1. NAME▲

blk_queue_prep_rq - set a prepare_request function for queue

2. SYNOPSIS ▲

void blk_queue_prep_rq(struct request_queue *  q , prep_rq_fn *  pfn );

3. ARGUMENTS ▲

q
    queue

pfn
    prepare_request function

4. DESCRIPTION ▲

ItAqs possible for a queue to register a prepare_request callback which is invoked before the request is handed to the request_fn. The goal of the function is to prepare a request for I/O, it can be used to build a cdb from the request data for instance.

5. COPYRIGHT ▲