1 #ifndef __LINUX_GENERIC_NETLINK_H
2 #define __LINUX_GENERIC_NETLINK_H
4 #include <uapi/linux/genetlink.h>
7 /* All generic netlink requests are serialized by a global lock. */
8 extern void genl_lock(void);
9 extern void genl_unlock(void);
11 extern int lockdep_genl_is_held(void);
15 * rcu_dereference_genl - rcu_dereference with debug checking
16 * @p: The pointer to read, prior to dereferencing
18 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
19 * or genl mutex. Note : Please prefer genl_dereference() or rcu_dereference()
21 #define rcu_dereference_genl(p) \
22 rcu_dereference_check(p, lockdep_genl_is_held())
25 * genl_dereference - fetch RCU pointer when updates are prevented by genl mutex
26 * @p: The pointer to read, prior to dereferencing
28 * Return the value of the specified RCU-protected pointer, but omit
29 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
30 * caller holds genl mutex.
32 #define genl_dereference(p) \
33 rcu_dereference_protected(p, lockdep_genl_is_held())
35 #define MODULE_ALIAS_GENL_FAMILY(family)\
36 MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)
38 #endif /* __LINUX_GENERIC_NETLINK_H */