1 files changed, 198 insertions, 158 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 19727d941962..445006ee4522 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -78,8 +78,6 @@
 
 #ifdef CONFIG_IPV6_PRIVACY
 #include <linux/random.h>
-#include <linux/crypto.h>
-#include <linux/scatterlist.h>
 #endif
 
 #include <asm/uaccess.h>
@@ -110,8 +108,6 @@ static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad
 static void ipv6_regen_rndid(unsigned long data);
 
 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
-static struct crypto_tfm *md5_tfm;
-static DEFINE_SPINLOCK(md5_tfm_lock);
 #endif
 
 static int ipv6_count_addresses(struct inet6_dev *idev);
@@ -147,7 +143,7 @@ static void inet6_prefix_notify(int event, struct inet6_dev *idev,
 				struct prefix_info *pinfo);
 static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
 
-static struct notifier_block *inet6addr_chain;
+static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
 
 struct ipv6_devconf ipv6_devconf = {
 	.forwarding		= 0,
@@ -169,6 +165,15 @@ struct ipv6_devconf ipv6_devconf = {
 	.max_desync_factor	= MAX_DESYNC_FACTOR,
 #endif
 	.max_addresses		= IPV6_MAX_ADDRESSES,
+	.accept_ra_defrtr	= 1,
+	.accept_ra_pinfo	= 1,
+#ifdef CONFIG_IPV6_ROUTER_PREF
+	.accept_ra_rtr_pref	= 1,
+	.rtr_probe_interval	= 60 * HZ,
+#ifdef CONFIG_IPV6_ROUTE_INFO
+	.accept_ra_rt_info_max_plen = 0,
+#endif
+#endif
 };
 
 static struct ipv6_devconf ipv6_devconf_dflt = {
@@ -190,6 +195,15 @@ static struct ipv6_devconf ipv6_devconf_dflt = {
 	.max_desync_factor	= MAX_DESYNC_FACTOR,
 #endif
 	.max_addresses		= IPV6_MAX_ADDRESSES,
+	.accept_ra_defrtr	= 1,
+	.accept_ra_pinfo	= 1,
+#ifdef CONFIG_IPV6_ROUTER_PREF
+	.accept_ra_rtr_pref	= 1,
+	.rtr_probe_interval	= 60 * HZ,
+#ifdef CONFIG_IPV6_ROUTE_INFO
+	.accept_ra_rt_info_max_plen = 0,
+#endif
+#endif
 };
 
 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@@ -327,86 +341,83 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
 	if (dev->mtu < IPV6_MIN_MTU)
 		return NULL;
 
-	ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
+ 	ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
 
-	if (ndev) {
-		memset(ndev, 0, sizeof(struct inet6_dev));
+ 	if (ndev == NULL)
+ 		return NULL;
 
-		rwlock_init(&ndev->lock);
-		ndev->dev = dev;
-		memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
-		ndev->cnf.mtu6 = dev->mtu;
-		ndev->cnf.sysctl = NULL;
-		ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
-		if (ndev->nd_parms == NULL) {
-			kfree(ndev);
-			return NULL;
-		}
-		/* We refer to the device */
-		dev_hold(dev);
-
-		if (snmp6_alloc_dev(ndev) < 0) {
-			ADBG((KERN_WARNING
-				"%s(): cannot allocate memory for statistics; dev=%s.\n",
-				__FUNCTION__, dev->name));
-			neigh_parms_release(&nd_tbl, ndev->nd_parms);
-			ndev->dead = 1;
-			in6_dev_finish_destroy(ndev);
-			return NULL;
-		}
+	rwlock_init(&ndev->lock);
+	ndev->dev = dev;
+	memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
+	ndev->cnf.mtu6 = dev->mtu;
+	ndev->cnf.sysctl = NULL;
+	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
+	if (ndev->nd_parms == NULL) {
+		kfree(ndev);
+		return NULL;
+	}
+	/* We refer to the device */
+	dev_hold(dev);
 
-		if (snmp6_register_dev(ndev) < 0) {
-			ADBG((KERN_WARNING
-				"%s(): cannot create /proc/net/dev_snmp6/%s\n",
-				__FUNCTION__, dev->name));
-			neigh_parms_release(&nd_tbl, ndev->nd_parms);
-			ndev->dead = 1;
-			in6_dev_finish_destroy(ndev);
-			return NULL;
-		}
+	if (snmp6_alloc_dev(ndev) < 0) {
+		ADBG((KERN_WARNING
+			"%s(): cannot allocate memory for statistics; dev=%s.\n",
+			__FUNCTION__, dev->name));
+		neigh_parms_release(&nd_tbl, ndev->nd_parms);
+		ndev->dead = 1;
+		in6_dev_finish_destroy(ndev);
+		return NULL;
+	}
 
-		/* One reference from device.  We must do this before
-		 * we invoke __ipv6_regen_rndid().
-		 */
-		in6_dev_hold(ndev);
+	if (snmp6_register_dev(ndev) < 0) {
+		ADBG((KERN_WARNING
+			"%s(): cannot create /proc/net/dev_snmp6/%s\n",
+			__FUNCTION__, dev->name));
+		neigh_parms_release(&nd_tbl, ndev->nd_parms);
+		ndev->dead = 1;
+		in6_dev_finish_destroy(ndev);
+		return NULL;
+	}
+
+	/* One reference from device.  We must do this before
+	 * we invoke __ipv6_regen_rndid().
+	 */
+	in6_dev_hold(ndev);
 
 #ifdef CONFIG_IPV6_PRIVACY
-		get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
-		get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
-		init_timer(&ndev->regen_timer);
-		ndev->regen_timer.function = ipv6_regen_rndid;
-		ndev->regen_timer.data = (unsigned long) ndev;
-		if ((dev->flags&IFF_LOOPBACK) ||
-		    dev->type == ARPHRD_TUNNEL ||
-		    dev->type == ARPHRD_NONE ||
-		    dev->type == ARPHRD_SIT) {
-			printk(KERN_INFO
-			       "%s: Disabled Privacy Extensions\n",
-			       dev->name);
-			ndev->cnf.use_tempaddr = -1;
-		} else {
-			in6_dev_hold(ndev);
-			ipv6_regen_rndid((unsigned long) ndev);
-		}
+	init_timer(&ndev->regen_timer);
+	ndev->regen_timer.function = ipv6_regen_rndid;
+	ndev->regen_timer.data = (unsigned long) ndev;
+	if ((dev->flags&IFF_LOOPBACK) ||
+	    dev->type == ARPHRD_TUNNEL ||
+	    dev->type == ARPHRD_NONE ||
+	    dev->type == ARPHRD_SIT) {
+		printk(KERN_INFO
+		       "%s: Disabled Privacy Extensions\n",
+		       dev->name);
+		ndev->cnf.use_tempaddr = -1;
+	} else {
+		in6_dev_hold(ndev);
+		ipv6_regen_rndid((unsigned long) ndev);
+	}
 #endif
 
-		if (netif_carrier_ok(dev))
-			ndev->if_flags |= IF_READY;
+	if (netif_carrier_ok(dev))
+		ndev->if_flags |= IF_READY;
 
-		write_lock_bh(&addrconf_lock);
-		dev->ip6_ptr = ndev;
-		write_unlock_bh(&addrconf_lock);
+	write_lock_bh(&addrconf_lock);
+	dev->ip6_ptr = ndev;
+	write_unlock_bh(&addrconf_lock);
 
-		ipv6_mc_init_dev(ndev);
-		ndev->tstamp = jiffies;
+	ipv6_mc_init_dev(ndev);
+	ndev->tstamp = jiffies;
 #ifdef CONFIG_SYSCTL
-		neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, 
-				      NET_IPV6_NEIGH, "ipv6",
-				      &ndisc_ifinfo_sysctl_change,
-				      NULL);
-		addrconf_sysctl_register(ndev, &ndev->cnf);
+	neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
+			      NET_IPV6_NEIGH, "ipv6",
+			      &ndisc_ifinfo_sysctl_change,
+			      NULL);
+	addrconf_sysctl_register(ndev, &ndev->cnf);
 #endif
-	}
 	return ndev;
 }
 
@@ -524,7 +535,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 		goto out;
 	}
 
-	ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
+	ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
 
 	if (ifa == NULL) {
 		ADBG(("ipv6_add_addr: malloc failed\n"));
@@ -538,7 +549,6 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 		goto out;
 	}
 
-	memset(ifa, 0, sizeof(struct inet6_ifaddr));
 	ipv6_addr_copy(&ifa->addr, addr);
 
 	spin_lock_init(&ifa->lock);
@@ -583,7 +593,7 @@ out2:
 	read_unlock_bh(&addrconf_lock);
 
 	if (likely(err == 0))
-		notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
+		atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
 	else {
 		kfree(ifa);
 		ifa = ERR_PTR(err);
@@ -678,7 +688,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 
 	ipv6_ifa_notify(RTM_DELADDR, ifp);
 
-	notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
+	atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
 
 	addrconf_del_timer(ifp);
 
@@ -1305,52 +1315,67 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
 	__ipv6_dev_ac_dec(ifp->idev, &addr);
 }
 
+static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
+{
+	if (dev->addr_len != ETH_ALEN)
+		return -1;
+	memcpy(eui, dev->dev_addr, 3);
+	memcpy(eui + 5, dev->dev_addr + 3, 3);
+
+	/*
+	 * The zSeries OSA network cards can be shared among various
+	 * OS instances, but the OSA cards have only one MAC address.
+	 * This leads to duplicate address conflicts in conjunction
+	 * with IPv6 if more than one instance uses the same card.
+	 *
+	 * The driver for these cards can deliver a unique 16-bit
+	 * identifier for each instance sharing the same card.  It is
+	 * placed instead of 0xFFFE in the interface identifier.  The
+	 * "u" bit of the interface identifier is not inverted in this
+	 * case.  Hence the resulting interface identifier has local
+	 * scope according to RFC2373.
+	 */
+	if (dev->dev_id) {
+		eui[3] = (dev->dev_id >> 8) & 0xFF;
+		eui[4] = dev->dev_id & 0xFF;
+	} else {
+		eui[3] = 0xFF;
+		eui[4] = 0xFE;
+		eui[0] ^= 2;
+	}
+	return 0;
+}
+
+static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
+{
+	/* XXX: inherit EUI-64 from other interface -- yoshfuji */
+	if (dev->addr_len != ARCNET_ALEN)
+		return -1;
+	memset(eui, 0, 7);
+	eui[7] = *(u8*)dev->dev_addr;
+	return 0;
+}
+
+static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
+{
+	if (dev->addr_len != INFINIBAND_ALEN)
+		return -1;
+	memcpy(eui, dev->dev_addr + 12, 8);
+	eui[0] |= 2;
+	return 0;
+}
+
 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
 {
 	switch (dev->type) {
 	case ARPHRD_ETHER:
 	case ARPHRD_FDDI:
 	case ARPHRD_IEEE802_TR:
-		if (dev->addr_len != ETH_ALEN)
-			return -1;
-		memcpy(eui, dev->dev_addr, 3);
-		memcpy(eui + 5, dev->dev_addr + 3, 3);
-
-		/*
-		 * The zSeries OSA network cards can be shared among various
-		 * OS instances, but the OSA cards have only one MAC address.
-		 * This leads to duplicate address conflicts in conjunction
-		 * with IPv6 if more than one instance uses the same card.
-		 * 
-		 * The driver for these cards can deliver a unique 16-bit
-		 * identifier for each instance sharing the same card.  It is
-		 * placed instead of 0xFFFE in the interface identifier.  The
-		 * "u" bit of the interface identifier is not inverted in this
-		 * case.  Hence the resulting interface identifier has local
-		 * scope according to RFC2373.
-		 */
-		if (dev->dev_id) {
-			eui[3] = (dev->dev_id >> 8) & 0xFF;
-			eui[4] = dev->dev_id & 0xFF;
-		} else {
-			eui[3] = 0xFF;
-			eui[4] = 0xFE;
-			eui[0] ^= 2;
-		}
-		return 0;
+		return addrconf_ifid_eui48(eui, dev);
 	case ARPHRD_ARCNET:
-		/* XXX: inherit EUI-64 from other interface -- yoshfuji */
-		if (dev->addr_len != ARCNET_ALEN)
-			return -1;
-		memset(eui, 0, 7);
-		eui[7] = *(u8*)dev->dev_addr;
-		return 0;
+		return addrconf_ifid_arcnet(eui, dev);
 	case ARPHRD_INFINIBAND:
-		if (dev->addr_len != INFINIBAND_ALEN)
-			return -1;
-		memcpy(eui, dev->dev_addr + 12, 8);
-		eui[0] |= 2;
-		return 0;
+		return addrconf_ifid_infiniband(eui, dev);
 	}
 	return -1;
 }
@@ -1376,34 +1401,9 @@ static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
 static int __ipv6_regen_rndid(struct inet6_dev *idev)
 {
-	struct net_device *dev;
-	struct scatterlist sg[2];
-
-	sg_set_buf(&sg[0], idev->entropy, 8);
-	sg_set_buf(&sg[1], idev->work_eui64, 8);
-
-	dev = idev->dev;
-
-	if (ipv6_generate_eui64(idev->work_eui64, dev)) {
-		printk(KERN_INFO
-			"__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
-			idev);
-		get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
-	}
 regen:
-	spin_lock(&md5_tfm_lock);
-	if (unlikely(md5_tfm == NULL)) {
-		spin_unlock(&md5_tfm_lock);
-		return -1;
-	}
-	crypto_digest_init(md5_tfm);
-	crypto_digest_update(md5_tfm, sg, 2);
-	crypto_digest_final(md5_tfm, idev->work_digest);
-	spin_unlock(&md5_tfm_lock);
-
-	memcpy(idev->rndid, &idev->work_digest[0], 8);
+	get_random_bytes(idev->rndid, sizeof(idev->rndid));
 	idev->rndid[0] &= ~0x02;
-	memcpy(idev->entropy, &idev->work_digest[8], 8);
 
 	/*
 	 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
@@ -2143,7 +2143,6 @@ static void addrconf_ip6_tnl_config(struct net_device *dev)
 		return;
 	}
 	ip6_tnl_add_linklocal(idev);
-	addrconf_add_mroute(dev);
 }
 
 static int addrconf_notify(struct notifier_block *this, unsigned long event, 
@@ -2668,11 +2667,10 @@ static int if6_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 
 	if (!s)
 		goto out;
-	memset(s, 0, sizeof(*s));
 
 	rc = seq_open(file, &if6_seq_ops);
 	if (rc)
@@ -3133,6 +3131,15 @@ static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
 	array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
 #endif
 	array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
+	array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
+	array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
+#ifdef CONFIG_IPV6_ROUTER_PREF
+	array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
+	array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
+#ifdef CONFIV_IPV6_ROUTE_INFO
+	array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
+#endif
+#endif
 }
 
 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 
@@ -3586,6 +3593,51 @@ static struct addrconf_sysctl_table
 			.proc_handler	=	&proc_dointvec,
 		},
 		{
+			.ctl_name	=	NET_IPV6_ACCEPT_RA_DEFRTR,
+			.procname	=	"accept_ra_defrtr",
+         		.data		=	&ipv6_devconf.accept_ra_defrtr,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_ACCEPT_RA_PINFO,
+			.procname	=	"accept_ra_pinfo",
+         		.data		=	&ipv6_devconf.accept_ra_pinfo,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+#ifdef CONFIG_IPV6_ROUTER_PREF
+		{
+			.ctl_name	=	NET_IPV6_ACCEPT_RA_RTR_PREF,
+			.procname	=	"accept_ra_rtr_pref",
+			.data		=	&ipv6_devconf.accept_ra_rtr_pref,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+			.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_RTR_PROBE_INTERVAL,
+			.procname	=	"router_probe_interval",
+			.data		=	&ipv6_devconf.rtr_probe_interval,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+			.proc_handler	=	&proc_dointvec_jiffies,
+			.strategy	=	&sysctl_jiffies,
+		},
+#ifdef CONFIV_IPV6_ROUTE_INFO
+		{
+			.ctl_name	=	NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
+			.procname	=	"accept_ra_rt_info_max_plen",
+			.data		=	&ipv6_devconf.accept_ra_rt_info_max_plen,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+			.proc_handler	=	&proc_dointvec,
+		},
+#endif
+#endif
+		{
 			.ctl_name	=	0,	/* sentinel */
 		}
 	},
@@ -3715,12 +3767,12 @@ static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
 
 int register_inet6addr_notifier(struct notifier_block *nb)
 {
-        return notifier_chain_register(&inet6addr_chain, nb);
+        return atomic_notifier_chain_register(&inet6addr_chain, nb);
 }
 
 int unregister_inet6addr_notifier(struct notifier_block *nb)
 {
-        return notifier_chain_unregister(&inet6addr_chain,nb);
+        return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
 }
 
 /*
@@ -3760,13 +3812,6 @@ int __init addrconf_init(void)
 
 	register_netdevice_notifier(&ipv6_dev_notf);
 
-#ifdef CONFIG_IPV6_PRIVACY
-	md5_tfm = crypto_alloc_tfm("md5", 0);
-	if (unlikely(md5_tfm == NULL))
-		printk(KERN_WARNING
-			"failed to load transform for md5\n");
-#endif
-
 	addrconf_verify(0);
 	rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
 #ifdef CONFIG_SYSCTL
@@ -3829,11 +3874,6 @@ void __exit addrconf_cleanup(void)
 
 	rtnl_unlock();
 
-#ifdef CONFIG_IPV6_PRIVACY
-	crypto_free_tfm(md5_tfm);
-	md5_tfm = NULL;
-#endif
-
 #ifdef CONFIG_PROC_FS
 	proc_net_remove("if_inet6");
 #endif