1 files changed, 181 insertions, 20 deletions

diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index f28544b2f9af..ea39dd23a197 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -1,29 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __LINUX_RTNETLINK_H
 #define __LINUX_RTNETLINK_H
 
 
 #include <linux/mutex.h>
 #include <linux/netdevice.h>
+#include <linux/wait.h>
+#include <linux/refcount.h>
 #include <uapi/linux/rtnetlink.h>
 
 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
+
+static inline int rtnetlink_maybe_send(struct sk_buff *skb, struct net *net,
+				       u32 pid, u32 group, int echo)
+{
+	return !skb ? 0 : rtnetlink_send(skb, net, pid, group, echo);
+}
+
 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
-			u32 group, struct nlmsghdr *nlh, gfp_t flags);
+			u32 group, const struct nlmsghdr *nlh, gfp_t flags);
 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 			      u32 id, long expires, u32 error);
 
-extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
+void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, gfp_t flags,
+		  u32 portid, const struct nlmsghdr *nlh);
+void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
+			 gfp_t flags, int *new_nsid, int new_ifindex);
+struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
+				       unsigned change, u32 event,
+				       gfp_t flags, int *new_nsid,
+				       int new_ifindex, u32 portid,
+				       const struct nlmsghdr *nlh);
+void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
+		       gfp_t flags, u32 portid, const struct nlmsghdr *nlh);
+
 
 /* RTNL is used as a global lock for all changes to network configuration  */
 extern void rtnl_lock(void);
 extern void rtnl_unlock(void);
 extern int rtnl_trylock(void);
 extern int rtnl_is_locked(void);
+extern int rtnl_lock_interruptible(void);
+extern int rtnl_lock_killable(void);
+extern bool refcount_dec_and_rtnl_lock(refcount_t *r);
+
+extern wait_queue_head_t netdev_unregistering_wq;
+extern atomic_t dev_unreg_count;
+extern struct rw_semaphore pernet_ops_rwsem;
+extern struct rw_semaphore net_rwsem;
+
+#define ASSERT_RTNL() \
+	WARN_ONCE(!rtnl_is_locked(), \
+		  "RTNL: assertion failed at %s (%d)\n", __FILE__,  __LINE__)
+
 #ifdef CONFIG_PROVE_LOCKING
-extern int lockdep_rtnl_is_held(void);
+extern bool lockdep_rtnl_is_held(void);
+#else
+static inline bool lockdep_rtnl_is_held(void)
+{
+	return true;
+}
 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 
 /**
@@ -40,45 +79,167 @@ extern int lockdep_rtnl_is_held(void);
  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
  * @p: The pointer to read, prior to dereferencing
  *
- * Return the value of the specified RCU-protected pointer, but omit
- * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
- * caller holds RTNL.
+ * Return: the value of the specified RCU-protected pointer, but omit
+ * the READ_ONCE(), because caller holds RTNL.
  */
 #define rtnl_dereference(p)					\
 	rcu_dereference_protected(p, lockdep_rtnl_is_held())
 
+/**
+ * rcu_replace_pointer_rtnl - replace an RCU pointer under rtnl_lock, returning
+ * its old value
+ * @rp: RCU pointer, whose value is returned
+ * @p: regular pointer
+ *
+ * Perform a replacement under rtnl_lock, where @rp is an RCU-annotated
+ * pointer. The old value of @rp is returned, and @rp is set to @p
+ */
+#define rcu_replace_pointer_rtnl(rp, p)			\
+	rcu_replace_pointer(rp, p, lockdep_rtnl_is_held())
+
+#ifdef CONFIG_DEBUG_NET_SMALL_RTNL
+void __rtnl_net_lock(struct net *net);
+void __rtnl_net_unlock(struct net *net);
+void rtnl_net_lock(struct net *net);
+void rtnl_net_unlock(struct net *net);
+int rtnl_net_trylock(struct net *net);
+int rtnl_net_lock_killable(struct net *net);
+int rtnl_net_lock_cmp_fn(const struct lockdep_map *a, const struct lockdep_map *b);
+
+bool rtnl_net_is_locked(struct net *net);
+
+#define ASSERT_RTNL_NET(net)						\
+	WARN_ONCE(!rtnl_net_is_locked(net),				\
+		  "RTNL_NET: assertion failed at %s (%d)\n",		\
+		  __FILE__,  __LINE__)
+
+bool lockdep_rtnl_net_is_held(struct net *net);
+
+#define rcu_dereference_rtnl_net(net, p)				\
+	rcu_dereference_check(p, lockdep_rtnl_net_is_held(net))
+#define rtnl_net_dereference(net, p)					\
+	rcu_dereference_protected(p, lockdep_rtnl_net_is_held(net))
+#define rcu_replace_pointer_rtnl_net(net, rp, p)			\
+	rcu_replace_pointer(rp, p, lockdep_rtnl_net_is_held(net))
+#else
+static inline void __rtnl_net_lock(struct net *net) {}
+static inline void __rtnl_net_unlock(struct net *net) {}
+
+static inline void rtnl_net_lock(struct net *net)
+{
+	rtnl_lock();
+}
+
+static inline void rtnl_net_unlock(struct net *net)
+{
+	rtnl_unlock();
+}
+
+static inline int rtnl_net_trylock(struct net *net)
+{
+	return rtnl_trylock();
+}
+
+static inline int rtnl_net_lock_killable(struct net *net)
+{
+	return rtnl_lock_killable();
+}
+
+static inline void ASSERT_RTNL_NET(struct net *net)
+{
+	ASSERT_RTNL();
+}
+
+#define rcu_dereference_rtnl_net(net, p)		\
+	rcu_dereference_rtnl(p)
+#define rtnl_net_dereference(net, p)			\
+	rtnl_dereference(p)
+#define rcu_replace_pointer_rtnl_net(net, rp, p)	\
+	rcu_replace_pointer_rtnl(rp, p)
+#endif
+
 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 {
 	return rtnl_dereference(dev->ingress_queue);
 }
 
-extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
+static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev)
+{
+	return rcu_dereference(dev->ingress_queue);
+}
+
+struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 
-extern void rtnetlink_init(void);
-extern void __rtnl_unlock(void);
+#ifdef CONFIG_NET_INGRESS
+void net_inc_ingress_queue(void);
+void net_dec_ingress_queue(void);
+#endif
 
-#define ASSERT_RTNL() do { \
-	if (unlikely(!rtnl_is_locked())) { \
-		printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
-		       __FILE__,  __LINE__); \
-		dump_stack(); \
-	} \
-} while(0)
+#ifdef CONFIG_NET_EGRESS
+void net_inc_egress_queue(void);
+void net_dec_egress_queue(void);
+void netdev_xmit_skip_txqueue(bool skip);
+#endif
+
+void rtnetlink_init(void);
+void __rtnl_unlock(void);
+void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
+
+/* Shared by rtnl_fdb_dump() and various ndo_fdb_dump() helpers. */
+struct ndo_fdb_dump_context {
+	unsigned long ifindex;
+	unsigned long fdb_idx;
+};
 
 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
 			     struct netlink_callback *cb,
 			     struct net_device *dev,
-			     int idx);
+			     struct net_device *filter_dev,
+			     int *idx);
 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
 			    struct nlattr *tb[],
 			    struct net_device *dev,
 			    const unsigned char *addr,
-			     u16 flags);
+			    u16 vid,
+			    u16 flags);
 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
 			    struct nlattr *tb[],
 			    struct net_device *dev,
-			    const unsigned char *addr);
+			    const unsigned char *addr,
+			    u16 vid);
 
 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
-				   struct net_device *dev, u16 mode);
+				   struct net_device *dev, u16 mode,
+				   u32 flags, u32 mask, int nlflags,
+				   u32 filter_mask,
+				   int (*vlan_fill)(struct sk_buff *skb,
+						    struct net_device *dev,
+						    u32 filter_mask));
+
+extern void rtnl_offload_xstats_notify(struct net_device *dev);
+
+static inline int rtnl_has_listeners(const struct net *net, u32 group)
+{
+	struct sock *rtnl = net->rtnl;
+
+	return netlink_has_listeners(rtnl, group);
+}
+
+/**
+ * rtnl_notify_needed - check if notification is needed
+ * @net: Pointer to the net namespace
+ * @nlflags: netlink ingress message flags
+ * @group: rtnl group
+ *
+ * Based on the ingress message flags and rtnl group, returns true
+ * if a notification is needed, false otherwise.
+ */
+static inline bool
+rtnl_notify_needed(const struct net *net, u16 nlflags, u32 group)
+{
+	return (nlflags & NLM_F_ECHO) || rtnl_has_listeners(net, group);
+}
+
+void netif_set_operstate(struct net_device *dev, int newstate);
+
 #endif	/* __LINUX_RTNETLINK_H */