/* SPDX-License-Identifier: GPL-2.0 */ /* * 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 { union { struct { unsigned int len; struct rcu_head rcu; } s; void *ptr[0]; }; }; static inline void *net_generic(const struct net *net, unsigned int id) { struct net_generic *ng; void *ptr; rcu_read_lock(); ng = rcu_dereference(net->gen); ptr = ng->ptr[id]; rcu_read_unlock(); return ptr; } #endif
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
can.h | File | 1.08 KB | 0644 |
|
conntrack.h | File | 2.72 KB | 0644 |
|
core.h | File | 285 B | 0644 |
|
dccp.h | File | 185 B | 0644 |
|
generic.h | File | 1.15 KB | 0644 |
|
hash.h | File | 212 B | 0644 |
|
ieee802154_6lowpan.h | File | 399 B | 0644 |
|
ipv4.h | File | 5.2 KB | 0644 |
|
ipv6.h | File | 2.64 KB | 0644 |
|
mib.h | File | 986 B | 0644 |
|
mpls.h | File | 371 B | 0644 |
|
netfilter.h | File | 689 B | 0644 |
|
nftables.h | File | 440 B | 0644 |
|
packet.h | File | 295 B | 0644 |
|
sctp.h | File | 3.83 KB | 0644 |
|
unix.h | File | 263 B | 0644 |
|
x_tables.h | File | 507 B | 0644 |
|
xfrm.h | File | 1.84 KB | 0644 |
|