Re: SCSIPORT question (SRB_FUNCTION_CLAIM_DEVICE)

NTDEV
1

I don’t think you should return anything. The ClaimDevice function doesn’t
do anything with it, only the return status matters. That’s how I read it.
Maybe they just forgot to delete that line :slight_smile:

I do this in my driver:

…
switch(…)
{
…
// Claim device
case SRB_FUNCTION_CLAIM_DEVICE:
TRACE(( “PDO - SRB_FUNCTION_CLAIM_DEVICE\n”));
Srb->SrbStatus = SRB_STATUS_SUCCESS;
status = STATUS_SUCCESS;
ioInformation = 0;
break;
…
}
…
Irp->IoStatus.Status = status;
Irp->IoStatus.Information = ioInformation;
IoCompleteRequest (Irp, IO_NO_INCREMENT);

return status;

Zoltan

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2

Hi,

This is not very good idea return success to every claim device request.
The code have to be a little bit more complex (return success to the first
caller only and clear internal claimed flag after storage PnP stack
rebuilds).

Regards,
Anton Kolomyeytsev

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“KoolSockets” & “KoolStorage” - TDI Client, Kernel Sockets, iSCSI port
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On 09/28/01, “” wrote:
> I don’t think you should return anything. The ClaimDevice function doesn’t
> do anything with it, only the return status matters. That’s how I read it.
> Maybe they just forgot to delete that line :slight_smile:
>
> I do this in my driver:
>
> …
> switch(…)
> {
> …
> // Claim device
> case SRB_FUNCTION_CLAIM_DEVICE:
> TRACE(( “PDO - SRB_FUNCTION_CLAIM_DEVICE\n”));
> Srb->SrbStatus = SRB_STATUS_SUCCESS;
> status = STATUS_SUCCESS;
> ioInformation = 0;
> break;
> …
> }
> …
> Irp->IoStatus.Status = status;
> Irp->IoStatus.Information = ioInformation;
> IoCompleteRequest (Irp, IO_NO_INCREMENT);
>
> return status;
>
> Zoltan
>
>
>
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