1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -91,6 +91,12 @@ extern void addrconf_join_solict(struc
extern void addrconf_leave_solict(struct inet6_dev *idev,
const struct in6_addr *addr);
+extern int (*ipv6_dev_get_saddr_hook)(struct net *net,
+ struct net_device *dev,
+ const struct in6_addr *daddr,
+ unsigned int srcprefs,
+ struct in6_addr *saddr);
+
static inline unsigned long addrconf_timeout_fixup(u32 timeout,
unsigned unit)
{
--- a/net/bridge/Kconfig
+++ b/net/bridge/Kconfig
@@ -6,7 +6,6 @@ config BRIDGE
tristate "802.1d Ethernet Bridging"
select LLC
select STP
- depends on IPV6 || IPV6=n
---help---
If you say Y here, then your Linux box will be able to act as an
Ethernet bridge, which means that the different Ethernet segments it
--- a/net/ipv6/Makefile
+++ b/net/ipv6/Makefile
@@ -40,3 +40,4 @@ obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.
obj-y += addrconf_core.o exthdrs_core.o
obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_hashtables.o
+obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_stubs.o
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1106,7 +1106,7 @@ out:
return ret;
}
-int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
+static int __ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
const struct in6_addr *daddr, unsigned int prefs,
struct in6_addr *saddr)
{
@@ -1231,7 +1231,6 @@ try_nextdev:
in6_ifa_put(hiscore->ifa);
return 0;
}
-EXPORT_SYMBOL(ipv6_dev_get_saddr);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
unsigned char banned_flags)
@@ -4748,6 +4747,9 @@ int __init addrconf_init(void)
ipv6_addr_label_rtnl_register();
+ BUG_ON(ipv6_dev_get_saddr_hook != NULL);
+ rcu_assign_pointer(ipv6_dev_get_saddr_hook, __ipv6_dev_get_saddr);
+
return 0;
errout:
rtnl_af_unregister(&inet6_ops);
@@ -4766,6 +4768,9 @@ void addrconf_cleanup(void)
struct net_device *dev;
int i;
+ rcu_assign_pointer(ipv6_dev_get_saddr_hook, NULL);
+ synchronize_rcu();
+
unregister_netdevice_notifier(&ipv6_dev_notf);
unregister_pernet_subsys(&addrconf_ops);
ipv6_addr_label_cleanup();
--- /dev/null
+++ b/net/ipv6/inet6_stubs.c
@@ -0,0 +1,27 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <net/ipv6.h>
+
+int (*ipv6_dev_get_saddr_hook)(struct net *net, struct net_device *dev,
+ const struct in6_addr *daddr, unsigned int srcprefs,
+ struct in6_addr *saddr);
+
+EXPORT_SYMBOL(ipv6_dev_get_saddr_hook);
+
+int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
+ const struct in6_addr *daddr, unsigned int prefs,
+ struct in6_addr *saddr)
+{
+ typeof(ipv6_dev_get_saddr_hook) dev_get_saddr = rcu_dereference(ipv6_dev_get_saddr_hook);
+
+ if (dev_get_saddr)
+ return dev_get_saddr(net, dst_dev, daddr, prefs, saddr);
+
+ return -EADDRNOTAVAIL;
+}
+EXPORT_SYMBOL(ipv6_dev_get_saddr);
+
|
