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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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* generic net pointers
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*/
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#ifndef __NET_GENERIC_H__
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#define __NET_GENERIC_H__
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#include <linux/bug.h>
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#include <linux/rcupdate.h>
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/*
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* Generic net pointers are to be used by modules to put some private
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* stuff on the struct net without explicit struct net modification
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*
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* The rules are simple:
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* 1. set pernet_operations->id. After register_pernet_device you
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* will have the id of your private pointer.
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* 2. set pernet_operations->size to have the code allocate and free
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* a private structure pointed to from struct net.
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* 3. do not change this pointer while the net is alive;
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* 4. do not try to have any private reference on the net_generic object.
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*
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* After accomplishing all of the above, the private pointer can be
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* accessed with the net_generic() call.
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*/
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struct net_generic {
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unsigned int len;
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struct rcu_head rcu;
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void *ptr[0];
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};
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static inline void *net_generic(const struct net *net, int id)
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{
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struct net_generic *ng;
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void *ptr;
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rcu_read_lock();
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ng = rcu_dereference(net->gen);
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ptr = ng->ptr[id - 1];
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rcu_read_unlock();
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return ptr;
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}
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#endif
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