1 files changed, 50 insertions, 8 deletions

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 03ca5d826757..3c8728aaab4e 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -23,11 +23,17 @@ struct qdisc_rate_table {
 };
 
 enum qdisc_state_t {
-	__QDISC_STATE_RUNNING,
 	__QDISC_STATE_SCHED,
 	__QDISC_STATE_DEACTIVATED,
 };
 
+/*
+ * following bits are only changed while qdisc lock is held
+ */
+enum qdisc___state_t {
+	__QDISC___STATE_RUNNING,
+};
+
 struct qdisc_size_table {
 	struct list_head	list;
 	struct tc_sizespec	szopts;
@@ -72,10 +78,27 @@ struct Qdisc {
 	unsigned long		state;
 	struct sk_buff_head	q;
 	struct gnet_stats_basic_packed bstats;
+	unsigned long		__state;
 	struct gnet_stats_queue	qstats;
-	struct rcu_head     rcu_head;
+	struct rcu_head		rcu_head;
+	spinlock_t		busylock;
 };
 
+static inline bool qdisc_is_running(struct Qdisc *qdisc)
+{
+	return test_bit(__QDISC___STATE_RUNNING, &qdisc->__state);
+}
+
+static inline bool qdisc_run_begin(struct Qdisc *qdisc)
+{
+	return !__test_and_set_bit(__QDISC___STATE_RUNNING, &qdisc->__state);
+}
+
+static inline void qdisc_run_end(struct Qdisc *qdisc)
+{
+	__clear_bit(__QDISC___STATE_RUNNING, &qdisc->__state);
+}
+
 struct Qdisc_class_ops {
 	/* Child qdisc manipulation */
 	struct netdev_queue *	(*select_queue)(struct Qdisc *, struct tcmsg *);
@@ -313,12 +336,24 @@ extern void qdisc_calculate_pkt_len(struct sk_buff *skb,
 extern void tcf_destroy(struct tcf_proto *tp);
 extern void tcf_destroy_chain(struct tcf_proto **fl);
 
-/* Reset all TX qdiscs of a device.  */
+/* Reset all TX qdiscs greater then index of a device.  */
+static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
+{
+	struct Qdisc *qdisc;
+
+	for (; i < dev->num_tx_queues; i++) {
+		qdisc = netdev_get_tx_queue(dev, i)->qdisc;
+		if (qdisc) {
+			spin_lock_bh(qdisc_lock(qdisc));
+			qdisc_reset(qdisc);
+			spin_unlock_bh(qdisc_lock(qdisc));
+		}
+	}
+}
+
 static inline void qdisc_reset_all_tx(struct net_device *dev)
 {
-	unsigned int i;
-	for (i = 0; i < dev->num_tx_queues; i++)
-		qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
+	qdisc_reset_all_tx_gt(dev, 0);
 }
 
 /* Are all TX queues of the device empty?  */
@@ -571,9 +606,16 @@ static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
 }
 
 #ifdef CONFIG_NET_CLS_ACT
-static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask)
+static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask,
+					    int action)
 {
-	struct sk_buff *n = skb_clone(skb, gfp_mask);
+	struct sk_buff *n;
+
+	if ((action == TC_ACT_STOLEN || action == TC_ACT_QUEUED) &&
+	    !skb_shared(skb))
+		n = skb_get(skb);
+	else
+		n = skb_clone(skb, gfp_mask);
 
 	if (n) {
 		n->tc_verd = SET_TC_VERD(n->tc_verd, 0);