net: sched: teach tcf_bind/unbind_filter to use block->q
Whenever the block->q is set, it can be used instead of tp->q as it
contains the same value. When it is not set, which can't happen now but
it might happen with the follow-up shared blocks introduction, the class
is not set in the result. That would lead to a class lookup instead
of direct class pointer use for classful qdiscs. However, it is not
planned to support classful qdisqs sharing filter blocks, so that may
never happen.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 7bed674..49a143e 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -74,36 +74,43 @@
}
static inline unsigned long
-cls_set_class(struct tcf_proto *tp, unsigned long *clp,
- unsigned long cl)
+cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
{
unsigned long old_cl;
-
- tcf_tree_lock(tp);
+
+ sch_tree_lock(q);
old_cl = __cls_set_class(clp, cl);
- tcf_tree_unlock(tp);
-
+ sch_tree_unlock(q);
return old_cl;
}
static inline void
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
{
+ struct Qdisc *q = tp->chain->block->q;
unsigned long cl;
- cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
- cl = cls_set_class(tp, &r->class, cl);
+ /* Check q as it is not set for shared blocks. In that case,
+ * setting class is not supported.
+ */
+ if (!q)
+ return;
+ cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
+ cl = cls_set_class(q, &r->class, cl);
if (cl)
- tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
+ q->ops->cl_ops->unbind_tcf(q, cl);
}
static inline void
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
{
+ struct Qdisc *q = tp->chain->block->q;
unsigned long cl;
+ if (!q)
+ return;
if ((cl = __cls_set_class(&r->class, 0)) != 0)
- tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
+ q->ops->cl_ops->unbind_tcf(q, cl);
}
struct tcf_exts {