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-rw-r--r--include/net/sch_generic.h38
1 files changed, 34 insertions, 4 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 433604bb3fe8..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 *);
@@ -583,9 +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);