[PATCH] nvmet: better data length validation

[Christoph Hellwig]

On Thu, Nov 09, 2017 at 06:41:24PM +0200, Sagi Grimberg wrote:
>
>> Currently the NVMe target stores the expexted data length in req->data_len
>> and uses that for data transfer decisions, but that does not take the
>> actual transfer length in the SGLs into account.  So this adds a new
>> transfer_len field, into which the transport drivers store the actual
>> transfer length.  We then check the two match before actually executing
>> the command.
>>
>> The FC transport driver already had such a field, which is removed in
>> favour of the common one.
>
> That will also be useful when we will have DIF support ;)

.. and for the passthrough driver as well.