target/linux/generic/patches-3.2/643-bridge_remove_ipv6_dependency.patch

   1 --- a/include/net/addrconf.h
   2 +++ b/include/net/addrconf.h
   3 @@ -91,6 +91,12 @@ extern void                  addrconf_join_solict(struc
   4  extern void                    addrconf_leave_solict(struct inet6_dev *idev,
   5                                         const struct in6_addr *addr);
   6
   7 +extern int                     (*ipv6_dev_get_saddr_hook)(struct net *net,
   8 +                                               struct net_device *dev,
   9 +                                               const struct in6_addr *daddr,
  10 +                                               unsigned int srcprefs,
  11 +                                               struct in6_addr *saddr);
  12 +
  13  static inline unsigned long addrconf_timeout_fixup(u32 timeout,
  14                                                     unsigned unit)
  15  {
  16 --- a/net/bridge/Kconfig
  17 +++ b/net/bridge/Kconfig
  18 @@ -6,7 +6,6 @@ config BRIDGE
  19         tristate "802.1d Ethernet Bridging"
  20         select LLC
  21         select STP
  22 -       depends on IPV6 || IPV6=n
  23         ---help---
  24           If you say Y here, then your Linux box will be able to act as an
  25           Ethernet bridge, which means that the different Ethernet segments it
  26 --- a/net/ipv6/Makefile
  27 +++ b/net/ipv6/Makefile
  28 @@ -40,3 +40,4 @@ obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.
  29  obj-y += addrconf_core.o exthdrs_core.o
  30
  31  obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_hashtables.o
  32 +obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_stubs.o
  33 --- a/net/ipv6/addrconf.c
  34 +++ b/net/ipv6/addrconf.c
  35 @@ -1111,7 +1111,7 @@ out:
  36         return ret;
  37  }
  38
  39 -int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
  40 +static int __ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
  41                        const struct in6_addr *daddr, unsigned int prefs,
  42                        struct in6_addr *saddr)
  43  {
  44 @@ -1236,7 +1236,6 @@ try_nextdev:
  45         in6_ifa_put(hiscore->ifa);
  46         return 0;
  47  }
  48 -EXPORT_SYMBOL(ipv6_dev_get_saddr);
  49
  50  int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
  51                     unsigned char banned_flags)
  52 @@ -4818,6 +4817,9 @@ int __init addrconf_init(void)
  53
  54         ipv6_addr_label_rtnl_register();
  55
  56 +       BUG_ON(ipv6_dev_get_saddr_hook != NULL);
  57 +       rcu_assign_pointer(ipv6_dev_get_saddr_hook, __ipv6_dev_get_saddr);
  58 +
  59         return 0;
  60  errout:
  61         rtnl_af_unregister(&inet6_ops);
  62 @@ -4836,6 +4838,9 @@ void addrconf_cleanup(void)
  63         struct net_device *dev;
  64         int i;
  65
  66 +       rcu_assign_pointer(ipv6_dev_get_saddr_hook, NULL);
  67 +       synchronize_rcu();
  68 +
  69         unregister_netdevice_notifier(&ipv6_dev_notf);
  70         unregister_pernet_subsys(&addrconf_ops);
  71         ipv6_addr_label_cleanup();
  72 --- /dev/null
  73 +++ b/net/ipv6/inet6_stubs.c
  74 @@ -0,0 +1,33 @@
  75 +/*
  76 + *      This program is free software; you can redistribute it and/or
  77 + *      modify it under the terms of the GNU General Public License
  78 + *      as published by the Free Software Foundation; either version
  79 + *      2 of the License, or (at your option) any later version.
  80 + */
  81 +#include <linux/export.h>
  82 +#include <net/ipv6.h>
  83 +
  84 +int (*ipv6_dev_get_saddr_hook)(struct net *net, struct net_device *dev,
  85 +                       const struct in6_addr *daddr, unsigned int srcprefs,
  86 +                       struct in6_addr *saddr);
  87 +
  88 +EXPORT_SYMBOL(ipv6_dev_get_saddr_hook);
  89 +
  90 +int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
  91 +                       const struct in6_addr *daddr, unsigned int prefs,
  92 +                       struct in6_addr *saddr)
  93 +{
  94 +       int ret = -EADDRNOTAVAIL;
  95 +       typeof(ipv6_dev_get_saddr_hook) dev_get_saddr;
  96 +
  97 +       rcu_read_lock();
  98 +       dev_get_saddr = rcu_dereference(ipv6_dev_get_saddr_hook);
  99 +
 100 +       if (dev_get_saddr)
 101 +               ret = dev_get_saddr(net, dst_dev, daddr, prefs, saddr);
 102 +
 103 +       rcu_read_unlock();
 104 +       return ret;
 105 +}
 106 +EXPORT_SYMBOL(ipv6_dev_get_saddr);
 107 +