static void
fiops_merged_requests(struct request_queue *q, struct request *rq,
struct request *next)
{
struct fiops_ioc *ioc = RQ_CIC(rq);
struct fiops_data *fiopsd = q->elevator->elevator_data;
fiops_remove_request(next);
ioc = RQ_CIC(next);
/*
* all requests of this task are merged to other tasks, delete it
* from the service tree.
*/
if (fiops_ioc_on_rr(ioc) && RB_EMPTY_ROOT(&ioc->sort_list))
fiops_del_ioc_rr(fiopsd, ioc);
}
static void fiops_merged_request(struct request_queue *q, struct request *req,
int type)
{
if (type == ELEVATOR_FRONT_MERGE) {
struct fiops_ioc *ioc = RQ_CIC(req);
fiops_reposition_rq_rb(ioc, req);
}
}
static void fiops_insert_request(struct request_queue *q, struct request *rq)
{
struct fiops_ioc *ioc = RQ_CIC(rq);
fiops_init_prio_data(ioc);
list_add_tail(&rq->queuelist, &ioc->fifo);
fiops_add_rq_rb(rq);
}
static void fiops_add_rq_rb(struct request *rq)
{
struct fiops_ioc *ioc = RQ_CIC(rq);
struct fiops_data *fiopsd = ioc->fiopsd;
elv_rb_add(&ioc->sort_list, rq);
if (!fiops_ioc_on_rr(ioc))
fiops_add_ioc_rr(fiopsd, ioc);
}
static void fiops_completed_request(struct request_queue *q, struct request *rq)
{
struct fiops_data *fiopsd = q->elevator->elevator_data;
struct fiops_ioc *ioc = RQ_CIC(rq);
fiopsd->in_flight[rq_is_sync(rq)]--;
ioc->in_flight--;
if (fiopsd->in_flight[0] + fiopsd->in_flight[1] == 0)
fiops_schedule_dispatch(fiopsd);
}
static int fiops_allow_merge(struct request_queue *q, struct request *rq,
struct bio *bio)
{
struct fiops_data *fiopsd = q->elevator->elevator_data;
struct fiops_ioc *cic;
/*
* Lookup the ioc that this bio will be queued with. Allow
* merge only if rq is queued there.
*/
cic = fiops_cic_lookup(fiopsd, current->io_context);
return cic == RQ_CIC(rq);
}
/*
* rb tree support functions
*/
static void fiops_del_rq_rb(struct request *rq)
{
struct fiops_ioc *ioc = RQ_CIC(rq);
elv_rb_del(&ioc->sort_list, rq);
}