Linux SCSI programming

["Sihan Goi" <goister@xxxxxxxxx>]

Hi,

I'm trying to port a Windows SCSI API over to Linux. The API has
several functions, most of them using ATA_PASS_THROUGH_EX to send a
vendor specific command over to the device. I've managed to port 1 of
the API function that is a modified INQUIRY command. However, I'm very
confused as to how ATA passthrough is done in Linux. I've looked at
the sg3_utils source code to get some inspiration but it's too
complicated for me to understand what's going on.

Does anyone know how to port this?

In Windows a ATA_PASS_THROUGH_EX pointer is declared and memory
allocated for it. It's fields are then initialized(Length, AtaFlags,
DataTransferLength, TimeOutValue, DataBufferOffset, CurrentTaskFile[],
PreviousTaskFile[], etc) and then a DeviceIoControl() is called.

Now I know Linux's version of DeviceIoControl is ioctl() and I've used
it successfully for the INQUIRY command, but what's Linux's version of
ATA_PASS_THROUGH_EX?

Any help would be appreciated. Thanks!
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