diff options
Diffstat (limited to 'include/linux/rtnetlink.h')
| -rw-r--r-- | include/linux/rtnetlink.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h new file mode 100644 index 000000000..3d6cf306c --- /dev/null +++ b/include/linux/rtnetlink.h @@ -0,0 +1,133 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_RTNETLINK_H +#define __LINUX_RTNETLINK_H + + +#include <linux/mutex.h> +#include <linux/netdevice.h> +#include <linux/wait.h> +#include <linux/refcount.h> +#include <uapi/linux/rtnetlink.h> + +extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int 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); +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 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, u32 portid, + const struct nlmsghdr *nlh); +void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, + gfp_t flags, u32 portid, const struct nlmsghdr *nlh); + + +/* RTNL is used as a global lock for all changes to network configuration */ +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_killable(void); +extern bool refcount_dec_and_rtnl_lock(refcount_t *r); + +extern wait_queue_head_t netdev_unregistering_wq; +extern struct rw_semaphore pernet_ops_rwsem; +extern struct rw_semaphore net_rwsem; + +#ifdef CONFIG_PROVE_LOCKING +extern bool lockdep_rtnl_is_held(void); +#else +static inline bool lockdep_rtnl_is_held(void) +{ + return true; +} +#endif /* #ifdef CONFIG_PROVE_LOCKING */ + +/** + * rcu_dereference_rtnl - rcu_dereference with debug checking + * @p: The pointer to read, prior to dereferencing + * + * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() + * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() + */ +#define rcu_dereference_rtnl(p) \ + rcu_dereference_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 + * the READ_ONCE(), because caller holds RTNL. + */ +#define rtnl_dereference(p) \ + rcu_dereference_protected(p, lockdep_rtnl_is_held()) + +static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) +{ + return rtnl_dereference(dev->ingress_queue); +} + +static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev) +{ + return rcu_dereference(dev->ingress_queue); +} + +struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); + +#ifdef CONFIG_NET_INGRESS +void net_inc_ingress_queue(void); +void net_dec_ingress_queue(void); +#endif + +#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__) + +extern int ndo_dflt_fdb_dump(struct sk_buff *skb, + struct netlink_callback *cb, + struct net_device *dev, + struct net_device *filter_dev, + int *idx); +extern int ndo_dflt_fdb_add(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 vid, + u16 flags); +extern int ndo_dflt_fdb_del(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 vid); + +extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, + struct net_device *dev, u16 mode, + u32 flags, u32 mask, int nlflags, + u32 filter_mask, + int (*vlan_fill)(struct sk_buff *skb, + struct net_device *dev, + u32 filter_mask)); + +extern void rtnl_offload_xstats_notify(struct net_device *dev); + +#endif /* __LINUX_RTNETLINK_H */ |