3 files changed, 71 insertions, 76 deletions

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 6dab883a08dd..47d7dfd9ad09 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -81,8 +81,8 @@ static struct mpls_route *mpls_route_input_rcu(struct net *net, unsigned index)
 
 	if (index < net->mpls.platform_labels) {
 		struct mpls_route __rcu **platform_label =
-			rcu_dereference(net->mpls.platform_label);
-		rt = rcu_dereference(platform_label[index]);
+			rcu_dereference_rtnl(net->mpls.platform_label);
+		rt = rcu_dereference_rtnl(platform_label[index]);
 	}
 	return rt;
 }
@@ -594,7 +594,7 @@ static struct net_device *inet_fib_lookup_dev(struct net *net,
 	struct in_addr daddr;
 
 	memcpy(&daddr, addr, sizeof(struct in_addr));
-	rt = ip_route_output(net, daddr.s_addr, 0, 0, 0);
+	rt = ip_route_output(net, daddr.s_addr, 0, 0, 0, RT_SCOPE_UNIVERSE);
 	if (IS_ERR(rt))
 		return ERR_CAST(rt);
 
@@ -1154,7 +1154,7 @@ static int mpls_netconf_fill_devconf(struct sk_buff *skb, struct mpls_dev *mdev,
 
 	if ((all || type == NETCONFA_INPUT) &&
 	    nla_put_s32(skb, NETCONFA_INPUT,
-			mdev->input_enabled) < 0)
+			READ_ONCE(mdev->input_enabled)) < 0)
 		goto nla_put_failure;
 
 	nlmsg_end(skb, nlh);
@@ -1201,8 +1201,7 @@ static void mpls_netconf_notify_devconf(struct net *net, int event,
 	rtnl_notify(skb, net, 0, RTNLGRP_MPLS_NETCONF, NULL, GFP_KERNEL);
 	return;
 errout:
-	if (err < 0)
-		rtnl_set_sk_err(net, RTNLGRP_MPLS_NETCONF, err);
+	rtnl_set_sk_err(net, RTNLGRP_MPLS_NETCONF, err);
 }
 
 static const struct nla_policy devconf_mpls_policy[NETCONFA_MAX + 1] = {
@@ -1303,11 +1302,12 @@ static int mpls_netconf_dump_devconf(struct sk_buff *skb,
 {
 	const struct nlmsghdr *nlh = cb->nlh;
 	struct net *net = sock_net(skb->sk);
-	struct hlist_head *head;
+	struct {
+		unsigned long ifindex;
+	} *ctx = (void *)cb->ctx;
 	struct net_device *dev;
 	struct mpls_dev *mdev;
-	int idx, s_idx;
-	int h, s_h;
+	int err = 0;
 
 	if (cb->strict_check) {
 		struct netlink_ext_ack *extack = cb->extack;
@@ -1324,46 +1324,29 @@ static int mpls_netconf_dump_devconf(struct sk_buff *skb,
 		}
 	}
 
-	s_h = cb->args[0];
-	s_idx = idx = cb->args[1];
-
-	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
-		idx = 0;
-		head = &net->dev_index_head[h];
-		rcu_read_lock();
-		cb->seq = net->dev_base_seq;
-		hlist_for_each_entry_rcu(dev, head, index_hlist) {
-			if (idx < s_idx)
-				goto cont;
-			mdev = mpls_dev_get(dev);
-			if (!mdev)
-				goto cont;
-			if (mpls_netconf_fill_devconf(skb, mdev,
-						      NETLINK_CB(cb->skb).portid,
-						      nlh->nlmsg_seq,
-						      RTM_NEWNETCONF,
-						      NLM_F_MULTI,
-						      NETCONFA_ALL) < 0) {
-				rcu_read_unlock();
-				goto done;
-			}
-			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
-cont:
-			idx++;
-		}
-		rcu_read_unlock();
+	rcu_read_lock();
+	for_each_netdev_dump(net, dev, ctx->ifindex) {
+		mdev = mpls_dev_get(dev);
+		if (!mdev)
+			continue;
+		err = mpls_netconf_fill_devconf(skb, mdev,
+						NETLINK_CB(cb->skb).portid,
+						nlh->nlmsg_seq,
+						RTM_NEWNETCONF,
+						NLM_F_MULTI,
+						NETCONFA_ALL);
+		if (err < 0)
+			break;
 	}
-done:
-	cb->args[0] = h;
-	cb->args[1] = idx;
+	rcu_read_unlock();
 
-	return skb->len;
+	return err;
 }
 
 #define MPLS_PERDEV_SYSCTL_OFFSET(field)	\
 	(&((struct mpls_dev *)0)->field)
 
-static int mpls_conf_proc(struct ctl_table *ctl, int write,
+static int mpls_conf_proc(const struct ctl_table *ctl, int write,
 			  void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int oval = *(int *)ctl->data;
@@ -1393,13 +1376,13 @@ static const struct ctl_table mpls_dev_table[] = {
 		.proc_handler	= mpls_conf_proc,
 		.data		= MPLS_PERDEV_SYSCTL_OFFSET(input_enabled),
 	},
-	{ }
 };
 
 static int mpls_dev_sysctl_register(struct net_device *dev,
 				    struct mpls_dev *mdev)
 {
 	char path[sizeof("net/mpls/conf/") + IFNAMSIZ];
+	size_t table_size = ARRAY_SIZE(mpls_dev_table);
 	struct net *net = dev_net(dev);
 	struct ctl_table *table;
 	int i;
@@ -1411,7 +1394,7 @@ static int mpls_dev_sysctl_register(struct net_device *dev,
 	/* Table data contains only offsets relative to the base of
 	 * the mdev at this point, so make them absolute.
 	 */
-	for (i = 0; i < ARRAY_SIZE(mpls_dev_table); i++) {
+	for (i = 0; i < table_size; i++) {
 		table[i].data = (char *)mdev + (uintptr_t)table[i].data;
 		table[i].extra1 = mdev;
 		table[i].extra2 = net;
@@ -1419,8 +1402,7 @@ static int mpls_dev_sysctl_register(struct net_device *dev,
 
 	snprintf(path, sizeof(path), "net/mpls/conf/%s", dev->name);
 
-	mdev->sysctl = register_net_sysctl_sz(net, path, table,
-					      ARRAY_SIZE(mpls_dev_table));
+	mdev->sysctl = register_net_sysctl_sz(net, path, table, table_size);
 	if (!mdev->sysctl)
 		goto free;
 
@@ -1438,7 +1420,7 @@ static void mpls_dev_sysctl_unregister(struct net_device *dev,
 				       struct mpls_dev *mdev)
 {
 	struct net *net = dev_net(dev);
-	struct ctl_table *table;
+	const struct ctl_table *table;
 
 	if (!mdev->sysctl)
 		return;
@@ -1682,7 +1664,7 @@ static int nla_put_via(struct sk_buff *skb,
 		       u8 table, const void *addr, int alen)
 {
 	static const int table_to_family[NEIGH_NR_TABLES + 1] = {
-		AF_INET, AF_INET6, AF_DECnet, AF_PACKET,
+		AF_INET, AF_INET6, AF_PACKET,
 	};
 	struct nlattr *nla;
 	struct rtvia *via;
@@ -2113,12 +2095,12 @@ static int mpls_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
 	struct rtmsg *rtm;
 	int err, i;
 
-	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) {
+	rtm = nlmsg_payload(nlh, sizeof(*rtm));
+	if (!rtm) {
 		NL_SET_ERR_MSG_MOD(extack, "Invalid header for FIB dump request");
 		return -EINVAL;
 	}
 
-	rtm = nlmsg_data(nlh);
 	if (rtm->rtm_dst_len || rtm->rtm_src_len  || rtm->rtm_tos   ||
 	    rtm->rtm_table   || rtm->rtm_scope    || rtm->rtm_type  ||
 	    rtm->rtm_flags) {
@@ -2295,8 +2277,7 @@ static void rtmsg_lfib(int event, u32 label, struct mpls_route *rt,
 
 	return;
 errout:
-	if (err < 0)
-		rtnl_set_sk_err(net, RTNLGRP_MPLS_ROUTE, err);
+	rtnl_set_sk_err(net, RTNLGRP_MPLS_ROUTE, err);
 }
 
 static int mpls_valid_getroute_req(struct sk_buff *skb,
@@ -2307,7 +2288,8 @@ static int mpls_valid_getroute_req(struct sk_buff *skb,
 	struct rtmsg *rtm;
 	int i, err;
 
-	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) {
+	rtm = nlmsg_payload(nlh, sizeof(*rtm));
+	if (!rtm) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Invalid header for get route request");
 		return -EINVAL;
@@ -2317,7 +2299,6 @@ static int mpls_valid_getroute_req(struct sk_buff *skb,
 		return nlmsg_parse_deprecated(nlh, sizeof(*rtm), tb, RTA_MAX,
 					      rtm_mpls_policy, extack);
 
-	rtm = nlmsg_data(nlh);
 	if ((rtm->rtm_dst_len && rtm->rtm_dst_len != 20) ||
 	    rtm->rtm_src_len || rtm->rtm_tos || rtm->rtm_table ||
 	    rtm->rtm_protocol || rtm->rtm_scope || rtm->rtm_type) {
@@ -2617,7 +2598,7 @@ nolabels:
 	return -ENOMEM;
 }
 
-static int mpls_platform_labels(struct ctl_table *table, int write,
+static int mpls_platform_labels(const struct ctl_table *table, int write,
 				void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = table->data;
@@ -2669,11 +2650,11 @@ static const struct ctl_table mpls_table[] = {
 		.extra1		= SYSCTL_ONE,
 		.extra2		= &ttl_max,
 	},
-	{ }
 };
 
 static int mpls_net_init(struct net *net)
 {
+	size_t table_size = ARRAY_SIZE(mpls_table);
 	struct ctl_table *table;
 	int i;
 
@@ -2689,11 +2670,11 @@ static int mpls_net_init(struct net *net)
 	/* Table data contains only offsets relative to the base of
 	 * the mdev at this point, so make them absolute.
 	 */
-	for (i = 0; i < ARRAY_SIZE(mpls_table) - 1; i++)
+	for (i = 0; i < table_size; i++)
 		table[i].data = (char *)net + (uintptr_t)table[i].data;
 
 	net->mpls.ctl = register_net_sysctl_sz(net, "net/mpls", table,
-					       ARRAY_SIZE(mpls_table));
+					       table_size);
 	if (net->mpls.ctl == NULL) {
 		kfree(table);
 		return -ENOMEM;
@@ -2706,7 +2687,7 @@ static void mpls_net_exit(struct net *net)
 {
 	struct mpls_route __rcu **platform_label;
 	size_t platform_labels;
-	struct ctl_table *table;
+	const struct ctl_table *table;
 	unsigned int index;
 
 	table = net->mpls.ctl->ctl_table_arg;
@@ -2747,6 +2728,15 @@ static struct rtnl_af_ops mpls_af_ops __read_mostly = {
 	.get_stats_af_size = mpls_get_stats_af_size,
 };
 
+static const struct rtnl_msg_handler mpls_rtnl_msg_handlers[] __initdata_or_module = {
+	{THIS_MODULE, PF_MPLS, RTM_NEWROUTE, mpls_rtm_newroute, NULL, 0},
+	{THIS_MODULE, PF_MPLS, RTM_DELROUTE, mpls_rtm_delroute, NULL, 0},
+	{THIS_MODULE, PF_MPLS, RTM_GETROUTE, mpls_getroute, mpls_dump_routes, 0},
+	{THIS_MODULE, PF_MPLS, RTM_GETNETCONF,
+	 mpls_netconf_get_devconf, mpls_netconf_dump_devconf,
+	 RTNL_FLAG_DUMP_UNLOCKED},
+};
+
 static int __init mpls_init(void)
 {
 	int err;
@@ -2763,25 +2753,30 @@ static int __init mpls_init(void)
 
 	dev_add_pack(&mpls_packet_type);
 
-	rtnl_af_register(&mpls_af_ops);
-
-	rtnl_register_module(THIS_MODULE, PF_MPLS, RTM_NEWROUTE,
-			     mpls_rtm_newroute, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_MPLS, RTM_DELROUTE,
-			     mpls_rtm_delroute, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_MPLS, RTM_GETROUTE,
-			     mpls_getroute, mpls_dump_routes, 0);
-	rtnl_register_module(THIS_MODULE, PF_MPLS, RTM_GETNETCONF,
-			     mpls_netconf_get_devconf,
-			     mpls_netconf_dump_devconf, 0);
-	err = ipgre_tunnel_encap_add_mpls_ops();
+	err = rtnl_af_register(&mpls_af_ops);
+	if (err)
+		goto out_unregister_dev_type;
+
+	err = rtnl_register_many(mpls_rtnl_msg_handlers);
 	if (err)
+		goto out_unregister_rtnl_af;
+
+	err = ipgre_tunnel_encap_add_mpls_ops();
+	if (err) {
 		pr_err("Can't add mpls over gre tunnel ops\n");
+		goto out_unregister_rtnl;
+	}
 
 	err = 0;
 out:
 	return err;
 
+out_unregister_rtnl:
+	rtnl_unregister_many(mpls_rtnl_msg_handlers);
+out_unregister_rtnl_af:
+	rtnl_af_unregister(&mpls_af_ops);
+out_unregister_dev_type:
+	dev_remove_pack(&mpls_packet_type);
 out_unregister_pernet:
 	unregister_pernet_subsys(&mpls_net_ops);
 	goto out;
diff --git a/net/mpls/internal.h b/net/mpls/internal.h
index b9f492ddf93b..83c629529b57 100644
--- a/net/mpls/internal.h
+++ b/net/mpls/internal.h
@@ -33,7 +33,7 @@ struct mpls_dev {
 
 #define MPLS_INC_STATS_LEN(mdev, len, pkts_field, bytes_field)		\
 	do {								\
-		__typeof__(*(mdev)->stats) *ptr =			\
+		TYPEOF_UNQUAL(*(mdev)->stats) *ptr =			\
 			raw_cpu_ptr((mdev)->stats);			\
 		local_bh_disable();					\
 		u64_stats_update_begin(&ptr->syncp);			\
@@ -45,7 +45,7 @@ struct mpls_dev {
 
 #define MPLS_INC_STATS(mdev, field)					\
 	do {								\
-		__typeof__(*(mdev)->stats) *ptr =			\
+		TYPEOF_UNQUAL(*(mdev)->stats) *ptr =			\
 			raw_cpu_ptr((mdev)->stats);			\
 		local_bh_disable();					\
 		u64_stats_update_begin(&ptr->syncp);			\
diff --git a/net/mpls/mpls_iptunnel.c b/net/mpls/mpls_iptunnel.c
index 8fc790f2a01b..6e73da94af7f 100644
--- a/net/mpls/mpls_iptunnel.c
+++ b/net/mpls/mpls_iptunnel.c
@@ -81,7 +81,7 @@ static int mpls_xmit(struct sk_buff *skb)
 			ttl = net->mpls.default_ttl;
 		else
 			ttl = ip_hdr(skb)->ttl;
-		rt = (struct rtable *)dst;
+		rt = dst_rtable(dst);
 	} else if (dst->ops->family == AF_INET6) {
 		if (tun_encap_info->ttl_propagate == MPLS_TTL_PROP_DISABLED)
 			ttl = tun_encap_info->default_ttl;
@@ -90,7 +90,7 @@ static int mpls_xmit(struct sk_buff *skb)
 			ttl = net->mpls.default_ttl;
 		else
 			ttl = ipv6_hdr(skb)->hop_limit;
-		rt6 = (struct rt6_info *)dst;
+		rt6 = dst_rt6_info(dst);
 	} else {
 		goto drop;
 	}
@@ -106,7 +106,7 @@ static int mpls_xmit(struct sk_buff *skb)
 		hh_len = 0;
 
 	/* Ensure there is enough space for the headers in the skb */
-	if (skb_cow(skb, hh_len + new_header_size))
+	if (skb_cow_head(skb, hh_len + new_header_size))
 		goto drop;
 
 	skb_set_inner_protocol(skb, skb->protocol);