1 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6fcbbbd12ceb..77ddf2de712f 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -550,6 +550,7 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
         return __alloc_skb(size, priority, 1, NUMA_NO_NODE);
 }
 
+extern void skb_recycle(struct sk_buff *skb);
 extern bool skb_recycle_check(struct sk_buff *skb, int skb_size);
 
 extern struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
@@ -2484,5 +2485,25 @@ static inline void skb_checksum_none_assert(struct sk_buff *skb)
 
 bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
 
+static inline bool skb_is_recycleable(struct sk_buff *skb, int skb_size)
+{
+        if (irqs_disabled())
+                return false;
+
+        if (skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY)
+                return false;
+
+        if (skb_is_nonlinear(skb) || skb->fclone != SKB_FCLONE_UNAVAILABLE)
+                return false;
+
+        skb_size = SKB_DATA_ALIGN(skb_size + NET_SKB_PAD);
+        if (skb_end_pointer(skb) - skb->head < skb_size)
+                return false;
+
+        if (skb_shared(skb) || skb_cloned(skb))
+                return false;
+
+        return true;
+}
 #endif  /* __KERNEL__ */
 #endif  /* _LINUX_SKBUFF_H */