To return information about the device in a structure that is defined in the /usr/include/sys/devinfo.h file.
This operation allows you to supply a pointer to the address of an area of type struct devinfo in the arg parameter to the IOCINFO operation. This structure is defined in the /usr/include/sys/devinfo.h file. The SCSI target-mode union is used for this as follows:
Initiator-Device
| Item | Description |
|---|---|
| buf_size | Size of transmit buffer. |
| num_bufs | Number of transmit buffers. |
| max_transfer | Unused. Set to zero. |
| adap_devno | Major or Minor devno of SSA adapter to be used for the next transmit operation. |
Use TM_GetDevinfoNodeNum( ) to read the node number to which the data is sent.
Target-Device
| Item | Description |
|---|---|
| buf_size | Size of receive buffer. |
| num_bufs | Number of receive buffers. |
| max_transfer | Unused. Set to zero. |
| adap_devno | Major or Minor devno of SSA adapter initially used by the paired initiator-mode device. |
Use TM_GetDevinfoNodeNum( ) to read the node number from which the data is received.
The remainder of the structure is filled as follows:
| Item | Description |
|---|---|
| devtype | DD_TMSCSI. |
| flags | Set to zero. |
| devsubtype | DS_TM. |