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- #ifndef __LINUX_GENERIC_NETLINK_H
- #define __LINUX_GENERIC_NETLINK_H
- #include <uapi/linux/genetlink.h>
- /* All generic netlink requests are serialized by a global lock. */
- extern void genl_lock(void);
- extern void genl_unlock(void);
- #ifdef CONFIG_LOCKDEP
- extern bool lockdep_genl_is_held(void);
- #endif
- /* for synchronisation between af_netlink and genetlink */
- extern atomic_t genl_sk_destructing_cnt;
- extern wait_queue_head_t genl_sk_destructing_waitq;
- /**
- * rcu_dereference_genl - 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 genl mutex. Note : Please prefer genl_dereference() or rcu_dereference()
- */
- #define rcu_dereference_genl(p) \
- rcu_dereference_check(p, lockdep_genl_is_held())
- /**
- * genl_dereference - fetch RCU pointer when updates are prevented by genl mutex
- * @p: The pointer to read, prior to dereferencing
- *
- * Return the value of the specified RCU-protected pointer, but omit
- * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
- * caller holds genl mutex.
- */
- #define genl_dereference(p) \
- rcu_dereference_protected(p, lockdep_genl_is_held())
- #define MODULE_ALIAS_GENL_FAMILY(family)\
- MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)
- #endif /* __LINUX_GENERIC_NETLINK_H */
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