47 static u32 sk_ehashfn(const struct sock *sk)  in sk_ehashfn()  argument
50 	if (sk->sk_family == AF_INET6 &&  in sk_ehashfn()
51 	    !ipv6_addr_v4mapped(&sk->sk_v6_daddr))  in sk_ehashfn()
52 		return inet6_ehashfn(sock_net(sk),  in sk_ehashfn()
53 				     &sk->sk_v6_rcv_saddr, sk->sk_num,  in sk_ehashfn()
54 				     &sk->sk_v6_daddr, sk->sk_dport);  in sk_ehashfn()
56 	return inet_ehashfn(sock_net(sk),  in sk_ehashfn()
57 			    sk->sk_rcv_saddr, sk->sk_num,  in sk_ehashfn()
58 			    sk->sk_daddr, sk->sk_dport);  in sk_ehashfn()
107 				   const struct sock *sk)  in inet_bind2_bucket_init()  argument
113 	tb->family    = sk->sk_family;  in inet_bind2_bucket_init()
114 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_init()
115 		tb->v6_rcv_saddr = sk->sk_v6_rcv_saddr;  in inet_bind2_bucket_init()
118 		tb->rcv_saddr = sk->sk_rcv_saddr;  in inet_bind2_bucket_init()
129 						   const struct sock *sk)  in inet_bind2_bucket_create()  argument
134 		inet_bind2_bucket_init(tb, net, head, port, l3mdev, sk);  in inet_bind2_bucket_create()
149 					 const struct sock *sk)  in inet_bind2_bucket_addr_match()  argument
152 	if (sk->sk_family != tb2->family) {  in inet_bind2_bucket_addr_match()
153 		if (sk->sk_family == AF_INET)  in inet_bind2_bucket_addr_match()
155 				tb2->v6_rcv_saddr.s6_addr32[3] == sk->sk_rcv_saddr;  in inet_bind2_bucket_addr_match()
157 		return ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr) &&  in inet_bind2_bucket_addr_match()
158 			sk->sk_v6_rcv_saddr.s6_addr32[3] == tb2->rcv_saddr;  in inet_bind2_bucket_addr_match()
161 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_addr_match()
163 				       &sk->sk_v6_rcv_saddr);  in inet_bind2_bucket_addr_match()
165 	return tb2->rcv_saddr == sk->sk_rcv_saddr;  in inet_bind2_bucket_addr_match()
168 void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,  in inet_bind_hash()  argument
171 	inet_sk(sk)->inet_num = port;  in inet_bind_hash()
172 	sk_add_bind_node(sk, &tb->owners);  in inet_bind_hash()
173 	inet_csk(sk)->icsk_bind_hash = tb;  in inet_bind_hash()
174 	sk_add_bind2_node(sk, &tb2->owners);  in inet_bind_hash()
175 	inet_csk(sk)->icsk_bind2_hash = tb2;  in inet_bind_hash()
181 static void __inet_put_port(struct sock *sk)  in __inet_put_port()  argument
183 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_put_port()
185 	struct net *net = sock_net(sk);  in __inet_put_port()
189 	bhash = inet_bhashfn(net, inet_sk(sk)->inet_num, hashinfo->bhash_size);  in __inet_put_port()
191 	head2 = inet_bhashfn_portaddr(hashinfo, sk, net, inet_sk(sk)->inet_num);  in __inet_put_port()
194 	tb = inet_csk(sk)->icsk_bind_hash;  in __inet_put_port()
195 	__sk_del_bind_node(sk);  in __inet_put_port()
196 	inet_csk(sk)->icsk_bind_hash = NULL;  in __inet_put_port()
197 	inet_sk(sk)->inet_num = 0;  in __inet_put_port()
201 	if (inet_csk(sk)->icsk_bind2_hash) {  in __inet_put_port()
202 		struct inet_bind2_bucket *tb2 = inet_csk(sk)->icsk_bind2_hash;  in __inet_put_port()
204 		__sk_del_bind2_node(sk);  in __inet_put_port()
205 		inet_csk(sk)->icsk_bind2_hash = NULL;  in __inet_put_port()
213 void inet_put_port(struct sock *sk)  in inet_put_port()  argument
216 	__inet_put_port(sk);  in inet_put_port()
221 int __inet_inherit_port(const struct sock *sk, struct sock *child)  in __inet_inherit_port()  argument
223 	struct inet_hashinfo *table = tcp_or_dccp_get_hashinfo(sk);  in __inet_inherit_port()
227 	struct net *net = sock_net(sk);  in __inet_inherit_port()
239 	tb = inet_csk(sk)->icsk_bind_hash;  in __inet_inherit_port()
240 	tb2 = inet_csk(sk)->icsk_bind2_hash;  in __inet_inherit_port()
247 		l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_inherit_port()
272 		l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_inherit_port()
302 inet_lhash2_bucket_sk(struct inet_hashinfo *h, struct sock *sk)  in inet_lhash2_bucket_sk()  argument
307 	if (sk->sk_family == AF_INET6)  in inet_lhash2_bucket_sk()
308 		hash = ipv6_portaddr_hash(sock_net(sk),  in inet_lhash2_bucket_sk()
309 					  &sk->sk_v6_rcv_saddr,  in inet_lhash2_bucket_sk()
310 					  inet_sk(sk)->inet_num);  in inet_lhash2_bucket_sk()
313 		hash = ipv4_portaddr_hash(sock_net(sk),  in inet_lhash2_bucket_sk()
314 					  inet_sk(sk)->inet_rcv_saddr,  in inet_lhash2_bucket_sk()
315 					  inet_sk(sk)->inet_num);  in inet_lhash2_bucket_sk()
319 static inline int compute_score(struct sock *sk, struct net *net,  in compute_score()  argument
325 	if (net_eq(sock_net(sk), net) && sk->sk_num == hnum &&  in compute_score()
326 			!ipv6_only_sock(sk)) {  in compute_score()
327 		if (sk->sk_rcv_saddr != daddr)  in compute_score()
330 		if (!inet_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif))  in compute_score()
332 		score =  sk->sk_bound_dev_if ? 2 : 1;  in compute_score()
334 		if (sk->sk_family == PF_INET)  in compute_score()
336 		if (READ_ONCE(sk->sk_incoming_cpu) == raw_smp_processor_id())  in compute_score()
357 struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,  in inet_lookup_reuseport()  argument
366 	if (sk->sk_reuseport) {  in inet_lookup_reuseport()
369 		reuse_sk = reuseport_select_sock(sk, phash, skb, doff);  in inet_lookup_reuseport()
390 	struct sock *sk, *result = NULL;  in inet_lhash2_lookup()  local
394 	sk_nulls_for_each_rcu(sk, node, &ilb2->nulls_head) {  in inet_lhash2_lookup()
395 		score = compute_score(sk, net, hnum, daddr, dif, sdif);  in inet_lhash2_lookup()
397 			result = inet_lookup_reuseport(net, sk, skb, doff,  in inet_lhash2_lookup()
402 			result = sk;  in inet_lhash2_lookup()
417 	struct sock *sk, *reuse_sk;  in inet_lookup_run_sk_lookup()  local
421 					    daddr, hnum, dif, &sk);  in inet_lookup_run_sk_lookup()
422 	if (no_reuseport || IS_ERR_OR_NULL(sk))  in inet_lookup_run_sk_lookup()
423 		return sk;  in inet_lookup_run_sk_lookup()
425 	reuse_sk = inet_lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum,  in inet_lookup_run_sk_lookup()
428 		sk = reuse_sk;  in inet_lookup_run_sk_lookup()
429 	return sk;  in inet_lookup_run_sk_lookup()
477 void sock_gen_put(struct sock *sk)  in sock_gen_put()  argument
479 	if (!refcount_dec_and_test(&sk->sk_refcnt))  in sock_gen_put()
482 	if (sk->sk_state == TCP_TIME_WAIT)  in sock_gen_put()
483 		inet_twsk_free(inet_twsk(sk));  in sock_gen_put()
484 	else if (sk->sk_state == TCP_NEW_SYN_RECV)  in sock_gen_put()
485 		reqsk_free(inet_reqsk(sk));  in sock_gen_put()
487 		sk_free(sk);  in sock_gen_put()
493 	sock_gen_put(skb->sk);  in sock_edemux()
505 	struct sock *sk;  in __inet_lookup_established()  local
515 	sk_nulls_for_each_rcu(sk, node, &head->chain) {  in __inet_lookup_established()
516 		if (sk->sk_hash != hash)  in __inet_lookup_established()
518 		if (likely(inet_match(net, sk, acookie, ports, dif, sdif))) {  in __inet_lookup_established()
519 			if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt)))  in __inet_lookup_established()
521 			if (unlikely(!inet_match(net, sk, acookie,  in __inet_lookup_established()
523 				sock_gen_put(sk);  in __inet_lookup_established()
537 	sk = NULL;  in __inet_lookup_established()
539 	return sk;  in __inet_lookup_established()
545 				    struct sock *sk, __u16 lport,  in __inet_check_established()  argument
549 	struct inet_sock *inet = inet_sk(sk);  in __inet_check_established()
552 	int dif = sk->sk_bound_dev_if;  in __inet_check_established()
553 	struct net *net = sock_net(sk);  in __inet_check_established()
574 				if (twsk_unique(sk, sk2, twp))  in __inet_check_established()
586 	sk->sk_hash = hash;  in __inet_check_established()
587 	WARN_ON(!sk_unhashed(sk));  in __inet_check_established()
588 	__sk_nulls_add_node_rcu(sk, &head->chain);  in __inet_check_established()
594 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in __inet_check_established()
609 static u64 inet_sk_port_offset(const struct sock *sk)  in inet_sk_port_offset()  argument
611 	const struct inet_sock *inet = inet_sk(sk);  in inet_sk_port_offset()
621 static bool inet_ehash_lookup_by_sk(struct sock *sk,  in inet_ehash_lookup_by_sk()  argument
624 	const __portpair ports = INET_COMBINED_PORTS(sk->sk_dport, sk->sk_num);  in inet_ehash_lookup_by_sk()
625 	const int sdif = sk->sk_bound_dev_if;  in inet_ehash_lookup_by_sk()
626 	const int dif = sk->sk_bound_dev_if;  in inet_ehash_lookup_by_sk()
628 	struct net *net = sock_net(sk);  in inet_ehash_lookup_by_sk()
631 	INET_ADDR_COOKIE(acookie, sk->sk_daddr, sk->sk_rcv_saddr);  in inet_ehash_lookup_by_sk()
634 		if (esk->sk_hash != sk->sk_hash)  in inet_ehash_lookup_by_sk()
636 		if (sk->sk_family == AF_INET) {  in inet_ehash_lookup_by_sk()
643 		else if (sk->sk_family == AF_INET6) {  in inet_ehash_lookup_by_sk()
645 						 &sk->sk_v6_daddr,  in inet_ehash_lookup_by_sk()
646 						 &sk->sk_v6_rcv_saddr,  in inet_ehash_lookup_by_sk()
661 bool inet_ehash_insert(struct sock *sk, struct sock *osk, bool *found_dup_sk)  in inet_ehash_insert()  argument
663 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_ehash_insert()
669 	WARN_ON_ONCE(!sk_unhashed(sk));  in inet_ehash_insert()
671 	sk->sk_hash = sk_ehashfn(sk);  in inet_ehash_insert()
672 	head = inet_ehash_bucket(hashinfo, sk->sk_hash);  in inet_ehash_insert()
674 	lock = inet_ehash_lockp(hashinfo, sk->sk_hash);  in inet_ehash_insert()
678 		WARN_ON_ONCE(sk->sk_hash != osk->sk_hash);  in inet_ehash_insert()
681 		*found_dup_sk = inet_ehash_lookup_by_sk(sk, list);  in inet_ehash_insert()
687 		__sk_nulls_add_node_rcu(sk, list);  in inet_ehash_insert()
694 bool inet_ehash_nolisten(struct sock *sk, struct sock *osk, bool *found_dup_sk)  in inet_ehash_nolisten()  argument
696 	bool ok = inet_ehash_insert(sk, osk, found_dup_sk);  in inet_ehash_nolisten()
699 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in inet_ehash_nolisten()
701 		this_cpu_inc(*sk->sk_prot->orphan_count);  in inet_ehash_nolisten()
702 		inet_sk_set_state(sk, TCP_CLOSE);  in inet_ehash_nolisten()
703 		sock_set_flag(sk, SOCK_DEAD);  in inet_ehash_nolisten()
704 		inet_csk_destroy_sock(sk);  in inet_ehash_nolisten()
710 static int inet_reuseport_add_sock(struct sock *sk,  in inet_reuseport_add_sock()  argument
713 	struct inet_bind_bucket *tb = inet_csk(sk)->icsk_bind_hash;  in inet_reuseport_add_sock()
716 	kuid_t uid = sock_i_uid(sk);  in inet_reuseport_add_sock()
719 		if (sk2 != sk &&  in inet_reuseport_add_sock()
720 		    sk2->sk_family == sk->sk_family &&  in inet_reuseport_add_sock()
721 		    ipv6_only_sock(sk2) == ipv6_only_sock(sk) &&  in inet_reuseport_add_sock()
722 		    sk2->sk_bound_dev_if == sk->sk_bound_dev_if &&  in inet_reuseport_add_sock()
725 		    inet_rcv_saddr_equal(sk, sk2, false))  in inet_reuseport_add_sock()
726 			return reuseport_add_sock(sk, sk2,  in inet_reuseport_add_sock()
727 						  inet_rcv_saddr_any(sk));  in inet_reuseport_add_sock()
730 	return reuseport_alloc(sk, inet_rcv_saddr_any(sk));  in inet_reuseport_add_sock()
733 int __inet_hash(struct sock *sk, struct sock *osk)  in __inet_hash()  argument
735 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_hash()
739 	if (sk->sk_state != TCP_LISTEN) {  in __inet_hash()
741 		inet_ehash_nolisten(sk, osk, NULL);  in __inet_hash()
745 	WARN_ON(!sk_unhashed(sk));  in __inet_hash()
746 	ilb2 = inet_lhash2_bucket_sk(hashinfo, sk);  in __inet_hash()
749 	if (sk->sk_reuseport) {  in __inet_hash()
750 		err = inet_reuseport_add_sock(sk, ilb2);  in __inet_hash()
754 	if (IS_ENABLED(CONFIG_IPV6) && sk->sk_reuseport &&  in __inet_hash()
755 		sk->sk_family == AF_INET6)  in __inet_hash()
756 		__sk_nulls_add_node_tail_rcu(sk, &ilb2->nulls_head);  in __inet_hash()
758 		__sk_nulls_add_node_rcu(sk, &ilb2->nulls_head);  in __inet_hash()
759 	sock_set_flag(sk, SOCK_RCU_FREE);  in __inet_hash()
760 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in __inet_hash()
768 int inet_hash(struct sock *sk)  in inet_hash()  argument
772 	if (sk->sk_state != TCP_CLOSE)  in inet_hash()
773 		err = __inet_hash(sk, NULL);  in inet_hash()
779 void inet_unhash(struct sock *sk)  in inet_unhash()  argument
781 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_unhash()
783 	if (sk_unhashed(sk))  in inet_unhash()
786 	if (sk->sk_state == TCP_LISTEN) {  in inet_unhash()
789 		ilb2 = inet_lhash2_bucket_sk(hashinfo, sk);  in inet_unhash()
794 		if (sk_unhashed(sk)) {  in inet_unhash()
799 		if (rcu_access_pointer(sk->sk_reuseport_cb))  in inet_unhash()
800 			reuseport_stop_listen_sock(sk);  in inet_unhash()
802 		__sk_nulls_del_node_init_rcu(sk);  in inet_unhash()
803 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);  in inet_unhash()
806 		spinlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash);  in inet_unhash()
809 		if (sk_unhashed(sk)) {  in inet_unhash()
813 		__sk_nulls_del_node_init_rcu(sk);  in inet_unhash()
814 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);  in inet_unhash()
822 				    int l3mdev, const struct sock *sk)  in inet_bind2_bucket_match()  argument
828 	return inet_bind2_bucket_addr_match(tb, sk);  in inet_bind2_bucket_match()
832 				      unsigned short port, int l3mdev, const struct sock *sk)  in inet_bind2_bucket_match_addr_any()  argument
839 	if (sk->sk_family != tb->family) {  in inet_bind2_bucket_match_addr_any()
840 		if (sk->sk_family == AF_INET)  in inet_bind2_bucket_match_addr_any()
847 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_match_addr_any()
856 		       unsigned short port, int l3mdev, const struct sock *sk)  in inet_bind2_bucket_find()  argument
861 		if (inet_bind2_bucket_match(bhash2, net, port, l3mdev, sk))  in inet_bind2_bucket_find()
868 inet_bhash2_addr_any_hashbucket(const struct sock *sk, const struct net *net, int port)  in inet_bhash2_addr_any_hashbucket()  argument
870 	struct inet_hashinfo *hinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_bhash2_addr_any_hashbucket()
874 	if (sk->sk_family == AF_INET6)  in inet_bhash2_addr_any_hashbucket()
883 static void inet_update_saddr(struct sock *sk, void *saddr, int family)  in inet_update_saddr()  argument
886 		inet_sk(sk)->inet_saddr = *(__be32 *)saddr;  in inet_update_saddr()
887 		sk_rcv_saddr_set(sk, inet_sk(sk)->inet_saddr);  in inet_update_saddr()
891 		sk->sk_v6_rcv_saddr = *(struct in6_addr *)saddr;  in inet_update_saddr()
896 static int __inet_bhash2_update_saddr(struct sock *sk, void *saddr, int family, bool reset)  in __inet_bhash2_update_saddr()  argument
898 	struct inet_hashinfo *hinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_bhash2_update_saddr()
901 	int l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_bhash2_update_saddr()
902 	int port = inet_sk(sk)->inet_num;  in __inet_bhash2_update_saddr()
903 	struct net *net = sock_net(sk);  in __inet_bhash2_update_saddr()
906 	if (!inet_csk(sk)->icsk_bind2_hash) {  in __inet_bhash2_update_saddr()
909 			inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
911 			inet_update_saddr(sk, saddr, family);  in __inet_bhash2_update_saddr()
928 			inet_put_port(sk);  in __inet_bhash2_update_saddr()
929 			inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
937 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_bhash2_update_saddr()
945 	__sk_del_bind2_node(sk);  in __inet_bhash2_update_saddr()
946 	inet_bind2_bucket_destroy(hinfo->bind2_bucket_cachep, inet_csk(sk)->icsk_bind2_hash);  in __inet_bhash2_update_saddr()
950 		inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
952 		inet_update_saddr(sk, saddr, family);  in __inet_bhash2_update_saddr()
954 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_bhash2_update_saddr()
957 	tb2 = inet_bind2_bucket_find(head2, net, port, l3mdev, sk);  in __inet_bhash2_update_saddr()
960 		inet_bind2_bucket_init(tb2, net, head2, port, l3mdev, sk);  in __inet_bhash2_update_saddr()
962 	sk_add_bind2_node(sk, &tb2->owners);  in __inet_bhash2_update_saddr()
963 	inet_csk(sk)->icsk_bind2_hash = tb2;  in __inet_bhash2_update_saddr()
974 int inet_bhash2_update_saddr(struct sock *sk, void *saddr, int family)  in inet_bhash2_update_saddr()  argument
976 	return __inet_bhash2_update_saddr(sk, saddr, family, false);  in inet_bhash2_update_saddr()
980 void inet_bhash2_reset_saddr(struct sock *sk)  in inet_bhash2_reset_saddr()  argument
982 	if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK))  in inet_bhash2_reset_saddr()
983 		__inet_bhash2_update_saddr(sk, NULL, 0, true);  in inet_bhash2_reset_saddr()
1001 		struct sock *sk, u64 port_offset,  in __inet_hash_connect()  argument
1008 	int port = inet_sk(sk)->inet_num;  in __inet_hash_connect()
1009 	struct net *net = sock_net(sk);  in __inet_hash_connect()
1020 		ret = check_established(death_row, sk, port, NULL);  in __inet_hash_connect()
1025 	l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_hash_connect()
1027 	inet_sk_get_local_port_range(sk, &low, &high);  in __inet_hash_connect()
1064 				if (!check_established(death_row, sk,  in __inet_hash_connect()
1096 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_hash_connect()
1099 	tb2 = inet_bind2_bucket_find(head2, net, port, l3mdev, sk);  in __inet_hash_connect()
1102 					       head2, port, l3mdev, sk);  in __inet_hash_connect()
1116 	inet_bind_hash(sk, tb, tb2, port);  in __inet_hash_connect()
1118 	if (sk_unhashed(sk)) {  in __inet_hash_connect()
1119 		inet_sk(sk)->inet_sport = htons(port);  in __inet_hash_connect()
1120 		inet_ehash_nolisten(sk, (struct sock *)tw, NULL);  in __inet_hash_connect()
1145 		      struct sock *sk)  in inet_hash_connect()  argument
1149 	if (!inet_sk(sk)->inet_num)  in inet_hash_connect()
1150 		port_offset = inet_sk_port_offset(sk);  in inet_hash_connect()
1151 	return __inet_hash_connect(death_row, sk, port_offset,  in inet_hash_connect()