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2024-11-01 2f529f9b558ca1c1bd74be7437a84e4711743404

 kernel/include/linux/netdevice.h
..
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@@ -41,6 +41,7 @@
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 #endif
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 #include <net/netprio_cgroup.h>
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 #include <net/xdp.h>
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+#include <net/netoob.h>
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 #include <linux/netdev_features.h>
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 #include <linux/neighbour.h>
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@@ -296,6 +297,7 @@
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 	__LINK_STATE_LINKWATCH_PENDING,
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 	__LINK_STATE_DORMANT,
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 	__LINK_STATE_TESTING,
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+	__LINK_STATE_OOB,
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 };
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@@ -1534,6 +1536,13 @@
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 	ANDROID_KABI_RESERVE(6);
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 	ANDROID_KABI_RESERVE(7);
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 	ANDROID_KABI_RESERVE(8);
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+#ifdef CONFIG_NET_OOB
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+	struct sk_buff *	(*ndo_alloc_oob_skb)(struct net_device *dev,
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+						     dma_addr_t *dma_addr);
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+	void			(*ndo_free_oob_skb)(struct net_device *dev,
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+						    struct sk_buff *skb,
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+						    dma_addr_t dma_addr);
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+#endif
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 };
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 /**
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@@ -1725,6 +1734,7 @@
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  *	@tlsdev_ops:	Transport Layer Security offload operations
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  *	@header_ops:	Includes callbacks for creating,parsing,caching,etc
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  *			of Layer 2 headers.
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+ *	@net_oob_context:	Out-of-band networking context (oob stage diversion)
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  *
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  *	@flags:		Interface flags (a la BSD)
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  *	@priv_flags:	Like 'flags' but invisible to userspace,
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@@ -1982,6 +1992,10 @@
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 #if IS_ENABLED(CONFIG_TLS_DEVICE)
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 	const struct tlsdev_ops *tlsdev_ops;
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+#endif
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+
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+#ifdef CONFIG_NET_OOB
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+	struct oob_netdev_context  oob_context;
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 #endif
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 	const struct header_ops *header_ops;
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@@ -4190,6 +4204,86 @@
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 void netif_device_attach(struct net_device *dev);
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+#ifdef CONFIG_NET_OOB
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+
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+static inline bool netif_oob_diversion(const struct net_device *dev)
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+{
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+	return test_bit(__LINK_STATE_OOB, &dev->state);
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+}
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+
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+static inline void netif_enable_oob_diversion(struct net_device *dev)
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+{
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+	return set_bit(__LINK_STATE_OOB, &dev->state);
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+}
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+
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+static inline void netif_disable_oob_diversion(struct net_device *dev)
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+{
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+	clear_bit(__LINK_STATE_OOB, &dev->state);
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+	smp_mb__after_atomic();
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+}
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+
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+int netif_xmit_oob(struct sk_buff *skb);
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+
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+static inline bool netdev_is_oob_capable(struct net_device *dev)
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+{
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+	return !!(dev->oob_context.flags & IFF_OOB_CAPABLE);
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+}
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+
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+static inline void netdev_enable_oob_port(struct net_device *dev)
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+{
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+	dev->oob_context.flags |= IFF_OOB_PORT;
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+}
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+
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+static inline void netdev_disable_oob_port(struct net_device *dev)
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+{
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+	dev->oob_context.flags &= ~IFF_OOB_PORT;
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+}
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+
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+static inline bool netdev_is_oob_port(struct net_device *dev)
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+{
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+	return !!(dev->oob_context.flags & IFF_OOB_PORT);
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+}
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+
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+static inline struct sk_buff *netdev_alloc_oob_skb(struct net_device *dev,
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+						   dma_addr_t *dma_addr)
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+{
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+	return dev->netdev_ops->ndo_alloc_oob_skb(dev, dma_addr);
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+}
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+
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+static inline void netdev_free_oob_skb(struct net_device *dev,
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+				       struct sk_buff *skb,
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+				       dma_addr_t dma_addr)
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+{
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+	dev->netdev_ops->ndo_free_oob_skb(dev, skb, dma_addr);
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+}
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+
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+#else
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+
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+static inline bool netif_oob_diversion(const struct net_device *dev)
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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 netdev_is_oob_capable(struct net_device *dev)
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+{
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+	return false;
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+}
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+
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+static inline void netdev_enable_oob_port(struct net_device *dev)
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+{
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+}
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+
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+static inline void netdev_disable_oob_port(struct net_device *dev)
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+{
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+}
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+
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+static inline bool netdev_is_oob_port(struct net_device *dev)
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+{
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+	return false;
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+}
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+
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+#endif
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+
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 /*
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  * Network interface message level settings
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  */