genetlink.h
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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 */