forked from ~ljy/RK356X_SDK_RELEASE
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hc
2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/net/ipv6/af_inet6.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *	PF_INET6 socket protocol family
34  *	Linux INET6 implementation
....@@ -11,11 +12,6 @@
1112  *	piggy, Karl Knutson	:	Socket protocol table
1213  *	Hideaki YOSHIFUJI	:	sin6_scope_id support
1314  *	Arnaldo Melo		:	check proc_net_create return, cleanups
14
- *
15
- *	This program is free software; you can redistribute it and/or
16
- *	modify it under the terms of the GNU General Public License
17
- *	as published by the Free Software Foundation; either version
18
- *	2 of the License, or (at your option) any later version.
1915  */
2016 
2117 #define pr_fmt(fmt) "IPv6: " fmt
....@@ -56,12 +52,16 @@
5652 #include <net/transp_v6.h>
5753 #include <net/ip6_route.h>
5854 #include <net/addrconf.h>
55
+#include <net/ipv6_stubs.h>
5956 #include <net/ndisc.h>
6057 #ifdef CONFIG_IPV6_TUNNEL
6158 #include <net/ip6_tunnel.h>
6259 #endif
6360 #include <net/calipso.h>
6461 #include <net/seg6.h>
62
+#include <net/rpl.h>
63
+#include <net/compat.h>
64
+#include <net/xfrm.h>
6565 
6666 #include <linux/uaccess.h>
6767 #include <linux/mroute6.h>
....@@ -106,6 +106,13 @@
106106 
107107 	return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
108108 }
109
+
110
+void inet6_sock_destruct(struct sock *sk)
111
+{
112
+	inet6_cleanup_sock(sk);
113
+	inet_sock_destruct(sk);
114
+}
115
+EXPORT_SYMBOL_GPL(inet6_sock_destruct);
109116 
110117 static int inet6_create(struct net *net, struct socket *sock, int protocol,
111118 			int kern)
....@@ -199,7 +206,7 @@
199206 			inet->hdrincl = 1;
200207 	}
201208 
202
-	sk->sk_destruct		= inet_sock_destruct;
209
+	sk->sk_destruct		= inet6_sock_destruct;
203210 	sk->sk_family		= PF_INET6;
204211 	sk->sk_protocol		= protocol;
205212 
....@@ -209,8 +216,9 @@
209216 	np->hop_limit	= -1;
210217 	np->mcast_hops	= IPV6_DEFAULT_MCASTHOPS;
211218 	np->mc_loop	= 1;
219
+	np->mc_all	= 1;
212220 	np->pmtudisc	= IPV6_PMTUDISC_WANT;
213
-	np->repflow	= net->ipv6.sysctl.flowlabel_reflect;
221
+	np->repflow	= net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
214222 	sk->sk_ipv6only	= net->ipv6.sysctl.bindv6only;
215223 
216224 	/* Init the ipv4 part of the socket since we can have sockets
....@@ -224,7 +232,7 @@
224232 	inet->mc_list	= NULL;
225233 	inet->rcv_tos	= 0;
226234 
227
-	if (net->ipv4.sysctl_ip_no_pmtu_disc)
235
+	if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
228236 		inet->pmtudisc = IP_PMTUDISC_DONT;
229237 	else
230238 		inet->pmtudisc = IP_PMTUDISC_WANT;
....@@ -274,7 +282,7 @@
274282 }
275283 
276284 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
277
-			bool force_bind_address_no_port, bool with_lock)
285
+			u32 flags)
278286 {
279287 	struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
280288 	struct inet_sock *inet = inet_sk(sk);
....@@ -294,11 +302,13 @@
294302 		return -EINVAL;
295303 
296304 	snum = ntohs(addr->sin6_port);
297
-	if (snum && snum < inet_prot_sock(net) &&
305
+	if (snum && inet_is_local_unbindable_port(net, snum))
306
+		return -EPERM;
307
+	if (snum && inet_port_requires_bind_service(net, snum) &&
298308 	    !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
299309 		return -EACCES;
300310 
301
-	if (with_lock)
311
+	if (flags & BIND_WITH_LOCK)
302312 		lock_sock(sk);
303313 
304314 	/* Check these errors (active socket, double bind). */
....@@ -401,18 +411,20 @@
401411 
402412 	/* Make sure we are allowed to bind here. */
403413 	if (snum || !(inet->bind_address_no_port ||
404
-		      force_bind_address_no_port)) {
414
+		      (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
405415 		if (sk->sk_prot->get_port(sk, snum)) {
406416 			sk->sk_ipv6only = saved_ipv6only;
407417 			inet_reset_saddr(sk);
408418 			err = -EADDRINUSE;
409419 			goto out;
410420 		}
411
-		err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
412
-		if (err) {
413
-			sk->sk_ipv6only = saved_ipv6only;
414
-			inet_reset_saddr(sk);
415
-			goto out;
421
+		if (!(flags & BIND_FROM_BPF)) {
422
+			err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
423
+			if (err) {
424
+				sk->sk_ipv6only = saved_ipv6only;
425
+				inet_reset_saddr(sk);
426
+				goto out;
427
+			}
416428 		}
417429 	}
418430 
....@@ -424,7 +436,7 @@
424436 	inet->inet_dport = 0;
425437 	inet->inet_daddr = 0;
426438 out:
427
-	if (with_lock)
439
+	if (flags & BIND_WITH_LOCK)
428440 		release_sock(sk);
429441 	return err;
430442 out_unlock:
....@@ -452,7 +464,7 @@
452464 	if (err)
453465 		return err;
454466 
455
-	return __inet6_bind(sk, uaddr, addr_len, false, true);
467
+	return __inet6_bind(sk, uaddr, addr_len, BIND_WITH_LOCK);
456468 }
457469 EXPORT_SYMBOL(inet6_bind);
458470 
....@@ -482,12 +494,10 @@
482494 	/* Release rx options */
483495 
484496 	skb = xchg(&np->pktoptions, NULL);
485
-	if (skb)
486
-		kfree_skb(skb);
497
+	kfree_skb(skb);
487498 
488499 	skb = xchg(&np->rxpmtu, NULL);
489
-	if (skb)
490
-		kfree_skb(skb);
500
+	kfree_skb(skb);
491501 
492502 	/* Free flowlabels */
493503 	fl6_free_socklist(sk);
....@@ -502,12 +512,17 @@
502512 }
503513 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
504514 
515
+void inet6_cleanup_sock(struct sock *sk)
516
+{
517
+	inet6_destroy_sock(sk);
518
+}
519
+EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
520
+
505521 /*
506522  *	This does both peername and sockname.
507523  */
508
-
509524 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
510
-		 int peer)
525
+		  int peer)
511526 {
512527 	struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
513528 	struct sock *sk = sock->sk;
....@@ -532,9 +547,13 @@
532547 			sin->sin6_addr = np->saddr;
533548 		else
534549 			sin->sin6_addr = sk->sk_v6_rcv_saddr;
535
-
536550 		sin->sin6_port = inet->inet_sport;
537551 	}
552
+	if (cgroup_bpf_enabled)
553
+		BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
554
+					    peer ? BPF_CGROUP_INET6_GETPEERNAME :
555
+						   BPF_CGROUP_INET6_GETSOCKNAME,
556
+					    NULL);
538557 	sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
539558 						 sk->sk_bound_dev_if);
540559 	return sizeof(*sin);
....@@ -543,27 +562,25 @@
543562 
544563 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
545564 {
565
+	void __user *argp = (void __user *)arg;
546566 	struct sock *sk = sock->sk;
547567 	struct net *net = sock_net(sk);
548568 
549569 	switch (cmd) {
550
-	case SIOCGSTAMP:
551
-		return sock_get_timestamp(sk, (struct timeval __user *)arg);
552
-
553
-	case SIOCGSTAMPNS:
554
-		return sock_get_timestampns(sk, (struct timespec __user *)arg);
555
-
556570 	case SIOCADDRT:
557
-	case SIOCDELRT:
571
+	case SIOCDELRT: {
572
+		struct in6_rtmsg rtmsg;
558573 
559
-		return ipv6_route_ioctl(net, cmd, (void __user *)arg);
560
-
574
+		if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
575
+			return -EFAULT;
576
+		return ipv6_route_ioctl(net, cmd, &rtmsg);
577
+	}
561578 	case SIOCSIFADDR:
562
-		return addrconf_add_ifaddr(net, (void __user *) arg);
579
+		return addrconf_add_ifaddr(net, argp);
563580 	case SIOCDIFADDR:
564
-		return addrconf_del_ifaddr(net, (void __user *) arg);
581
+		return addrconf_del_ifaddr(net, argp);
565582 	case SIOCSIFDSTADDR:
566
-		return addrconf_set_dstaddr(net, (void __user *) arg);
583
+		return addrconf_set_dstaddr(net, argp);
567584 	default:
568585 		if (!sk->sk_prot->ioctl)
569586 			return -ENOIOCTLCMD;
....@@ -573,6 +590,89 @@
573590 	return 0;
574591 }
575592 EXPORT_SYMBOL(inet6_ioctl);
593
+
594
+#ifdef CONFIG_COMPAT
595
+struct compat_in6_rtmsg {
596
+	struct in6_addr		rtmsg_dst;
597
+	struct in6_addr		rtmsg_src;
598
+	struct in6_addr		rtmsg_gateway;
599
+	u32			rtmsg_type;
600
+	u16			rtmsg_dst_len;
601
+	u16			rtmsg_src_len;
602
+	u32			rtmsg_metric;
603
+	u32			rtmsg_info;
604
+	u32			rtmsg_flags;
605
+	s32			rtmsg_ifindex;
606
+};
607
+
608
+static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
609
+		struct compat_in6_rtmsg __user *ur)
610
+{
611
+	struct in6_rtmsg rt;
612
+
613
+	if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
614
+			3 * sizeof(struct in6_addr)) ||
615
+	    get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
616
+	    get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
617
+	    get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
618
+	    get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
619
+	    get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
620
+	    get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
621
+	    get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
622
+		return -EFAULT;
623
+
624
+
625
+	return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
626
+}
627
+
628
+int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
629
+{
630
+	void __user *argp = compat_ptr(arg);
631
+	struct sock *sk = sock->sk;
632
+
633
+	switch (cmd) {
634
+	case SIOCADDRT:
635
+	case SIOCDELRT:
636
+		return inet6_compat_routing_ioctl(sk, cmd, argp);
637
+	default:
638
+		return -ENOIOCTLCMD;
639
+	}
640
+}
641
+EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
642
+#endif /* CONFIG_COMPAT */
643
+
644
+INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
645
+					    size_t));
646
+int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
647
+{
648
+	struct sock *sk = sock->sk;
649
+
650
+	if (unlikely(inet_send_prepare(sk)))
651
+		return -EAGAIN;
652
+
653
+	return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
654
+			       sk, msg, size);
655
+}
656
+
657
+INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
658
+					    size_t, int, int, int *));
659
+int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
660
+		  int flags)
661
+{
662
+	struct sock *sk = sock->sk;
663
+	int addr_len = 0;
664
+	int err;
665
+
666
+	if (likely(!(flags & MSG_ERRQUEUE)))
667
+		sock_rps_record_flow(sk);
668
+
669
+	err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
670
+			      sk, msg, size, flags & MSG_DONTWAIT,
671
+			      flags & ~MSG_DONTWAIT, &addr_len);
672
+	if (err >= 0)
673
+		msg->msg_namelen = addr_len;
674
+	return err;
675
+}
576676 
577677 const struct proto_ops inet6_stream_ops = {
578678 	.family		   = PF_INET6,
....@@ -585,12 +685,13 @@
585685 	.getname	   = inet6_getname,
586686 	.poll		   = tcp_poll,			/* ok		*/
587687 	.ioctl		   = inet6_ioctl,		/* must change  */
688
+	.gettstamp	   = sock_gettstamp,
588689 	.listen		   = inet_listen,		/* ok		*/
589690 	.shutdown	   = inet_shutdown,		/* ok		*/
590691 	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
591692 	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
592
-	.sendmsg	   = inet_sendmsg,		/* ok		*/
593
-	.recvmsg	   = inet_recvmsg,		/* ok		*/
693
+	.sendmsg	   = inet6_sendmsg,		/* retpoline's sake */
694
+	.recvmsg	   = inet6_recvmsg,		/* retpoline's sake */
594695 #ifdef CONFIG_MMU
595696 	.mmap		   = tcp_mmap,
596697 #endif
....@@ -601,8 +702,7 @@
601702 	.read_sock	   = tcp_read_sock,
602703 	.peek_len	   = tcp_peek_len,
603704 #ifdef CONFIG_COMPAT
604
-	.compat_setsockopt = compat_sock_common_setsockopt,
605
-	.compat_getsockopt = compat_sock_common_getsockopt,
705
+	.compat_ioctl	   = inet6_compat_ioctl,
606706 #endif
607707 	.set_rcvlowat	   = tcp_set_rcvlowat,
608708 };
....@@ -618,18 +718,18 @@
618718 	.getname	   = inet6_getname,
619719 	.poll		   = udp_poll,			/* ok		*/
620720 	.ioctl		   = inet6_ioctl,		/* must change  */
721
+	.gettstamp	   = sock_gettstamp,
621722 	.listen		   = sock_no_listen,		/* ok		*/
622723 	.shutdown	   = inet_shutdown,		/* ok		*/
623724 	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
624725 	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
625
-	.sendmsg	   = inet_sendmsg,		/* ok		*/
626
-	.recvmsg	   = inet_recvmsg,		/* ok		*/
726
+	.sendmsg	   = inet6_sendmsg,		/* retpoline's sake */
727
+	.recvmsg	   = inet6_recvmsg,		/* retpoline's sake */
627728 	.mmap		   = sock_no_mmap,
628729 	.sendpage	   = sock_no_sendpage,
629730 	.set_peek_off	   = sk_set_peek_off,
630731 #ifdef CONFIG_COMPAT
631
-	.compat_setsockopt = compat_sock_common_setsockopt,
632
-	.compat_getsockopt = compat_sock_common_getsockopt,
732
+	.compat_ioctl	   = inet6_compat_ioctl,
633733 #endif
634734 };
635735 
....@@ -733,7 +833,7 @@
733833 		fl6.fl6_dport = inet->inet_dport;
734834 		fl6.fl6_sport = inet->inet_sport;
735835 		fl6.flowi6_uid = sk->sk_uid;
736
-		security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
836
+		security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
737837 
738838 		rcu_read_lock();
739839 		final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
....@@ -848,6 +948,17 @@
848948 	net->ipv6.sysctl.bindv6only = 0;
849949 	net->ipv6.sysctl.icmpv6_time = 1*HZ;
850950 	net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
951
+	net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
952
+	net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
953
+
954
+	/* By default, rate limit error messages.
955
+	 * Except for pmtu discovery, it would break it.
956
+	 * proc_do_large_bitmap needs pointer to the bitmap.
957
+	 */
958
+	bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
959
+	bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
960
+	net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
961
+
851962 	net->ipv6.sysctl.flowlabel_consistency = 1;
852963 	net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
853964 	net->ipv6.sysctl.idgen_retries = 3;
....@@ -901,22 +1012,41 @@
9011012 	.exit = inet6_net_exit,
9021013 };
9031014 
1015
+static int ipv6_route_input(struct sk_buff *skb)
1016
+{
1017
+	ip6_route_input(skb);
1018
+	return skb_dst(skb)->error;
1019
+}
1020
+
9041021 static const struct ipv6_stub ipv6_stub_impl = {
9051022 	.ipv6_sock_mc_join = ipv6_sock_mc_join,
9061023 	.ipv6_sock_mc_drop = ipv6_sock_mc_drop,
9071024 	.ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1025
+	.ipv6_route_input  = ipv6_route_input,
9081026 	.fib6_get_table	   = fib6_get_table,
9091027 	.fib6_table_lookup = fib6_table_lookup,
9101028 	.fib6_lookup       = fib6_lookup,
911
-	.fib6_multipath_select = fib6_multipath_select,
1029
+	.fib6_select_path  = fib6_select_path,
9121030 	.ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1031
+	.fib6_nh_init	   = fib6_nh_init,
1032
+	.fib6_nh_release   = fib6_nh_release,
1033
+	.fib6_update_sernum = fib6_update_sernum_stub,
1034
+	.fib6_rt_update	   = fib6_rt_update,
1035
+	.ip6_del_rt	   = ip6_del_rt,
9131036 	.udpv6_encap_enable = udpv6_encap_enable,
9141037 	.ndisc_send_na = ndisc_send_na,
1038
+#if IS_ENABLED(CONFIG_XFRM)
1039
+	.xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1040
+	.xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1041
+	.xfrm6_rcv_encap = xfrm6_rcv_encap,
1042
+#endif
9151043 	.nd_tbl	= &nd_tbl,
1044
+	.ipv6_fragment = ip6_fragment,
9161045 };
9171046 
9181047 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
9191048 	.inet6_bind = __inet6_bind,
1049
+	.udp6_lib_lookup = __udp6_lib_lookup,
9201050 };
9211051 
9221052 static int __init inet6_init(void)
....@@ -1016,6 +1146,9 @@
10161146 	err = ip6_flowlabel_init();
10171147 	if (err)
10181148 		goto ip6_flowlabel_fail;
1149
+	err = ipv6_anycast_init();
1150
+	if (err)
1151
+		goto ipv6_anycast_fail;
10191152 	err = addrconf_init();
10201153 	if (err)
10211154 		goto addrconf_fail;
....@@ -1062,6 +1195,10 @@
10621195 	if (err)
10631196 		goto seg6_fail;
10641197 
1198
+	err = rpl_init();
1199
+	if (err)
1200
+		goto rpl_fail;
1201
+
10651202 	err = igmp6_late_init();
10661203 	if (err)
10671204 		goto igmp6_late_err;
....@@ -1084,6 +1221,8 @@
10841221 	igmp6_late_cleanup();
10851222 #endif
10861223 igmp6_late_err:
1224
+	rpl_exit();
1225
+rpl_fail:
10871226 	seg6_exit();
10881227 seg6_fail:
10891228 	calipso_exit();
....@@ -1106,6 +1245,8 @@
11061245 ipv6_exthdrs_fail:
11071246 	addrconf_cleanup();
11081247 addrconf_fail:
1248
+	ipv6_anycast_cleanup();
1249
+ipv6_anycast_fail:
11091250 	ip6_flowlabel_cleanup();
11101251 ip6_flowlabel_fail:
11111252 	ndisc_late_cleanup();