kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/include/net/ip6_route.h
..
..
@@ -16,7 +16,7 @@
16
16
 				reserved_h:3;
17
17
 #endif
18
18
 	__be32			lifetime;
19
-	__u8			prefix[0];	/* 0,8 or 16 */
19
+	__u8			prefix[];	/* 0,8 or 16 */
20
20
 };
21
21
 
22
22
 #include <net/addrconf.h>
..
..
@@ -27,6 +27,7 @@
27
27
 #include <linux/ip.h>
28
28
 #include <linux/ipv6.h>
29
29
 #include <linux/route.h>
30
+#include <net/nexthop.h>
30
31
 
31
32
 #define RT6_LOOKUP_F_IFACE		0x00000001
32
33
 #define RT6_LOOKUP_F_REACHABLE		0x00000002
..
..
@@ -35,6 +36,7 @@
35
36
 #define RT6_LOOKUP_F_SRCPREF_PUBLIC	0x00000010
36
37
 #define RT6_LOOKUP_F_SRCPREF_COA	0x00000020
37
38
 #define RT6_LOOKUP_F_IGNORE_LINKSTATE	0x00000040
39
+#define RT6_LOOKUP_F_DST_NOREF		0x00000080
38
40
 
39
41
 /* We do not (yet ?) support IPv6 jumbograms (RFC 2675)
40
42
  * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header
..
..
@@ -66,10 +68,14 @@
66
68
 		(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
67
69
 }
68
70
 
71
+/* fib entries using a nexthop object can not be coalesced into
72
+ * a multipath route
73
+ */
69
74
 static inline bool rt6_qualify_for_ecmp(const struct fib6_info *f6i)
70
75
 {
71
-	return (f6i->fib6_flags & (RTF_GATEWAY|RTF_ADDRCONF|RTF_DYNAMIC)) ==
72
-	       RTF_GATEWAY;
76
+	/* the RTF_ADDRCONF flag filters out RA's */
77
+	return !(f6i->fib6_flags & RTF_ADDRCONF) && !f6i->nh &&
78
+		f6i->fib6_nh->fib_nh_gw_family;
73
79
 }
74
80
 
75
81
 void ip6_route_input(struct sk_buff *skb);
..
..
@@ -77,6 +83,10 @@
77
83
 					 struct net_device *dev,
78
84
 					 struct flowi6 *fl6,
79
85
 					 const struct sk_buff *skb, int flags);
86
+
87
+struct dst_entry *ip6_route_output_flags_noref(struct net *net,
88
+					       const struct sock *sk,
89
+					       struct flowi6 *fl6, int flags);
80
90
 
81
91
 struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk,
82
92
 					 struct flowi6 *fl6, int flags);
..
..
@@ -86,6 +96,16 @@
86
96
 						 struct flowi6 *fl6)
87
97
 {
88
98
 	return ip6_route_output_flags(net, sk, fl6, 0);
99
+}
100
+
101
+/* Only conditionally release dst if flags indicates
102
+ * !RT6_LOOKUP_F_DST_NOREF or dst is in uncached_list.
103
+ */
104
+static inline void ip6_rt_put_flags(struct rt6_info *rt, int flags)
105
+{
106
+	if (!(flags & RT6_LOOKUP_F_DST_NOREF) ||
107
+	    !list_empty(&rt->rt6i_uncached))
108
+		ip6_rt_put(rt);
89
109
 }
90
110
 
91
111
 struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
..
..
@@ -98,12 +118,13 @@
98
118
 int ip6_route_init(void);
99
119
 void ip6_route_cleanup(void);
100
120
 
101
-int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
121
+int ipv6_route_ioctl(struct net *net, unsigned int cmd,
122
+		struct in6_rtmsg *rtmsg);
102
123
 
103
124
 int ip6_route_add(struct fib6_config *cfg, gfp_t gfp_flags,
104
125
 		  struct netlink_ext_ack *extack);
105
126
 int ip6_ins_rt(struct net *net, struct fib6_info *f6i);
106
-int ip6_del_rt(struct net *net, struct fib6_info *f6i);
127
+int ip6_del_rt(struct net *net, struct fib6_info *f6i, bool skip_notify);
107
128
 
108
129
 void rt6_flush_exceptions(struct fib6_info *f6i);
109
130
 void rt6_age_exceptions(struct fib6_info *f6i, struct fib6_gc_args *gc_args,
..
..
@@ -165,8 +186,7 @@
165
186
 void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
166
187
 void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark,
167
188
 		  kuid_t uid);
168
-void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
169
-			    u32 mark);
189
+void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif);
170
190
 void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
171
191
 
172
192
 struct netlink_callback;
..
..
@@ -175,13 +195,14 @@
175
195
 	struct sk_buff *skb;
176
196
 	struct netlink_callback *cb;
177
197
 	struct net *net;
198
+	struct fib_dump_filter filter;
178
199
 };
179
200
 
180
-int rt6_dump_route(struct fib6_info *f6i, void *p_arg);
201
+int rt6_dump_route(struct fib6_info *f6i, void *p_arg, unsigned int skip);
181
202
 void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
182
203
 void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
183
204
 void rt6_clean_tohost(struct net *net, struct in6_addr *gateway);
184
-void rt6_sync_up(struct net_device *dev, unsigned int nh_flags);
205
+void rt6_sync_up(struct net_device *dev, unsigned char nh_flags);
185
206
 void rt6_disable_ip(struct net_device *dev, unsigned long event);
186
207
 void rt6_sync_down_dev(struct net_device *dev, unsigned long event);
187
208
 void rt6_multipath_rebalance(struct fib6_info *f6i);
..
..
@@ -269,8 +290,8 @@
269
290
 	       inet6_sk(sk)->pmtudisc == IPV6_PMTUDISC_OMIT;
270
291
 }
271
292
 
272
-static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt,
273
-					   struct in6_addr *daddr)
293
+static inline const struct in6_addr *rt6_nexthop(const struct rt6_info *rt,
294
+						 const struct in6_addr *daddr)
274
295
 {
275
296
 	if (rt->rt6i_flags & RTF_GATEWAY)
276
297
 		return &rt->rt6i_gateway;
..
..
@@ -282,9 +303,16 @@
282
303
 
283
304
 static inline bool rt6_duplicate_nexthop(struct fib6_info *a, struct fib6_info *b)
284
305
 {
285
-	return a->fib6_nh.nh_dev == b->fib6_nh.nh_dev &&
286
-	       ipv6_addr_equal(&a->fib6_nh.nh_gw, &b->fib6_nh.nh_gw) &&
287
-	       !lwtunnel_cmp_encap(a->fib6_nh.nh_lwtstate, b->fib6_nh.nh_lwtstate);
306
+	struct fib6_nh *nha, *nhb;
307
+
308
+	if (a->nh || b->nh)
309
+		return nexthop_cmp(a->nh, b->nh);
310
+
311
+	nha = a->fib6_nh;
312
+	nhb = b->fib6_nh;
313
+	return nha->fib_nh_dev == nhb->fib_nh_dev &&
314
+	       ipv6_addr_equal(&nha->fib_nh_gw6, &nhb->fib_nh_gw6) &&
315
+	       !lwtunnel_cmp_encap(nha->fib_nh_lws, nhb->fib_nh_lws);
288
316
 }
289
317
 
290
318
 static inline unsigned int ip6_dst_mtu_forward(const struct dst_entry *dst)
..
..
@@ -309,8 +337,9 @@
309
337
 	return mtu - lwtunnel_headroom(dst->lwtstate, mtu);
310
338
 }
311
339
 
312
-u32 ip6_mtu_from_fib6(struct fib6_info *f6i, struct in6_addr *daddr,
313
-		      struct in6_addr *saddr);
340
+u32 ip6_mtu_from_fib6(const struct fib6_result *res,
341
+		      const struct in6_addr *daddr,
342
+		      const struct in6_addr *saddr);
314
343
 
315
344
 struct neighbour *ip6_neigh_lookup(const struct in6_addr *gw,
316
345
 				   struct net_device *dev, struct sk_buff *skb,