6 files changed, 67 insertions, 13 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 6906af7a8f24..6560b32f3125 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1245,6 +1245,27 @@ static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 	return NULL;
 }
 
+static inline struct hci_conn *hci_conn_hash_lookup_role(struct hci_dev *hdev,
+							 __u8 type, __u8 role,
+							 bdaddr_t *ba)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn  *c;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(c, &h->list, list) {
+		if (c->type == type && c->role == role && !bacmp(&c->dst, ba)) {
+			rcu_read_unlock();
+			return c;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return NULL;
+}
+
 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 						       bdaddr_t *ba,
 						       __u8 ba_type)
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 4160731dcb6e..1fc2fb03ce3f 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -3,6 +3,7 @@
 #define __NET_DST_METADATA_H 1
 
 #include <linux/skbuff.h>
+#include <net/ip.h>
 #include <net/ip_tunnels.h>
 #include <net/macsec.h>
 #include <net/dst.h>
@@ -220,9 +221,15 @@ static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
 						 int md_size)
 {
 	const struct iphdr *iph = ip_hdr(skb);
+	struct metadata_dst *tun_dst;
+
+	tun_dst = __ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl,
+				   0, flags, tunnel_id, md_size);
 
-	return __ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl,
-				0, flags, tunnel_id, md_size);
+	if (tun_dst && (iph->frag_off & htons(IP_DF)))
+		__set_bit(IP_TUNNEL_DONT_FRAGMENT_BIT,
+			  tun_dst->u.tun_info.key.tun_flags);
+	return tun_dst;
 }
 
 static inline struct metadata_dst *__ipv6_tun_set_dst(const struct in6_addr *saddr,
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 025a7574b275..cb664f6e3558 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -204,7 +204,7 @@ struct net {
 extern struct net init_net;
 
 #ifdef CONFIG_NET_NS
-struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
+struct net *copy_net_ns(u64 flags, struct user_namespace *user_ns,
 			struct net *old_net);
 
 void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid);
@@ -218,7 +218,7 @@ extern struct task_struct *cleanup_net_task;
 #else /* CONFIG_NET_NS */
 #include <linux/sched.h>
 #include <linux/nsproxy.h>
-static inline struct net *copy_net_ns(unsigned long flags,
+static inline struct net *copy_net_ns(u64 flags,
 	struct user_namespace *user_ns, struct net *old_net)
 {
 	if (flags & CLONE_NEWNET)
@@ -262,10 +262,15 @@ void ipx_unregister_sysctl(void);
 #ifdef CONFIG_NET_NS
 void __put_net(struct net *net);
 
+static inline struct net *to_net_ns(struct ns_common *ns)
+{
+	return container_of(ns, struct net, ns);
+}
+
 /* Try using get_net_track() instead */
 static inline struct net *get_net(struct net *net)
 {
-	refcount_inc(&net->ns.count);
+	ns_ref_inc(net);
 	return net;
 }
 
@@ -276,7 +281,7 @@ static inline struct net *maybe_get_net(struct net *net)
 	 * exists.  If the reference count is zero this
 	 * function fails and returns NULL.
 	 */
-	if (!refcount_inc_not_zero(&net->ns.count))
+	if (!ns_ref_get(net))
 		net = NULL;
 	return net;
 }
@@ -284,7 +289,7 @@ static inline struct net *maybe_get_net(struct net *net)
 /* Try using put_net_track() instead */
 static inline void put_net(struct net *net)
 {
-	if (refcount_dec_and_test(&net->ns.count))
+	if (ns_ref_put(net))
 		__put_net(net);
 }
 
@@ -296,7 +301,7 @@ int net_eq(const struct net *net1, const struct net *net2)
 
 static inline int check_net(const struct net *net)
 {
-	return refcount_read(&net->ns.count) != 0;
+	return ns_ref_read(net) != 0;
 }
 
 void net_drop_ns(void *);
diff --git a/include/net/sock.h b/include/net/sock.h
index fb13322a11fc..2e14283c5be1 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2061,6 +2061,9 @@ static inline void sk_set_socket(struct sock *sk, struct socket *sock)
 	if (sock) {
 		WRITE_ONCE(sk->sk_uid, SOCK_INODE(sock)->i_uid);
 		WRITE_ONCE(sk->sk_ino, SOCK_INODE(sock)->i_ino);
+	} else {
+		/* Note: sk_uid is unchanged. */
+		WRITE_ONCE(sk->sk_ino, 0);
 	}
 }
 
@@ -2082,8 +2085,6 @@ static inline void sock_orphan(struct sock *sk)
 	sock_set_flag(sk, SOCK_DEAD);
 	sk_set_socket(sk, NULL);
 	sk->sk_wq  = NULL;
-	/* Note: sk_uid is unchanged. */
-	WRITE_ONCE(sk->sk_ino, 0);
 	write_unlock_bh(&sk->sk_callback_lock);
 }
 
diff --git a/include/net/xdp.h b/include/net/xdp.h
index b40f1f96cb11..f288c348a6c1 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -115,6 +115,11 @@ static __always_inline void xdp_buff_set_frag_pfmemalloc(struct xdp_buff *xdp)
 	xdp->flags |= XDP_FLAGS_FRAGS_PF_MEMALLOC;
 }
 
+static __always_inline void xdp_buff_clear_frag_pfmemalloc(struct xdp_buff *xdp)
+{
+	xdp->flags &= ~XDP_FLAGS_FRAGS_PF_MEMALLOC;
+}
+
 static __always_inline void
 xdp_init_buff(struct xdp_buff *xdp, u32 frame_sz, struct xdp_rxq_info *rxq)
 {
diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h
index 513c8e9704f6..4f2d3268a676 100644
--- a/include/net/xdp_sock_drv.h
+++ b/include/net/xdp_sock_drv.h
@@ -160,13 +160,23 @@ static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first)
 	return ret;
 }
 
-static inline void xsk_buff_del_tail(struct xdp_buff *tail)
+static inline void xsk_buff_del_frag(struct xdp_buff *xdp)
 {
-	struct xdp_buff_xsk *xskb = container_of(tail, struct xdp_buff_xsk, xdp);
+	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
 	list_del(&xskb->list_node);
 }
 
+static inline struct xdp_buff *xsk_buff_get_head(struct xdp_buff *first)
+{
+	struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp);
+	struct xdp_buff_xsk *frag;
+
+	frag = list_first_entry(&xskb->pool->xskb_list, struct xdp_buff_xsk,
+				list_node);
+	return &frag->xdp;
+}
+
 static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first)
 {
 	struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp);
@@ -389,8 +399,13 @@ static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first)
 	return NULL;
 }
 
-static inline void xsk_buff_del_tail(struct xdp_buff *tail)
+static inline void xsk_buff_del_frag(struct xdp_buff *xdp)
+{
+}
+
+static inline struct xdp_buff *xsk_buff_get_head(struct xdp_buff *first)
 {
+	return NULL;
 }
 
 static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first)