1 files changed, 19 insertions, 6 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 66d8c3d912fd..a0ae1c9d37df 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -231,7 +231,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
 	.proxy_ndp		= 0,
 	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
 	.disable_ipv6		= 0,
-	.accept_dad		= 1,
+	.accept_dad		= 0,
 	.suppress_frag_ndisc	= 1,
 	.accept_ra_mtu		= 1,
 	.stable_secret		= {
@@ -1267,7 +1267,9 @@ out:
 	in6_ifa_put(ifp);
 }
 
-static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
+static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp,
+				struct inet6_ifaddr *ift,
+				bool block)
 {
 	struct inet6_dev *idev = ifp->idev;
 	struct in6_addr addr, *tmpaddr;
@@ -1371,7 +1373,7 @@ retry:
 
 	ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
 			    ipv6_addr_scope(&addr), addr_flags,
-			    tmp_valid_lft, tmp_prefered_lft, true, NULL);
+			    tmp_valid_lft, tmp_prefered_lft, block, NULL);
 	if (IS_ERR(ift)) {
 		in6_ifa_put(ifp);
 		in6_dev_put(idev);
@@ -1956,7 +1958,7 @@ static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
 		if (ifpub) {
 			in6_ifa_hold(ifpub);
 			spin_unlock_bh(&ifp->lock);
-			ipv6_create_tempaddr(ifpub, ifp);
+			ipv6_create_tempaddr(ifpub, ifp, true);
 			in6_ifa_put(ifpub);
 		} else {
 			spin_unlock_bh(&ifp->lock);
@@ -2456,7 +2458,7 @@ static void manage_tempaddrs(struct inet6_dev *idev,
 		 * no temporary address currently exists.
 		 */
 		read_unlock_bh(&idev->lock);
-		ipv6_create_tempaddr(ifp, NULL);
+		ipv6_create_tempaddr(ifp, NULL, false);
 	} else {
 		read_unlock_bh(&idev->lock);
 	}
@@ -4351,7 +4353,7 @@ restart:
 						spin_lock(&ifpub->lock);
 						ifpub->regen_count = 0;
 						spin_unlock(&ifpub->lock);
-						ipv6_create_tempaddr(ifpub, ifp);
+						ipv6_create_tempaddr(ifpub, ifp, true);
 						in6_ifa_put(ifpub);
 						in6_ifa_put(ifp);
 						goto restart;
@@ -5057,6 +5059,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 	array[DEVCONF_ENHANCED_DAD] = cnf->enhanced_dad;
 	array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode;
 	array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy;
+	array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass;
 }
 
 static inline size_t inet6_ifla6_size(void)
@@ -5984,6 +5987,7 @@ int addrconf_sysctl_disable_policy(struct ctl_table *ctl, int write,
 }
 
 static int minus_one = -1;
+static const int zero = 0;
 static const int one = 1;
 static const int two_five_five = 255;
 
@@ -6355,6 +6359,15 @@ static const struct ctl_table addrconf_sysctl[] = {
 		.proc_handler   = addrconf_sysctl_disable_policy,
 	},
 	{
+		.procname	= "ndisc_tclass",
+		.data		= &ipv6_devconf.ndisc_tclass,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= (void *)&zero,
+		.extra2		= (void *)&two_five_five,
+	},
+	{
 		/* sentinel */
 	}
 };