1 files changed, 91 insertions, 121 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index cfdcf7b2daf6..d6ff12617f36 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -99,9 +99,9 @@
 #define ACONF_DEBUG 2
 
 #if ACONF_DEBUG >= 3
-#define ADBG(x) printk x
+#define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
 #else
-#define ADBG(x)
+#define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
 #endif
 
 #define	INFINITY_LIFE_TIME	0xFFFFFFFF
@@ -177,6 +177,8 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
 	.accept_redirects	= 1,
 	.autoconf		= 1,
 	.force_mld_version	= 0,
+	.mldv1_unsolicited_report_interval = 10 * HZ,
+	.mldv2_unsolicited_report_interval = HZ,
 	.dad_transmits		= 1,
 	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
 	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
@@ -202,6 +204,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
 	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
 	.disable_ipv6		= 0,
 	.accept_dad		= 1,
+	.suppress_frag_ndisc	= 1,
 };
 
 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@@ -211,6 +214,9 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
 	.accept_ra		= 1,
 	.accept_redirects	= 1,
 	.autoconf		= 1,
+	.force_mld_version	= 0,
+	.mldv1_unsolicited_report_interval = 10 * HZ,
+	.mldv2_unsolicited_report_interval = HZ,
 	.dad_transmits		= 1,
 	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
 	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
@@ -236,17 +242,9 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
 	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
 	.disable_ipv6		= 0,
 	.accept_dad		= 1,
+	.suppress_frag_ndisc	= 1,
 };
 
-/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
-const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
-const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
-const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
-const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
-const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT;
-const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT;
-const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT;
-
 /* Check if a valid qdisc is available */
 static inline bool addrconf_qdisc_ok(const struct net_device *dev)
 {
@@ -306,36 +304,6 @@ err_ip:
 	return -ENOMEM;
 }
 
-static void snmp6_free_dev(struct inet6_dev *idev)
-{
-	kfree(idev->stats.icmpv6msgdev);
-	kfree(idev->stats.icmpv6dev);
-	snmp_mib_free((void __percpu **)idev->stats.ipv6);
-}
-
-/* Nobody refers to this device, we may destroy it. */
-
-void in6_dev_finish_destroy(struct inet6_dev *idev)
-{
-	struct net_device *dev = idev->dev;
-
-	WARN_ON(!list_empty(&idev->addr_list));
-	WARN_ON(idev->mc_list != NULL);
-	WARN_ON(timer_pending(&idev->rs_timer));
-
-#ifdef NET_REFCNT_DEBUG
-	pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL");
-#endif
-	dev_put(dev);
-	if (!idev->dead) {
-		pr_warn("Freeing alive inet6 device %p\n", idev);
-		return;
-	}
-	snmp6_free_dev(idev);
-	kfree_rcu(idev, rcu);
-}
-EXPORT_SYMBOL(in6_dev_finish_destroy);
-
 static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 {
 	struct inet6_dev *ndev;
@@ -369,9 +337,9 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 	dev_hold(dev);
 
 	if (snmp6_alloc_dev(ndev) < 0) {
-		ADBG((KERN_WARNING
+		ADBG(KERN_WARNING
 			"%s: cannot allocate memory for statistics; dev=%s.\n",
-			__func__, dev->name));
+			__func__, dev->name);
 		neigh_parms_release(&nd_tbl, ndev->nd_parms);
 		dev_put(dev);
 		kfree(ndev);
@@ -379,9 +347,9 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 	}
 
 	if (snmp6_register_dev(ndev) < 0) {
-		ADBG((KERN_WARNING
+		ADBG(KERN_WARNING
 			"%s: cannot create /proc/net/dev_snmp6/%s\n",
-			__func__, dev->name));
+			__func__, dev->name);
 		neigh_parms_release(&nd_tbl, ndev->nd_parms);
 		ndev->dead = 1;
 		in6_dev_finish_destroy(ndev);
@@ -813,8 +781,9 @@ static u32 inet6_addr_hash(const struct in6_addr *addr)
 /* On success it returns ifp with increased reference count */
 
 static struct inet6_ifaddr *
-ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
-	      int scope, u32 flags)
+ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
+	      const struct in6_addr *peer_addr, int pfxlen,
+	      int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
 {
 	struct inet6_ifaddr *ifa = NULL;
 	struct rt6_info *rt;
@@ -843,7 +812,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 
 	/* Ignore adding duplicate addresses on an interface */
 	if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
-		ADBG(("ipv6_add_addr: already assigned\n"));
+		ADBG("ipv6_add_addr: already assigned\n");
 		err = -EEXIST;
 		goto out;
 	}
@@ -851,7 +820,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 	ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
 
 	if (ifa == NULL) {
-		ADBG(("ipv6_add_addr: malloc failed\n"));
+		ADBG("ipv6_add_addr: malloc failed\n");
 		err = -ENOBUFS;
 		goto out;
 	}
@@ -863,6 +832,8 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 	}
 
 	ifa->addr = *addr;
+	if (peer_addr)
+		ifa->peer_addr = *peer_addr;
 
 	spin_lock_init(&ifa->lock);
 	spin_lock_init(&ifa->state_lock);
@@ -872,6 +843,8 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 	ifa->scope = scope;
 	ifa->prefix_len = pfxlen;
 	ifa->flags = flags | IFA_F_TENTATIVE;
+	ifa->valid_lft = valid_lft;
+	ifa->prefered_lft = prefered_lft;
 	ifa->cstamp = ifa->tstamp = jiffies;
 	ifa->tokenized = false;
 
@@ -1049,7 +1022,6 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *i
 	unsigned long regen_advance;
 	int tmp_plen;
 	int ret = 0;
-	int max_addresses;
 	u32 addr_flags;
 	unsigned long now = jiffies;
 
@@ -1095,7 +1067,6 @@ retry:
 				 idev->cnf.temp_prefered_lft + age -
 				 idev->cnf.max_desync_factor);
 	tmp_plen = ifp->prefix_len;
-	max_addresses = idev->cnf.max_addresses;
 	tmp_tstamp = ifp->tstamp;
 	spin_unlock_bh(&ifp->lock);
 
@@ -1121,11 +1092,10 @@ retry:
 	if (ifp->flags & IFA_F_OPTIMISTIC)
 		addr_flags |= IFA_F_OPTIMISTIC;
 
-	ift = !max_addresses ||
-	      ipv6_count_addresses(idev) < max_addresses ?
-		ipv6_add_addr(idev, &addr, tmp_plen, ipv6_addr_scope(&addr),
-			      addr_flags) : NULL;
-	if (IS_ERR_OR_NULL(ift)) {
+	ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
+			    ipv6_addr_scope(&addr), addr_flags,
+			    tmp_valid_lft, tmp_prefered_lft);
+	if (IS_ERR(ift)) {
 		in6_ifa_put(ifp);
 		in6_dev_put(idev);
 		pr_info("%s: retry temporary address regeneration\n", __func__);
@@ -1136,8 +1106,6 @@ retry:
 
 	spin_lock_bh(&ift->lock);
 	ift->ifpub = ifp;
-	ift->valid_lft = tmp_valid_lft;
-	ift->prefered_lft = tmp_prefered_lft;
 	ift->cstamp = now;
 	ift->tstamp = tmp_tstamp;
 	spin_unlock_bh(&ift->lock);
@@ -1805,6 +1773,16 @@ static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
 	return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
 }
 
+static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
+{
+	memcpy(eui, dev->perm_addr, 3);
+	memcpy(eui + 5, dev->perm_addr + 3, 3);
+	eui[3] = 0xFF;
+	eui[4] = 0xFE;
+	eui[0] ^= 2;
+	return 0;
+}
+
 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
 {
 	switch (dev->type) {
@@ -1823,6 +1801,8 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
 		return addrconf_ifid_eui64(eui, dev);
 	case ARPHRD_IEEE1394:
 		return addrconf_ifid_ieee1394(eui, dev);
+	case ARPHRD_TUNNEL6:
+		return addrconf_ifid_ip6tnl(eui, dev);
 	}
 	return -1;
 }
@@ -2048,7 +2028,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
 	pinfo = (struct prefix_info *) opt;
 
 	if (len < sizeof(struct prefix_info)) {
-		ADBG(("addrconf: prefix option too short\n"));
+		ADBG("addrconf: prefix option too short\n");
 		return;
 	}
 
@@ -2179,16 +2159,19 @@ ok:
 			 */
 			if (!max_addresses ||
 			    ipv6_count_addresses(in6_dev) < max_addresses)
-				ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
+				ifp = ipv6_add_addr(in6_dev, &addr, NULL,
+						    pinfo->prefix_len,
 						    addr_type&IPV6_ADDR_SCOPE_MASK,
-						    addr_flags);
+						    addr_flags, valid_lft,
+						    prefered_lft);
 
 			if (IS_ERR_OR_NULL(ifp)) {
 				in6_dev_put(in6_dev);
 				return;
 			}
 
-			update_lft = create = 1;
+			update_lft = 0;
+			create = 1;
 			ifp->cstamp = jiffies;
 			ifp->tokenized = tokenized;
 			addrconf_dad_start(ifp);
@@ -2209,7 +2192,7 @@ ok:
 				stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
 			else
 				stored_lft = 0;
-			if (!update_lft && stored_lft) {
+			if (!update_lft && !create && stored_lft) {
 				if (valid_lft > MIN_VALID_LIFETIME ||
 				    valid_lft > stored_lft)
 					update_lft = 1;
@@ -2455,17 +2438,10 @@ static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *p
 		prefered_lft = timeout;
 	}
 
-	ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
+	ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
+			    valid_lft, prefered_lft);
 
 	if (!IS_ERR(ifp)) {
-		spin_lock_bh(&ifp->lock);
-		ifp->valid_lft = valid_lft;
-		ifp->prefered_lft = prefered_lft;
-		ifp->tstamp = jiffies;
-		if (peer_pfx)
-			ifp->peer_addr = *peer_pfx;
-		spin_unlock_bh(&ifp->lock);
-
 		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
 				      expires, flags);
 		/*
@@ -2557,7 +2533,8 @@ static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
 {
 	struct inet6_ifaddr *ifp;
 
-	ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
+	ifp = ipv6_add_addr(idev, addr, NULL, plen,
+			    scope, IFA_F_PERMANENT, 0, 0);
 	if (!IS_ERR(ifp)) {
 		spin_lock_bh(&ifp->lock);
 		ifp->flags &= ~IFA_F_TENTATIVE;
@@ -2683,7 +2660,7 @@ static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr
 #endif
 
 
-	ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
+	ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0);
 	if (!IS_ERR(ifp)) {
 		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
 		addrconf_dad_start(ifp);
@@ -2703,7 +2680,8 @@ static void addrconf_dev_config(struct net_device *dev)
 	    (dev->type != ARPHRD_ARCNET) &&
 	    (dev->type != ARPHRD_INFINIBAND) &&
 	    (dev->type != ARPHRD_IEEE802154) &&
-	    (dev->type != ARPHRD_IEEE1394)) {
+	    (dev->type != ARPHRD_IEEE1394) &&
+	    (dev->type != ARPHRD_TUNNEL6)) {
 		/* Alas, we support only Ethernet autoconfiguration. */
 		return;
 	}
@@ -2789,44 +2767,6 @@ ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
 	return -1;
 }
 
-static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
-{
-	struct net_device *link_dev;
-	struct net *net = dev_net(idev->dev);
-
-	/* first try to inherit the link-local address from the link device */
-	if (idev->dev->iflink &&
-	    (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
-		if (!ipv6_inherit_linklocal(idev, link_dev))
-			return;
-	}
-	/* then try to inherit it from any device */
-	for_each_netdev(net, link_dev) {
-		if (!ipv6_inherit_linklocal(idev, link_dev))
-			return;
-	}
-	pr_debug("init ip6-ip6: add_linklocal failed\n");
-}
-
-/*
- * Autoconfigure tunnel with a link-local address so routing protocols,
- * DHCPv6, MLD etc. can be run over the virtual link
- */
-
-static void addrconf_ip6_tnl_config(struct net_device *dev)
-{
-	struct inet6_dev *idev;
-
-	ASSERT_RTNL();
-
-	idev = addrconf_add_dev(dev);
-	if (IS_ERR(idev)) {
-		pr_debug("init ip6-ip6: add_dev failed\n");
-		return;
-	}
-	ip6_tnl_add_linklocal(idev);
-}
-
 static int addrconf_notify(struct notifier_block *this, unsigned long event,
 			   void *ptr)
 {
@@ -2894,9 +2834,6 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 			addrconf_gre_config(dev);
 			break;
 #endif
-		case ARPHRD_TUNNEL6:
-			addrconf_ip6_tnl_config(dev);
-			break;
 		case ARPHRD_LOOPBACK:
 			init_loopback(dev);
 			break;
@@ -3121,6 +3058,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 static void addrconf_rs_timer(unsigned long data)
 {
 	struct inet6_dev *idev = (struct inet6_dev *)data;
+	struct net_device *dev = idev->dev;
 	struct in6_addr lladdr;
 
 	write_lock(&idev->lock);
@@ -3135,12 +3073,14 @@ static void addrconf_rs_timer(unsigned long data)
 		goto out;
 
 	if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
-		if (!__ipv6_get_lladdr(idev, &lladdr, IFA_F_TENTATIVE))
-			ndisc_send_rs(idev->dev, &lladdr,
+		write_unlock(&idev->lock);
+		if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
+			ndisc_send_rs(dev, &lladdr,
 				      &in6addr_linklocal_allrouters);
 		else
-			goto out;
+			goto put;
 
+		write_lock(&idev->lock);
 		/* The wait after the last probe can be shorter */
 		addrconf_mod_rs_timer(idev, (idev->rs_probes ==
 					     idev->cnf.rtr_solicits) ?
@@ -3156,6 +3096,7 @@ static void addrconf_rs_timer(unsigned long data)
 
 out:
 	write_unlock(&idev->lock);
+put:
 	in6_dev_put(idev);
 }
 
@@ -3631,8 +3572,8 @@ restart:
 	if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
 		next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
 
-	ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
-	      now, next, next_sec, next_sched));
+	ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
+	      now, next, next_sec, next_sched);
 
 	addr_chk_timer.expires = next_sched;
 	add_timer(&addr_chk_timer);
@@ -4178,6 +4119,10 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 	array[DEVCONF_RTR_SOLICIT_DELAY] =
 		jiffies_to_msecs(cnf->rtr_solicit_delay);
 	array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
+	array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
+		jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
+	array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
+		jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
 #ifdef CONFIG_IPV6_PRIVACY
 	array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
 	array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
@@ -4208,6 +4153,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 	array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
 	array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
 	array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
+	array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
 }
 
 static inline size_t inet6_ifla6_size(void)
@@ -4653,6 +4599,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 		break;
 	}
 	atomic_inc(&net->ipv6.dev_addr_genid);
+	rt_genid_bump_ipv6(net);
 }
 
 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
@@ -4860,6 +4807,22 @@ static struct addrconf_sysctl_table
 			.mode		= 0644,
 			.proc_handler	= proc_dointvec,
 		},
+		{
+			.procname	= "mldv1_unsolicited_report_interval",
+			.data		=
+				&ipv6_devconf.mldv1_unsolicited_report_interval,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= proc_dointvec_ms_jiffies,
+		},
+		{
+			.procname	= "mldv2_unsolicited_report_interval",
+			.data		=
+				&ipv6_devconf.mldv2_unsolicited_report_interval,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= proc_dointvec_ms_jiffies,
+		},
 #ifdef CONFIG_IPV6_PRIVACY
 		{
 			.procname	= "use_tempaddr",
@@ -5005,6 +4968,13 @@ static struct addrconf_sysctl_table
 			.proc_handler   = proc_dointvec
 		},
 		{
+			.procname	= "suppress_frag_ndisc",
+			.data		= &ipv6_devconf.suppress_frag_ndisc,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= proc_dointvec
+		},
+		{
 			/* sentinel */
 		}
 	},