static int
fifo_new_sched(struct dn_sch_inst *si)
{
/* This scheduler instance contains the queue */
struct dn_queue *q = (struct dn_queue *)(si + 1);
set_oid(&q->ni.oid, DN_QUEUE, sizeof(*q));
q->_si = si;
q->fs = si->sched->fs;
return 0;
}
/*
* Initialize fq_codel scheduler instance.
* also, allocate memory for flows array.
*/
static int
fq_codel_new_sched(struct dn_sch_inst *_si)
{
struct fq_codel_si *si;
struct dn_queue *q;
struct fq_codel_schk *schk;
int i;
si = (struct fq_codel_si *)_si;
schk = (struct fq_codel_schk *)(_si->sched+1);
if(si->flows) {
D("si already configured!");
return 0;
}
/* init the main queue */
q = &si->main_q;
set_oid(&q->ni.oid, DN_QUEUE, sizeof(*q));
q->_si = _si;
q->fs = _si->sched->fs;
/* allocate memory for flows array */
si->flows = malloc(schk->cfg.flows_cnt * sizeof(struct fq_codel_flow),
M_DUMMYNET, M_NOWAIT | M_ZERO);
if (si->flows == NULL) {
D("cannot allocate memory for fq_codel configuration parameters");
return ENOMEM ;
}
/* init perturbation for this si */
si->perturbation = random();
/* init the old and new flows lists */
STAILQ_INIT(&si->newflows);
STAILQ_INIT(&si->oldflows);
/* init the flows (sub-queues) */
for (i = 0; i < schk->cfg.flows_cnt; i++) {
/* init codel */
si->flows[i].cst.maxpkt_size = 500;
}
fq_codel_desc.ref_count++;
return 0;
}