| /* |
| * connection tracking event cache. |
| */ |
| |
| #ifndef _NF_CONNTRACK_ECACHE_H |
| #define _NF_CONNTRACK_ECACHE_H |
| #include <net/netfilter/nf_conntrack.h> |
| |
| #include <linux/notifier.h> |
| #include <linux/interrupt.h> |
| #include <net/net_namespace.h> |
| #include <net/netfilter/nf_conntrack_expect.h> |
| |
| #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| struct nf_conntrack_ecache { |
| struct nf_conn *ct; |
| unsigned int events; |
| }; |
| |
| /* This structure is passed to event handler */ |
| struct nf_ct_event { |
| struct nf_conn *ct; |
| u32 pid; |
| int report; |
| }; |
| |
| extern struct atomic_notifier_head nf_conntrack_chain; |
| extern int nf_conntrack_register_notifier(struct notifier_block *nb); |
| extern int nf_conntrack_unregister_notifier(struct notifier_block *nb); |
| |
| extern void nf_ct_deliver_cached_events(const struct nf_conn *ct); |
| extern void __nf_ct_event_cache_init(struct nf_conn *ct); |
| extern void nf_ct_event_cache_flush(struct net *net); |
| |
| static inline void |
| nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct) |
| { |
| struct net *net = nf_ct_net(ct); |
| struct nf_conntrack_ecache *ecache; |
| |
| local_bh_disable(); |
| ecache = per_cpu_ptr(net->ct.ecache, raw_smp_processor_id()); |
| if (ct != ecache->ct) |
| __nf_ct_event_cache_init(ct); |
| ecache->events |= event; |
| local_bh_enable(); |
| } |
| |
| static inline void |
| nf_conntrack_event_report(enum ip_conntrack_events event, |
| struct nf_conn *ct, |
| u32 pid, |
| int report) |
| { |
| struct nf_ct_event item = { |
| .ct = ct, |
| .pid = pid, |
| .report = report |
| }; |
| if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) |
| atomic_notifier_call_chain(&nf_conntrack_chain, event, &item); |
| } |
| |
| static inline void |
| nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct) |
| { |
| nf_conntrack_event_report(event, ct, 0, 0); |
| } |
| |
| struct nf_exp_event { |
| struct nf_conntrack_expect *exp; |
| u32 pid; |
| int report; |
| }; |
| |
| extern struct atomic_notifier_head nf_ct_expect_chain; |
| extern int nf_ct_expect_register_notifier(struct notifier_block *nb); |
| extern int nf_ct_expect_unregister_notifier(struct notifier_block *nb); |
| |
| static inline void |
| nf_ct_expect_event_report(enum ip_conntrack_expect_events event, |
| struct nf_conntrack_expect *exp, |
| u32 pid, |
| int report) |
| { |
| struct nf_exp_event item = { |
| .exp = exp, |
| .pid = pid, |
| .report = report |
| }; |
| atomic_notifier_call_chain(&nf_ct_expect_chain, event, &item); |
| } |
| |
| static inline void |
| nf_ct_expect_event(enum ip_conntrack_expect_events event, |
| struct nf_conntrack_expect *exp) |
| { |
| nf_ct_expect_event_report(event, exp, 0, 0); |
| } |
| |
| extern int nf_conntrack_ecache_init(struct net *net); |
| extern void nf_conntrack_ecache_fini(struct net *net); |
| |
| #else /* CONFIG_NF_CONNTRACK_EVENTS */ |
| |
| static inline void nf_conntrack_event_cache(enum ip_conntrack_events event, |
| struct nf_conn *ct) {} |
| static inline void nf_conntrack_event(enum ip_conntrack_events event, |
| struct nf_conn *ct) {} |
| static inline void nf_conntrack_event_report(enum ip_conntrack_events event, |
| struct nf_conn *ct, |
| u32 pid, |
| int report) {} |
| static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {} |
| static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event, |
| struct nf_conntrack_expect *exp) {} |
| static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e, |
| struct nf_conntrack_expect *exp, |
| u32 pid, |
| int report) {} |
| static inline void nf_ct_event_cache_flush(struct net *net) {} |
| |
| static inline int nf_conntrack_ecache_init(struct net *net) |
| { |
| return 0; |
| } |
| |
| static inline void nf_conntrack_ecache_fini(struct net *net) |
| { |
| } |
| #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| |
| #endif /*_NF_CONNTRACK_ECACHE_H*/ |
| |