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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/include/net/ip.h
....@@ -1,3 +1,4 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  * INET		An implementation of the TCP/IP protocol suite for the LINUX
34  *		operating system.  INET is implemented using the  BSD Socket
....@@ -13,11 +14,6 @@
1314  *
1415  * Changes:
1516  *		Mike McLagan    :       Routing by source
16
- *
17
- *		This program is free software; you can redistribute it and/or
18
- *		modify it under the terms of the GNU General Public License
19
- *		as published by the Free Software Foundation; either version
20
- *		2 of the License, or (at your option) any later version.
2117  */
2218 #ifndef _IP_H
2319 #define _IP_H
....@@ -27,6 +23,7 @@
2723 #include <linux/in.h>
2824 #include <linux/skbuff.h>
2925 #include <linux/jhash.h>
26
+#include <linux/sockptr.h>
3027 
3128 #include <net/inet_sock.h>
3229 #include <net/route.h>
....@@ -40,6 +37,10 @@
4037 
4138 #define IPV4_MAX_PMTU		65535U		/* RFC 2675, Section 5.1 */
4239 #define IPV4_MIN_MTU		68			/* RFC 791 */
40
+
41
+extern unsigned int sysctl_fib_sync_mem;
42
+extern unsigned int sysctl_fib_sync_mem_min;
43
+extern unsigned int sysctl_fib_sync_mem_max;
4344 
4445 struct sock;
4546 
....@@ -91,6 +92,7 @@
9192 {
9293 	ipcm_init(ipcm);
9394 
95
+	ipcm->sockc.mark = inet->sk.sk_mark;
9496 	ipcm->sockc.tsflags = inet->sk.sk_tsflags;
9597 	ipcm->oif = inet->sk.sk_bound_dev_if;
9698 	ipcm->addr = inet->inet_saddr;
....@@ -152,17 +154,56 @@
152154 
153155 int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
154156 			  __be32 saddr, __be32 daddr,
155
-			  struct ip_options_rcu *opt);
157
+			  struct ip_options_rcu *opt, u8 tos);
156158 int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
157159 	   struct net_device *orig_dev);
158160 void ip_list_rcv(struct list_head *head, struct packet_type *pt,
159161 		 struct net_device *orig_dev);
160162 int ip_local_deliver(struct sk_buff *skb);
163
+void ip_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int proto);
161164 int ip_mr_input(struct sk_buff *skb);
162165 int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb);
163166 int ip_mc_output(struct net *net, struct sock *sk, struct sk_buff *skb);
164167 int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
165168 		   int (*output)(struct net *, struct sock *, struct sk_buff *));
169
+
170
+struct ip_fraglist_iter {
171
+	struct sk_buff	*frag;
172
+	struct iphdr	*iph;
173
+	int		offset;
174
+	unsigned int	hlen;
175
+};
176
+
177
+void ip_fraglist_init(struct sk_buff *skb, struct iphdr *iph,
178
+		      unsigned int hlen, struct ip_fraglist_iter *iter);
179
+void ip_fraglist_prepare(struct sk_buff *skb, struct ip_fraglist_iter *iter);
180
+
181
+static inline struct sk_buff *ip_fraglist_next(struct ip_fraglist_iter *iter)
182
+{
183
+	struct sk_buff *skb = iter->frag;
184
+
185
+	iter->frag = skb->next;
186
+	skb_mark_not_on_list(skb);
187
+
188
+	return skb;
189
+}
190
+
191
+struct ip_frag_state {
192
+	bool		DF;
193
+	unsigned int	hlen;
194
+	unsigned int	ll_rs;
195
+	unsigned int	mtu;
196
+	unsigned int	left;
197
+	int		offset;
198
+	int		ptr;
199
+	__be16		not_last_frag;
200
+};
201
+
202
+void ip_frag_init(struct sk_buff *skb, unsigned int hlen, unsigned int ll_rs,
203
+		  unsigned int mtu, bool DF, struct ip_frag_state *state);
204
+struct sk_buff *ip_frag_next(struct sk_buff *skb,
205
+			     struct ip_frag_state *state);
206
+
166207 void ip_send_check(struct iphdr *ip);
167208 int __ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
168209 int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
....@@ -194,11 +235,7 @@
194235 			    struct ipcm_cookie *ipc, struct rtable **rtp,
195236 			    struct inet_cork *cork, unsigned int flags);
196237 
197
-static inline int ip_queue_xmit(struct sock *sk, struct sk_buff *skb,
198
-				struct flowi *fl)
199
-{
200
-	return __ip_queue_xmit(sk, skb, fl, inet_sk(sk)->tos);
201
-}
238
+int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
202239 
203240 static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
204241 {
....@@ -243,7 +280,7 @@
243280 			   const struct ip_options *sopt,
244281 			   __be32 daddr, __be32 saddr,
245282 			   const struct ip_reply_arg *arg,
246
-			   unsigned int len);
283
+			   unsigned int len, u64 transmit_time);
247284 
248285 #define IP_INC_STATS(net, field)	SNMP_INC_STATS64((net)->mib.ip_statistics, field)
249286 #define __IP_INC_STATS(net, field)	__SNMP_INC_STATS64((net)->mib.ip_statistics, field)
....@@ -302,11 +339,18 @@
302339 void inet_get_local_port_range(struct net *net, int *low, int *high);
303340 
304341 #ifdef CONFIG_SYSCTL
305
-static inline int inet_is_local_reserved_port(struct net *net, int port)
342
+static inline bool inet_is_local_reserved_port(struct net *net, unsigned short port)
306343 {
307344 	if (!net->ipv4.sysctl_local_reserved_ports)
308
-		return 0;
345
+		return false;
309346 	return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
347
+}
348
+
349
+static inline bool inet_is_local_unbindable_port(struct net *net, unsigned short port)
350
+{
351
+	if (!net->ipv4.sysctl_local_unbindable_ports)
352
+		return false;
353
+	return test_bit(port, net->ipv4.sysctl_local_unbindable_ports);
310354 }
311355 
312356 static inline bool sysctl_dev_name_is_allowed(const char *name)
....@@ -314,20 +358,25 @@
314358 	return strcmp(name, "default") != 0  && strcmp(name, "all") != 0;
315359 }
316360 
317
-static inline int inet_prot_sock(struct net *net)
361
+static inline bool inet_port_requires_bind_service(struct net *net, unsigned short port)
318362 {
319
-	return net->ipv4.sysctl_ip_prot_sock;
363
+	return port < READ_ONCE(net->ipv4.sysctl_ip_prot_sock);
320364 }
321365 
322366 #else
323
-static inline int inet_is_local_reserved_port(struct net *net, int port)
367
+static inline bool inet_is_local_reserved_port(struct net *net, unsigned short port)
324368 {
325
-	return 0;
369
+	return false;
326370 }
327371 
328
-static inline int inet_prot_sock(struct net *net)
372
+static inline bool inet_is_local_unbindable_port(struct net *net, unsigned short port)
329373 {
330
-	return PROT_SOCK;
374
+	return false;
375
+}
376
+
377
+static inline bool inet_port_requires_bind_service(struct net *net, unsigned short port)
378
+{
379
+	return port < PROT_SOCK;
331380 }
332381 #endif
333382 
....@@ -343,7 +392,7 @@
343392 void ip_static_sysctl_init(void);
344393 
345394 #define IP4_REPLY_MARK(net, mark) \
346
-	((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
395
+	(READ_ONCE((net)->ipv4.sysctl_fwmark_reflect) ? (mark) : 0)
347396 
348397 static inline bool ip_is_fragment(const struct iphdr *iph)
349398 {
....@@ -404,7 +453,7 @@
404453 	struct net *net = dev_net(dst->dev);
405454 	unsigned int mtu;
406455 
407
-	if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
456
+	if (READ_ONCE(net->ipv4.sysctl_ip_fwd_use_pmtu) ||
408457 	    ip_mtu_locked(dst) ||
409458 	    !forwarding)
410459 		return dst_mtu(dst);
....@@ -432,8 +481,36 @@
432481 	return mtu - lwtunnel_headroom(skb_dst(skb)->lwtstate, mtu);
433482 }
434483 
435
-int ip_metrics_convert(struct net *net, struct nlattr *fc_mx, int fc_mx_len,
436
-		       u32 *metrics);
484
+struct dst_metrics *ip_fib_metrics_init(struct net *net, struct nlattr *fc_mx,
485
+					int fc_mx_len,
486
+					struct netlink_ext_ack *extack);
487
+static inline void ip_fib_metrics_put(struct dst_metrics *fib_metrics)
488
+{
489
+	if (fib_metrics != &dst_default_metrics &&
490
+	    refcount_dec_and_test(&fib_metrics->refcnt))
491
+		kfree(fib_metrics);
492
+}
493
+
494
+/* ipv4 and ipv6 both use refcounted metrics if it is not the default */
495
+static inline
496
+void ip_dst_init_metrics(struct dst_entry *dst, struct dst_metrics *fib_metrics)
497
+{
498
+	dst_init_metrics(dst, fib_metrics->metrics, true);
499
+
500
+	if (fib_metrics != &dst_default_metrics) {
501
+		dst->_metrics |= DST_METRICS_REFCOUNTED;
502
+		refcount_inc(&fib_metrics->refcnt);
503
+	}
504
+}
505
+
506
+static inline
507
+void ip_dst_metrics_put(struct dst_entry *dst)
508
+{
509
+	struct dst_metrics *p = (struct dst_metrics *)DST_METRICS_PTR(dst);
510
+
511
+	if (p != &dst_default_metrics && refcount_dec_and_test(&p->refcnt))
512
+		kfree(p);
513
+}
437514 
438515 u32 ip_idents_reserve(u32 hash, int segs);
439516 void __ip_select_ident(struct net *net, struct iphdr *iph, int segs);
....@@ -481,7 +558,7 @@
481558 	BUILD_BUG_ON(offsetof(typeof(flow->addrs), v4addrs.dst) !=
482559 		     offsetof(typeof(flow->addrs), v4addrs.src) +
483560 			      sizeof(flow->addrs.v4addrs.src));
484
-	memcpy(&flow->addrs.v4addrs, &iph->saddr, sizeof(flow->addrs.v4addrs));
561
+	memcpy(&flow->addrs.v4addrs, &iph->addrs, sizeof(flow->addrs.v4addrs));
485562 	flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
486563 }
487564 
....@@ -654,9 +731,7 @@
654731 int ip_options_compile(struct net *net, struct ip_options *opt,
655732 		       struct sk_buff *skb);
656733 int ip_options_get(struct net *net, struct ip_options_rcu **optp,
657
-		   unsigned char *data, int optlen);
658
-int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
659
-			     unsigned char __user *data, int optlen);
734
+		   sockptr_t data, int optlen);
660735 void ip_options_undo(struct ip_options *opt);
661736 void ip_forward_options(struct sk_buff *skb);
662737 int ip_options_rcv_srr(struct sk_buff *skb, struct net_device *dev);
....@@ -670,14 +745,10 @@
670745 			 struct sk_buff *skb, int tlen, int offset);
671746 int ip_cmsg_send(struct sock *sk, struct msghdr *msg,
672747 		 struct ipcm_cookie *ipc, bool allow_ipv6);
673
-int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
748
+int ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
674749 		  unsigned int optlen);
675750 int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
676751 		  int __user *optlen);
677
-int compat_ip_setsockopt(struct sock *sk, int level, int optname,
678
-			 char __user *optval, unsigned int optlen);
679
-int compat_ip_getsockopt(struct sock *sk, int level, int optname,
680
-			 char __user *optval, int __user *optlen);
681752 int ip_ra_control(struct sock *sk, unsigned char on,
682753 		  void (*destructor)(struct sock *));
683754 
....@@ -708,4 +779,10 @@
708779 	return likely(mtu >= IPV4_MIN_MTU);
709780 }
710781 
782
+void ip_sock_set_freebind(struct sock *sk);
783
+int ip_sock_set_mtu_discover(struct sock *sk, int val);
784
+void ip_sock_set_pktinfo(struct sock *sk);
785
+void ip_sock_set_recverr(struct sock *sk);
786
+void ip_sock_set_tos(struct sock *sk, int val);
787
+
711788 #endif	/* _IP_H */