diff options
Diffstat (limited to 'include/linux/rtnetlink.h')
| -rw-r--r-- | include/linux/rtnetlink.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index 3d6cf306cd55..a7da7dfc06a2 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -7,9 +7,17 @@ #include <linux/netdevice.h> #include <linux/wait.h> #include <linux/refcount.h> +#include <linux/cleanup.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, const struct nlmsghdr *nlh, gfp_t flags); @@ -39,7 +47,10 @@ extern int rtnl_is_locked(void); extern int rtnl_lock_killable(void); extern bool refcount_dec_and_rtnl_lock(refcount_t *r); +DEFINE_LOCK_GUARD_0(rtnl, rtnl_lock(), rtnl_unlock()) + 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; @@ -72,6 +83,18 @@ static inline bool lockdep_rtnl_is_held(void) #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()) + static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) { return rtnl_dereference(dev->ingress_queue); @@ -130,4 +153,28 @@ extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 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 netdev_set_operstate(struct net_device *dev, int newstate); + #endif /* __LINUX_RTNETLINK_H */ |