diff options
Diffstat (limited to 'include/linux/rtnetlink.h')
-rw-r--r-- | include/linux/rtnetlink.h | 144 |
1 files changed, 126 insertions, 18 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index bb9cb84114c1..ea39dd23a197 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -10,23 +10,32 @@ #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); -void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); +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); + int new_ifindex, u32 portid, + const struct nlmsghdr *nlh); void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, - gfp_t flags); + gfp_t flags, u32 portid, const struct nlmsghdr *nlh); /* RTNL is used as a global lock for all changes to network configuration */ @@ -34,13 +43,19 @@ 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 bool lockdep_rtnl_is_held(void); #else @@ -61,25 +76,88 @@ static inline bool lockdep_rtnl_is_held(void) rcu_dereference_check(p, lockdep_rtnl_is_held()) /** - * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking - * @p: The pointer to read, prior to dereference - * - * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() - * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() - */ -#define rcu_dereference_bh_rtnl(p) \ - rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) - -/** * 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 + * 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); @@ -100,15 +178,18 @@ void net_dec_ingress_queue(void); #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); -#define ASSERT_RTNL() \ - WARN_ONCE(!rtnl_is_locked(), \ - "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__) +/* 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, @@ -134,4 +215,31 @@ extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 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 */ |