28 void inet_twsk_bind_unhash(struct inet_timewait_sock *tw,  in inet_twsk_bind_unhash()  argument
31 	struct inet_bind_bucket *tb = tw->tw_tb;  in inet_twsk_bind_unhash()
36 	__hlist_del(&tw->tw_bind_node);  in inet_twsk_bind_unhash()
37 	tw->tw_tb = NULL;  in inet_twsk_bind_unhash()
39 	__sock_put((struct sock *)tw);  in inet_twsk_bind_unhash()
43 static void inet_twsk_kill(struct inet_timewait_sock *tw)  in inet_twsk_kill()  argument
45 	struct inet_hashinfo *hashinfo = tw->tw_dr->hashinfo;  in inet_twsk_kill()
46 	spinlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash);  in inet_twsk_kill()
50 	sk_nulls_del_node_init_rcu((struct sock *)tw);  in inet_twsk_kill()
54 	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num,  in inet_twsk_kill()
58 	inet_twsk_bind_unhash(tw, hashinfo);  in inet_twsk_kill()
61 	atomic_dec(&tw->tw_dr->tw_count);  in inet_twsk_kill()
62 	inet_twsk_put(tw);  in inet_twsk_kill()
65 void inet_twsk_free(struct inet_timewait_sock *tw)  in inet_twsk_free()  argument
67 	struct module *owner = tw->tw_prot->owner;  in inet_twsk_free()
68 	twsk_destructor((struct sock *)tw);  in inet_twsk_free()
70 	pr_debug("%s timewait_sock %p released\n", tw->tw_prot->name, tw);  in inet_twsk_free()
72 	kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw);  in inet_twsk_free()
76 void inet_twsk_put(struct inet_timewait_sock *tw)  in inet_twsk_put()  argument
78 	if (refcount_dec_and_test(&tw->tw_refcnt))  in inet_twsk_put()
79 		inet_twsk_free(tw);  in inet_twsk_put()
83 static void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw,  in inet_twsk_add_node_rcu()  argument
86 	hlist_nulls_add_head_rcu(&tw->tw_node, list);  in inet_twsk_add_node_rcu()
89 static void inet_twsk_add_bind_node(struct inet_timewait_sock *tw,  in inet_twsk_add_bind_node()  argument
92 	hlist_add_head(&tw->tw_bind_node, list);  in inet_twsk_add_bind_node()
100 void inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,  in inet_twsk_hashdance()  argument
112 	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->inet_num,  in inet_twsk_hashdance()
115 	tw->tw_tb = icsk->icsk_bind_hash;  in inet_twsk_hashdance()
117 	inet_twsk_add_bind_node(tw, &tw->tw_tb->owners);  in inet_twsk_hashdance()
122 	inet_twsk_add_node_rcu(tw, &ehead->chain);  in inet_twsk_hashdance()
139 	refcount_set(&tw->tw_refcnt, 3);  in inet_twsk_hashdance()
145 	struct inet_timewait_sock *tw = from_timer(tw, t, tw_timer);  in tw_timer_handler()  local
147 	if (tw->tw_kill)  in tw_timer_handler()
148 		__NET_INC_STATS(twsk_net(tw), LINUX_MIB_TIMEWAITKILLED);  in tw_timer_handler()
150 		__NET_INC_STATS(twsk_net(tw), LINUX_MIB_TIMEWAITED);  in tw_timer_handler()
151 	inet_twsk_kill(tw);  in tw_timer_handler()
158 	struct inet_timewait_sock *tw;  in inet_twsk_alloc()  local
163 	tw = kmem_cache_alloc(sk->sk_prot_creator->twsk_prot->twsk_slab,  in inet_twsk_alloc()
165 	if (tw) {  in inet_twsk_alloc()
168 		tw->tw_dr	    = dr;  in inet_twsk_alloc()
170 		tw->tw_daddr	    = inet->inet_daddr;  in inet_twsk_alloc()
171 		tw->tw_rcv_saddr    = inet->inet_rcv_saddr;  in inet_twsk_alloc()
172 		tw->tw_bound_dev_if = sk->sk_bound_dev_if;  in inet_twsk_alloc()
173 		tw->tw_tos	    = inet->tos;  in inet_twsk_alloc()
174 		tw->tw_num	    = inet->inet_num;  in inet_twsk_alloc()
175 		tw->tw_state	    = TCP_TIME_WAIT;  in inet_twsk_alloc()
176 		tw->tw_substate	    = state;  in inet_twsk_alloc()
177 		tw->tw_sport	    = inet->inet_sport;  in inet_twsk_alloc()
178 		tw->tw_dport	    = inet->inet_dport;  in inet_twsk_alloc()
179 		tw->tw_family	    = sk->sk_family;  in inet_twsk_alloc()
180 		tw->tw_reuse	    = sk->sk_reuse;  in inet_twsk_alloc()
181 		tw->tw_reuseport    = sk->sk_reuseport;  in inet_twsk_alloc()
182 		tw->tw_hash	    = sk->sk_hash;  in inet_twsk_alloc()
183 		tw->tw_ipv6only	    = 0;  in inet_twsk_alloc()
184 		tw->tw_transparent  = inet->transparent;  in inet_twsk_alloc()
185 		tw->tw_prot	    = sk->sk_prot_creator;  in inet_twsk_alloc()
186 		atomic64_set(&tw->tw_cookie, atomic64_read(&sk->sk_cookie));  in inet_twsk_alloc()
187 		twsk_net_set(tw, sock_net(sk));  in inet_twsk_alloc()
188 		timer_setup(&tw->tw_timer, tw_timer_handler, TIMER_PINNED);  in inet_twsk_alloc()
194 		refcount_set(&tw->tw_refcnt, 0);  in inet_twsk_alloc()
196 		__module_get(tw->tw_prot->owner);  in inet_twsk_alloc()
199 	return tw;  in inet_twsk_alloc()
211 void inet_twsk_deschedule_put(struct inet_timewait_sock *tw)  in inet_twsk_deschedule_put()  argument
213 	if (del_timer_sync(&tw->tw_timer))  in inet_twsk_deschedule_put()
214 		inet_twsk_kill(tw);  in inet_twsk_deschedule_put()
215 	inet_twsk_put(tw);  in inet_twsk_deschedule_put()
219 void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, bool rearm)  in __inet_twsk_schedule()  argument
246 	tw->tw_kill = timeo <= 4*HZ;  in __inet_twsk_schedule()
248 		BUG_ON(mod_timer(&tw->tw_timer, jiffies + timeo));  in __inet_twsk_schedule()
249 		atomic_inc(&tw->tw_dr->tw_count);  in __inet_twsk_schedule()
251 		mod_timer_pending(&tw->tw_timer, jiffies + timeo);  in __inet_twsk_schedule()
258 	struct inet_timewait_sock *tw;  in inet_twsk_purge()  local
272 			tw = inet_twsk(sk);  in inet_twsk_purge()
273 			if ((tw->tw_family != family) ||  in inet_twsk_purge()
274 				refcount_read(&twsk_net(tw)->count))  in inet_twsk_purge()
277 			if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))  in inet_twsk_purge()
280 			if (unlikely((tw->tw_family != family) ||  in inet_twsk_purge()
281 				     refcount_read(&twsk_net(tw)->count))) {  in inet_twsk_purge()
282 				inet_twsk_put(tw);  in inet_twsk_purge()
288 			inet_twsk_deschedule_put(tw);  in inet_twsk_purge()