blk_queue_prep_rq (9)

Set a prepare_request function for queue

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  4. blk_queue_prep_rq: Set a prepare_request function for queue
  1. Carta.tech
  2. Packages
  3. linux-manual-3.16
  4. blk_queue_prep_rq: Set a prepare_request function for queue

SYNOPSIS

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

ARGUMENTS

q

queue

pfn

prepare_request function

DESCRIPTION

It's 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.

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