46 static u32 sk_ehashfn(const struct sock *sk)  in sk_ehashfn()  argument
49 	if (sk->sk_family == AF_INET6 &&  in sk_ehashfn()
50 	    !ipv6_addr_v4mapped(&sk->sk_v6_daddr))  in sk_ehashfn()
51 		return inet6_ehashfn(sock_net(sk),  in sk_ehashfn()
52 				     &sk->sk_v6_rcv_saddr, sk->sk_num,  in sk_ehashfn()
53 				     &sk->sk_v6_daddr, sk->sk_dport);  in sk_ehashfn()
55 	return inet_ehashfn(sock_net(sk),  in sk_ehashfn()
56 			    sk->sk_rcv_saddr, sk->sk_num,  in sk_ehashfn()
57 			    sk->sk_daddr, sk->sk_dport);  in sk_ehashfn()
106 				   const struct sock *sk)  in inet_bind2_bucket_init()  argument
112 	tb->family    = sk->sk_family;  in inet_bind2_bucket_init()
113 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_init()
114 		tb->v6_rcv_saddr = sk->sk_v6_rcv_saddr;  in inet_bind2_bucket_init()
117 		tb->rcv_saddr = sk->sk_rcv_saddr;  in inet_bind2_bucket_init()
127 						   const struct sock *sk)  in inet_bind2_bucket_create()  argument
132 		inet_bind2_bucket_init(tb, net, head, port, l3mdev, sk);  in inet_bind2_bucket_create()
147 					 const struct sock *sk)  in inet_bind2_bucket_addr_match()  argument
150 	if (sk->sk_family != tb2->family)  in inet_bind2_bucket_addr_match()
153 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_addr_match()
155 				       &sk->sk_v6_rcv_saddr);  in inet_bind2_bucket_addr_match()
157 	return tb2->rcv_saddr == sk->sk_rcv_saddr;  in inet_bind2_bucket_addr_match()
160 void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,  in inet_bind_hash()  argument
163 	inet_sk(sk)->inet_num = port;  in inet_bind_hash()
164 	sk_add_bind_node(sk, &tb->owners);  in inet_bind_hash()
165 	inet_csk(sk)->icsk_bind_hash = tb;  in inet_bind_hash()
166 	sk_add_bind2_node(sk, &tb2->owners);  in inet_bind_hash()
167 	inet_csk(sk)->icsk_bind2_hash = tb2;  in inet_bind_hash()
173 static void __inet_put_port(struct sock *sk)  in __inet_put_port()  argument
175 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_put_port()
177 	struct net *net = sock_net(sk);  in __inet_put_port()
181 	bhash = inet_bhashfn(net, inet_sk(sk)->inet_num, hashinfo->bhash_size);  in __inet_put_port()
183 	head2 = inet_bhashfn_portaddr(hashinfo, sk, net, inet_sk(sk)->inet_num);  in __inet_put_port()
186 	tb = inet_csk(sk)->icsk_bind_hash;  in __inet_put_port()
187 	__sk_del_bind_node(sk);  in __inet_put_port()
188 	inet_csk(sk)->icsk_bind_hash = NULL;  in __inet_put_port()
189 	inet_sk(sk)->inet_num = 0;  in __inet_put_port()
193 	if (inet_csk(sk)->icsk_bind2_hash) {  in __inet_put_port()
194 		struct inet_bind2_bucket *tb2 = inet_csk(sk)->icsk_bind2_hash;  in __inet_put_port()
196 		__sk_del_bind2_node(sk);  in __inet_put_port()
197 		inet_csk(sk)->icsk_bind2_hash = NULL;  in __inet_put_port()
205 void inet_put_port(struct sock *sk)  in inet_put_port()  argument
208 	__inet_put_port(sk);  in inet_put_port()
213 int __inet_inherit_port(const struct sock *sk, struct sock *child)  in __inet_inherit_port()  argument
215 	struct inet_hashinfo *table = tcp_or_dccp_get_hashinfo(sk);  in __inet_inherit_port()
219 	struct net *net = sock_net(sk);  in __inet_inherit_port()
231 	tb = inet_csk(sk)->icsk_bind_hash;  in __inet_inherit_port()
232 	tb2 = inet_csk(sk)->icsk_bind2_hash;  in __inet_inherit_port()
239 		l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_inherit_port()
264 		l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_inherit_port()
294 inet_lhash2_bucket_sk(struct inet_hashinfo *h, struct sock *sk)  in inet_lhash2_bucket_sk()  argument
299 	if (sk->sk_family == AF_INET6)  in inet_lhash2_bucket_sk()
300 		hash = ipv6_portaddr_hash(sock_net(sk),  in inet_lhash2_bucket_sk()
301 					  &sk->sk_v6_rcv_saddr,  in inet_lhash2_bucket_sk()
302 					  inet_sk(sk)->inet_num);  in inet_lhash2_bucket_sk()
305 		hash = ipv4_portaddr_hash(sock_net(sk),  in inet_lhash2_bucket_sk()
306 					  inet_sk(sk)->inet_rcv_saddr,  in inet_lhash2_bucket_sk()
307 					  inet_sk(sk)->inet_num);  in inet_lhash2_bucket_sk()
311 static inline int compute_score(struct sock *sk, struct net *net,  in compute_score()  argument
317 	if (net_eq(sock_net(sk), net) && sk->sk_num == hnum &&  in compute_score()
318 			!ipv6_only_sock(sk)) {  in compute_score()
319 		if (sk->sk_rcv_saddr != daddr)  in compute_score()
322 		if (!inet_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif))  in compute_score()
324 		score =  sk->sk_bound_dev_if ? 2 : 1;  in compute_score()
326 		if (sk->sk_family == PF_INET)  in compute_score()
328 		if (READ_ONCE(sk->sk_incoming_cpu) == raw_smp_processor_id())  in compute_score()
334 static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,  in lookup_reuseport()  argument
342 	if (sk->sk_reuseport) {  in lookup_reuseport()
344 		reuse_sk = reuseport_select_sock(sk, phash, skb, doff);  in lookup_reuseport()
364 	struct sock *sk, *result = NULL;  in inet_lhash2_lookup()  local
368 	sk_nulls_for_each_rcu(sk, node, &ilb2->nulls_head) {  in inet_lhash2_lookup()
369 		score = compute_score(sk, net, hnum, daddr, dif, sdif);  in inet_lhash2_lookup()
371 			result = lookup_reuseport(net, sk, skb, doff,  in inet_lhash2_lookup()
376 			result = sk;  in inet_lhash2_lookup()
390 	struct sock *sk, *reuse_sk;  in inet_lookup_run_bpf()  local
397 					    daddr, hnum, dif, &sk);  in inet_lookup_run_bpf()
398 	if (no_reuseport || IS_ERR_OR_NULL(sk))  in inet_lookup_run_bpf()
399 		return sk;  in inet_lookup_run_bpf()
401 	reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);  in inet_lookup_run_bpf()
403 		sk = reuse_sk;  in inet_lookup_run_bpf()
404 	return sk;  in inet_lookup_run_bpf()
450 void sock_gen_put(struct sock *sk)  in sock_gen_put()  argument
452 	if (!refcount_dec_and_test(&sk->sk_refcnt))  in sock_gen_put()
455 	if (sk->sk_state == TCP_TIME_WAIT)  in sock_gen_put()
456 		inet_twsk_free(inet_twsk(sk));  in sock_gen_put()
457 	else if (sk->sk_state == TCP_NEW_SYN_RECV)  in sock_gen_put()
458 		reqsk_free(inet_reqsk(sk));  in sock_gen_put()
460 		sk_free(sk);  in sock_gen_put()
466 	sock_gen_put(skb->sk);  in sock_edemux()
478 	struct sock *sk;  in __inet_lookup_established()  local
488 	sk_nulls_for_each_rcu(sk, node, &head->chain) {  in __inet_lookup_established()
489 		if (sk->sk_hash != hash)  in __inet_lookup_established()
491 		if (likely(inet_match(net, sk, acookie, ports, dif, sdif))) {  in __inet_lookup_established()
492 			if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt)))  in __inet_lookup_established()
494 			if (unlikely(!inet_match(net, sk, acookie,  in __inet_lookup_established()
496 				sock_gen_put(sk);  in __inet_lookup_established()
510 	sk = NULL;  in __inet_lookup_established()
512 	return sk;  in __inet_lookup_established()
518 				    struct sock *sk, __u16 lport,  in __inet_check_established()  argument
522 	struct inet_sock *inet = inet_sk(sk);  in __inet_check_established()
525 	int dif = sk->sk_bound_dev_if;  in __inet_check_established()
526 	struct net *net = sock_net(sk);  in __inet_check_established()
547 				if (twsk_unique(sk, sk2, twp))  in __inet_check_established()
559 	sk->sk_hash = hash;  in __inet_check_established()
560 	WARN_ON(!sk_unhashed(sk));  in __inet_check_established()
561 	__sk_nulls_add_node_rcu(sk, &head->chain);  in __inet_check_established()
567 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in __inet_check_established()
582 static u64 inet_sk_port_offset(const struct sock *sk)  in inet_sk_port_offset()  argument
584 	const struct inet_sock *inet = inet_sk(sk);  in inet_sk_port_offset()
594 static bool inet_ehash_lookup_by_sk(struct sock *sk,  in inet_ehash_lookup_by_sk()  argument
597 	const __portpair ports = INET_COMBINED_PORTS(sk->sk_dport, sk->sk_num);  in inet_ehash_lookup_by_sk()
598 	const int sdif = sk->sk_bound_dev_if;  in inet_ehash_lookup_by_sk()
599 	const int dif = sk->sk_bound_dev_if;  in inet_ehash_lookup_by_sk()
601 	struct net *net = sock_net(sk);  in inet_ehash_lookup_by_sk()
604 	INET_ADDR_COOKIE(acookie, sk->sk_daddr, sk->sk_rcv_saddr);  in inet_ehash_lookup_by_sk()
607 		if (esk->sk_hash != sk->sk_hash)  in inet_ehash_lookup_by_sk()
609 		if (sk->sk_family == AF_INET) {  in inet_ehash_lookup_by_sk()
616 		else if (sk->sk_family == AF_INET6) {  in inet_ehash_lookup_by_sk()
618 						 &sk->sk_v6_daddr,  in inet_ehash_lookup_by_sk()
619 						 &sk->sk_v6_rcv_saddr,  in inet_ehash_lookup_by_sk()
634 bool inet_ehash_insert(struct sock *sk, struct sock *osk, bool *found_dup_sk)  in inet_ehash_insert()  argument
636 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_ehash_insert()
642 	WARN_ON_ONCE(!sk_unhashed(sk));  in inet_ehash_insert()
644 	sk->sk_hash = sk_ehashfn(sk);  in inet_ehash_insert()
645 	head = inet_ehash_bucket(hashinfo, sk->sk_hash);  in inet_ehash_insert()
647 	lock = inet_ehash_lockp(hashinfo, sk->sk_hash);  in inet_ehash_insert()
651 		WARN_ON_ONCE(sk->sk_hash != osk->sk_hash);  in inet_ehash_insert()
654 		*found_dup_sk = inet_ehash_lookup_by_sk(sk, list);  in inet_ehash_insert()
660 		__sk_nulls_add_node_rcu(sk, list);  in inet_ehash_insert()
667 bool inet_ehash_nolisten(struct sock *sk, struct sock *osk, bool *found_dup_sk)  in inet_ehash_nolisten()  argument
669 	bool ok = inet_ehash_insert(sk, osk, found_dup_sk);  in inet_ehash_nolisten()
672 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in inet_ehash_nolisten()
674 		this_cpu_inc(*sk->sk_prot->orphan_count);  in inet_ehash_nolisten()
675 		inet_sk_set_state(sk, TCP_CLOSE);  in inet_ehash_nolisten()
676 		sock_set_flag(sk, SOCK_DEAD);  in inet_ehash_nolisten()
677 		inet_csk_destroy_sock(sk);  in inet_ehash_nolisten()
683 static int inet_reuseport_add_sock(struct sock *sk,  in inet_reuseport_add_sock()  argument
686 	struct inet_bind_bucket *tb = inet_csk(sk)->icsk_bind_hash;  in inet_reuseport_add_sock()
689 	kuid_t uid = sock_i_uid(sk);  in inet_reuseport_add_sock()
692 		if (sk2 != sk &&  in inet_reuseport_add_sock()
693 		    sk2->sk_family == sk->sk_family &&  in inet_reuseport_add_sock()
694 		    ipv6_only_sock(sk2) == ipv6_only_sock(sk) &&  in inet_reuseport_add_sock()
695 		    sk2->sk_bound_dev_if == sk->sk_bound_dev_if &&  in inet_reuseport_add_sock()
698 		    inet_rcv_saddr_equal(sk, sk2, false))  in inet_reuseport_add_sock()
699 			return reuseport_add_sock(sk, sk2,  in inet_reuseport_add_sock()
700 						  inet_rcv_saddr_any(sk));  in inet_reuseport_add_sock()
703 	return reuseport_alloc(sk, inet_rcv_saddr_any(sk));  in inet_reuseport_add_sock()
706 int __inet_hash(struct sock *sk, struct sock *osk)  in __inet_hash()  argument
708 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_hash()
712 	if (sk->sk_state != TCP_LISTEN) {  in __inet_hash()
714 		inet_ehash_nolisten(sk, osk, NULL);  in __inet_hash()
718 	WARN_ON(!sk_unhashed(sk));  in __inet_hash()
719 	ilb2 = inet_lhash2_bucket_sk(hashinfo, sk);  in __inet_hash()
722 	if (sk->sk_reuseport) {  in __inet_hash()
723 		err = inet_reuseport_add_sock(sk, ilb2);  in __inet_hash()
727 	if (IS_ENABLED(CONFIG_IPV6) && sk->sk_reuseport &&  in __inet_hash()
728 		sk->sk_family == AF_INET6)  in __inet_hash()
729 		__sk_nulls_add_node_tail_rcu(sk, &ilb2->nulls_head);  in __inet_hash()
731 		__sk_nulls_add_node_rcu(sk, &ilb2->nulls_head);  in __inet_hash()
732 	sock_set_flag(sk, SOCK_RCU_FREE);  in __inet_hash()
733 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);  in __inet_hash()
741 int inet_hash(struct sock *sk)  in inet_hash()  argument
745 	if (sk->sk_state != TCP_CLOSE)  in inet_hash()
746 		err = __inet_hash(sk, NULL);  in inet_hash()
752 void inet_unhash(struct sock *sk)  in inet_unhash()  argument
754 	struct inet_hashinfo *hashinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_unhash()
756 	if (sk_unhashed(sk))  in inet_unhash()
759 	if (sk->sk_state == TCP_LISTEN) {  in inet_unhash()
762 		ilb2 = inet_lhash2_bucket_sk(hashinfo, sk);  in inet_unhash()
767 		if (sk_unhashed(sk)) {  in inet_unhash()
772 		if (rcu_access_pointer(sk->sk_reuseport_cb))  in inet_unhash()
773 			reuseport_stop_listen_sock(sk);  in inet_unhash()
775 		__sk_nulls_del_node_init_rcu(sk);  in inet_unhash()
776 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);  in inet_unhash()
779 		spinlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash);  in inet_unhash()
782 		if (sk_unhashed(sk)) {  in inet_unhash()
786 		__sk_nulls_del_node_init_rcu(sk);  in inet_unhash()
787 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);  in inet_unhash()
795 				    int l3mdev, const struct sock *sk)  in inet_bind2_bucket_match()  argument
798 	if (sk->sk_family != tb->family)  in inet_bind2_bucket_match()
801 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_match()
804 			ipv6_addr_equal(&tb->v6_rcv_saddr, &sk->sk_v6_rcv_saddr);  in inet_bind2_bucket_match()
808 			tb->l3mdev == l3mdev && tb->rcv_saddr == sk->sk_rcv_saddr;  in inet_bind2_bucket_match()
812 				      unsigned short port, int l3mdev, const struct sock *sk)  in inet_bind2_bucket_match_addr_any()  argument
817 	if (sk->sk_family != tb->family)  in inet_bind2_bucket_match_addr_any()
820 	if (sk->sk_family == AF_INET6)  in inet_bind2_bucket_match_addr_any()
833 		       unsigned short port, int l3mdev, const struct sock *sk)  in inet_bind2_bucket_find()  argument
838 		if (inet_bind2_bucket_match(bhash2, net, port, l3mdev, sk))  in inet_bind2_bucket_find()
845 inet_bhash2_addr_any_hashbucket(const struct sock *sk, const struct net *net, int port)  in inet_bhash2_addr_any_hashbucket()  argument
847 	struct inet_hashinfo *hinfo = tcp_or_dccp_get_hashinfo(sk);  in inet_bhash2_addr_any_hashbucket()
852 	if (sk->sk_family == AF_INET6)  in inet_bhash2_addr_any_hashbucket()
861 static void inet_update_saddr(struct sock *sk, void *saddr, int family)  in inet_update_saddr()  argument
864 		inet_sk(sk)->inet_saddr = *(__be32 *)saddr;  in inet_update_saddr()
865 		sk_rcv_saddr_set(sk, inet_sk(sk)->inet_saddr);  in inet_update_saddr()
869 		sk->sk_v6_rcv_saddr = *(struct in6_addr *)saddr;  in inet_update_saddr()
874 static int __inet_bhash2_update_saddr(struct sock *sk, void *saddr, int family, bool reset)  in __inet_bhash2_update_saddr()  argument
876 	struct inet_hashinfo *hinfo = tcp_or_dccp_get_hashinfo(sk);  in __inet_bhash2_update_saddr()
879 	int l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_bhash2_update_saddr()
880 	int port = inet_sk(sk)->inet_num;  in __inet_bhash2_update_saddr()
881 	struct net *net = sock_net(sk);  in __inet_bhash2_update_saddr()
884 	if (!inet_csk(sk)->icsk_bind2_hash) {  in __inet_bhash2_update_saddr()
887 			inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
889 			inet_update_saddr(sk, saddr, family);  in __inet_bhash2_update_saddr()
906 			inet_put_port(sk);  in __inet_bhash2_update_saddr()
907 			inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
915 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_bhash2_update_saddr()
923 	__sk_del_bind2_node(sk);  in __inet_bhash2_update_saddr()
924 	inet_bind2_bucket_destroy(hinfo->bind2_bucket_cachep, inet_csk(sk)->icsk_bind2_hash);  in __inet_bhash2_update_saddr()
928 		inet_reset_saddr(sk);  in __inet_bhash2_update_saddr()
930 		inet_update_saddr(sk, saddr, family);  in __inet_bhash2_update_saddr()
932 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_bhash2_update_saddr()
935 	tb2 = inet_bind2_bucket_find(head2, net, port, l3mdev, sk);  in __inet_bhash2_update_saddr()
938 		inet_bind2_bucket_init(tb2, net, head2, port, l3mdev, sk);  in __inet_bhash2_update_saddr()
940 	sk_add_bind2_node(sk, &tb2->owners);  in __inet_bhash2_update_saddr()
941 	inet_csk(sk)->icsk_bind2_hash = tb2;  in __inet_bhash2_update_saddr()
952 int inet_bhash2_update_saddr(struct sock *sk, void *saddr, int family)  in inet_bhash2_update_saddr()  argument
954 	return __inet_bhash2_update_saddr(sk, saddr, family, false);  in inet_bhash2_update_saddr()
958 void inet_bhash2_reset_saddr(struct sock *sk)  in inet_bhash2_reset_saddr()  argument
960 	if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK))  in inet_bhash2_reset_saddr()
961 		__inet_bhash2_update_saddr(sk, NULL, 0, true);  in inet_bhash2_reset_saddr()
979 		struct sock *sk, u64 port_offset,  in __inet_hash_connect()  argument
986 	int port = inet_sk(sk)->inet_num;  in __inet_hash_connect()
987 	struct net *net = sock_net(sk);  in __inet_hash_connect()
999 		tb = inet_csk(sk)->icsk_bind_hash;  in __inet_hash_connect()
1001 		if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {  in __inet_hash_connect()
1002 			inet_ehash_nolisten(sk, NULL, NULL);  in __inet_hash_connect()
1008 		ret = check_established(death_row, sk, port, NULL);  in __inet_hash_connect()
1013 	l3mdev = inet_sk_bound_l3mdev(sk);  in __inet_hash_connect()
1052 				if (!check_established(death_row, sk,  in __inet_hash_connect()
1084 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);  in __inet_hash_connect()
1087 	tb2 = inet_bind2_bucket_find(head2, net, port, l3mdev, sk);  in __inet_hash_connect()
1090 					       head2, port, l3mdev, sk);  in __inet_hash_connect()
1104 	inet_bind_hash(sk, tb, tb2, port);  in __inet_hash_connect()
1108 	if (sk_unhashed(sk)) {  in __inet_hash_connect()
1109 		inet_sk(sk)->inet_sport = htons(port);  in __inet_hash_connect()
1110 		inet_ehash_nolisten(sk, (struct sock *)tw, NULL);  in __inet_hash_connect()
1132 		      struct sock *sk)  in inet_hash_connect()  argument
1136 	if (!inet_sk(sk)->inet_num)  in inet_hash_connect()
1137 		port_offset = inet_sk_port_offset(sk);  in inet_hash_connect()
1138 	return __inet_hash_connect(death_row, sk, port_offset,  in inet_hash_connect()