2 * connection tracking event cache.
5 #ifndef _NF_CONNTRACK_ECACHE_H
6 #define _NF_CONNTRACK_ECACHE_H
7 #include <net/netfilter/nf_conntrack.h>
9 #include <net/net_namespace.h>
10 #include <net/netfilter/nf_conntrack_expect.h>
11 #include <linux/netfilter/nf_conntrack_common.h>
12 #include <linux/netfilter/nf_conntrack_tuple_common.h>
13 #include <net/netfilter/nf_conntrack_extend.h>
15 struct nf_conntrack_ecache
{
16 unsigned long cache
; /* bitops want long */
17 unsigned long missed
; /* missed events */
18 u16 ctmask
; /* bitmask of ct events to be delivered */
19 u16 expmask
; /* bitmask of expect events to be delivered */
20 u32 portid
; /* netlink portid of destroyer */
23 static inline struct nf_conntrack_ecache
*
24 nf_ct_ecache_find(const struct nf_conn
*ct
)
26 #ifdef CONFIG_NF_CONNTRACK_EVENTS
27 return nf_ct_ext_find(ct
, NF_CT_EXT_ECACHE
);
33 static inline struct nf_conntrack_ecache
*
34 nf_ct_ecache_ext_add(struct nf_conn
*ct
, u16 ctmask
, u16 expmask
, gfp_t gfp
)
36 #ifdef CONFIG_NF_CONNTRACK_EVENTS
37 struct net
*net
= nf_ct_net(ct
);
38 struct nf_conntrack_ecache
*e
;
40 if (!ctmask
&& !expmask
&& net
->ct
.sysctl_events
) {
44 if (!ctmask
&& !expmask
)
47 e
= nf_ct_ext_add(ct
, NF_CT_EXT_ECACHE
, gfp
);
58 #ifdef CONFIG_NF_CONNTRACK_EVENTS
59 /* This structure is passed to event handler */
66 struct nf_ct_event_notifier
{
67 int (*fcn
)(unsigned int events
, struct nf_ct_event
*item
);
70 int nf_conntrack_register_notifier(struct net
*net
,
71 struct nf_ct_event_notifier
*nb
);
72 void nf_conntrack_unregister_notifier(struct net
*net
,
73 struct nf_ct_event_notifier
*nb
);
75 void nf_ct_deliver_cached_events(struct nf_conn
*ct
);
76 int nf_conntrack_eventmask_report(unsigned int eventmask
, struct nf_conn
*ct
,
77 u32 portid
, int report
);
80 nf_conntrack_event_cache(enum ip_conntrack_events event
, struct nf_conn
*ct
)
82 struct net
*net
= nf_ct_net(ct
);
83 struct nf_conntrack_ecache
*e
;
85 if (!rcu_access_pointer(net
->ct
.nf_conntrack_event_cb
))
88 e
= nf_ct_ecache_find(ct
);
92 set_bit(event
, &e
->cache
);
96 nf_conntrack_event_report(enum ip_conntrack_events event
, struct nf_conn
*ct
,
97 u32 portid
, int report
)
99 const struct net
*net
= nf_ct_net(ct
);
101 if (!rcu_access_pointer(net
->ct
.nf_conntrack_event_cb
))
104 return nf_conntrack_eventmask_report(1 << event
, ct
, portid
, report
);
108 nf_conntrack_event(enum ip_conntrack_events event
, struct nf_conn
*ct
)
110 const struct net
*net
= nf_ct_net(ct
);
112 if (!rcu_access_pointer(net
->ct
.nf_conntrack_event_cb
))
115 return nf_conntrack_eventmask_report(1 << event
, ct
, 0, 0);
118 struct nf_exp_event
{
119 struct nf_conntrack_expect
*exp
;
124 struct nf_exp_event_notifier
{
125 int (*fcn
)(unsigned int events
, struct nf_exp_event
*item
);
128 int nf_ct_expect_register_notifier(struct net
*net
,
129 struct nf_exp_event_notifier
*nb
);
130 void nf_ct_expect_unregister_notifier(struct net
*net
,
131 struct nf_exp_event_notifier
*nb
);
133 void nf_ct_expect_event_report(enum ip_conntrack_expect_events event
,
134 struct nf_conntrack_expect
*exp
,
135 u32 portid
, int report
);
137 int nf_conntrack_ecache_pernet_init(struct net
*net
);
138 void nf_conntrack_ecache_pernet_fini(struct net
*net
);
140 int nf_conntrack_ecache_init(void);
141 void nf_conntrack_ecache_fini(void);
143 static inline void nf_conntrack_ecache_delayed_work(struct net
*net
)
145 if (!delayed_work_pending(&net
->ct
.ecache_dwork
)) {
146 schedule_delayed_work(&net
->ct
.ecache_dwork
, HZ
);
147 net
->ct
.ecache_dwork_pending
= true;
151 static inline void nf_conntrack_ecache_work(struct net
*net
)
153 if (net
->ct
.ecache_dwork_pending
) {
154 net
->ct
.ecache_dwork_pending
= false;
155 mod_delayed_work(system_wq
, &net
->ct
.ecache_dwork
, 0);
158 #else /* CONFIG_NF_CONNTRACK_EVENTS */
159 static inline void nf_conntrack_event_cache(enum ip_conntrack_events event
,
160 struct nf_conn
*ct
) {}
161 static inline int nf_conntrack_eventmask_report(unsigned int eventmask
,
164 int report
) { return 0; }
165 static inline int nf_conntrack_event(enum ip_conntrack_events event
,
166 struct nf_conn
*ct
) { return 0; }
167 static inline int nf_conntrack_event_report(enum ip_conntrack_events event
,
170 int report
) { return 0; }
171 static inline void nf_ct_deliver_cached_events(const struct nf_conn
*ct
) {}
172 static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e
,
173 struct nf_conntrack_expect
*exp
,
177 static inline int nf_conntrack_ecache_pernet_init(struct net
*net
)
182 static inline void nf_conntrack_ecache_pernet_fini(struct net
*net
)
186 static inline int nf_conntrack_ecache_init(void)
191 static inline void nf_conntrack_ecache_fini(void)
195 static inline void nf_conntrack_ecache_delayed_work(struct net
*net
)
199 static inline void nf_conntrack_ecache_work(struct net
*net
)
202 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
204 #endif /*_NF_CONNTRACK_ECACHE_H*/