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TOMOYO Linux Cross Reference
Linux/include/linux/rtnetlink.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __LINUX_RTNETLINK_H
  3 #define __LINUX_RTNETLINK_H
  4 
  5 
  6 #include <linux/mutex.h>
  7 #include <linux/netdevice.h>
  8 #include <linux/wait.h>
  9 #include <uapi/linux/rtnetlink.h>
 10 
 11 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 12 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 13 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 14                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 15 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 16 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 17 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 18                               u32 id, long expires, u32 error);
 19 
 20 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
 21 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
 22                          gfp_t flags, int *new_nsid, int new_ifindex);
 23 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
 24                                        unsigned change, u32 event,
 25                                        gfp_t flags, int *new_nsid,
 26                                        int new_ifindex);
 27 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
 28                        gfp_t flags);
 29 
 30 
 31 /* RTNL is used as a global lock for all changes to network configuration  */
 32 extern void rtnl_lock(void);
 33 extern void rtnl_unlock(void);
 34 extern int rtnl_trylock(void);
 35 extern int rtnl_is_locked(void);
 36 extern int rtnl_lock_killable(void);
 37 
 38 extern wait_queue_head_t netdev_unregistering_wq;
 39 extern struct rw_semaphore pernet_ops_rwsem;
 40 extern struct rw_semaphore net_rwsem;
 41 
 42 #ifdef CONFIG_PROVE_LOCKING
 43 extern bool lockdep_rtnl_is_held(void);
 44 #else
 45 static inline bool lockdep_rtnl_is_held(void)
 46 {
 47         return true;
 48 }
 49 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 50 
 51 /**
 52  * rcu_dereference_rtnl - rcu_dereference with debug checking
 53  * @p: The pointer to read, prior to dereferencing
 54  *
 55  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 56  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
 57  */
 58 #define rcu_dereference_rtnl(p)                                 \
 59         rcu_dereference_check(p, lockdep_rtnl_is_held())
 60 
 61 /**
 62  * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
 63  * @p: The pointer to read, prior to dereference
 64  *
 65  * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
 66  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
 67  */
 68 #define rcu_dereference_bh_rtnl(p)                              \
 69         rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
 70 
 71 /**
 72  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 73  * @p: The pointer to read, prior to dereferencing
 74  *
 75  * Return the value of the specified RCU-protected pointer, but omit
 76  * the READ_ONCE(), because caller holds RTNL.
 77  */
 78 #define rtnl_dereference(p)                                     \
 79         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 80 
 81 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 82 {
 83         return rtnl_dereference(dev->ingress_queue);
 84 }
 85 
 86 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 87 
 88 #ifdef CONFIG_NET_INGRESS
 89 void net_inc_ingress_queue(void);
 90 void net_dec_ingress_queue(void);
 91 #endif
 92 
 93 #ifdef CONFIG_NET_EGRESS
 94 void net_inc_egress_queue(void);
 95 void net_dec_egress_queue(void);
 96 #endif
 97 
 98 void rtnetlink_init(void);
 99 void __rtnl_unlock(void);
100 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
101 
102 #define ASSERT_RTNL() \
103         WARN_ONCE(!rtnl_is_locked(), \
104                   "RTNL: assertion failed at %s (%d)\n", __FILE__,  __LINE__)
105 
106 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
107                              struct netlink_callback *cb,
108                              struct net_device *dev,
109                              struct net_device *filter_dev,
110                              int *idx);
111 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
112                             struct nlattr *tb[],
113                             struct net_device *dev,
114                             const unsigned char *addr,
115                             u16 vid,
116                             u16 flags);
117 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
118                             struct nlattr *tb[],
119                             struct net_device *dev,
120                             const unsigned char *addr,
121                             u16 vid);
122 
123 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
124                                    struct net_device *dev, u16 mode,
125                                    u32 flags, u32 mask, int nlflags,
126                                    u32 filter_mask,
127                                    int (*vlan_fill)(struct sk_buff *skb,
128                                                     struct net_device *dev,
129                                                     u32 filter_mask));
130 #endif  /* __LINUX_RTNETLINK_H */
131 

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