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[NET_SCHED]: sch_htb: use generic estimator 

Use the generic estimator instead of reimplementing (parts of) it.
For compatibility always create a default estimator for new classes.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-07-02 22:48:13 -07:00 committed by David S. Miller
parent 4bdf39911e
commit ee39e10c27
1 changed files with 24 additions and 61 deletions
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85
net/sched/sch_htb.c
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@ -69,8 +69,6 @@
*/
#define HTB_HSIZE 16 /* classid hash size */
#define HTB_EWMAC 2 /* rate average over HTB_EWMAC*HTB_HSIZE sec */
#define HTB_RATECM 1 /* whether to use rate computer */
#define HTB_HYSTERESIS 1 /* whether to use mode hysteresis for speedup */
#define HTB_VER 0x30011 /* major must be matched with number suplied by TC as version */
@ -95,12 +93,6 @@ struct htb_class {
struct tc_htb_xstats xstats; /* our special stats */
int refcnt; /* usage count of this class */
#ifdef HTB_RATECM
/* rate measurement counters */
unsigned long rate_bytes, sum_bytes;
unsigned long rate_packets, sum_packets;
#endif
/* topology */
int level; /* our level (see above) */
struct htb_class *parent; /* parent class */
@ -194,10 +186,6 @@ struct htb_sched {
int rate2quantum; /* quant = rate / rate2quantum */
psched_time_t now; /* cached dequeue time */
struct qdisc_watchdog watchdog;
#ifdef HTB_RATECM
struct timer_list rttim; /* rate computer timer */
int recmp_bucket; /* which hash bucket to recompute next */
#endif
/* non shaped skbs; let them go directly thru */
struct sk_buff_head direct_queue;
@ -677,34 +665,6 @@ static int htb_requeue(struct sk_buff *skb, struct Qdisc *sch)
return NET_XMIT_SUCCESS;
}
#ifdef HTB_RATECM
#define RT_GEN(D,R) R+=D-(R/HTB_EWMAC);D=0
static void htb_rate_timer(unsigned long arg)
{
struct Qdisc *sch = (struct Qdisc *)arg;
struct htb_sched *q = qdisc_priv(sch);
struct hlist_node *p;
struct htb_class *cl;
/* lock queue so that we can muck with it */
spin_lock_bh(&sch->dev->queue_lock);
q->rttim.expires = jiffies + HZ;
add_timer(&q->rttim);
/* scan and recompute one bucket at time */
if (++q->recmp_bucket >= HTB_HSIZE)
q->recmp_bucket = 0;
hlist_for_each_entry(cl,p, q->hash + q->recmp_bucket, hlist) {
RT_GEN(cl->sum_bytes, cl->rate_bytes);
RT_GEN(cl->sum_packets, cl->rate_packets);
}
spin_unlock_bh(&sch->dev->queue_lock);
}
#endif
/**
* htb_charge_class - charges amount "bytes" to leaf and ancestors
*
@ -750,11 +710,6 @@ static void htb_charge_class(struct htb_sched *q, struct htb_class *cl,
if (cl->cmode != HTB_CAN_SEND)
htb_add_to_wait_tree(q, cl, diff);
}
#ifdef HTB_RATECM
/* update rate counters */
cl->sum_bytes += bytes;
cl->sum_packets++;
#endif
/* update byte stats except for leaves which are already updated */
if (cl->level) {
@ -1095,13 +1050,6 @@ static int htb_init(struct Qdisc *sch, struct rtattr *opt)
if (q->direct_qlen < 2) /* some devices have zero tx_queue_len */
q->direct_qlen = 2;
#ifdef HTB_RATECM
init_timer(&q->rttim);
q->rttim.function = htb_rate_timer;
q->rttim.data = (unsigned long)sch;
q->rttim.expires = jiffies + HZ;
add_timer(&q->rttim);
#endif
if ((q->rate2quantum = gopt->rate2quantum) < 1)
q->rate2quantum = 1;
q->defcls = gopt->defcls;
@ -1175,11 +1123,6 @@ htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d)
{
struct htb_class *cl = (struct htb_class *)arg;
#ifdef HTB_RATECM
cl->rate_est.bps = cl->rate_bytes / (HTB_EWMAC * HTB_HSIZE);
cl->rate_est.pps = cl->rate_packets / (HTB_EWMAC * HTB_HSIZE);
#endif
if (!cl->level && cl->un.leaf.q)
cl->qstats.qlen = cl->un.leaf.q->q.qlen;
cl->xstats.tokens = cl->tokens;
@ -1277,6 +1220,7 @@ static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
BUG_TRAP(cl->un.leaf.q);
qdisc_destroy(cl->un.leaf.q);
}
gen_kill_estimator(&cl->bstats, &cl->rate_est);
qdisc_put_rtab(cl->rate);
qdisc_put_rtab(cl->ceil);
@ -1305,9 +1249,6 @@ static void htb_destroy(struct Qdisc *sch)
struct htb_sched *q = qdisc_priv(sch);
qdisc_watchdog_cancel(&q->watchdog);
#ifdef HTB_RATECM
del_timer_sync(&q->rttim);
#endif
/* This line used to be after htb_destroy_class call below
and surprisingly it worked in 2.4. But it must precede it
because filter need its target class alive to be able to call
@ -1403,6 +1344,20 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
if (!cl) { /* new class */
struct Qdisc *new_q;
int prio;
struct {
struct rtattr rta;
struct gnet_estimator opt;
} est = {
.rta = {
.rta_len = RTA_LENGTH(sizeof(est.opt)),
.rta_type = TCA_RATE,
},
.opt = {
/* 4s interval, 16s averaging constant */
.interval = 2,
.ewma_log = 2,
},
};
/* check for valid classid */
if (!classid || TC_H_MAJ(classid ^ sch->handle)
@ -1418,6 +1373,9 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
if ((cl = kzalloc(sizeof(*cl), GFP_KERNEL)) == NULL)
goto failure;
gen_new_estimator(&cl->bstats, &cl->rate_est,
&sch->dev->queue_lock,
tca[TCA_RATE-1] ? : &est.rta);
cl->refcnt = 1;
INIT_LIST_HEAD(&cl->sibling);
INIT_HLIST_NODE(&cl->hlist);
@ -1469,8 +1427,13 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
hlist_add_head(&cl->hlist, q->hash + htb_hash(classid));
list_add_tail(&cl->sibling,
parent ? &parent->children : &q->root);
} else
} else {
if (tca[TCA_RATE-1])
gen_replace_estimator(&cl->bstats, &cl->rate_est,
&sch->dev->queue_lock,
tca[TCA_RATE-1]);
sch_tree_lock(sch);
}
/* it used to be a nasty bug here, we have to check that node
is really leaf before changing cl->un.leaf ! */