29 void inet_twsk_bind_unhash(struct inet_timewait_sock *tw,  in inet_twsk_bind_unhash()  argument
32 	struct inet_bind2_bucket *tb2 = tw->tw_tb2;  in inet_twsk_bind_unhash()
33 	struct inet_bind_bucket *tb = tw->tw_tb;  in inet_twsk_bind_unhash()
38 	__hlist_del(&tw->tw_bind_node);  in inet_twsk_bind_unhash()
39 	tw->tw_tb = NULL;  in inet_twsk_bind_unhash()
42 	__hlist_del(&tw->tw_bind2_node);  in inet_twsk_bind_unhash()
43 	tw->tw_tb2 = NULL;  in inet_twsk_bind_unhash()
46 	__sock_put((struct sock *)tw);  in inet_twsk_bind_unhash()
50 static void inet_twsk_kill(struct inet_timewait_sock *tw)  in inet_twsk_kill()  argument
52 	struct inet_hashinfo *hashinfo = tw->tw_dr->hashinfo;  in inet_twsk_kill()
53 	spinlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash);  in inet_twsk_kill()
57 	sk_nulls_del_node_init_rcu((struct sock *)tw);  in inet_twsk_kill()
61 	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num,  in inet_twsk_kill()
63 	bhead2 = inet_bhashfn_portaddr(hashinfo, (struct sock *)tw,  in inet_twsk_kill()
64 				       twsk_net(tw), tw->tw_num);  in inet_twsk_kill()
68 	inet_twsk_bind_unhash(tw, hashinfo);  in inet_twsk_kill()
72 	refcount_dec(&tw->tw_dr->tw_refcount);  in inet_twsk_kill()
73 	inet_twsk_put(tw);  in inet_twsk_kill()
76 void inet_twsk_free(struct inet_timewait_sock *tw)  in inet_twsk_free()  argument
78 	struct module *owner = tw->tw_prot->owner;  in inet_twsk_free()
79 	twsk_destructor((struct sock *)tw);  in inet_twsk_free()
80 	kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw);  in inet_twsk_free()
84 void inet_twsk_put(struct inet_timewait_sock *tw)  in inet_twsk_put()  argument
86 	if (refcount_dec_and_test(&tw->tw_refcnt))  in inet_twsk_put()
87 		inet_twsk_free(tw);  in inet_twsk_put()
91 static void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw,  in inet_twsk_add_node_rcu()  argument
94 	hlist_nulls_add_head_rcu(&tw->tw_node, list);  in inet_twsk_add_node_rcu()
97 static void inet_twsk_add_bind_node(struct inet_timewait_sock *tw,  in inet_twsk_add_bind_node()  argument
100 	hlist_add_head(&tw->tw_bind_node, list);  in inet_twsk_add_bind_node()
103 static void inet_twsk_add_bind2_node(struct inet_timewait_sock *tw,  in inet_twsk_add_bind2_node()  argument
106 	hlist_add_head(&tw->tw_bind2_node, list);  in inet_twsk_add_bind2_node()
114 void inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,  in inet_twsk_hashdance()  argument
127 	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->inet_num,  in inet_twsk_hashdance()
129 	bhead2 = inet_bhashfn_portaddr(hashinfo, sk, twsk_net(tw), inet->inet_num);  in inet_twsk_hashdance()
134 	tw->tw_tb = icsk->icsk_bind_hash;  in inet_twsk_hashdance()
136 	inet_twsk_add_bind_node(tw, &tw->tw_tb->owners);  in inet_twsk_hashdance()
138 	tw->tw_tb2 = icsk->icsk_bind2_hash;  in inet_twsk_hashdance()
140 	inet_twsk_add_bind2_node(tw, &tw->tw_tb2->deathrow);  in inet_twsk_hashdance()
147 	inet_twsk_add_node_rcu(tw, &ehead->chain);  in inet_twsk_hashdance()
164 	refcount_set(&tw->tw_refcnt, 3);  in inet_twsk_hashdance()
170 	struct inet_timewait_sock *tw = from_timer(tw, t, tw_timer);  in tw_timer_handler()  local
172 	inet_twsk_kill(tw);  in tw_timer_handler()
179 	struct inet_timewait_sock *tw;  in inet_twsk_alloc()  local
185 	tw = kmem_cache_alloc(sk->sk_prot_creator->twsk_prot->twsk_slab,  in inet_twsk_alloc()
187 	if (tw) {  in inet_twsk_alloc()
190 		tw->tw_dr	    = dr;  in inet_twsk_alloc()
192 		tw->tw_daddr	    = inet->inet_daddr;  in inet_twsk_alloc()
193 		tw->tw_rcv_saddr    = inet->inet_rcv_saddr;  in inet_twsk_alloc()
194 		tw->tw_bound_dev_if = sk->sk_bound_dev_if;  in inet_twsk_alloc()
195 		tw->tw_tos	    = inet->tos;  in inet_twsk_alloc()
196 		tw->tw_num	    = inet->inet_num;  in inet_twsk_alloc()
197 		tw->tw_state	    = TCP_TIME_WAIT;  in inet_twsk_alloc()
198 		tw->tw_substate	    = state;  in inet_twsk_alloc()
199 		tw->tw_sport	    = inet->inet_sport;  in inet_twsk_alloc()
200 		tw->tw_dport	    = inet->inet_dport;  in inet_twsk_alloc()
201 		tw->tw_family	    = sk->sk_family;  in inet_twsk_alloc()
202 		tw->tw_reuse	    = sk->sk_reuse;  in inet_twsk_alloc()
203 		tw->tw_reuseport    = sk->sk_reuseport;  in inet_twsk_alloc()
204 		tw->tw_hash	    = sk->sk_hash;  in inet_twsk_alloc()
205 		tw->tw_ipv6only	    = 0;  in inet_twsk_alloc()
206 		tw->tw_transparent  = inet_test_bit(TRANSPARENT, sk);  in inet_twsk_alloc()
207 		tw->tw_prot	    = sk->sk_prot_creator;  in inet_twsk_alloc()
208 		atomic64_set(&tw->tw_cookie, atomic64_read(&sk->sk_cookie));  in inet_twsk_alloc()
209 		twsk_net_set(tw, sock_net(sk));  in inet_twsk_alloc()
210 		timer_setup(&tw->tw_timer, tw_timer_handler, TIMER_PINNED);  in inet_twsk_alloc()
216 		refcount_set(&tw->tw_refcnt, 0);  in inet_twsk_alloc()
218 		__module_get(tw->tw_prot->owner);  in inet_twsk_alloc()
221 	return tw;  in inet_twsk_alloc()
233 void inet_twsk_deschedule_put(struct inet_timewait_sock *tw)  in inet_twsk_deschedule_put()  argument
235 	if (del_timer_sync(&tw->tw_timer))  in inet_twsk_deschedule_put()
236 		inet_twsk_kill(tw);  in inet_twsk_deschedule_put()
237 	inet_twsk_put(tw);  in inet_twsk_deschedule_put()
241 void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, bool rearm)  in __inet_twsk_schedule()  argument
271 		__NET_INC_STATS(twsk_net(tw), kill ? LINUX_MIB_TIMEWAITKILLED :  in __inet_twsk_schedule()
273 		BUG_ON(mod_timer(&tw->tw_timer, jiffies + timeo));  in __inet_twsk_schedule()
274 		refcount_inc(&tw->tw_dr->tw_refcount);  in __inet_twsk_schedule()
276 		mod_timer_pending(&tw->tw_timer, jiffies + timeo);  in __inet_twsk_schedule()
283 	struct inet_timewait_sock *tw;  in inet_twsk_purge()  local
310 			tw = inet_twsk(sk);  in inet_twsk_purge()
311 			if ((tw->tw_family != family) ||  in inet_twsk_purge()
312 				refcount_read(&twsk_net(tw)->ns.count))  in inet_twsk_purge()
315 			if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))  in inet_twsk_purge()
318 			if (unlikely((tw->tw_family != family) ||  in inet_twsk_purge()
319 				     refcount_read(&twsk_net(tw)->ns.count))) {  in inet_twsk_purge()
320 				inet_twsk_put(tw);  in inet_twsk_purge()
326 			inet_twsk_deschedule_put(tw);  in inet_twsk_purge()