mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-03-18 05:04:04 +00:00
[PKT_SCHED]: Convert sch_red to a classful qdisc
Convert sch_red to a classful qdisc. All qdiscs that maintain accurate backlog counters are eligible as child qdiscs. When a queue limit larger than zero is given, a bfifo qdisc is used for backwards compatibility. Current versions of tc enforce a limit larger than zero, other users can avoid creating the default qdisc by using zero. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
a70fcb0ba3
commit
f38c39d6ce
1 changed files with 163 additions and 16 deletions
|
@ -44,6 +44,7 @@ struct red_sched_data
|
||||||
unsigned char flags;
|
unsigned char flags;
|
||||||
struct red_parms parms;
|
struct red_parms parms;
|
||||||
struct red_stats stats;
|
struct red_stats stats;
|
||||||
|
struct Qdisc *qdisc;
|
||||||
};
|
};
|
||||||
|
|
||||||
static inline int red_use_ecn(struct red_sched_data *q)
|
static inline int red_use_ecn(struct red_sched_data *q)
|
||||||
|
@ -59,8 +60,10 @@ static inline int red_use_harddrop(struct red_sched_data *q)
|
||||||
static int red_enqueue(struct sk_buff *skb, struct Qdisc* sch)
|
static int red_enqueue(struct sk_buff *skb, struct Qdisc* sch)
|
||||||
{
|
{
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
struct Qdisc *child = q->qdisc;
|
||||||
|
int ret;
|
||||||
|
|
||||||
q->parms.qavg = red_calc_qavg(&q->parms, sch->qstats.backlog);
|
q->parms.qavg = red_calc_qavg(&q->parms, child->qstats.backlog);
|
||||||
|
|
||||||
if (red_is_idling(&q->parms))
|
if (red_is_idling(&q->parms))
|
||||||
red_end_of_idle_period(&q->parms);
|
red_end_of_idle_period(&q->parms);
|
||||||
|
@ -91,11 +94,16 @@ static int red_enqueue(struct sk_buff *skb, struct Qdisc* sch)
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (sch->qstats.backlog + skb->len <= q->limit)
|
ret = child->enqueue(skb, child);
|
||||||
return qdisc_enqueue_tail(skb, sch);
|
if (likely(ret == NET_XMIT_SUCCESS)) {
|
||||||
|
sch->bstats.bytes += skb->len;
|
||||||
q->stats.pdrop++;
|
sch->bstats.packets++;
|
||||||
return qdisc_drop(skb, sch);
|
sch->q.qlen++;
|
||||||
|
} else {
|
||||||
|
q->stats.pdrop++;
|
||||||
|
sch->qstats.drops++;
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
|
||||||
congestion_drop:
|
congestion_drop:
|
||||||
qdisc_drop(skb, sch);
|
qdisc_drop(skb, sch);
|
||||||
|
@ -105,21 +113,30 @@ congestion_drop:
|
||||||
static int red_requeue(struct sk_buff *skb, struct Qdisc* sch)
|
static int red_requeue(struct sk_buff *skb, struct Qdisc* sch)
|
||||||
{
|
{
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
struct Qdisc *child = q->qdisc;
|
||||||
|
int ret;
|
||||||
|
|
||||||
if (red_is_idling(&q->parms))
|
if (red_is_idling(&q->parms))
|
||||||
red_end_of_idle_period(&q->parms);
|
red_end_of_idle_period(&q->parms);
|
||||||
|
|
||||||
return qdisc_requeue(skb, sch);
|
ret = child->ops->requeue(skb, child);
|
||||||
|
if (likely(ret == NET_XMIT_SUCCESS)) {
|
||||||
|
sch->qstats.requeues++;
|
||||||
|
sch->q.qlen++;
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
static struct sk_buff * red_dequeue(struct Qdisc* sch)
|
static struct sk_buff * red_dequeue(struct Qdisc* sch)
|
||||||
{
|
{
|
||||||
struct sk_buff *skb;
|
struct sk_buff *skb;
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
struct Qdisc *child = q->qdisc;
|
||||||
|
|
||||||
skb = qdisc_dequeue_head(sch);
|
skb = child->dequeue(child);
|
||||||
|
if (skb)
|
||||||
if (skb == NULL && !red_is_idling(&q->parms))
|
sch->q.qlen--;
|
||||||
|
else if (!red_is_idling(&q->parms))
|
||||||
red_start_of_idle_period(&q->parms);
|
red_start_of_idle_period(&q->parms);
|
||||||
|
|
||||||
return skb;
|
return skb;
|
||||||
|
@ -127,14 +144,14 @@ static struct sk_buff * red_dequeue(struct Qdisc* sch)
|
||||||
|
|
||||||
static unsigned int red_drop(struct Qdisc* sch)
|
static unsigned int red_drop(struct Qdisc* sch)
|
||||||
{
|
{
|
||||||
struct sk_buff *skb;
|
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
struct Qdisc *child = q->qdisc;
|
||||||
|
unsigned int len;
|
||||||
|
|
||||||
skb = qdisc_dequeue_tail(sch);
|
if (child->ops->drop && (len = child->ops->drop(child)) > 0) {
|
||||||
if (skb) {
|
|
||||||
unsigned int len = skb->len;
|
|
||||||
q->stats.other++;
|
q->stats.other++;
|
||||||
qdisc_drop(skb, sch);
|
sch->qstats.drops++;
|
||||||
|
sch->q.qlen--;
|
||||||
return len;
|
return len;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -148,15 +165,48 @@ static void red_reset(struct Qdisc* sch)
|
||||||
{
|
{
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
|
||||||
qdisc_reset_queue(sch);
|
qdisc_reset(q->qdisc);
|
||||||
|
sch->q.qlen = 0;
|
||||||
red_restart(&q->parms);
|
red_restart(&q->parms);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void red_destroy(struct Qdisc *sch)
|
||||||
|
{
|
||||||
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
qdisc_destroy(q->qdisc);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct Qdisc *red_create_dflt(struct net_device *dev, u32 limit)
|
||||||
|
{
|
||||||
|
struct Qdisc *q = qdisc_create_dflt(dev, &bfifo_qdisc_ops);
|
||||||
|
struct rtattr *rta;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (q) {
|
||||||
|
rta = kmalloc(RTA_LENGTH(sizeof(struct tc_fifo_qopt)),
|
||||||
|
GFP_KERNEL);
|
||||||
|
if (rta) {
|
||||||
|
rta->rta_type = RTM_NEWQDISC;
|
||||||
|
rta->rta_len = RTA_LENGTH(sizeof(struct tc_fifo_qopt));
|
||||||
|
((struct tc_fifo_qopt *)RTA_DATA(rta))->limit = limit;
|
||||||
|
|
||||||
|
ret = q->ops->change(q, rta);
|
||||||
|
kfree(rta);
|
||||||
|
|
||||||
|
if (ret == 0)
|
||||||
|
return q;
|
||||||
|
}
|
||||||
|
qdisc_destroy(q);
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
static int red_change(struct Qdisc *sch, struct rtattr *opt)
|
static int red_change(struct Qdisc *sch, struct rtattr *opt)
|
||||||
{
|
{
|
||||||
struct red_sched_data *q = qdisc_priv(sch);
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
struct rtattr *tb[TCA_RED_MAX];
|
struct rtattr *tb[TCA_RED_MAX];
|
||||||
struct tc_red_qopt *ctl;
|
struct tc_red_qopt *ctl;
|
||||||
|
struct Qdisc *child = NULL;
|
||||||
|
|
||||||
if (opt == NULL || rtattr_parse_nested(tb, TCA_RED_MAX, opt))
|
if (opt == NULL || rtattr_parse_nested(tb, TCA_RED_MAX, opt))
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
|
@ -169,9 +219,17 @@ static int red_change(struct Qdisc *sch, struct rtattr *opt)
|
||||||
|
|
||||||
ctl = RTA_DATA(tb[TCA_RED_PARMS-1]);
|
ctl = RTA_DATA(tb[TCA_RED_PARMS-1]);
|
||||||
|
|
||||||
|
if (ctl->limit > 0) {
|
||||||
|
child = red_create_dflt(sch->dev, ctl->limit);
|
||||||
|
if (child == NULL)
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
sch_tree_lock(sch);
|
sch_tree_lock(sch);
|
||||||
q->flags = ctl->flags;
|
q->flags = ctl->flags;
|
||||||
q->limit = ctl->limit;
|
q->limit = ctl->limit;
|
||||||
|
if (child)
|
||||||
|
qdisc_destroy(xchg(&q->qdisc, child));
|
||||||
|
|
||||||
red_set_parms(&q->parms, ctl->qth_min, ctl->qth_max, ctl->Wlog,
|
red_set_parms(&q->parms, ctl->qth_min, ctl->qth_max, ctl->Wlog,
|
||||||
ctl->Plog, ctl->Scell_log,
|
ctl->Plog, ctl->Scell_log,
|
||||||
|
@ -186,6 +244,9 @@ static int red_change(struct Qdisc *sch, struct rtattr *opt)
|
||||||
|
|
||||||
static int red_init(struct Qdisc* sch, struct rtattr *opt)
|
static int red_init(struct Qdisc* sch, struct rtattr *opt)
|
||||||
{
|
{
|
||||||
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
|
||||||
|
q->qdisc = &noop_qdisc;
|
||||||
return red_change(sch, opt);
|
return red_change(sch, opt);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -224,15 +285,101 @@ static int red_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
|
||||||
return gnet_stats_copy_app(d, &st, sizeof(st));
|
return gnet_stats_copy_app(d, &st, sizeof(st));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int red_dump_class(struct Qdisc *sch, unsigned long cl,
|
||||||
|
struct sk_buff *skb, struct tcmsg *tcm)
|
||||||
|
{
|
||||||
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
|
||||||
|
if (cl != 1)
|
||||||
|
return -ENOENT;
|
||||||
|
tcm->tcm_handle |= TC_H_MIN(1);
|
||||||
|
tcm->tcm_info = q->qdisc->handle;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int red_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
|
||||||
|
struct Qdisc **old)
|
||||||
|
{
|
||||||
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
|
||||||
|
if (new == NULL)
|
||||||
|
new = &noop_qdisc;
|
||||||
|
|
||||||
|
sch_tree_lock(sch);
|
||||||
|
*old = xchg(&q->qdisc, new);
|
||||||
|
qdisc_reset(*old);
|
||||||
|
sch->q.qlen = 0;
|
||||||
|
sch_tree_unlock(sch);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct Qdisc *red_leaf(struct Qdisc *sch, unsigned long arg)
|
||||||
|
{
|
||||||
|
struct red_sched_data *q = qdisc_priv(sch);
|
||||||
|
return q->qdisc;
|
||||||
|
}
|
||||||
|
|
||||||
|
static unsigned long red_get(struct Qdisc *sch, u32 classid)
|
||||||
|
{
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void red_put(struct Qdisc *sch, unsigned long arg)
|
||||||
|
{
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int red_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
|
||||||
|
struct rtattr **tca, unsigned long *arg)
|
||||||
|
{
|
||||||
|
return -ENOSYS;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int red_delete(struct Qdisc *sch, unsigned long cl)
|
||||||
|
{
|
||||||
|
return -ENOSYS;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker)
|
||||||
|
{
|
||||||
|
if (!walker->stop) {
|
||||||
|
if (walker->count >= walker->skip)
|
||||||
|
if (walker->fn(sch, 1, walker) < 0) {
|
||||||
|
walker->stop = 1;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
walker->count++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct tcf_proto **red_find_tcf(struct Qdisc *sch, unsigned long cl)
|
||||||
|
{
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct Qdisc_class_ops red_class_ops = {
|
||||||
|
.graft = red_graft,
|
||||||
|
.leaf = red_leaf,
|
||||||
|
.get = red_get,
|
||||||
|
.put = red_put,
|
||||||
|
.change = red_change_class,
|
||||||
|
.delete = red_delete,
|
||||||
|
.walk = red_walk,
|
||||||
|
.tcf_chain = red_find_tcf,
|
||||||
|
.dump = red_dump_class,
|
||||||
|
};
|
||||||
|
|
||||||
static struct Qdisc_ops red_qdisc_ops = {
|
static struct Qdisc_ops red_qdisc_ops = {
|
||||||
.id = "red",
|
.id = "red",
|
||||||
.priv_size = sizeof(struct red_sched_data),
|
.priv_size = sizeof(struct red_sched_data),
|
||||||
|
.cl_ops = &red_class_ops,
|
||||||
.enqueue = red_enqueue,
|
.enqueue = red_enqueue,
|
||||||
.dequeue = red_dequeue,
|
.dequeue = red_dequeue,
|
||||||
.requeue = red_requeue,
|
.requeue = red_requeue,
|
||||||
.drop = red_drop,
|
.drop = red_drop,
|
||||||
.init = red_init,
|
.init = red_init,
|
||||||
.reset = red_reset,
|
.reset = red_reset,
|
||||||
|
.destroy = red_destroy,
|
||||||
.change = red_change,
|
.change = red_change,
|
||||||
.dump = red_dump,
|
.dump = red_dump,
|
||||||
.dump_stats = red_dump_stats,
|
.dump_stats = red_dump_stats,
|
||||||
|
|
Loading…
Add table
Reference in a new issue