ipv6: Add disable_ipv6 sysctl to disable IPv6 operaion on specific interface.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8b6875f02039..8c5cff50bbed 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -183,6 +183,7 @@ struct ipv6_devconf ipv6_devconf __read_mostly = {
 #endif
         .proxy_ndp              = 0,
         .accept_source_route    = 0,    /* we do not accept RH0 by default. */
+        .disable_ipv6           = 0,
 };
 
 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@@ -215,6 +216,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
 #endif
         .proxy_ndp              = 0,
         .accept_source_route    = 0,    /* we do not accept RH0 by default. */
+        .disable_ipv6           = 0,
 };
 
 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@@ -3657,6 +3659,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 #ifdef CONFIG_IPV6_MROUTE
         array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
 #endif
+        array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
 }
 
 static inline size_t inet6_if_nlmsg_size(void)
@@ -4216,6 +4219,14 @@ static struct addrconf_sysctl_table
                 },
 #endif
                 {
+                        .ctl_name       =       CTL_UNNUMBERED,
+                        .procname       =       "disable_ipv6",
+                        .data           =       &ipv6_devconf.disable_ipv6,
+                        .maxlen         =       sizeof(int),
+                        .mode           =       0644,
+                        .proc_handler   =       &proc_dointvec,
+                },
+                {
                         .ctl_name       =       0,      /* sentinel */
                 }
         },