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-rw-r--r--net/sched/sch_htb.c36
1 files changed, 26 insertions, 10 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 4b52fa78935a..215e68c2b615 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1223,17 +1223,14 @@ static int htb_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
struct htb_class *cl = (struct htb_class *)arg;
if (cl && !cl->level) {
- if (new == NULL && (new = qdisc_create_dflt(sch->dev,
- &pfifo_qdisc_ops))
+ if (new == NULL &&
+ (new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops,
+ cl->classid))
== NULL)
return -ENOBUFS;
sch_tree_lock(sch);
if ((*old = xchg(&cl->un.leaf.q, new)) != NULL) {
- if (cl->prio_activity)
- htb_deactivate(qdisc_priv(sch), cl);
-
- /* TODO: is it correct ? Why CBQ doesn't do it ? */
- sch->q.qlen -= (*old)->q.qlen;
+ qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
qdisc_reset(*old);
}
sch_tree_unlock(sch);
@@ -1248,6 +1245,14 @@ static struct Qdisc *htb_leaf(struct Qdisc *sch, unsigned long arg)
return (cl && !cl->level) ? cl->un.leaf.q : NULL;
}
+static void htb_qlen_notify(struct Qdisc *sch, unsigned long arg)
+{
+ struct htb_class *cl = (struct htb_class *)arg;
+
+ if (cl->un.leaf.q->q.qlen == 0)
+ htb_deactivate(qdisc_priv(sch), cl);
+}
+
static unsigned long htb_get(struct Qdisc *sch, u32 classid)
{
struct htb_class *cl = htb_find(classid, sch);
@@ -1269,9 +1274,9 @@ static void htb_destroy_filters(struct tcf_proto **fl)
static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
{
struct htb_sched *q = qdisc_priv(sch);
+
if (!cl->level) {
BUG_TRAP(cl->un.leaf.q);
- sch->q.qlen -= cl->un.leaf.q->q.qlen;
qdisc_destroy(cl->un.leaf.q);
}
qdisc_put_rtab(cl->rate);
@@ -1322,6 +1327,7 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
{
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl = (struct htb_class *)arg;
+ unsigned int qlen;
// TODO: why don't allow to delete subtree ? references ? does
// tc subsys quarantee us that in htb_destroy it holds no class
@@ -1334,6 +1340,12 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
/* delete from hash and active; remainder in destroy_class */
hlist_del_init(&cl->hlist);
+ if (!cl->level) {
+ qlen = cl->un.leaf.q->q.qlen;
+ qdisc_reset(cl->un.leaf.q);
+ qdisc_tree_decrease_qlen(cl->un.leaf.q, qlen);
+ }
+
if (cl->prio_activity)
htb_deactivate(q, cl);
@@ -1410,11 +1422,14 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
/* create leaf qdisc early because it uses kmalloc(GFP_KERNEL)
so that can't be used inside of sch_tree_lock
-- thanks to Karlis Peisenieks */
- new_q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops);
+ new_q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, classid);
sch_tree_lock(sch);
if (parent && !parent->level) {
+ unsigned int qlen = parent->un.leaf.q->q.qlen;
+
/* turn parent into inner node */
- sch->q.qlen -= parent->un.leaf.q->q.qlen;
+ qdisc_reset(parent->un.leaf.q);
+ qdisc_tree_decrease_qlen(parent->un.leaf.q, qlen);
qdisc_destroy(parent->un.leaf.q);
if (parent->prio_activity)
htb_deactivate(q, parent);
@@ -1562,6 +1577,7 @@ static void htb_walk(struct Qdisc *sch, struct qdisc_walker *arg)
static struct Qdisc_class_ops htb_class_ops = {
.graft = htb_graft,
.leaf = htb_leaf,
+ .qlen_notify = htb_qlen_notify,
.get = htb_get,
.put = htb_put,
.change = htb_change_class,
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