dev(9F)

Get the dev_t device number for the target device specified by the layered driver handle.

ldi_get_otyp(9F)

Get the open flag that was used to open the target device specified by the layered driver handle. This flag tells you whether the target device is a character device or a block device.

ldi_get_devid(9F)

Get the ddi_devid_t device ID for the target device specified by the layered driver handle. Use ddi_devid_free(9F) to free the ddi_devid_t when you are finished using the device ID.

ldi_get_minor_name(9F)

Retrieve a buffer that contains the name of the minor node that was opened for the target device. Use kmem_free(9F) to release the buffer when you are finished using the minor node name.

ldi_get_size(9F)

Retrieve the partition size of the target device specified by the layered driver handle.