26 files changed, 587 insertions, 89 deletions

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 57b738b78073..08f4c6191e72 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -55,8 +55,7 @@ struct devlink {
 			    * port, sb, dpipe, resource, params, region, traps and more.
 			    */
 	u8 reload_failed:1,
-	   reload_enabled:1,
-	   registered:1;
+	   reload_enabled:1;
 	char priv[0] __aligned(NETDEV_ALIGN);
 };
 
@@ -158,7 +157,6 @@ struct devlink_port {
 	struct list_head region_list;
 	struct devlink *devlink;
 	unsigned int index;
-	bool registered;
 	spinlock_t type_lock; /* Protects type and type_dev
 			       * pointer consistency.
 			       */
@@ -1542,8 +1540,18 @@ static inline struct devlink *netdev_to_devlink(struct net_device *dev)
 struct ib_device;
 
 struct net *devlink_net(const struct devlink *devlink);
-void devlink_net_set(struct devlink *devlink, struct net *net);
-struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);
+/* This call is intended for software devices that can create
+ * devlink instances in other namespaces than init_net.
+ *
+ * Drivers that operate on real HW must use devlink_alloc() instead.
+ */
+struct devlink *devlink_alloc_ns(const struct devlink_ops *ops,
+				 size_t priv_size, struct net *net);
+static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,
+					    size_t priv_size)
+{
+	return devlink_alloc_ns(ops, priv_size, &init_net);
+}
 int devlink_register(struct devlink *devlink, struct device *dev);
 void devlink_unregister(struct devlink *devlink);
 void devlink_reload_enable(struct devlink *devlink);
diff --git a/include/net/dn_fib.h b/include/net/dn_fib.h
index ccc6e9df178b..ddd6565957b3 100644
--- a/include/net/dn_fib.h
+++ b/include/net/dn_fib.h
@@ -29,7 +29,7 @@ struct dn_fib_nh {
 struct dn_fib_info {
 	struct dn_fib_info	*fib_next;
 	struct dn_fib_info	*fib_prev;
-	int 			fib_treeref;
+	refcount_t		fib_treeref;
 	refcount_t		fib_clntref;
 	int			fib_dead;
 	unsigned int		fib_flags;
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 33f40c1ec379..2af6ee2f2bfb 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -88,11 +88,6 @@ struct dsa_device_ops {
 			       struct packet_type *pt);
 	void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
 			     int *offset);
-	/* Used to determine which traffic should match the DSA filter in
-	 * eth_type_trans, and which, if any, should bypass it and be processed
-	 * as regular on the master net device.
-	 */
-	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
 	unsigned int needed_headroom;
 	unsigned int needed_tailroom;
 	const char *name;
@@ -111,8 +106,8 @@ struct dsa_device_ops {
  * function pointers.
  */
 struct dsa_netdevice_ops {
-	int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr,
-			    int cmd);
+	int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr,
+			     int cmd);
 };
 
 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
@@ -159,6 +154,12 @@ struct dsa_switch_tree {
 	 */
 	struct net_device **lags;
 	unsigned int lags_len;
+
+	/* Track the largest switch index within a tree */
+	unsigned int last_switch;
+
+	/* Track the bridges with forwarding offload enabled */
+	unsigned long fwd_offloading_bridges;
 };
 
 #define dsa_lags_foreach_id(_id, _dst)				\
@@ -240,7 +241,6 @@ struct dsa_port {
 	struct dsa_switch_tree *dst;
 	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
 			       struct packet_type *pt);
-	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
 
 	enum {
 		DSA_PORT_TYPE_UNUSED = 0,
@@ -259,6 +259,7 @@ struct dsa_port {
 	bool			vlan_filtering;
 	u8			stp_state;
 	struct net_device	*bridge_dev;
+	int			bridge_num;
 	struct devlink_port	devlink_port;
 	bool			devlink_port_setup;
 	struct phylink		*pl;
@@ -352,6 +353,9 @@ struct dsa_switch {
 	unsigned int ageing_time_min;
 	unsigned int ageing_time_max;
 
+	/* Storage for drivers using tag_8021q */
+	struct dsa_8021q_context *tag_8021q_ctx;
+
 	/* devlink used to represent this switch device */
 	struct devlink		*devlink;
 
@@ -407,6 +411,12 @@ struct dsa_switch {
 	 */
 	unsigned int		num_lag_ids;
 
+	/* Drivers that support bridge forwarding offload should set this to
+	 * the maximum number of bridges spanning the same switch tree that can
+	 * be offloaded.
+	 */
+	unsigned int		num_fwd_offloading_bridges;
+
 	size_t num_ports;
 };
 
@@ -690,6 +700,14 @@ struct dsa_switch_ops {
 				    struct net_device *bridge);
 	void	(*port_bridge_leave)(struct dsa_switch *ds, int port,
 				     struct net_device *bridge);
+	/* Called right after .port_bridge_join() */
+	int	(*port_bridge_tx_fwd_offload)(struct dsa_switch *ds, int port,
+					      struct net_device *bridge,
+					      int bridge_num);
+	/* Called right before .port_bridge_leave() */
+	void	(*port_bridge_tx_fwd_unoffload)(struct dsa_switch *ds, int port,
+						struct net_device *bridge,
+						int bridge_num);
 	void	(*port_stp_state_set)(struct dsa_switch *ds, int port,
 				      u8 state);
 	void	(*port_fast_age)(struct dsa_switch *ds, int port);
@@ -869,6 +887,13 @@ struct dsa_switch_ops {
 					  const struct switchdev_obj_ring_role_mrp *mrp);
 	int	(*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
 					  const struct switchdev_obj_ring_role_mrp *mrp);
+
+	/*
+	 * tag_8021q operations
+	 */
+	int	(*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
+				      u16 flags);
+	int	(*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
 };
 
 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)		\
@@ -954,15 +979,6 @@ static inline bool netdev_uses_dsa(const struct net_device *dev)
 	return false;
 }
 
-static inline bool dsa_can_decode(const struct sk_buff *skb,
-				  struct net_device *dev)
-{
-#if IS_ENABLED(CONFIG_NET_DSA)
-	return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
-#endif
-	return false;
-}
-
 /* All DSA tags that push the EtherType to the right (basically all except tail
  * tags, which don't break dissection) can be treated the same from the
  * perspective of the flow dissector.
@@ -1003,8 +1019,8 @@ static inline int __dsa_netdevice_ops_check(struct net_device *dev)
 	return 0;
 }
 
-static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
-				   int cmd)
+static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
+				    int cmd)
 {
 	const struct dsa_netdevice_ops *ops;
 	int err;
@@ -1015,11 +1031,11 @@ static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
 
 	ops = dev->dsa_ptr->netdev_ops;
 
-	return ops->ndo_do_ioctl(dev, ifr, cmd);
+	return ops->ndo_eth_ioctl(dev, ifr, cmd);
 }
 #else
-static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
-				   int cmd)
+static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
+				    int cmd)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/include/net/dst.h b/include/net/dst.h
index 75b1e734e9c2..a057319aabef 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -277,6 +277,7 @@ static inline void skb_dst_drop(struct sk_buff *skb)
 
 static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
 {
+	nskb->slow_gro |= !!refdst;
 	nskb->_skb_refdst = refdst;
 	if (!(nskb->_skb_refdst & SKB_DST_NOREF))
 		dst_clone(skb_dst(nskb));
@@ -316,6 +317,7 @@ static inline bool skb_dst_force(struct sk_buff *skb)
 			dst = NULL;
 
 		skb->_skb_refdst = (unsigned long)dst;
+		skb->slow_gro |= !!dst;
 	}
 
 	return skb->_skb_refdst != 0UL;
diff --git a/include/net/ioam6.h b/include/net/ioam6.h
new file mode 100644
index 000000000000..3c2993bc48c8
--- /dev/null
+++ b/include/net/ioam6.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *  IPv6 IOAM implementation
+ *
+ *  Author:
+ *  Justin Iurman <justin.iurman@uliege.be>
+ */
+
+#ifndef _NET_IOAM6_H
+#define _NET_IOAM6_H
+
+#include <linux/net.h>
+#include <linux/ipv6.h>
+#include <linux/ioam6.h>
+#include <linux/rhashtable-types.h>
+
+struct ioam6_namespace {
+	struct rhash_head head;
+	struct rcu_head rcu;
+
+	struct ioam6_schema __rcu *schema;
+
+	__be16 id;
+	__be32 data;
+	__be64 data_wide;
+};
+
+struct ioam6_schema {
+	struct rhash_head head;
+	struct rcu_head rcu;
+
+	struct ioam6_namespace __rcu *ns;
+
+	u32 id;
+	int len;
+	__be32 hdr;
+
+	u8 data[0];
+};
+
+struct ioam6_pernet_data {
+	struct mutex lock;
+	struct rhashtable namespaces;
+	struct rhashtable schemas;
+};
+
+static inline struct ioam6_pernet_data *ioam6_pernet(struct net *net)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	return net->ipv6.ioam6_data;
+#else
+	return NULL;
+#endif
+}
+
+struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id);
+void ioam6_fill_trace_data(struct sk_buff *skb,
+			   struct ioam6_namespace *ns,
+			   struct ioam6_trace_hdr *trace);
+
+int ioam6_init(void);
+void ioam6_exit(void);
+
+int ioam6_iptunnel_init(void);
+void ioam6_iptunnel_exit(void);
+
+#endif /* _NET_IOAM6_H */
diff --git a/include/net/ip.h b/include/net/ip.h
index d9683bef8684..9192444f2964 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -436,18 +436,32 @@ static inline bool ip_sk_ignore_df(const struct sock *sk)
 static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
 						    bool forwarding)
 {
+	const struct rtable *rt = container_of(dst, struct rtable, dst);
 	struct net *net = dev_net(dst->dev);
 	unsigned int mtu;
 
 	if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
 	    ip_mtu_locked(dst) ||
-	    !forwarding)
-		return dst_mtu(dst);
+	    !forwarding) {
+		mtu = rt->rt_pmtu;
+		if (mtu && time_before(jiffies, rt->dst.expires))
+			goto out;
+	}
 
 	/* 'forwarding = true' case should always honour route mtu */
 	mtu = dst_metric_raw(dst, RTAX_MTU);
-	if (!mtu)
-		mtu = min(READ_ONCE(dst->dev->mtu), IP_MAX_MTU);
+	if (mtu)
+		goto out;
+
+	mtu = READ_ONCE(dst->dev->mtu);
+
+	if (unlikely(ip_mtu_locked(dst))) {
+		if (rt->rt_uses_gateway && mtu > 576)
+			mtu = 576;
+	}
+
+out:
+	mtu = min_t(unsigned int, mtu, IP_MAX_MTU);
 
 	return mtu - lwtunnel_headroom(dst->lwtstate, mtu);
 }
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 625a38ccb5d9..820eae3ea95f 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -316,12 +316,13 @@ static inline bool rt6_duplicate_nexthop(struct fib6_info *a, struct fib6_info *
 	       !lwtunnel_cmp_encap(nha->fib_nh_lws, nhb->fib_nh_lws);
 }
 
-static inline unsigned int ip6_dst_mtu_forward(const struct dst_entry *dst)
+static inline unsigned int ip6_dst_mtu_maybe_forward(const struct dst_entry *dst,
+						     bool forwarding)
 {
 	struct inet6_dev *idev;
 	unsigned int mtu;
 
-	if (dst_metric_locked(dst, RTAX_MTU)) {
+	if (!forwarding || dst_metric_locked(dst, RTAX_MTU)) {
 		mtu = dst_metric_raw(dst, RTAX_MTU);
 		if (mtu)
 			goto out;
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 3ab2563b1a23..21c5386d4a6d 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -133,7 +133,7 @@ struct fib_info {
 	struct hlist_node	fib_lhash;
 	struct list_head	nh_list;
 	struct net		*fib_net;
-	int			fib_treeref;
+	refcount_t		fib_treeref;
 	refcount_t		fib_clntref;
 	unsigned int		fib_flags;
 	unsigned char		fib_dead;
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 548b65bd3973..bc3b13ec93c9 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -270,7 +270,8 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 		       const u8 proto, int tunnel_hlen);
 int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd);
-int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+			     void __user *data, int cmd);
 int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
 int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
 
diff --git a/include/net/llc_pdu.h b/include/net/llc_pdu.h
index c0f0a13ed818..49aa79c7b278 100644
--- a/include/net/llc_pdu.h
+++ b/include/net/llc_pdu.h
@@ -15,9 +15,11 @@
 #include <linux/if_ether.h>
 
 /* Lengths of frame formats */
-#define LLC_PDU_LEN_I	4       /* header and 2 control bytes */
-#define LLC_PDU_LEN_S	4
-#define LLC_PDU_LEN_U	3       /* header and 1 control byte */
+#define LLC_PDU_LEN_I		4       /* header and 2 control bytes */
+#define LLC_PDU_LEN_S		4
+#define LLC_PDU_LEN_U		3       /* header and 1 control byte */
+/* header and 1 control byte and XID info */
+#define LLC_PDU_LEN_U_XID	(LLC_PDU_LEN_U + sizeof(struct llc_xid_info))
 /* Known SAP addresses */
 #define LLC_GLOBAL_SAP	0xFF
 #define LLC_NULL_SAP	0x00	/* not network-layer visible */
@@ -50,9 +52,10 @@
 #define LLC_PDU_TYPE_U_MASK    0x03	/* 8-bit control field */
 #define LLC_PDU_TYPE_MASK      0x03
 
-#define LLC_PDU_TYPE_I	0	/* first bit */
-#define LLC_PDU_TYPE_S	1	/* first two bits */
-#define LLC_PDU_TYPE_U	3	/* first two bits */
+#define LLC_PDU_TYPE_I		0	/* first bit */
+#define LLC_PDU_TYPE_S		1	/* first two bits */
+#define LLC_PDU_TYPE_U		3	/* first two bits */
+#define LLC_PDU_TYPE_U_XID	4	/* private type for detecting XID commands */
 
 #define LLC_PDU_TYPE_IS_I(pdu) \
 	((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 1 : 0)
@@ -230,9 +233,18 @@ static inline struct llc_pdu_un *llc_pdu_un_hdr(struct sk_buff *skb)
 static inline void llc_pdu_header_init(struct sk_buff *skb, u8 type,
 				       u8 ssap, u8 dsap, u8 cr)
 {
-	const int hlen = type == LLC_PDU_TYPE_U ? 3 : 4;
+	int hlen = 4; /* default value for I and S types */
 	struct llc_pdu_un *pdu;
 
+	switch (type) {
+	case LLC_PDU_TYPE_U:
+		hlen = 3;
+		break;
+	case LLC_PDU_TYPE_U_XID:
+		hlen = 6;
+		break;
+	}
+
 	skb_push(skb, hlen);
 	skb_reset_network_header(skb);
 	pdu = llc_pdu_un_hdr(skb);
@@ -374,7 +386,10 @@ static inline void llc_pdu_init_as_xid_cmd(struct sk_buff *skb,
 	xid_info->fmt_id = LLC_XID_FMT_ID;	/* 0x81 */
 	xid_info->type	 = svcs_supported;
 	xid_info->rw	 = rx_window << 1;	/* size of receive window */
-	skb_put(skb, sizeof(struct llc_xid_info));
+
+	/* no need to push/put since llc_pdu_header_init() has already
+	 * pushed 3 + 3 bytes
+	 */
 }
 
 /**
diff --git a/include/net/mctp.h b/include/net/mctp.h
new file mode 100644
index 000000000000..54bbe042c973
--- /dev/null
+++ b/include/net/mctp.h
@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Management Component Transport Protocol (MCTP)
+ *
+ * Copyright (c) 2021 Code Construct
+ * Copyright (c) 2021 Google
+ */
+
+#ifndef __NET_MCTP_H
+#define __NET_MCTP_H
+
+#include <linux/bits.h>
+#include <linux/mctp.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+
+/* MCTP packet definitions */
+struct mctp_hdr {
+	u8	ver;
+	u8	dest;
+	u8	src;
+	u8	flags_seq_tag;
+};
+
+#define MCTP_VER_MIN	1
+#define MCTP_VER_MAX	1
+
+/* Definitions for flags_seq_tag field */
+#define MCTP_HDR_FLAG_SOM	BIT(7)
+#define MCTP_HDR_FLAG_EOM	BIT(6)
+#define MCTP_HDR_FLAG_TO	BIT(3)
+#define MCTP_HDR_FLAGS		GENMASK(5, 3)
+#define MCTP_HDR_SEQ_SHIFT	4
+#define MCTP_HDR_SEQ_MASK	GENMASK(1, 0)
+#define MCTP_HDR_TAG_SHIFT	0
+#define MCTP_HDR_TAG_MASK	GENMASK(2, 0)
+
+#define MCTP_HEADER_MAXLEN	4
+
+#define MCTP_INITIAL_DEFAULT_NET	1
+
+static inline bool mctp_address_ok(mctp_eid_t eid)
+{
+	return eid >= 8 && eid < 255;
+}
+
+static inline struct mctp_hdr *mctp_hdr(struct sk_buff *skb)
+{
+	return (struct mctp_hdr *)skb_network_header(skb);
+}
+
+/* socket implementation */
+struct mctp_sock {
+	struct sock	sk;
+
+	/* bind() params */
+	int		bind_net;
+	mctp_eid_t	bind_addr;
+	__u8		bind_type;
+
+	/* list of mctp_sk_key, for incoming tag lookup. updates protected
+	 * by sk->net->keys_lock
+	 */
+	struct hlist_head keys;
+};
+
+/* Key for matching incoming packets to sockets or reassembly contexts.
+ * Packets are matched on (src,dest,tag).
+ *
+ * Lifetime requirements:
+ *
+ *  - keys are free()ed via RCU
+ *
+ *  - a mctp_sk_key contains a reference to a struct sock; this is valid
+ *    for the life of the key. On sock destruction (through unhash), the key is
+ *    removed from lists (see below), and will not be observable after a RCU
+ *    grace period.
+ *
+ *    any RX occurring within that grace period may still queue to the socket,
+ *    but will hit the SOCK_DEAD case before the socket is freed.
+ *
+ * - these mctp_sk_keys appear on two lists:
+ *     1) the struct mctp_sock->keys list
+ *     2) the struct netns_mctp->keys list
+ *
+ *        updates to either list are performed under the netns_mctp->keys
+ *        lock.
+ *
+ * - a key may have a sk_buff attached as part of an in-progress message
+ *   reassembly (->reasm_head). The reassembly context is protected by
+ *   reasm_lock, which may be acquired with the keys lock (above) held, if
+ *   necessary. Consequently, keys lock *cannot* be acquired with the
+ *   reasm_lock held.
+ *
+ * - there are two destruction paths for a mctp_sk_key:
+ *
+ *    - through socket unhash (see mctp_sk_unhash). This performs the list
+ *      removal under keys_lock.
+ *
+ *    - where a key is established to receive a reply message: after receiving
+ *      the (complete) reply, or during reassembly errors. Here, we clean up
+ *      the reassembly context (marking reasm_dead, to prevent another from
+ *      starting), and remove the socket from the netns & socket lists.
+ */
+struct mctp_sk_key {
+	mctp_eid_t	peer_addr;
+	mctp_eid_t	local_addr;
+	__u8		tag; /* incoming tag match; invert TO for local */
+
+	/* we hold a ref to sk when set */
+	struct sock	*sk;
+
+	/* routing lookup list */
+	struct hlist_node hlist;
+
+	/* per-socket list */
+	struct hlist_node sklist;
+
+	/* incoming fragment reassembly context */
+	spinlock_t	reasm_lock;
+	struct sk_buff	*reasm_head;
+	struct sk_buff	**reasm_tailp;
+	bool		reasm_dead;
+	u8		last_seq;
+
+	struct rcu_head	rcu;
+};
+
+struct mctp_skb_cb {
+	unsigned int	magic;
+	unsigned int	net;
+	mctp_eid_t	src;
+};
+
+/* skb control-block accessors with a little extra debugging for initial
+ * development.
+ *
+ * TODO: remove checks & mctp_skb_cb->magic; replace callers of __mctp_cb
+ * with mctp_cb().
+ *
+ * __mctp_cb() is only for the initial ingress code; we should see ->magic set
+ * at all times after this.
+ */
+static inline struct mctp_skb_cb *__mctp_cb(struct sk_buff *skb)
+{
+	struct mctp_skb_cb *cb = (void *)skb->cb;
+
+	cb->magic = 0x4d435450;
+	return cb;
+}
+
+static inline struct mctp_skb_cb *mctp_cb(struct sk_buff *skb)
+{
+	struct mctp_skb_cb *cb = (void *)skb->cb;
+
+	WARN_ON(cb->magic != 0x4d435450);
+	return (void *)(skb->cb);
+}
+
+/* Route definition.
+ *
+ * These are held in the pernet->mctp.routes list, with RCU protection for
+ * removed routes. We hold a reference to the netdev; routes need to be
+ * dropped on NETDEV_UNREGISTER events.
+ *
+ * Updates to the route table are performed under rtnl; all reads under RCU,
+ * so routes cannot be referenced over a RCU grace period. Specifically: A
+ * caller cannot block between mctp_route_lookup and passing the route to
+ * mctp_do_route.
+ */
+struct mctp_route {
+	mctp_eid_t		min, max;
+
+	struct mctp_dev		*dev;
+	unsigned int		mtu;
+	int			(*output)(struct mctp_route *route,
+					  struct sk_buff *skb);
+
+	struct list_head	list;
+	refcount_t		refs;
+	struct rcu_head		rcu;
+};
+
+/* route interfaces */
+struct mctp_route *mctp_route_lookup(struct net *net, unsigned int dnet,
+				     mctp_eid_t daddr);
+
+int mctp_do_route(struct mctp_route *rt, struct sk_buff *skb);
+
+int mctp_local_output(struct sock *sk, struct mctp_route *rt,
+		      struct sk_buff *skb, mctp_eid_t daddr, u8 req_tag);
+
+/* routing <--> device interface */
+unsigned int mctp_default_net(struct net *net);
+int mctp_default_net_set(struct net *net, unsigned int index);
+int mctp_route_add_local(struct mctp_dev *mdev, mctp_eid_t addr);
+int mctp_route_remove_local(struct mctp_dev *mdev, mctp_eid_t addr);
+void mctp_route_remove_dev(struct mctp_dev *mdev);
+
+/* neighbour definitions */
+enum mctp_neigh_source {
+	MCTP_NEIGH_STATIC,
+	MCTP_NEIGH_DISCOVER,
+};
+
+struct mctp_neigh {
+	struct mctp_dev		*dev;
+	mctp_eid_t		eid;
+	enum mctp_neigh_source	source;
+
+	unsigned char		ha[MAX_ADDR_LEN];
+
+	struct list_head	list;
+	struct rcu_head		rcu;
+};
+
+int mctp_neigh_init(void);
+void mctp_neigh_exit(void);
+
+// ret_hwaddr may be NULL, otherwise must have space for MAX_ADDR_LEN
+int mctp_neigh_lookup(struct mctp_dev *dev, mctp_eid_t eid,
+		      void *ret_hwaddr);
+void mctp_neigh_remove_dev(struct mctp_dev *mdev);
+
+int mctp_routes_init(void);
+void mctp_routes_exit(void);
+
+void mctp_device_init(void);
+void mctp_device_exit(void);
+
+#endif /* __NET_MCTP_H */
diff --git a/include/net/mctpdevice.h b/include/net/mctpdevice.h
new file mode 100644
index 000000000000..57e773ff08bb
--- /dev/null
+++ b/include/net/mctpdevice.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Management Component Transport Protocol (MCTP) - device
+ * definitions.
+ *
+ * Copyright (c) 2021 Code Construct
+ * Copyright (c) 2021 Google
+ */
+
+#ifndef __NET_MCTPDEVICE_H
+#define __NET_MCTPDEVICE_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/refcount.h>
+
+struct mctp_dev {
+	struct net_device	*dev;
+
+	unsigned int		net;
+
+	/* Only modified under RTNL. Reads have addrs_lock held */
+	u8			*addrs;
+	size_t			num_addrs;
+	spinlock_t		addrs_lock;
+
+	struct rcu_head		rcu;
+};
+
+#define MCTP_INITIAL_DEFAULT_NET	1
+
+struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev);
+struct mctp_dev *__mctp_dev_get(const struct net_device *dev);
+struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev);
+
+#endif /* __NET_MCTPDEVICE_H */
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 12cf6d7ea62c..cc54750dd3db 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -34,6 +34,7 @@
 #include <net/netns/xdp.h>
 #include <net/netns/smc.h>
 #include <net/netns/bpf.h>
+#include <net/netns/mctp.h>
 #include <linux/ns_common.h>
 #include <linux/idr.h>
 #include <linux/skbuff.h>
@@ -167,6 +168,9 @@ struct net {
 #ifdef CONFIG_XDP_SOCKETS
 	struct netns_xdp	xdp;
 #endif
+#if IS_ENABLED(CONFIG_MCTP)
+	struct netns_mctp	mctp;
+#endif
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	struct sock		*crypto_nlsk;
 #endif
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 1ceec518ab49..7a2a9d3144ba 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -885,7 +885,7 @@ static inline int nlmsg_validate_deprecated(const struct nlmsghdr *nlh,
  */
 static inline int nlmsg_report(const struct nlmsghdr *nlh)
 {
-	return !!(nlh->nlmsg_flags & NLM_F_ECHO);
+	return nlh ? !!(nlh->nlmsg_flags & NLM_F_ECHO) : 0;
 }
 
 /**
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index b8620519eace..2f65701a43c9 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -174,7 +174,6 @@ struct netns_ipv4 {
 	int sysctl_tcp_fastopen;
 	const struct tcp_congestion_ops __rcu  *tcp_congestion_control;
 	struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
-	spinlock_t tcp_fastopen_ctx_lock;
 	unsigned int sysctl_tcp_fastopen_blackhole_timeout;
 	atomic_t tfo_active_disable_times;
 	unsigned long tfo_active_disable_stamp;
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index bde0b7adb4a3..a4b550380316 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -51,6 +51,8 @@ struct netns_sysctl_ipv6 {
 	int max_dst_opts_len;
 	int max_hbh_opts_len;
 	int seg6_flowlabel;
+	u32 ioam6_id;
+	u64 ioam6_id_wide;
 	bool skip_notify_on_dev_down;
 	u8 fib_notify_on_flag_change;
 };
@@ -110,6 +112,7 @@ struct netns_ipv6 {
 		spinlock_t	lock;
 		u32		seq;
 	} ip6addrlbl_table;
+	struct ioam6_pernet_data *ioam6_data;
 };
 
 #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
diff --git a/include/net/netns/mctp.h b/include/net/netns/mctp.h
new file mode 100644
index 000000000000..acedef12a35e
--- /dev/null
+++ b/include/net/netns/mctp.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * MCTP per-net structures
+ */
+
+#ifndef __NETNS_MCTP_H__
+#define __NETNS_MCTP_H__
+
+#include <linux/types.h>
+
+struct netns_mctp {
+	/* Only updated under RTNL, entries freed via RCU */
+	struct list_head routes;
+
+	/* Bound sockets: list of sockets bound by type.
+	 * This list is updated from non-atomic contexts (under bind_lock),
+	 * and read (under rcu) in packet rx
+	 */
+	struct mutex bind_lock;
+	struct hlist_head binds;
+
+	/* tag allocations. This list is read and updated from atomic contexts,
+	 * but elements are free()ed after a RCU grace-period
+	 */
+	spinlock_t keys_lock;
+	struct hlist_head keys;
+
+	/* MCTP network */
+	unsigned int default_net;
+
+	/* neighbour table */
+	struct mutex neigh_lock;
+	struct list_head neighbours;
+};
+
+#endif /* __NETNS_MCTP_H__ */
diff --git a/include/net/nfc/digital.h b/include/net/nfc/digital.h
index 963db96bcbbb..bb3e8fdc0692 100644
--- a/include/net/nfc/digital.h
+++ b/include/net/nfc/digital.h
@@ -191,7 +191,7 @@ struct digital_poll_tech {
 
 struct nfc_digital_dev {
 	struct nfc_dev *nfc_dev;
-	struct nfc_digital_ops *ops;
+	const struct nfc_digital_ops *ops;
 
 	u32 protocols;
 
@@ -236,7 +236,7 @@ struct nfc_digital_dev {
 	void (*skb_add_crc)(struct sk_buff *skb);
 };
 
-struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
+struct nfc_digital_dev *nfc_digital_allocate_device(const struct nfc_digital_ops *ops,
 						    __u32 supported_protocols,
 						    __u32 driver_capabilities,
 						    int tx_headroom,
diff --git a/include/net/nfc/hci.h b/include/net/nfc/hci.h
index b35f37a57686..756c11084f65 100644
--- a/include/net/nfc/hci.h
+++ b/include/net/nfc/hci.h
@@ -118,7 +118,7 @@ struct nfc_hci_dev {
 
 	struct sk_buff_head msg_rx_queue;
 
-	struct nfc_hci_ops *ops;
+	const struct nfc_hci_ops *ops;
 
 	struct nfc_llc *llc;
 
@@ -151,7 +151,7 @@ struct nfc_hci_dev {
 };
 
 /* hci device allocation */
-struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
+struct nfc_hci_dev *nfc_hci_allocate_device(const struct nfc_hci_ops *ops,
 					    struct nfc_hci_init_data *init_data,
 					    unsigned long quirks,
 					    u32 protocols,
@@ -168,7 +168,7 @@ void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata);
 void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev);
 
 static inline int nfc_hci_set_vendor_cmds(struct nfc_hci_dev *hdev,
-					  struct nfc_vendor_cmd *cmds,
+					  const struct nfc_vendor_cmd *cmds,
 					  int n_cmds)
 {
 	return nfc_set_vendor_cmds(hdev->ndev, cmds, n_cmds);
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index 1df0f8074c9d..4770a81f4aa7 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -82,10 +82,10 @@ struct nci_ops {
 	void  (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd,
 				  struct sk_buff *skb);
 
-	struct nci_driver_ops *prop_ops;
+	const struct nci_driver_ops *prop_ops;
 	size_t n_prop_ops;
 
-	struct nci_driver_ops *core_ops;
+	const struct nci_driver_ops *core_ops;
 	size_t n_core_ops;
 };
 
@@ -194,7 +194,7 @@ struct nci_hci_dev {
 /* NCI Core structures */
 struct nci_dev {
 	struct nfc_dev		*nfc_dev;
-	struct nci_ops		*ops;
+	const struct nci_ops	*ops;
 	struct nci_hci_dev	*hci_dev;
 
 	int			tx_headroom;
@@ -267,7 +267,7 @@ struct nci_dev {
 };
 
 /* ----- NCI Devices ----- */
-struct nci_dev *nci_allocate_device(struct nci_ops *ops,
+struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
 				    __u32 supported_protocols,
 				    int tx_headroom,
 				    int tx_tailroom);
@@ -278,23 +278,25 @@ int nci_request(struct nci_dev *ndev,
 		void (*req)(struct nci_dev *ndev,
 			    unsigned long opt),
 		unsigned long opt, __u32 timeout);
-int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload);
-int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload);
+int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len,
+		 const __u8 *payload);
+int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
+		 const __u8 *payload);
 int nci_core_reset(struct nci_dev *ndev);
 int nci_core_init(struct nci_dev *ndev);
 
 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb);
-int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
+int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val);
 
 int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
 			 u8 number_destination_params,
 			 size_t params_len,
-			 struct core_conn_create_dest_spec_params *params);
+			 const struct core_conn_create_dest_spec_params *params);
 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
-int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
+int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
 		      struct sk_buff **resp);
 
 struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
@@ -343,7 +345,7 @@ static inline void *nci_get_drvdata(struct nci_dev *ndev)
 }
 
 static inline int nci_set_vendor_cmds(struct nci_dev *ndev,
-				      struct nfc_vendor_cmd *cmds,
+				      const struct nfc_vendor_cmd *cmds,
 				      int n_cmds)
 {
 	return nfc_set_vendor_cmds(ndev->nfc_dev, cmds, n_cmds);
@@ -360,7 +362,7 @@ int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
 			struct sk_buff *skb);
 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
-int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
+int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload);
 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
 int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id);
 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
@@ -378,7 +380,7 @@ void nci_req_complete(struct nci_dev *ndev, int result);
 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
 						   int conn_id);
 int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
-					  struct dest_spec_params *params);
+					  const struct dest_spec_params *params);
 
 /* ----- NCI status code ----- */
 int nci_to_errno(__u8 code);
diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h
index 2cd3a261bcbc..5dee575fbe86 100644
--- a/include/net/nfc/nfc.h
+++ b/include/net/nfc/nfc.h
@@ -188,17 +188,17 @@ struct nfc_dev {
 
 	struct rfkill *rfkill;
 
-	struct nfc_vendor_cmd *vendor_cmds;
+	const struct nfc_vendor_cmd *vendor_cmds;
 	int n_vendor_cmds;
 
-	struct nfc_ops *ops;
+	const struct nfc_ops *ops;
 	struct genl_info *cur_cmd_info;
 };
 #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
 
 extern struct class nfc_class;
 
-struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
+struct nfc_dev *nfc_allocate_device(const struct nfc_ops *ops,
 				    u32 supported_protocols,
 				    int tx_headroom,
 				    int tx_tailroom);
@@ -245,7 +245,7 @@ static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
  *
  * @dev: The nfc device
  */
-static inline void *nfc_get_drvdata(struct nfc_dev *dev)
+static inline void *nfc_get_drvdata(const struct nfc_dev *dev)
 {
 	return dev_get_drvdata(&dev->dev);
 }
@@ -255,7 +255,7 @@ static inline void *nfc_get_drvdata(struct nfc_dev *dev)
  *
  * @dev: The nfc device whose name to return
  */
-static inline const char *nfc_device_name(struct nfc_dev *dev)
+static inline const char *nfc_device_name(const struct nfc_dev *dev)
 {
 	return dev_name(&dev->dev);
 }
@@ -266,7 +266,7 @@ struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
 struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
 
 int nfc_set_remote_general_bytes(struct nfc_dev *dev,
-				 u8 *gt, u8 gt_len);
+				 const u8 *gt, u8 gt_len);
 u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len);
 
 int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
@@ -280,7 +280,7 @@ int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
 		       u8 comm_mode, u8 rf_mode);
 
 int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
-		     u8 *gb, size_t gb_len);
+		     const u8 *gb, size_t gb_len);
 int nfc_tm_deactivated(struct nfc_dev *dev);
 int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb);
 
@@ -297,7 +297,7 @@ void nfc_send_to_raw_sock(struct nfc_dev *dev, struct sk_buff *skb,
 			  u8 payload_type, u8 direction);
 
 static inline int nfc_set_vendor_cmds(struct nfc_dev *dev,
-				      struct nfc_vendor_cmd *cmds,
+				      const struct nfc_vendor_cmd *cmds,
 				      int n_cmds)
 {
 	if (dev->vendor_cmds || dev->n_vendor_cmds)
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index ec7823921bd2..dc28fcb6f0a2 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -76,12 +76,10 @@ static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
 	return block->q;
 }
 
-int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-		 struct tcf_result *res, bool compat_mode);
-int tcf_classify_ingress(struct sk_buff *skb,
-			 const struct tcf_block *ingress_block,
-			 const struct tcf_proto *tp, struct tcf_result *res,
-			 bool compat_mode);
+int tcf_classify(struct sk_buff *skb,
+		 const struct tcf_block *block,
+		 const struct tcf_proto *tp, struct tcf_result *res,
+		 bool compat_mode);
 
 #else
 static inline bool tcf_block_shared(struct tcf_block *block)
@@ -138,20 +136,14 @@ void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
 {
 }
 
-static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+static inline int tcf_classify(struct sk_buff *skb,
+			       const struct tcf_block *block,
+			       const struct tcf_proto *tp,
 			       struct tcf_result *res, bool compat_mode)
 {
 	return TC_ACT_UNSPEC;
 }
 
-static inline int tcf_classify_ingress(struct sk_buff *skb,
-				       const struct tcf_block *ingress_block,
-				       const struct tcf_proto *tp,
-				       struct tcf_result *res, bool compat_mode)
-{
-	return TC_ACT_UNSPEC;
-}
-
 #endif
 
 static inline unsigned long
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 32fc4a309df5..651bba654d77 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -984,6 +984,7 @@ struct sctp_transport {
 	} cacc;
 
 	struct {
+		__u32 last_rtx_chunks;
 		__u16 pmtu;
 		__u16 probe_size;
 		__u16 probe_high;
@@ -1024,8 +1025,8 @@ bool sctp_transport_update_pmtu(struct sctp_transport *t, u32 pmtu);
 void sctp_transport_immediate_rtx(struct sctp_transport *);
 void sctp_transport_dst_release(struct sctp_transport *t);
 void sctp_transport_dst_confirm(struct sctp_transport *t);
-void sctp_transport_pl_send(struct sctp_transport *t);
-void sctp_transport_pl_recv(struct sctp_transport *t);
+bool sctp_transport_pl_send(struct sctp_transport *t);
+bool sctp_transport_pl_recv(struct sctp_transport *t);
 
 
 /* This is the structure we use to queue packets as they come into
diff --git a/include/net/sock.h b/include/net/sock.h
index f23cb259b0e2..ff1be7e7e90b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2249,6 +2249,15 @@ static inline __must_check bool skb_set_owner_sk_safe(struct sk_buff *skb, struc
 	return false;
 }
 
+static inline void skb_prepare_for_gro(struct sk_buff *skb)
+{
+	if (skb->destructor != sock_wfree) {
+		skb_orphan(skb);
+		return;
+	}
+	skb->slow_gro = 1;
+}
+
 void sk_reset_timer(struct sock *sk, struct timer_list *timer,
 		    unsigned long expires);
 
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index e4cac9218ce1..66468ff8cc0a 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -238,6 +238,12 @@ switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
 	return info->extack;
 }
 
+static inline bool
+switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info *fdb_info)
+{
+	return !fdb_info->added_by_user && !fdb_info->is_local;
+}
+
 #ifdef CONFIG_NET_SWITCHDEV
 
 void switchdev_deferred_process(void);
@@ -266,6 +272,30 @@ void switchdev_port_fwd_mark_set(struct net_device *dev,
 				 struct net_device *group_dev,
 				 bool joining);
 
+int switchdev_handle_fdb_add_to_device(struct net_device *dev,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*add_cb)(struct net_device *dev,
+			      const struct net_device *orig_dev, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_add_cb)(struct net_device *dev,
+				  const struct net_device *orig_dev, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info));
+
+int switchdev_handle_fdb_del_to_device(struct net_device *dev,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*del_cb)(struct net_device *dev,
+			      const struct net_device *orig_dev, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_del_cb)(struct net_device *dev,
+				  const struct net_device *orig_dev, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info));
+
 int switchdev_handle_port_obj_add(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
@@ -350,6 +380,38 @@ call_switchdev_blocking_notifiers(unsigned long val,
 }
 
 static inline int
+switchdev_handle_fdb_add_to_device(struct net_device *dev,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*add_cb)(struct net_device *dev,
+			      const struct net_device *orig_dev, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_add_cb)(struct net_device *dev,
+				  const struct net_device *orig_dev, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info))
+{
+	return 0;
+}
+
+static inline int
+switchdev_handle_fdb_del_to_device(struct net_device *dev,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*del_cb)(struct net_device *dev,
+			      const struct net_device *orig_dev, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_del_cb)(struct net_device *dev,
+				  const struct net_device *orig_dev, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info))
+{
+	return 0;
+}
+
+static inline int
 switchdev_handle_port_obj_add(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ba3034123e1d..3166dc15d7d6 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1709,7 +1709,6 @@ struct tcp_fastopen_context {
 	struct rcu_head	rcu;
 };
 
-extern unsigned int sysctl_tcp_fastopen_blackhole_timeout;
 void tcp_fastopen_active_disable(struct sock *sk);
 bool tcp_fastopen_active_should_disable(struct sock *sk);
 void tcp_fastopen_active_disable_ofo_check(struct sock *sk);