ipv6 netns: Address labels per namespace

This pacth makes IPv6 address labels per network namespace.
It keeps the global label tables, ip6addrlbl_table, but
adds a 'net' member to each ip6addrlbl_entry.
This new member is taken into account when matching labels.

Changelog
=========
* v1: Initial version
* v2:
  * Minize the penalty when network namespaces are not configured:
      *  the 'net' member is added only if CONFIG_NET_NS is
         defined. This saves space when network namespaces are not
         configured.
      * 'net' value is retrieved with the inlined function
         ip6addrlbl_net() that always return &init_net when
         CONFIG_NET_NS is not defined.
  * 'net' member in ip6addrlbl_entry renamed to the less generic
    'lbl_net' name (helps code search).

Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index bbd3d583c6e6..06b28142b3ab 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -121,7 +121,8 @@ static inline int addrconf_finite_timeout(unsigned long timeout)
  */
 extern int                      ipv6_addr_label_init(void);
 extern void                     ipv6_addr_label_rtnl_register(void);
-extern u32                      ipv6_addr_label(const struct in6_addr *addr,
+extern u32                      ipv6_addr_label(struct net *net,
+                                                const struct in6_addr *addr,
                                                 int type, int ifindex);
 
 /*