[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>

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 035788c5b7f8a75c07961c0694df50aeaa9ecef1..26f81b848bfde1436e385f0552242e30988df784 100644 (file)
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -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 ! */