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[NET_SCHED] cls_u32: refcounting fix for u32_delete()

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Deleting of nonroot hnodes mostly doesn't work in u32_delete():
refcnt == 1 is expected, but such hnodes' refcnts are initialized
with 0 and charged only with "link" nodes. Now they'll start with
1 like usual. Thanks to Patrick McHardy for an improving suggestion.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski 2008-04-12 18:37:13 -07:00 committed by David S. Miller
parent 028b027524
commit e56cfad132
1 changed files with 9 additions and 3 deletions
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12
net/sched/cls_u32.c
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@ -411,8 +411,10 @@ static void u32_destroy(struct tcf_proto *tp)
}
}
for (ht=tp_c->hlist; ht; ht = ht->next)
for (ht = tp_c->hlist; ht; ht = ht->next) {
ht->refcnt--;
u32_clear_hnode(tp, ht);
}
while ((ht = tp_c->hlist) != NULL) {
tp_c->hlist = ht->next;
@ -441,8 +443,12 @@ static int u32_delete(struct tcf_proto *tp, unsigned long arg)
if (tp->root == ht)
return -EINVAL;
if (--ht->refcnt == 0)
if (ht->refcnt == 1) {
ht->refcnt--;
u32_destroy_hnode(tp, ht);
} else {
return -EBUSY;
}
return 0;
}
@ -568,7 +574,7 @@ static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
if (ht == NULL)
return -ENOBUFS;
ht->tp_c = tp_c;
ht->refcnt = 0;
ht->refcnt = 1;
ht->divisor = divisor;
ht->handle = handle;
ht->prio = tp->prio;