diff options
Diffstat (limited to 'ANDROID_3.4.5/include/net/netns/generic.h')
-rw-r--r-- | ANDROID_3.4.5/include/net/netns/generic.h | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/ANDROID_3.4.5/include/net/netns/generic.h b/ANDROID_3.4.5/include/net/netns/generic.h deleted file mode 100644 index 0931618c..00000000 --- a/ANDROID_3.4.5/include/net/netns/generic.h +++ /dev/null @@ -1,48 +0,0 @@ -/* - * generic net pointers - */ - -#ifndef __NET_GENERIC_H__ -#define __NET_GENERIC_H__ - -#include <linux/bug.h> -#include <linux/rcupdate.h> - -/* - * Generic net pointers are to be used by modules to put some private - * stuff on the struct net without explicit struct net modification - * - * The rules are simple: - * 1. set pernet_operations->id. After register_pernet_device you - * will have the id of your private pointer. - * 2. set pernet_operations->size to have the code allocate and free - * a private structure pointed to from struct net. - * 3. do not change this pointer while the net is alive; - * 4. do not try to have any private reference on the net_generic object. - * - * After accomplishing all of the above, the private pointer can be - * accessed with the net_generic() call. - */ - -struct net_generic { - unsigned int len; - struct rcu_head rcu; - - void *ptr[0]; -}; - -static inline void *net_generic(const struct net *net, int id) -{ - struct net_generic *ng; - void *ptr; - - rcu_read_lock(); - ng = rcu_dereference(net->gen); - BUG_ON(id == 0 || id > ng->len); - ptr = ng->ptr[id - 1]; - rcu_read_unlock(); - - BUG_ON(!ptr); - return ptr; -} -#endif |