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2024-11-01 2f529f9b558ca1c1bd74be7437a84e4711743404

 kernel/include/linux/skbuff.h
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@@ -793,6 +793,12 @@
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 #ifdef CONFIG_SKB_EXTENSIONS
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 	__u8			active_extensions;
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 #endif
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+#ifdef CONFIG_NET_OOB
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+	__u8			oob:1;
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+	__u8			oob_clone:1;
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+	__u8			oob_cloned:1;
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+#endif
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+
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 	/* fields enclosed in headers_start/headers_end are copied
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 	 * using a single memcpy() in __copy_skb_header()
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 	 */
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@@ -1102,6 +1108,69 @@
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 struct sk_buff *build_skb(void *data, unsigned int frag_size);
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 struct sk_buff *build_skb_around(struct sk_buff *skb,
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 				 void *data, unsigned int frag_size);
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+#ifdef CONFIG_NET_OOB
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+
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+static inline void __skb_oob_copy(struct sk_buff *new,
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+				const struct sk_buff *old)
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+{
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+	new->oob = old->oob;
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+	new->oob_clone = old->oob_clone;
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+	new->oob_cloned = old->oob_cloned;
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+}
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+
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+static inline bool skb_is_oob(const struct sk_buff *skb)
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+{
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+	return skb->oob;
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+}
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+
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+static inline bool skb_is_oob_clone(const struct sk_buff *skb)
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+{
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+	return skb->oob_clone;
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+}
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+
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+static inline bool skb_has_oob_clone(const struct sk_buff *skb)
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+{
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+	return skb->oob_cloned;
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+}
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+
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+struct sk_buff *__netdev_alloc_oob_skb(struct net_device *dev,
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+				size_t len, size_t headroom,
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+				gfp_t gfp_mask);
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+void __netdev_free_oob_skb(struct net_device *dev, struct sk_buff *skb);
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+void netdev_reset_oob_skb(struct net_device *dev, struct sk_buff *skb,
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+			size_t headroom);
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+struct sk_buff *skb_alloc_oob_head(gfp_t gfp_mask);
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+void skb_morph_oob_skb(struct sk_buff *n, struct sk_buff *skb);
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+bool skb_release_oob_skb(struct sk_buff *skb, int *dref);
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+
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+static inline bool recycle_oob_skb(struct sk_buff *skb)
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+{
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+	bool skb_oob_recycle(struct sk_buff *skb);
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+
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+	if (!skb->oob)
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+		return false;
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+
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+	return skb_oob_recycle(skb);
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+}
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+
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+#else  /* !CONFIG_NET_OOB */
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+
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+static inline void __skb_oob_copy(struct sk_buff *new,
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+				const struct sk_buff *old)
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+{
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+}
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+
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+static inline bool skb_is_oob(const struct sk_buff *skb)
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+{
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+	return false;
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+}
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+
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+static inline bool recycle_oob_skb(struct sk_buff *skb)
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+{
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+	return false;
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+}
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+
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+#endif	/* !CONFIG_NET_OOB */
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 /**
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  * alloc_skb - allocate a network buffer