projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 482a8524 TG |
1 | #ifndef __LINUX_GENERIC_NETLINK_H |
| 2 | #define __LINUX_GENERIC_NETLINK_H | |
| 3 | ||
| 607ca46e | 4 | #include <uapi/linux/genetlink.h> |
| 482a8524 | 5 | |
| f408e0ce JC |
6 | |
| 7 | /* All generic netlink requests are serialized by a global lock. */ | |
| 8 | extern void genl_lock(void); | |
| 9 | extern void genl_unlock(void); | |
| 320f5ea0 | 10 | #ifdef CONFIG_LOCKDEP |
| 61d03535 | 11 | extern bool lockdep_genl_is_held(void); |
| 86b1309c | 12 | #endif |
| f408e0ce | 13 | |
| ee1c2442 JB |
14 | /* for synchronisation between af_netlink and genetlink */ |
| 15 | extern atomic_t genl_sk_destructing_cnt; | |
| 16 | extern wait_queue_head_t genl_sk_destructing_waitq; | |
| 17 | ||
| b4e16611 JG |
18 | /** |
| 19 | * rcu_dereference_genl - rcu_dereference with debug checking | |
| 20 | * @p: The pointer to read, prior to dereferencing | |
| 21 | * | |
| 22 | * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() | |
| 23 | * or genl mutex. Note : Please prefer genl_dereference() or rcu_dereference() | |
| 24 | */ | |
| 25 | #define rcu_dereference_genl(p) \ | |
| 26 | rcu_dereference_check(p, lockdep_genl_is_held()) | |
| 27 | ||
| 28 | /** | |
| 29 | * genl_dereference - fetch RCU pointer when updates are prevented by genl mutex | |
| 30 | * @p: The pointer to read, prior to dereferencing | |
| 31 | * | |
| 32 | * Return the value of the specified RCU-protected pointer, but omit | |
| 33 | * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because | |
| 34 | * caller holds genl mutex. | |
| 35 | */ | |
| 36 | #define genl_dereference(p) \ | |
| 37 | rcu_dereference_protected(p, lockdep_genl_is_held()) | |
| 38 | ||
| e9412c37 NH |
39 | #define MODULE_ALIAS_GENL_FAMILY(family)\ |
| 40 | MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family) | |
| 41 | ||
| 482a8524 | 42 | #endif /* __LINUX_GENERIC_NETLINK_H */ |