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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 <linux/refcount.h>
 10 #include <uapi/linux/rtnetlink.h>
 11 
 12 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 13 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 14 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 15                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 16 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 17 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 18 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 19                               u32 id, long expires, u32 error);
 20 
 21 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
 22 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
 23                          gfp_t flags, int *new_nsid, int new_ifindex);
 24 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
 25                                        unsigned change, u32 event,
 26                                        gfp_t flags, int *new_nsid,
 27                                        int new_ifindex);
 28 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
 29                        gfp_t flags);
 30 
 31 
 32 /* RTNL is used as a global lock for all changes to network configuration  */
 33 extern void rtnl_lock(void);
 34 extern void rtnl_unlock(void);
 35 extern int rtnl_trylock(void);
 36 extern int rtnl_is_locked(void);
 37 extern int rtnl_lock_killable(void);
 38 extern bool refcount_dec_and_rtnl_lock(refcount_t *r);
 39 
 40 extern wait_queue_head_t netdev_unregistering_wq;
 41 extern struct rw_semaphore pernet_ops_rwsem;
 42 extern struct rw_semaphore net_rwsem;
 43 
 44 #ifdef CONFIG_PROVE_LOCKING
 45 extern bool lockdep_rtnl_is_held(void);
 46 #else
 47 static inline bool lockdep_rtnl_is_held(void)
 48 {
 49         return true;
 50 }
 51 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 52 
 53 /**
 54  * rcu_dereference_rtnl - rcu_dereference with debug checking
 55  * @p: The pointer to read, prior to dereferencing
 56  *
 57  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 58  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
 59  */
 60 #define rcu_dereference_rtnl(p)                                 \
 61         rcu_dereference_check(p, lockdep_rtnl_is_held())
 62 
 63 /**
 64  * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
 65  * @p: The pointer to read, prior to dereference
 66  *
 67  * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
 68  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
 69  */
 70 #define rcu_dereference_bh_rtnl(p)                              \
 71         rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
 72 
 73 /**
 74  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 75  * @p: The pointer to read, prior to dereferencing
 76  *
 77  * Return the value of the specified RCU-protected pointer, but omit
 78  * the READ_ONCE(), because caller holds RTNL.
 79  */
 80 #define rtnl_dereference(p)                                     \
 81         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 82 
 83 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 84 {
 85         return rtnl_dereference(dev->ingress_queue);
 86 }
 87 
 88 static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev)
 89 {
 90         return rcu_dereference(dev->ingress_queue);
 91 }
 92 
 93 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 94 
 95 #ifdef CONFIG_NET_INGRESS
 96 void net_inc_ingress_queue(void);
 97 void net_dec_ingress_queue(void);
 98 #endif
 99 
100 #ifdef CONFIG_NET_EGRESS
101 void net_inc_egress_queue(void);
102 void net_dec_egress_queue(void);
103 #endif
104 
105 void rtnetlink_init(void);
106 void __rtnl_unlock(void);
107 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
108 
109 #define ASSERT_RTNL() \
110         WARN_ONCE(!rtnl_is_locked(), \
111                   "RTNL: assertion failed at %s (%d)\n", __FILE__,  __LINE__)
112 
113 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
114                              struct netlink_callback *cb,
115                              struct net_device *dev,
116                              struct net_device *filter_dev,
117                              int *idx);
118 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
119                             struct nlattr *tb[],
120                             struct net_device *dev,
121                             const unsigned char *addr,
122                             u16 vid,
123                             u16 flags);
124 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
125                             struct nlattr *tb[],
126                             struct net_device *dev,
127                             const unsigned char *addr,
128                             u16 vid);
129 
130 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
131                                    struct net_device *dev, u16 mode,
132                                    u32 flags, u32 mask, int nlflags,
133                                    u32 filter_mask,
134                                    int (*vlan_fill)(struct sk_buff *skb,
135                                                     struct net_device *dev,
136                                                     u32 filter_mask));
137 #endif  /* __LINUX_RTNETLINK_H */
138 

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