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Diffstat (limited to 'net/sched/sch_prio.c')
-rw-r--r--net/sched/sch_prio.c136
1 files changed, 16 insertions, 120 deletions
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index 39157f7bc04..536ca474dc6 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -24,11 +24,9 @@
struct prio_sched_data
{
int bands;
- int curband; /* for round-robin */
struct tcf_proto *filter_list;
u8 prio2band[TC_PRIO_MAX+1];
struct Qdisc *queues[TCQ_PRIO_BANDS];
- int mq;
};
@@ -55,17 +53,14 @@ prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
if (!q->filter_list || err < 0) {
if (TC_H_MAJ(band))
band = 0;
- band = q->prio2band[band&TC_PRIO_MAX];
- goto out;
+ return q->queues[q->prio2band[band&TC_PRIO_MAX]];
}
band = res.classid;
}
band = TC_H_MIN(band) - 1;
if (band >= q->bands)
- band = q->prio2band[0];
-out:
- if (q->mq)
- skb_set_queue_mapping(skb, band);
+ return q->queues[q->prio2band[0]];
+
return q->queues[band];
}
@@ -123,68 +118,23 @@ prio_requeue(struct sk_buff *skb, struct Qdisc* sch)
}
-static struct sk_buff *
-prio_dequeue(struct Qdisc* sch)
+static struct sk_buff *prio_dequeue(struct Qdisc* sch)
{
- struct sk_buff *skb;
struct prio_sched_data *q = qdisc_priv(sch);
int prio;
- struct Qdisc *qdisc;
for (prio = 0; prio < q->bands; prio++) {
- /* Check if the target subqueue is available before
- * pulling an skb. This way we avoid excessive requeues
- * for slower queues.
- */
- if (!__netif_subqueue_stopped(qdisc_dev(sch),
- (q->mq ? prio : 0))) {
- qdisc = q->queues[prio];
- skb = qdisc->dequeue(qdisc);
- if (skb) {
- sch->q.qlen--;
- return skb;
- }
+ struct Qdisc *qdisc = q->queues[prio];
+ struct sk_buff *skb = qdisc->dequeue(qdisc);
+ if (skb) {
+ sch->q.qlen--;
+ return skb;
}
}
return NULL;
}
-static struct sk_buff *rr_dequeue(struct Qdisc* sch)
-{
- struct sk_buff *skb;
- struct prio_sched_data *q = qdisc_priv(sch);
- struct Qdisc *qdisc;
- int bandcount;
-
- /* Only take one pass through the queues. If nothing is available,
- * return nothing.
- */
- for (bandcount = 0; bandcount < q->bands; bandcount++) {
- /* Check if the target subqueue is available before
- * pulling an skb. This way we avoid excessive requeues
- * for slower queues. If the queue is stopped, try the
- * next queue.
- */
- if (!__netif_subqueue_stopped(qdisc_dev(sch),
- (q->mq ? q->curband : 0))) {
- qdisc = q->queues[q->curband];
- skb = qdisc->dequeue(qdisc);
- if (skb) {
- sch->q.qlen--;
- q->curband++;
- if (q->curband >= q->bands)
- q->curband = 0;
- return skb;
- }
- }
- q->curband++;
- if (q->curband >= q->bands)
- q->curband = 0;
- }
- return NULL;
-}
-
static unsigned int prio_drop(struct Qdisc* sch)
{
struct prio_sched_data *q = qdisc_priv(sch);
@@ -229,45 +179,22 @@ static int prio_tune(struct Qdisc *sch, struct nlattr *opt)
{
struct prio_sched_data *q = qdisc_priv(sch);
struct tc_prio_qopt *qopt;
- struct nlattr *tb[TCA_PRIO_MAX + 1];
- int err;
int i;
- err = nla_parse_nested_compat(tb, TCA_PRIO_MAX, opt, NULL, qopt,
- sizeof(*qopt));
- if (err < 0)
- return err;
-
- q->bands = qopt->bands;
- /* If we're multiqueue, make sure the number of incoming bands
- * matches the number of queues on the device we're associating with.
- * If the number of bands requested is zero, then set q->bands to
- * dev->egress_subqueue_count. Also, the root qdisc must be the
- * only one that is enabled for multiqueue, since it's the only one
- * that interacts with the underlying device.
- */
- q->mq = nla_get_flag(tb[TCA_PRIO_MQ]);
- if (q->mq) {
- if (sch->parent != TC_H_ROOT)
- return -EINVAL;
- if (netif_is_multiqueue(qdisc_dev(sch))) {
- if (q->bands == 0)
- q->bands = qdisc_dev(sch)->egress_subqueue_count;
- else if (q->bands != qdisc_dev(sch)->egress_subqueue_count)
- return -EINVAL;
- } else
- return -EOPNOTSUPP;
- }
+ if (nla_len(opt) < sizeof(*qopt))
+ return -EINVAL;
+ qopt = nla_data(opt);
- if (q->bands > TCQ_PRIO_BANDS || q->bands < 2)
+ if (qopt->bands > TCQ_PRIO_BANDS || qopt->bands < 2)
return -EINVAL;
for (i=0; i<=TC_PRIO_MAX; i++) {
- if (qopt->priomap[i] >= q->bands)
+ if (qopt->priomap[i] >= qopt->bands)
return -EINVAL;
}
sch_tree_lock(sch);
+ q->bands = qopt->bands;
memcpy(q->prio2band, qopt->priomap, TC_PRIO_MAX+1);
for (i=q->bands; i<TCQ_PRIO_BANDS; i++) {
@@ -333,10 +260,6 @@ static int prio_dump(struct Qdisc *sch, struct sk_buff *skb)
nest = nla_nest_compat_start(skb, TCA_OPTIONS, sizeof(opt), &opt);
if (nest == NULL)
goto nla_put_failure;
- if (q->mq) {
- if (nla_put_flag(skb, TCA_PRIO_MQ) < 0)
- goto nla_put_failure;
- }
nla_nest_compat_end(skb, nest);
return skb->len;
@@ -509,44 +432,17 @@ static struct Qdisc_ops prio_qdisc_ops __read_mostly = {
.owner = THIS_MODULE,
};
-static struct Qdisc_ops rr_qdisc_ops __read_mostly = {
- .next = NULL,
- .cl_ops = &prio_class_ops,
- .id = "rr",
- .priv_size = sizeof(struct prio_sched_data),
- .enqueue = prio_enqueue,
- .dequeue = rr_dequeue,
- .requeue = prio_requeue,
- .drop = prio_drop,
- .init = prio_init,
- .reset = prio_reset,
- .destroy = prio_destroy,
- .change = prio_tune,
- .dump = prio_dump,
- .owner = THIS_MODULE,
-};
-
static int __init prio_module_init(void)
{
- int err;
-
- err = register_qdisc(&prio_qdisc_ops);
- if (err < 0)
- return err;
- err = register_qdisc(&rr_qdisc_ops);
- if (err < 0)
- unregister_qdisc(&prio_qdisc_ops);
- return err;
+ return register_qdisc(&prio_qdisc_ops);
}
static void __exit prio_module_exit(void)
{
unregister_qdisc(&prio_qdisc_ops);
- unregister_qdisc(&rr_qdisc_ops);
}
module_init(prio_module_init)
module_exit(prio_module_exit)
MODULE_LICENSE("GPL");
-MODULE_ALIAS("sch_rr");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 20:24:40 +0000