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skb_dst_set_unref will use noref version even for
DST_NOCACHE entries because DST_NOCACHE means dst is not
cached in routing structures, still dst could be cached
by routing users and used to produce noref instances.
Signed-off-by: Julian Anastasov <ja@xxxxxx>
---
include/linux/skbuff.h | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 821c7f4..4d422af 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -573,6 +573,20 @@ static inline void skb_dst_set(struct sk_buff *skb, struct
dst_entry *dst)
extern void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst);
/**
+ * skb_dst_set_unref - sets skb dst, without a reference
+ * @skb: buffer
+ * @dst: dst entry
+ *
+ * Sets skb dst, assuming a reference was not taken on dst
+ * skb_dst_drop() should not dst_release() this dst
+ */
+static inline void skb_dst_set_unref(struct sk_buff *skb, struct dst_entry
*dst)
+{
+ WARN_ON(!rcu_read_lock_held() && !rcu_read_lock_bh_held());
+ skb->_skb_refdst = (unsigned long)dst | SKB_DST_NOREF;
+}
+
+/**
* skb_dst_is_noref - Test if skb dst isn't refcounted
* @skb: buffer
*/
--
1.7.3.4
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