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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);
 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 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
 27                        gfp_t flags);
 28 
 29 
 30 /* RTNL is used as a global lock for all changes to network configuration  */
 31 extern void rtnl_lock(void);
 32 extern void rtnl_unlock(void);
 33 extern int rtnl_trylock(void);
 34 extern int rtnl_is_locked(void);
 35 
 36 extern wait_queue_head_t netdev_unregistering_wq;
 37 extern struct mutex net_mutex;
 38 
 39 #ifdef CONFIG_PROVE_LOCKING
 40 extern bool lockdep_rtnl_is_held(void);
 41 #else
 42 static inline bool lockdep_rtnl_is_held(void)
 43 {
 44         return true;
 45 }
 46 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 47 
 48 /**
 49  * rcu_dereference_rtnl - rcu_dereference with debug checking
 50  * @p: The pointer to read, prior to dereferencing
 51  *
 52  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 53  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
 54  */
 55 #define rcu_dereference_rtnl(p)                                 \
 56         rcu_dereference_check(p, lockdep_rtnl_is_held())
 57 
 58 /**
 59  * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
 60  * @p: The pointer to read, prior to dereference
 61  *
 62  * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
 63  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
 64  */
 65 #define rcu_dereference_bh_rtnl(p)                              \
 66         rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
 67 
 68 /**
 69  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 70  * @p: The pointer to read, prior to dereferencing
 71  *
 72  * Return the value of the specified RCU-protected pointer, but omit
 73  * both the smp_read_barrier_depends() and the READ_ONCE(), because
 74  * caller holds RTNL.
 75  */
 76 #define rtnl_dereference(p)                                     \
 77         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 78 
 79 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 80 {
 81         return rtnl_dereference(dev->ingress_queue);
 82 }
 83 
 84 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 85 
 86 #ifdef CONFIG_NET_INGRESS
 87 void net_inc_ingress_queue(void);
 88 void net_dec_ingress_queue(void);
 89 #endif
 90 
 91 #ifdef CONFIG_NET_EGRESS
 92 void net_inc_egress_queue(void);
 93 void net_dec_egress_queue(void);
 94 #endif
 95 
 96 void rtnetlink_init(void);
 97 void __rtnl_unlock(void);
 98 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
 99 
100 #define ASSERT_RTNL() do { \
101         if (unlikely(!rtnl_is_locked())) { \
102                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
103                        __FILE__,  __LINE__); \
104                 dump_stack(); \
105         } \
106 } while(0)
107 
108 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
109                              struct netlink_callback *cb,
110                              struct net_device *dev,
111                              struct net_device *filter_dev,
112                              int *idx);
113 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
114                             struct nlattr *tb[],
115                             struct net_device *dev,
116                             const unsigned char *addr,
117                             u16 vid,
118                             u16 flags);
119 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
120                             struct nlattr *tb[],
121                             struct net_device *dev,
122                             const unsigned char *addr,
123                             u16 vid);
124 
125 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
126                                    struct net_device *dev, u16 mode,
127                                    u32 flags, u32 mask, int nlflags,
128                                    u32 filter_mask,
129                                    int (*vlan_fill)(struct sk_buff *skb,
130                                                     struct net_device *dev,
131                                                     u32 filter_mask));
132 #endif  /* __LINUX_RTNETLINK_H */
133 

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