Merge branch 'main' of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git

# Conflicts:
#	MAINTAINERS

8 files changed, 37 insertions, 9 deletions

diff --git a/include/linux/net.h b/include/linux/net.h
index fdcf9956805c..3d82966e2243 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -47,6 +47,29 @@ typedef struct sockopt {
 	int optlen;
 } sockopt_t;
 
+/*
+ * Initialize a user-backed sockopt_t from the (optval, optlen) __user pair of
+ * a getsockopt() callback. Used by transitional __user getsockopt wrappers
+ * while the proto-layer callbacks are converted to take a sockopt_t; the
+ * caller writes opt->optlen back to the user optlen after the callback.
+ */
+static inline int sockopt_init_user(sockopt_t *opt, char __user *optval,
+				    int __user *optlen)
+{
+	int len;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+	if (len < 0)
+		return -EINVAL;
+
+	iov_iter_ubuf(&opt->iter_out, ITER_DEST, optval, len);
+	iov_iter_ubuf(&opt->iter_in, ITER_SOURCE, optval, len);
+	opt->optlen = len;
+
+	return 0;
+}
+
 struct poll_table_struct;
 struct pipe_inode_info;
 struct inode;
diff --git a/include/net/bond_3ad.h b/include/net/bond_3ad.h
index 05572c19e14b..ef667dff2972 100644
--- a/include/net/bond_3ad.h
+++ b/include/net/bond_3ad.h
@@ -302,8 +302,8 @@ void bond_3ad_state_machine_handler(struct work_struct *);
 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
 void bond_3ad_handle_link_change(struct slave *slave, char link);
-int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
-int  __bond_3ad_get_active_agg_info(struct bonding *bond,
+int  bond_3ad_get_active_agg_info(const struct bonding *bond, struct ad_info *ad_info);
+int  __bond_3ad_get_active_agg_info(const struct bonding *bond,
 				    struct ad_info *ad_info);
 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
 			 struct slave *slave);
diff --git a/include/net/bonding.h b/include/net/bonding.h
index 2c54a36a8477..598d56b1bc97 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -345,14 +345,14 @@ static inline bool bond_mode_uses_primary(int mode)
 	       mode == BOND_MODE_ALB;
 }
 
-static inline bool bond_uses_primary(struct bonding *bond)
+static inline bool bond_uses_primary(const struct bonding *bond)
 {
 	return bond_mode_uses_primary(BOND_MODE(bond));
 }
 
-static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
+static inline struct net_device *bond_option_active_slave_get_rcu(const struct bonding *bond)
 {
-	struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
+	const struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
 
 	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 }
@@ -703,7 +703,7 @@ void bond_setup(struct net_device *bond_dev);
 unsigned int bond_get_num_tx_queues(void);
 int bond_netlink_init(void);
 void bond_netlink_fini(void);
-struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
+struct net_device *bond_option_active_slave_get_rcu(const struct bonding *bond);
 const char *bond_slave_link_status(s8 link);
 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 					      struct net_device *end_dev,
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 7dee0ae616e3..c6b94790fa81 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -82,7 +82,7 @@ struct fib_rules_ops {
 					     struct fib_rule_hdr *,
 					     struct nlattr **,
 					     struct netlink_ext_ack *);
-	int			(*delete)(struct fib_rule *);
+	void			(*delete)(struct fib_rule *);
 	int			(*compare)(struct fib_rule *,
 					   struct fib_rule_hdr *,
 					   struct nlattr **);
@@ -93,11 +93,13 @@ struct fib_rules_ops {
 	/* Called after modifications to the rules set, must flush
 	 * the route cache if one exists. */
 	void			(*flush_cache)(struct fib_rules_ops *ops);
+	bool			(*need_rtnl)(struct net *net);
 
 	int			nlgroup;
 	struct list_head	rules_list;
 	struct module		*owner;
 	struct net		*fro_net;
+	struct mutex		lock;
 	struct rcu_head		rcu;
 };
 
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index c63a3c4967ae..0a35355fb0f3 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -302,7 +302,8 @@ static inline struct fib_table *fib_get_table(struct net *net, u32 id)
 		&net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
 		&net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];
 
-	tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr));
+	/* Only fib4_rules_init() adds fib_table. */
+	tb_hlist = rcu_dereference_protected(hlist_first_rcu(ptr), true);
 
 	return hlist_entry(tb_hlist, struct fib_table, tb_hlist);
 }
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 6e27c56514df..59506320558a 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -127,6 +127,7 @@ struct netns_ipv4 {
 	atomic_t		fib_num_tclassid_users;
 #endif
 	struct hlist_head	*fib_table_hash;
+	spinlock_t		fib_table_hash_lock;
 	struct sock		*fibnl;
 	struct hlist_head	*fib_info_hash;
 	unsigned int		fib_info_hash_bits;
diff --git a/include/net/udp.h b/include/net/udp.h
index 8262e2b215b4..1fee17274745 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -430,7 +430,7 @@ struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
 				       netdev_features_t features,
 				       bool is_ipv6);
 int udp_lib_getsockopt(struct sock *sk, int level, int optname,
-		       char __user *optval, int __user *optlen);
+		       sockopt_t *opt);
 int udp_lib_setsockopt(struct sock *sk, int level, int optname,
 		       sockptr_t optval, unsigned int optlen,
 		       int (*push_pending_frames)(struct sock *));
diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h
index aa7958b4e41d..7fb630b7fe31 100644
--- a/include/uapi/linux/if_addr.h
+++ b/include/uapi/linux/if_addr.h
@@ -36,6 +36,7 @@ enum {
 	IFA_RT_PRIORITY,	/* u32, priority/metric for prefix route */
 	IFA_TARGET_NETNSID,
 	IFA_PROTO,		/* u8, address protocol */
+	IFA_MC_USERS,		/* u32, multicast group users */
 	__IFA_MAX,
 };