Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 6248 insertions, 0 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
new file mode 100644
index 000000000..7cf1e42d7
--- /dev/null
+++ b/net/core/rtnetlink.c
@@ -0,0 +1,6248 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Routing netlink socket interface: protocol independent part.
+ *
+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ *	Fixes:
+ *	Vitaly E. Lavrov		RTA_OK arithmetic was wrong.
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/capability.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/security.h>
+#include <linux/mutex.h>
+#include <linux/if_addr.h>
+#include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+#include <linux/bpf.h>
+
+#include <linux/uaccess.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <net/ip.h>
+#include <net/protocol.h>
+#include <net/arp.h>
+#include <net/route.h>
+#include <net/udp.h>
+#include <net/tcp.h>
+#include <net/sock.h>
+#include <net/pkt_sched.h>
+#include <net/fib_rules.h>
+#include <net/rtnetlink.h>
+#include <net/net_namespace.h>
+
+#include "dev.h"
+
+#define RTNL_MAX_TYPE		50
+#define RTNL_SLAVE_MAX_TYPE	40
+
+struct rtnl_link {
+	rtnl_doit_func		doit;
+	rtnl_dumpit_func	dumpit;
+	struct module		*owner;
+	unsigned int		flags;
+	struct rcu_head		rcu;
+};
+
+static DEFINE_MUTEX(rtnl_mutex);
+
+void rtnl_lock(void)
+{
+	mutex_lock(&rtnl_mutex);
+}
+EXPORT_SYMBOL(rtnl_lock);
+
+int rtnl_lock_killable(void)
+{
+	return mutex_lock_killable(&rtnl_mutex);
+}
+EXPORT_SYMBOL(rtnl_lock_killable);
+
+static struct sk_buff *defer_kfree_skb_list;
+void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
+{
+	if (head && tail) {
+		tail->next = defer_kfree_skb_list;
+		defer_kfree_skb_list = head;
+	}
+}
+EXPORT_SYMBOL(rtnl_kfree_skbs);
+
+void __rtnl_unlock(void)
+{
+	struct sk_buff *head = defer_kfree_skb_list;
+
+	defer_kfree_skb_list = NULL;
+
+	/* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
+	 * is used. In some places, e.g. in cfg80211, we have code that will do
+	 * something like
+	 *   rtnl_lock()
+	 *   wiphy_lock()
+	 *   ...
+	 *   rtnl_unlock()
+	 *
+	 * and because netdev_run_todo() acquires the RTNL for items on the list
+	 * we could cause a situation such as this:
+	 * Thread 1			Thread 2
+	 *				  rtnl_lock()
+	 *				  unregister_netdevice()
+	 *				  __rtnl_unlock()
+	 * rtnl_lock()
+	 * wiphy_lock()
+	 * rtnl_unlock()
+	 *   netdev_run_todo()
+	 *     __rtnl_unlock()
+	 *
+	 *     // list not empty now
+	 *     // because of thread 2
+	 *				  rtnl_lock()
+	 *     while (!list_empty(...))
+	 *       rtnl_lock()
+	 *				  wiphy_lock()
+	 * **** DEADLOCK ****
+	 *
+	 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
+	 * it's not used in cases where something is added to do the list.
+	 */
+	WARN_ON(!list_empty(&net_todo_list));
+
+	mutex_unlock(&rtnl_mutex);
+
+	while (head) {
+		struct sk_buff *next = head->next;
+
+		kfree_skb(head);
+		cond_resched();
+		head = next;
+	}
+}
+
+void rtnl_unlock(void)
+{
+	/* This fellow will unlock it for us. */
+	netdev_run_todo();
+}
+EXPORT_SYMBOL(rtnl_unlock);
+
+int rtnl_trylock(void)
+{
+	return mutex_trylock(&rtnl_mutex);
+}
+EXPORT_SYMBOL(rtnl_trylock);
+
+int rtnl_is_locked(void)
+{
+	return mutex_is_locked(&rtnl_mutex);
+}
+EXPORT_SYMBOL(rtnl_is_locked);
+
+bool refcount_dec_and_rtnl_lock(refcount_t *r)
+{
+	return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
+}
+EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
+
+#ifdef CONFIG_PROVE_LOCKING
+bool lockdep_rtnl_is_held(void)
+{
+	return lockdep_is_held(&rtnl_mutex);
+}
+EXPORT_SYMBOL(lockdep_rtnl_is_held);
+#endif /* #ifdef CONFIG_PROVE_LOCKING */
+
+static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
+
+static inline int rtm_msgindex(int msgtype)
+{
+	int msgindex = msgtype - RTM_BASE;
+
+	/*
+	 * msgindex < 0 implies someone tried to register a netlink
+	 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
+	 * the message type has not been added to linux/rtnetlink.h
+	 */
+	BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
+
+	return msgindex;
+}
+
+static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
+{
+	struct rtnl_link __rcu **tab;
+
+	if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
+		protocol = PF_UNSPEC;
+
+	tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
+	if (!tab)
+		tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
+
+	return rcu_dereference_rtnl(tab[msgtype]);
+}
+
+static int rtnl_register_internal(struct module *owner,
+				  int protocol, int msgtype,
+				  rtnl_doit_func doit, rtnl_dumpit_func dumpit,
+				  unsigned int flags)
+{
+	struct rtnl_link *link, *old;
+	struct rtnl_link __rcu **tab;
+	int msgindex;
+	int ret = -ENOBUFS;
+
+	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
+	msgindex = rtm_msgindex(msgtype);
+
+	rtnl_lock();
+	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
+	if (tab == NULL) {
+		tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
+		if (!tab)
+			goto unlock;
+
+		/* ensures we see the 0 stores */
+		rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
+	}
+
+	old = rtnl_dereference(tab[msgindex]);
+	if (old) {
+		link = kmemdup(old, sizeof(*old), GFP_KERNEL);
+		if (!link)
+			goto unlock;
+	} else {
+		link = kzalloc(sizeof(*link), GFP_KERNEL);
+		if (!link)
+			goto unlock;
+	}
+
+	WARN_ON(link->owner && link->owner != owner);
+	link->owner = owner;
+
+	WARN_ON(doit && link->doit && link->doit != doit);
+	if (doit)
+		link->doit = doit;
+	WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
+	if (dumpit)
+		link->dumpit = dumpit;
+
+	WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
+		(flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
+	link->flags |= flags;
+
+	/* publish protocol:msgtype */
+	rcu_assign_pointer(tab[msgindex], link);
+	ret = 0;
+	if (old)
+		kfree_rcu(old, rcu);
+unlock:
+	rtnl_unlock();
+	return ret;
+}
+
+/**
+ * rtnl_register_module - Register a rtnetlink message type
+ *
+ * @owner: module registering the hook (THIS_MODULE)
+ * @protocol: Protocol family or PF_UNSPEC
+ * @msgtype: rtnetlink message type
+ * @doit: Function pointer called for each request message
+ * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
+ * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
+ *
+ * Like rtnl_register, but for use by removable modules.
+ */
+int rtnl_register_module(struct module *owner,
+			 int protocol, int msgtype,
+			 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
+			 unsigned int flags)
+{
+	return rtnl_register_internal(owner, protocol, msgtype,
+				      doit, dumpit, flags);
+}
+EXPORT_SYMBOL_GPL(rtnl_register_module);
+
+/**
+ * rtnl_register - Register a rtnetlink message type
+ * @protocol: Protocol family or PF_UNSPEC
+ * @msgtype: rtnetlink message type
+ * @doit: Function pointer called for each request message
+ * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
+ * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
+ *
+ * Registers the specified function pointers (at least one of them has
+ * to be non-NULL) to be called whenever a request message for the
+ * specified protocol family and message type is received.
+ *
+ * The special protocol family PF_UNSPEC may be used to define fallback
+ * function pointers for the case when no entry for the specific protocol
+ * family exists.
+ */
+void rtnl_register(int protocol, int msgtype,
+		   rtnl_doit_func doit, rtnl_dumpit_func dumpit,
+		   unsigned int flags)
+{
+	int err;
+
+	err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
+				     flags);
+	if (err)
+		pr_err("Unable to register rtnetlink message handler, "
+		       "protocol = %d, message type = %d\n", protocol, msgtype);
+}
+
+/**
+ * rtnl_unregister - Unregister a rtnetlink message type
+ * @protocol: Protocol family or PF_UNSPEC
+ * @msgtype: rtnetlink message type
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int rtnl_unregister(int protocol, int msgtype)
+{
+	struct rtnl_link __rcu **tab;
+	struct rtnl_link *link;
+	int msgindex;
+
+	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
+	msgindex = rtm_msgindex(msgtype);
+
+	rtnl_lock();
+	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
+	if (!tab) {
+		rtnl_unlock();
+		return -ENOENT;
+	}
+
+	link = rtnl_dereference(tab[msgindex]);
+	RCU_INIT_POINTER(tab[msgindex], NULL);
+	rtnl_unlock();
+
+	kfree_rcu(link, rcu);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rtnl_unregister);
+
+/**
+ * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
+ * @protocol : Protocol family or PF_UNSPEC
+ *
+ * Identical to calling rtnl_unregster() for all registered message types
+ * of a certain protocol family.
+ */
+void rtnl_unregister_all(int protocol)
+{
+	struct rtnl_link __rcu **tab;
+	struct rtnl_link *link;
+	int msgindex;
+
+	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
+
+	rtnl_lock();
+	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
+	if (!tab) {
+		rtnl_unlock();
+		return;
+	}
+	RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
+	for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
+		link = rtnl_dereference(tab[msgindex]);
+		if (!link)
+			continue;
+
+		RCU_INIT_POINTER(tab[msgindex], NULL);
+		kfree_rcu(link, rcu);
+	}
+	rtnl_unlock();
+
+	synchronize_net();
+
+	kfree(tab);
+}
+EXPORT_SYMBOL_GPL(rtnl_unregister_all);
+
+static LIST_HEAD(link_ops);
+
+static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
+{
+	const struct rtnl_link_ops *ops;
+
+	list_for_each_entry(ops, &link_ops, list) {
+		if (!strcmp(ops->kind, kind))
+			return ops;
+	}
+	return NULL;
+}
+
+/**
+ * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
+ * @ops: struct rtnl_link_ops * to register
+ *
+ * The caller must hold the rtnl_mutex. This function should be used
+ * by drivers that create devices during module initialization. It
+ * must be called before registering the devices.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int __rtnl_link_register(struct rtnl_link_ops *ops)
+{
+	if (rtnl_link_ops_get(ops->kind))
+		return -EEXIST;
+
+	/* The check for alloc/setup is here because if ops
+	 * does not have that filled up, it is not possible
+	 * to use the ops for creating device. So do not
+	 * fill up dellink as well. That disables rtnl_dellink.
+	 */
+	if ((ops->alloc || ops->setup) && !ops->dellink)
+		ops->dellink = unregister_netdevice_queue;
+
+	list_add_tail(&ops->list, &link_ops);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__rtnl_link_register);
+
+/**
+ * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
+ * @ops: struct rtnl_link_ops * to register
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int rtnl_link_register(struct rtnl_link_ops *ops)
+{
+	int err;
+
+	/* Sanity-check max sizes to avoid stack buffer overflow. */
+	if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
+		    ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
+		return -EINVAL;
+
+	rtnl_lock();
+	err = __rtnl_link_register(ops);
+	rtnl_unlock();
+	return err;
+}
+EXPORT_SYMBOL_GPL(rtnl_link_register);
+
+static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
+{
+	struct net_device *dev;
+	LIST_HEAD(list_kill);
+
+	for_each_netdev(net, dev) {
+		if (dev->rtnl_link_ops == ops)
+			ops->dellink(dev, &list_kill);
+	}
+	unregister_netdevice_many(&list_kill);
+}
+
+/**
+ * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
+ * @ops: struct rtnl_link_ops * to unregister
+ *
+ * The caller must hold the rtnl_mutex and guarantee net_namespace_list
+ * integrity (hold pernet_ops_rwsem for writing to close the race
+ * with setup_net() and cleanup_net()).
+ */
+void __rtnl_link_unregister(struct rtnl_link_ops *ops)
+{
+	struct net *net;
+
+	for_each_net(net) {
+		__rtnl_kill_links(net, ops);
+	}
+	list_del(&ops->list);
+}
+EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
+
+/* Return with the rtnl_lock held when there are no network
+ * devices unregistering in any network namespace.
+ */
+static void rtnl_lock_unregistering_all(void)
+{
+	struct net *net;
+	bool unregistering;
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+
+	add_wait_queue(&netdev_unregistering_wq, &wait);
+	for (;;) {
+		unregistering = false;
+		rtnl_lock();
+		/* We held write locked pernet_ops_rwsem, and parallel
+		 * setup_net() and cleanup_net() are not possible.
+		 */
+		for_each_net(net) {
+			if (atomic_read(&net->dev_unreg_count) > 0) {
+				unregistering = true;
+				break;
+			}
+		}
+		if (!unregistering)
+			break;
+		__rtnl_unlock();
+
+		wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
+	}
+	remove_wait_queue(&netdev_unregistering_wq, &wait);
+}
+
+/**
+ * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
+ * @ops: struct rtnl_link_ops * to unregister
+ */
+void rtnl_link_unregister(struct rtnl_link_ops *ops)
+{
+	/* Close the race with setup_net() and cleanup_net() */
+	down_write(&pernet_ops_rwsem);
+	rtnl_lock_unregistering_all();
+	__rtnl_link_unregister(ops);
+	rtnl_unlock();
+	up_write(&pernet_ops_rwsem);
+}
+EXPORT_SYMBOL_GPL(rtnl_link_unregister);
+
+static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
+{
+	struct net_device *master_dev;
+	const struct rtnl_link_ops *ops;
+	size_t size = 0;
+
+	rcu_read_lock();
+
+	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
+	if (!master_dev)
+		goto out;
+
+	ops = master_dev->rtnl_link_ops;
+	if (!ops || !ops->get_slave_size)
+		goto out;
+	/* IFLA_INFO_SLAVE_DATA + nested data */
+	size = nla_total_size(sizeof(struct nlattr)) +
+	       ops->get_slave_size(master_dev, dev);
+
+out:
+	rcu_read_unlock();
+	return size;
+}
+
+static size_t rtnl_link_get_size(const struct net_device *dev)
+{
+	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+	size_t size;
+
+	if (!ops)
+		return 0;
+
+	size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
+	       nla_total_size(strlen(ops->kind) + 1);  /* IFLA_INFO_KIND */
+
+	if (ops->get_size)
+		/* IFLA_INFO_DATA + nested data */
+		size += nla_total_size(sizeof(struct nlattr)) +
+			ops->get_size(dev);
+
+	if (ops->get_xstats_size)
+		/* IFLA_INFO_XSTATS */
+		size += nla_total_size(ops->get_xstats_size(dev));
+
+	size += rtnl_link_get_slave_info_data_size(dev);
+
+	return size;
+}
+
+static LIST_HEAD(rtnl_af_ops);
+
+static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
+{
+	const struct rtnl_af_ops *ops;
+
+	ASSERT_RTNL();
+
+	list_for_each_entry(ops, &rtnl_af_ops, list) {
+		if (ops->family == family)
+			return ops;
+	}
+
+	return NULL;
+}
+
+/**
+ * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
+ * @ops: struct rtnl_af_ops * to register
+ *
+ * Returns 0 on success or a negative error code.
+ */
+void rtnl_af_register(struct rtnl_af_ops *ops)
+{
+	rtnl_lock();
+	list_add_tail_rcu(&ops->list, &rtnl_af_ops);
+	rtnl_unlock();
+}
+EXPORT_SYMBOL_GPL(rtnl_af_register);
+
+/**
+ * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
+ * @ops: struct rtnl_af_ops * to unregister
+ */
+void rtnl_af_unregister(struct rtnl_af_ops *ops)
+{
+	rtnl_lock();
+	list_del_rcu(&ops->list);
+	rtnl_unlock();
+
+	synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(rtnl_af_unregister);
+
+static size_t rtnl_link_get_af_size(const struct net_device *dev,
+				    u32 ext_filter_mask)
+{
+	struct rtnl_af_ops *af_ops;
+	size_t size;
+
+	/* IFLA_AF_SPEC */
+	size = nla_total_size(sizeof(struct nlattr));
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
+		if (af_ops->get_link_af_size) {
+			/* AF_* + nested data */
+			size += nla_total_size(sizeof(struct nlattr)) +
+				af_ops->get_link_af_size(dev, ext_filter_mask);
+		}
+	}
+	rcu_read_unlock();
+
+	return size;
+}
+
+static bool rtnl_have_link_slave_info(const struct net_device *dev)
+{
+	struct net_device *master_dev;
+	bool ret = false;
+
+	rcu_read_lock();
+
+	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
+	if (master_dev && master_dev->rtnl_link_ops)
+		ret = true;
+	rcu_read_unlock();
+	return ret;
+}
+
+static int rtnl_link_slave_info_fill(struct sk_buff *skb,
+				     const struct net_device *dev)
+{
+	struct net_device *master_dev;
+	const struct rtnl_link_ops *ops;
+	struct nlattr *slave_data;
+	int err;
+
+	master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
+	if (!master_dev)
+		return 0;
+	ops = master_dev->rtnl_link_ops;
+	if (!ops)
+		return 0;
+	if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
+		return -EMSGSIZE;
+	if (ops->fill_slave_info) {
+		slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
+		if (!slave_data)
+			return -EMSGSIZE;
+		err = ops->fill_slave_info(skb, master_dev, dev);
+		if (err < 0)
+			goto err_cancel_slave_data;
+		nla_nest_end(skb, slave_data);
+	}
+	return 0;
+
+err_cancel_slave_data:
+	nla_nest_cancel(skb, slave_data);
+	return err;
+}
+
+static int rtnl_link_info_fill(struct sk_buff *skb,
+			       const struct net_device *dev)
+{
+	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+	struct nlattr *data;
+	int err;
+
+	if (!ops)
+		return 0;
+	if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
+		return -EMSGSIZE;
+	if (ops->fill_xstats) {
+		err = ops->fill_xstats(skb, dev);
+		if (err < 0)
+			return err;
+	}
+	if (ops->fill_info) {
+		data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
+		if (data == NULL)
+			return -EMSGSIZE;
+		err = ops->fill_info(skb, dev);
+		if (err < 0)
+			goto err_cancel_data;
+		nla_nest_end(skb, data);
+	}
+	return 0;
+
+err_cancel_data:
+	nla_nest_cancel(skb, data);
+	return err;
+}
+
+static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
+{
+	struct nlattr *linkinfo;
+	int err = -EMSGSIZE;
+
+	linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
+	if (linkinfo == NULL)
+		goto out;
+
+	err = rtnl_link_info_fill(skb, dev);
+	if (err < 0)
+		goto err_cancel_link;
+
+	err = rtnl_link_slave_info_fill(skb, dev);
+	if (err < 0)
+		goto err_cancel_link;
+
+	nla_nest_end(skb, linkinfo);
+	return 0;
+
+err_cancel_link:
+	nla_nest_cancel(skb, linkinfo);
+out:
+	return err;
+}
+
+int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
+{
+	struct sock *rtnl = net->rtnl;
+
+	return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
+}
+
+int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
+{
+	struct sock *rtnl = net->rtnl;
+
+	return nlmsg_unicast(rtnl, skb, pid);
+}
+EXPORT_SYMBOL(rtnl_unicast);
+
+void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
+		 struct nlmsghdr *nlh, gfp_t flags)
+{
+	struct sock *rtnl = net->rtnl;
+
+	nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
+}
+EXPORT_SYMBOL(rtnl_notify);
+
+void rtnl_set_sk_err(struct net *net, u32 group, int error)
+{
+	struct sock *rtnl = net->rtnl;
+
+	netlink_set_err(rtnl, 0, group, error);
+}
+EXPORT_SYMBOL(rtnl_set_sk_err);
+
+int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
+{
+	struct nlattr *mx;
+	int i, valid = 0;
+
+	/* nothing is dumped for dst_default_metrics, so just skip the loop */
+	if (metrics == dst_default_metrics.metrics)
+		return 0;
+
+	mx = nla_nest_start_noflag(skb, RTA_METRICS);
+	if (mx == NULL)
+		return -ENOBUFS;
+
+	for (i = 0; i < RTAX_MAX; i++) {
+		if (metrics[i]) {
+			if (i == RTAX_CC_ALGO - 1) {
+				char tmp[TCP_CA_NAME_MAX], *name;
+
+				name = tcp_ca_get_name_by_key(metrics[i], tmp);
+				if (!name)
+					continue;
+				if (nla_put_string(skb, i + 1, name))
+					goto nla_put_failure;
+			} else if (i == RTAX_FEATURES - 1) {
+				u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
+
+				if (!user_features)
+					continue;
+				BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
+				if (nla_put_u32(skb, i + 1, user_features))
+					goto nla_put_failure;
+			} else {
+				if (nla_put_u32(skb, i + 1, metrics[i]))
+					goto nla_put_failure;
+			}
+			valid++;
+		}
+	}
+
+	if (!valid) {
+		nla_nest_cancel(skb, mx);
+		return 0;
+	}
+
+	return nla_nest_end(skb, mx);
+
+nla_put_failure:
+	nla_nest_cancel(skb, mx);
+	return -EMSGSIZE;
+}
+EXPORT_SYMBOL(rtnetlink_put_metrics);
+
+int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
+		       long expires, u32 error)
+{
+	struct rta_cacheinfo ci = {
+		.rta_error = error,
+		.rta_id =  id,
+	};
+
+	if (dst) {
+		ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
+		ci.rta_used = dst->__use;
+		ci.rta_clntref = atomic_read(&dst->__refcnt);
+	}
+	if (expires) {
+		unsigned long clock;
+
+		clock = jiffies_to_clock_t(abs(expires));
+		clock = min_t(unsigned long, clock, INT_MAX);
+		ci.rta_expires = (expires > 0) ? clock : -clock;
+	}
+	return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+}
+EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
+
+static void set_operstate(struct net_device *dev, unsigned char transition)
+{
+	unsigned char operstate = dev->operstate;
+
+	switch (transition) {
+	case IF_OPER_UP:
+		if ((operstate == IF_OPER_DORMANT ||
+		     operstate == IF_OPER_TESTING ||
+		     operstate == IF_OPER_UNKNOWN) &&
+		    !netif_dormant(dev) && !netif_testing(dev))
+			operstate = IF_OPER_UP;
+		break;
+
+	case IF_OPER_TESTING:
+		if (netif_oper_up(dev))
+			operstate = IF_OPER_TESTING;
+		break;
+
+	case IF_OPER_DORMANT:
+		if (netif_oper_up(dev))
+			operstate = IF_OPER_DORMANT;
+		break;
+	}
+
+	if (dev->operstate != operstate) {
+		write_lock(&dev_base_lock);
+		dev->operstate = operstate;
+		write_unlock(&dev_base_lock);
+		netdev_state_change(dev);
+	}
+}
+
+static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
+{
+	return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
+	       (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
+}
+
+static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
+					   const struct ifinfomsg *ifm)
+{
+	unsigned int flags = ifm->ifi_flags;
+
+	/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
+	if (ifm->ifi_change)
+		flags = (flags & ifm->ifi_change) |
+			(rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
+
+	return flags;
+}
+
+static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
+				 const struct rtnl_link_stats64 *b)
+{
+	a->rx_packets = b->rx_packets;
+	a->tx_packets = b->tx_packets;
+	a->rx_bytes = b->rx_bytes;
+	a->tx_bytes = b->tx_bytes;
+	a->rx_errors = b->rx_errors;
+	a->tx_errors = b->tx_errors;
+	a->rx_dropped = b->rx_dropped;
+	a->tx_dropped = b->tx_dropped;
+
+	a->multicast = b->multicast;
+	a->collisions = b->collisions;
+
+	a->rx_length_errors = b->rx_length_errors;
+	a->rx_over_errors = b->rx_over_errors;
+	a->rx_crc_errors = b->rx_crc_errors;
+	a->rx_frame_errors = b->rx_frame_errors;
+	a->rx_fifo_errors = b->rx_fifo_errors;
+	a->rx_missed_errors = b->rx_missed_errors;
+
+	a->tx_aborted_errors = b->tx_aborted_errors;
+	a->tx_carrier_errors = b->tx_carrier_errors;
+	a->tx_fifo_errors = b->tx_fifo_errors;
+	a->tx_heartbeat_errors = b->tx_heartbeat_errors;
+	a->tx_window_errors = b->tx_window_errors;
+
+	a->rx_compressed = b->rx_compressed;
+	a->tx_compressed = b->tx_compressed;
+
+	a->rx_nohandler = b->rx_nohandler;
+}
+
+/* All VF info */
+static inline int rtnl_vfinfo_size(const struct net_device *dev,
+				   u32 ext_filter_mask)
+{
+	if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
+		int num_vfs = dev_num_vf(dev->dev.parent);
+		size_t size = nla_total_size(0);
+		size += num_vfs *
+			(nla_total_size(0) +
+			 nla_total_size(sizeof(struct ifla_vf_mac)) +
+			 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
+			 nla_total_size(sizeof(struct ifla_vf_vlan)) +
+			 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
+			 nla_total_size(MAX_VLAN_LIST_LEN *
+					sizeof(struct ifla_vf_vlan_info)) +
+			 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
+			 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
+			 nla_total_size(sizeof(struct ifla_vf_rate)) +
+			 nla_total_size(sizeof(struct ifla_vf_link_state)) +
+			 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
+			 nla_total_size(sizeof(struct ifla_vf_trust)));
+		if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
+			size += num_vfs *
+				(nla_total_size(0) + /* nest IFLA_VF_STATS */
+				 /* IFLA_VF_STATS_RX_PACKETS */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_TX_PACKETS */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_RX_BYTES */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_TX_BYTES */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_BROADCAST */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_MULTICAST */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_RX_DROPPED */
+				 nla_total_size_64bit(sizeof(__u64)) +
+				 /* IFLA_VF_STATS_TX_DROPPED */
+				 nla_total_size_64bit(sizeof(__u64)));
+		}
+		return size;
+	} else
+		return 0;
+}
+
+static size_t rtnl_port_size(const struct net_device *dev,
+			     u32 ext_filter_mask)
+{
+	size_t port_size = nla_total_size(4)		/* PORT_VF */
+		+ nla_total_size(PORT_PROFILE_MAX)	/* PORT_PROFILE */
+		+ nla_total_size(PORT_UUID_MAX)		/* PORT_INSTANCE_UUID */
+		+ nla_total_size(PORT_UUID_MAX)		/* PORT_HOST_UUID */
+		+ nla_total_size(1)			/* PROT_VDP_REQUEST */
+		+ nla_total_size(2);			/* PORT_VDP_RESPONSE */
+	size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
+	size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
+		+ port_size;
+	size_t port_self_size = nla_total_size(sizeof(struct nlattr))
+		+ port_size;
+
+	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
+	    !(ext_filter_mask & RTEXT_FILTER_VF))
+		return 0;
+	if (dev_num_vf(dev->dev.parent))
+		return port_self_size + vf_ports_size +
+			vf_port_size * dev_num_vf(dev->dev.parent);
+	else
+		return port_self_size;
+}
+
+static size_t rtnl_xdp_size(void)
+{
+	size_t xdp_size = nla_total_size(0) +	/* nest IFLA_XDP */
+			  nla_total_size(1) +	/* XDP_ATTACHED */
+			  nla_total_size(4) +	/* XDP_PROG_ID (or 1st mode) */
+			  nla_total_size(4);	/* XDP_<mode>_PROG_ID */
+
+	return xdp_size;
+}
+
+static size_t rtnl_prop_list_size(const struct net_device *dev)
+{
+	struct netdev_name_node *name_node;
+	size_t size;
+
+	if (list_empty(&dev->name_node->list))
+		return 0;
+	size = nla_total_size(0);
+	list_for_each_entry(name_node, &dev->name_node->list, list)
+		size += nla_total_size(ALTIFNAMSIZ);
+	return size;
+}
+
+static size_t rtnl_proto_down_size(const struct net_device *dev)
+{
+	size_t size = nla_total_size(1);
+
+	if (dev->proto_down_reason)
+		size += nla_total_size(0) + nla_total_size(4);
+
+	return size;
+}
+
+static noinline size_t if_nlmsg_size(const struct net_device *dev,
+				     u32 ext_filter_mask)
+{
+	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+	       + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
+	       + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
+	       + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
+	       + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
+	       + nla_total_size(sizeof(struct rtnl_link_stats))
+	       + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
+	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
+	       + nla_total_size(4) /* IFLA_TXQLEN */
+	       + nla_total_size(4) /* IFLA_WEIGHT */
+	       + nla_total_size(4) /* IFLA_MTU */
+	       + nla_total_size(4) /* IFLA_LINK */
+	       + nla_total_size(4) /* IFLA_MASTER */
+	       + nla_total_size(1) /* IFLA_CARRIER */
+	       + nla_total_size(4) /* IFLA_PROMISCUITY */
+	       + nla_total_size(4) /* IFLA_ALLMULTI */
+	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
+	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
+	       + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
+	       + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
+	       + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
+	       + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
+	       + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
+	       + nla_total_size(1) /* IFLA_OPERSTATE */
+	       + nla_total_size(1) /* IFLA_LINKMODE */
+	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
+	       + nla_total_size(4) /* IFLA_LINK_NETNSID */
+	       + nla_total_size(4) /* IFLA_GROUP */
+	       + nla_total_size(ext_filter_mask
+			        & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
+	       + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
+	       + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
+	       + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
+	       + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
+	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
+	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
+	       + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
+	       + rtnl_xdp_size() /* IFLA_XDP */
+	       + nla_total_size(4)  /* IFLA_EVENT */
+	       + nla_total_size(4)  /* IFLA_NEW_NETNSID */
+	       + nla_total_size(4)  /* IFLA_NEW_IFINDEX */
+	       + rtnl_proto_down_size(dev)  /* proto down */
+	       + nla_total_size(4)  /* IFLA_TARGET_NETNSID */
+	       + nla_total_size(4)  /* IFLA_CARRIER_UP_COUNT */
+	       + nla_total_size(4)  /* IFLA_CARRIER_DOWN_COUNT */
+	       + nla_total_size(4)  /* IFLA_MIN_MTU */
+	       + nla_total_size(4)  /* IFLA_MAX_MTU */
+	       + rtnl_prop_list_size(dev)
+	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
+	       + 0;
+}
+
+static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	struct nlattr *vf_ports;
+	struct nlattr *vf_port;
+	int vf;
+	int err;
+
+	vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
+	if (!vf_ports)
+		return -EMSGSIZE;
+
+	for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
+		vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
+		if (!vf_port)
+			goto nla_put_failure;
+		if (nla_put_u32(skb, IFLA_PORT_VF, vf))
+			goto nla_put_failure;
+		err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
+		if (err == -EMSGSIZE)
+			goto nla_put_failure;
+		if (err) {
+			nla_nest_cancel(skb, vf_port);
+			continue;
+		}
+		nla_nest_end(skb, vf_port);
+	}
+
+	nla_nest_end(skb, vf_ports);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, vf_ports);
+	return -EMSGSIZE;
+}
+
+static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	struct nlattr *port_self;
+	int err;
+
+	port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
+	if (!port_self)
+		return -EMSGSIZE;
+
+	err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
+	if (err) {
+		nla_nest_cancel(skb, port_self);
+		return (err == -EMSGSIZE) ? err : 0;
+	}
+
+	nla_nest_end(skb, port_self);
+
+	return 0;
+}
+
+static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
+			  u32 ext_filter_mask)
+{
+	int err;
+
+	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
+	    !(ext_filter_mask & RTEXT_FILTER_VF))
+		return 0;
+
+	err = rtnl_port_self_fill(skb, dev);
+	if (err)
+		return err;
+
+	if (dev_num_vf(dev->dev.parent)) {
+		err = rtnl_vf_ports_fill(skb, dev);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	int err;
+	struct netdev_phys_item_id ppid;
+
+	err = dev_get_phys_port_id(dev, &ppid);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	char name[IFNAMSIZ];
+	int err;
+
+	err = dev_get_phys_port_name(dev, name, sizeof(name));
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	struct netdev_phys_item_id ppid = { };
+	int err;
+
+	err = dev_get_port_parent_id(dev, &ppid, false);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
+					      struct net_device *dev)
+{
+	struct rtnl_link_stats64 *sp;
+	struct nlattr *attr;
+
+	attr = nla_reserve_64bit(skb, IFLA_STATS64,
+				 sizeof(struct rtnl_link_stats64), IFLA_PAD);
+	if (!attr)
+		return -EMSGSIZE;
+
+	sp = nla_data(attr);
+	dev_get_stats(dev, sp);
+
+	attr = nla_reserve(skb, IFLA_STATS,
+			   sizeof(struct rtnl_link_stats));
+	if (!attr)
+		return -EMSGSIZE;
+
+	copy_rtnl_link_stats(nla_data(attr), sp);
+
+	return 0;
+}
+
+static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
+					       struct net_device *dev,
+					       int vfs_num,
+					       struct nlattr *vfinfo,
+					       u32 ext_filter_mask)
+{
+	struct ifla_vf_rss_query_en vf_rss_query_en;
+	struct nlattr *vf, *vfstats, *vfvlanlist;
+	struct ifla_vf_link_state vf_linkstate;
+	struct ifla_vf_vlan_info vf_vlan_info;
+	struct ifla_vf_spoofchk vf_spoofchk;
+	struct ifla_vf_tx_rate vf_tx_rate;
+	struct ifla_vf_stats vf_stats;
+	struct ifla_vf_trust vf_trust;
+	struct ifla_vf_vlan vf_vlan;
+	struct ifla_vf_rate vf_rate;
+	struct ifla_vf_mac vf_mac;
+	struct ifla_vf_broadcast vf_broadcast;
+	struct ifla_vf_info ivi;
+	struct ifla_vf_guid node_guid;
+	struct ifla_vf_guid port_guid;
+
+	memset(&ivi, 0, sizeof(ivi));
+
+	/* Not all SR-IOV capable drivers support the
+	 * spoofcheck and "RSS query enable" query.  Preset to
+	 * -1 so the user space tool can detect that the driver
+	 * didn't report anything.
+	 */
+	ivi.spoofchk = -1;
+	ivi.rss_query_en = -1;
+	ivi.trusted = -1;
+	/* The default value for VF link state is "auto"
+	 * IFLA_VF_LINK_STATE_AUTO which equals zero
+	 */
+	ivi.linkstate = 0;
+	/* VLAN Protocol by default is 802.1Q */
+	ivi.vlan_proto = htons(ETH_P_8021Q);
+	if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
+		return 0;
+
+	memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
+	memset(&node_guid, 0, sizeof(node_guid));
+	memset(&port_guid, 0, sizeof(port_guid));
+
+	vf_mac.vf =
+		vf_vlan.vf =
+		vf_vlan_info.vf =
+		vf_rate.vf =
+		vf_tx_rate.vf =
+		vf_spoofchk.vf =
+		vf_linkstate.vf =
+		vf_rss_query_en.vf =
+		vf_trust.vf =
+		node_guid.vf =
+		port_guid.vf = ivi.vf;
+
+	memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
+	memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
+	vf_vlan.vlan = ivi.vlan;
+	vf_vlan.qos = ivi.qos;
+	vf_vlan_info.vlan = ivi.vlan;
+	vf_vlan_info.qos = ivi.qos;
+	vf_vlan_info.vlan_proto = ivi.vlan_proto;
+	vf_tx_rate.rate = ivi.max_tx_rate;
+	vf_rate.min_tx_rate = ivi.min_tx_rate;
+	vf_rate.max_tx_rate = ivi.max_tx_rate;
+	vf_spoofchk.setting = ivi.spoofchk;
+	vf_linkstate.link_state = ivi.linkstate;
+	vf_rss_query_en.setting = ivi.rss_query_en;
+	vf_trust.setting = ivi.trusted;
+	vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
+	if (!vf)
+		goto nla_put_vfinfo_failure;
+	if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
+	    nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
+	    nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
+	    nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
+		    &vf_rate) ||
+	    nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
+		    &vf_tx_rate) ||
+	    nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
+		    &vf_spoofchk) ||
+	    nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
+		    &vf_linkstate) ||
+	    nla_put(skb, IFLA_VF_RSS_QUERY_EN,
+		    sizeof(vf_rss_query_en),
+		    &vf_rss_query_en) ||
+	    nla_put(skb, IFLA_VF_TRUST,
+		    sizeof(vf_trust), &vf_trust))
+		goto nla_put_vf_failure;
+
+	if (dev->netdev_ops->ndo_get_vf_guid &&
+	    !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
+					      &port_guid)) {
+		if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
+			    &node_guid) ||
+		    nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
+			    &port_guid))
+			goto nla_put_vf_failure;
+	}
+	vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
+	if (!vfvlanlist)
+		goto nla_put_vf_failure;
+	if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
+		    &vf_vlan_info)) {
+		nla_nest_cancel(skb, vfvlanlist);
+		goto nla_put_vf_failure;
+	}
+	nla_nest_end(skb, vfvlanlist);
+	if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
+		memset(&vf_stats, 0, sizeof(vf_stats));
+		if (dev->netdev_ops->ndo_get_vf_stats)
+			dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
+							  &vf_stats);
+		vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
+		if (!vfstats)
+			goto nla_put_vf_failure;
+		if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
+				      vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
+				      vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
+				      vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
+				      vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
+				      vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
+				      vf_stats.multicast, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
+				      vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
+		    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
+				      vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
+			nla_nest_cancel(skb, vfstats);
+			goto nla_put_vf_failure;
+		}
+		nla_nest_end(skb, vfstats);
+	}
+	nla_nest_end(skb, vf);
+	return 0;
+
+nla_put_vf_failure:
+	nla_nest_cancel(skb, vf);
+nla_put_vfinfo_failure:
+	nla_nest_cancel(skb, vfinfo);
+	return -EMSGSIZE;
+}
+
+static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
+					   struct net_device *dev,
+					   u32 ext_filter_mask)
+{
+	struct nlattr *vfinfo;
+	int i, num_vfs;
+
+	if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
+		return 0;
+
+	num_vfs = dev_num_vf(dev->dev.parent);
+	if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
+		return -EMSGSIZE;
+
+	if (!dev->netdev_ops->ndo_get_vf_config)
+		return 0;
+
+	vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
+	if (!vfinfo)
+		return -EMSGSIZE;
+
+	for (i = 0; i < num_vfs; i++) {
+		if (rtnl_fill_vfinfo(skb, dev, i, vfinfo, ext_filter_mask))
+			return -EMSGSIZE;
+	}
+
+	nla_nest_end(skb, vfinfo);
+	return 0;
+}
+
+static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
+{
+	struct rtnl_link_ifmap map;
+
+	memset(&map, 0, sizeof(map));
+	map.mem_start   = dev->mem_start;
+	map.mem_end     = dev->mem_end;
+	map.base_addr   = dev->base_addr;
+	map.irq         = dev->irq;
+	map.dma         = dev->dma;
+	map.port        = dev->if_port;
+
+	if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static u32 rtnl_xdp_prog_skb(struct net_device *dev)
+{
+	const struct bpf_prog *generic_xdp_prog;
+
+	ASSERT_RTNL();
+
+	generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
+	if (!generic_xdp_prog)
+		return 0;
+	return generic_xdp_prog->aux->id;
+}
+
+static u32 rtnl_xdp_prog_drv(struct net_device *dev)
+{
+	return dev_xdp_prog_id(dev, XDP_MODE_DRV);
+}
+
+static u32 rtnl_xdp_prog_hw(struct net_device *dev)
+{
+	return dev_xdp_prog_id(dev, XDP_MODE_HW);
+}
+
+static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
+			       u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
+			       u32 (*get_prog_id)(struct net_device *dev))
+{
+	u32 curr_id;
+	int err;
+
+	curr_id = get_prog_id(dev);
+	if (!curr_id)
+		return 0;
+
+	*prog_id = curr_id;
+	err = nla_put_u32(skb, attr, curr_id);
+	if (err)
+		return err;
+
+	if (*mode != XDP_ATTACHED_NONE)
+		*mode = XDP_ATTACHED_MULTI;
+	else
+		*mode = tgt_mode;
+
+	return 0;
+}
+
+static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	struct nlattr *xdp;
+	u32 prog_id;
+	int err;
+	u8 mode;
+
+	xdp = nla_nest_start_noflag(skb, IFLA_XDP);
+	if (!xdp)
+		return -EMSGSIZE;
+
+	prog_id = 0;
+	mode = XDP_ATTACHED_NONE;
+	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
+				  IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
+	if (err)
+		goto err_cancel;
+	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
+				  IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
+	if (err)
+		goto err_cancel;
+	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
+				  IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
+	if (err)
+		goto err_cancel;
+
+	err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
+	if (err)
+		goto err_cancel;
+
+	if (prog_id && mode != XDP_ATTACHED_MULTI) {
+		err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
+		if (err)
+			goto err_cancel;
+	}
+
+	nla_nest_end(skb, xdp);
+	return 0;
+
+err_cancel:
+	nla_nest_cancel(skb, xdp);
+	return err;
+}
+
+static u32 rtnl_get_event(unsigned long event)
+{
+	u32 rtnl_event_type = IFLA_EVENT_NONE;
+
+	switch (event) {
+	case NETDEV_REBOOT:
+		rtnl_event_type = IFLA_EVENT_REBOOT;
+		break;
+	case NETDEV_FEAT_CHANGE:
+		rtnl_event_type = IFLA_EVENT_FEATURES;
+		break;
+	case NETDEV_BONDING_FAILOVER:
+		rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
+		break;
+	case NETDEV_NOTIFY_PEERS:
+		rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
+		break;
+	case NETDEV_RESEND_IGMP:
+		rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
+		break;
+	case NETDEV_CHANGEINFODATA:
+		rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
+		break;
+	default:
+		break;
+	}
+
+	return rtnl_event_type;
+}
+
+static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
+{
+	const struct net_device *upper_dev;
+	int ret = 0;
+
+	rcu_read_lock();
+
+	upper_dev = netdev_master_upper_dev_get_rcu(dev);
+	if (upper_dev)
+		ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
+
+	rcu_read_unlock();
+	return ret;
+}
+
+static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
+			  bool force)
+{
+	int ifindex = dev_get_iflink(dev);
+
+	if (force || dev->ifindex != ifindex)
+		return nla_put_u32(skb, IFLA_LINK, ifindex);
+
+	return 0;
+}
+
+static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
+					      struct net_device *dev)
+{
+	char buf[IFALIASZ];
+	int ret;
+
+	ret = dev_get_alias(dev, buf, sizeof(buf));
+	return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
+}
+
+static int rtnl_fill_link_netnsid(struct sk_buff *skb,
+				  const struct net_device *dev,
+				  struct net *src_net, gfp_t gfp)
+{
+	bool put_iflink = false;
+
+	if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
+		struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
+
+		if (!net_eq(dev_net(dev), link_net)) {
+			int id = peernet2id_alloc(src_net, link_net, gfp);
+
+			if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
+				return -EMSGSIZE;
+
+			put_iflink = true;
+		}
+	}
+
+	return nla_put_iflink(skb, dev, put_iflink);
+}
+
+static int rtnl_fill_link_af(struct sk_buff *skb,
+			     const struct net_device *dev,
+			     u32 ext_filter_mask)
+{
+	const struct rtnl_af_ops *af_ops;
+	struct nlattr *af_spec;
+
+	af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
+	if (!af_spec)
+		return -EMSGSIZE;
+
+	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
+		struct nlattr *af;
+		int err;
+
+		if (!af_ops->fill_link_af)
+			continue;
+
+		af = nla_nest_start_noflag(skb, af_ops->family);
+		if (!af)
+			return -EMSGSIZE;
+
+		err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
+		/*
+		 * Caller may return ENODATA to indicate that there
+		 * was no data to be dumped. This is not an error, it
+		 * means we should trim the attribute header and
+		 * continue.
+		 */
+		if (err == -ENODATA)
+			nla_nest_cancel(skb, af);
+		else if (err < 0)
+			return -EMSGSIZE;
+
+		nla_nest_end(skb, af);
+	}
+
+	nla_nest_end(skb, af_spec);
+	return 0;
+}
+
+static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
+				 const struct net_device *dev)
+{
+	struct netdev_name_node *name_node;
+	int count = 0;
+
+	list_for_each_entry(name_node, &dev->name_node->list, list) {
+		if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
+			return -EMSGSIZE;
+		count++;
+	}
+	return count;
+}
+
+static int rtnl_fill_prop_list(struct sk_buff *skb,
+			       const struct net_device *dev)
+{
+	struct nlattr *prop_list;
+	int ret;
+
+	prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
+	if (!prop_list)
+		return -EMSGSIZE;
+
+	ret = rtnl_fill_alt_ifnames(skb, dev);
+	if (ret <= 0)
+		goto nest_cancel;
+
+	nla_nest_end(skb, prop_list);
+	return 0;
+
+nest_cancel:
+	nla_nest_cancel(skb, prop_list);
+	return ret;
+}
+
+static int rtnl_fill_proto_down(struct sk_buff *skb,
+				const struct net_device *dev)
+{
+	struct nlattr *pr;
+	u32 preason;
+
+	if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
+		goto nla_put_failure;
+
+	preason = dev->proto_down_reason;
+	if (!preason)
+		return 0;
+
+	pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
+	if (!pr)
+		return -EMSGSIZE;
+
+	if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
+		nla_nest_cancel(skb, pr);
+		goto nla_put_failure;
+	}
+
+	nla_nest_end(skb, pr);
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static int rtnl_fill_ifinfo(struct sk_buff *skb,
+			    struct net_device *dev, struct net *src_net,
+			    int type, u32 pid, u32 seq, u32 change,
+			    unsigned int flags, u32 ext_filter_mask,
+			    u32 event, int *new_nsid, int new_ifindex,
+			    int tgt_netnsid, gfp_t gfp)
+{
+	struct ifinfomsg *ifm;
+	struct nlmsghdr *nlh;
+	struct Qdisc *qdisc;
+
+	ASSERT_RTNL();
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	ifm = nlmsg_data(nlh);
+	ifm->ifi_family = AF_UNSPEC;
+	ifm->__ifi_pad = 0;
+	ifm->ifi_type = dev->type;
+	ifm->ifi_index = dev->ifindex;
+	ifm->ifi_flags = dev_get_flags(dev);
+	ifm->ifi_change = change;
+
+	if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
+		goto nla_put_failure;
+
+	qdisc = rtnl_dereference(dev->qdisc);
+	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
+	    nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
+	    nla_put_u8(skb, IFLA_OPERSTATE,
+		       netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
+	    nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
+	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
+	    nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
+	    nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
+	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||
+	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
+	    nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
+	    nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
+	    nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
+	    nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
+	    nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
+	    nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
+	    nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
+#ifdef CONFIG_RPS
+	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
+#endif
+	    put_master_ifindex(skb, dev) ||
+	    nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
+	    (qdisc &&
+	     nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
+	    nla_put_ifalias(skb, dev) ||
+	    nla_put_u32(skb, IFLA_CARRIER_CHANGES,
+			atomic_read(&dev->carrier_up_count) +
+			atomic_read(&dev->carrier_down_count)) ||
+	    nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
+			atomic_read(&dev->carrier_up_count)) ||
+	    nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
+			atomic_read(&dev->carrier_down_count)))
+		goto nla_put_failure;
+
+	if (rtnl_fill_proto_down(skb, dev))
+		goto nla_put_failure;
+
+	if (event != IFLA_EVENT_NONE) {
+		if (nla_put_u32(skb, IFLA_EVENT, event))
+			goto nla_put_failure;
+	}
+
+	if (rtnl_fill_link_ifmap(skb, dev))
+		goto nla_put_failure;
+
+	if (dev->addr_len) {
+		if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
+		    nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
+			goto nla_put_failure;
+	}
+
+	if (rtnl_phys_port_id_fill(skb, dev))
+		goto nla_put_failure;
+
+	if (rtnl_phys_port_name_fill(skb, dev))
+		goto nla_put_failure;
+
+	if (rtnl_phys_switch_id_fill(skb, dev))
+		goto nla_put_failure;
+
+	if (rtnl_fill_stats(skb, dev))
+		goto nla_put_failure;
+
+	if (rtnl_fill_vf(skb, dev, ext_filter_mask))
+		goto nla_put_failure;
+
+	if (rtnl_port_fill(skb, dev, ext_filter_mask))
+		goto nla_put_failure;
+
+	if (rtnl_xdp_fill(skb, dev))
+		goto nla_put_failure;
+
+	if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
+		if (rtnl_link_fill(skb, dev) < 0)
+			goto nla_put_failure;
+	}
+
+	if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
+		goto nla_put_failure;
+
+	if (new_nsid &&
+	    nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
+		goto nla_put_failure;
+	if (new_ifindex &&
+	    nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
+		goto nla_put_failure;
+
+	if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
+	    nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
+		goto nla_put_failure;
+
+	rcu_read_lock();
+	if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
+		goto nla_put_failure_rcu;
+	rcu_read_unlock();
+
+	if (rtnl_fill_prop_list(skb, dev))
+		goto nla_put_failure;
+
+	if (dev->dev.parent &&
+	    nla_put_string(skb, IFLA_PARENT_DEV_NAME,
+			   dev_name(dev->dev.parent)))
+		goto nla_put_failure;
+
+	if (dev->dev.parent && dev->dev.parent->bus &&
+	    nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
+			   dev->dev.parent->bus->name))
+		goto nla_put_failure;
+
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure_rcu:
+	rcu_read_unlock();
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
+	[IFLA_IFNAME]		= { .type = NLA_STRING, .len = IFNAMSIZ-1 },
+	[IFLA_ADDRESS]		= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
+	[IFLA_BROADCAST]	= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
+	[IFLA_MAP]		= { .len = sizeof(struct rtnl_link_ifmap) },
+	[IFLA_MTU]		= { .type = NLA_U32 },
+	[IFLA_LINK]		= { .type = NLA_U32 },
+	[IFLA_MASTER]		= { .type = NLA_U32 },
+	[IFLA_CARRIER]		= { .type = NLA_U8 },
+	[IFLA_TXQLEN]		= { .type = NLA_U32 },
+	[IFLA_WEIGHT]		= { .type = NLA_U32 },
+	[IFLA_OPERSTATE]	= { .type = NLA_U8 },
+	[IFLA_LINKMODE]		= { .type = NLA_U8 },
+	[IFLA_LINKINFO]		= { .type = NLA_NESTED },
+	[IFLA_NET_NS_PID]	= { .type = NLA_U32 },
+	[IFLA_NET_NS_FD]	= { .type = NLA_U32 },
+	/* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
+	 * allow 0-length string (needed to remove an alias).
+	 */
+	[IFLA_IFALIAS]	        = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
+	[IFLA_VFINFO_LIST]	= {. type = NLA_NESTED },
+	[IFLA_VF_PORTS]		= { .type = NLA_NESTED },
+	[IFLA_PORT_SELF]	= { .type = NLA_NESTED },
+	[IFLA_AF_SPEC]		= { .type = NLA_NESTED },
+	[IFLA_EXT_MASK]		= { .type = NLA_U32 },
+	[IFLA_PROMISCUITY]	= { .type = NLA_U32 },
+	[IFLA_NUM_TX_QUEUES]	= { .type = NLA_U32 },
+	[IFLA_NUM_RX_QUEUES]	= { .type = NLA_U32 },
+	[IFLA_GSO_MAX_SEGS]	= { .type = NLA_U32 },
+	[IFLA_GSO_MAX_SIZE]	= { .type = NLA_U32 },
+	[IFLA_PHYS_PORT_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
+	[IFLA_CARRIER_CHANGES]	= { .type = NLA_U32 },  /* ignored */
+	[IFLA_PHYS_SWITCH_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
+	[IFLA_LINK_NETNSID]	= { .type = NLA_S32 },
+	[IFLA_PROTO_DOWN]	= { .type = NLA_U8 },
+	[IFLA_XDP]		= { .type = NLA_NESTED },
+	[IFLA_EVENT]		= { .type = NLA_U32 },
+	[IFLA_GROUP]		= { .type = NLA_U32 },
+	[IFLA_TARGET_NETNSID]	= { .type = NLA_S32 },
+	[IFLA_CARRIER_UP_COUNT]	= { .type = NLA_U32 },
+	[IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
+	[IFLA_MIN_MTU]		= { .type = NLA_U32 },
+	[IFLA_MAX_MTU]		= { .type = NLA_U32 },
+	[IFLA_PROP_LIST]	= { .type = NLA_NESTED },
+	[IFLA_ALT_IFNAME]	= { .type = NLA_STRING,
+				    .len = ALTIFNAMSIZ - 1 },
+	[IFLA_PERM_ADDRESS]	= { .type = NLA_REJECT },
+	[IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
+	[IFLA_NEW_IFINDEX]	= NLA_POLICY_MIN(NLA_S32, 1),
+	[IFLA_PARENT_DEV_NAME]	= { .type = NLA_NUL_STRING },
+	[IFLA_GRO_MAX_SIZE]	= { .type = NLA_U32 },
+	[IFLA_TSO_MAX_SIZE]	= { .type = NLA_REJECT },
+	[IFLA_TSO_MAX_SEGS]	= { .type = NLA_REJECT },
+	[IFLA_ALLMULTI]		= { .type = NLA_REJECT },
+};
+
+static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
+	[IFLA_INFO_KIND]	= { .type = NLA_STRING },
+	[IFLA_INFO_DATA]	= { .type = NLA_NESTED },
+	[IFLA_INFO_SLAVE_KIND]	= { .type = NLA_STRING },
+	[IFLA_INFO_SLAVE_DATA]	= { .type = NLA_NESTED },
+};
+
+static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
+	[IFLA_VF_MAC]		= { .len = sizeof(struct ifla_vf_mac) },
+	[IFLA_VF_BROADCAST]	= { .type = NLA_REJECT },
+	[IFLA_VF_VLAN]		= { .len = sizeof(struct ifla_vf_vlan) },
+	[IFLA_VF_VLAN_LIST]     = { .type = NLA_NESTED },
+	[IFLA_VF_TX_RATE]	= { .len = sizeof(struct ifla_vf_tx_rate) },
+	[IFLA_VF_SPOOFCHK]	= { .len = sizeof(struct ifla_vf_spoofchk) },
+	[IFLA_VF_RATE]		= { .len = sizeof(struct ifla_vf_rate) },
+	[IFLA_VF_LINK_STATE]	= { .len = sizeof(struct ifla_vf_link_state) },
+	[IFLA_VF_RSS_QUERY_EN]	= { .len = sizeof(struct ifla_vf_rss_query_en) },
+	[IFLA_VF_STATS]		= { .type = NLA_NESTED },
+	[IFLA_VF_TRUST]		= { .len = sizeof(struct ifla_vf_trust) },
+	[IFLA_VF_IB_NODE_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
+	[IFLA_VF_IB_PORT_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
+};
+
+static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
+	[IFLA_PORT_VF]		= { .type = NLA_U32 },
+	[IFLA_PORT_PROFILE]	= { .type = NLA_STRING,
+				    .len = PORT_PROFILE_MAX },
+	[IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
+				      .len = PORT_UUID_MAX },
+	[IFLA_PORT_HOST_UUID]	= { .type = NLA_STRING,
+				    .len = PORT_UUID_MAX },
+	[IFLA_PORT_REQUEST]	= { .type = NLA_U8, },
+	[IFLA_PORT_RESPONSE]	= { .type = NLA_U16, },
+
+	/* Unused, but we need to keep it here since user space could
+	 * fill it. It's also broken with regard to NLA_BINARY use in
+	 * combination with structs.
+	 */
+	[IFLA_PORT_VSI_TYPE]	= { .type = NLA_BINARY,
+				    .len = sizeof(struct ifla_port_vsi) },
+};
+
+static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
+	[IFLA_XDP_UNSPEC]	= { .strict_start_type = IFLA_XDP_EXPECTED_FD },
+	[IFLA_XDP_FD]		= { .type = NLA_S32 },
+	[IFLA_XDP_EXPECTED_FD]	= { .type = NLA_S32 },
+	[IFLA_XDP_ATTACHED]	= { .type = NLA_U8 },
+	[IFLA_XDP_FLAGS]	= { .type = NLA_U32 },
+	[IFLA_XDP_PROG_ID]	= { .type = NLA_U32 },
+};
+
+static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
+{
+	const struct rtnl_link_ops *ops = NULL;
+	struct nlattr *linfo[IFLA_INFO_MAX + 1];
+
+	if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
+		return NULL;
+
+	if (linfo[IFLA_INFO_KIND]) {
+		char kind[MODULE_NAME_LEN];
+
+		nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
+		ops = rtnl_link_ops_get(kind);
+	}
+
+	return ops;
+}
+
+static bool link_master_filtered(struct net_device *dev, int master_idx)
+{
+	struct net_device *master;
+
+	if (!master_idx)
+		return false;
+
+	master = netdev_master_upper_dev_get(dev);
+
+	/* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
+	 * another invalid value for ifindex to denote "no master".
+	 */
+	if (master_idx == -1)
+		return !!master;
+
+	if (!master || master->ifindex != master_idx)
+		return true;
+
+	return false;
+}
+
+static bool link_kind_filtered(const struct net_device *dev,
+			       const struct rtnl_link_ops *kind_ops)
+{
+	if (kind_ops && dev->rtnl_link_ops != kind_ops)
+		return true;
+
+	return false;
+}
+
+static bool link_dump_filtered(struct net_device *dev,
+			       int master_idx,
+			       const struct rtnl_link_ops *kind_ops)
+{
+	if (link_master_filtered(dev, master_idx) ||
+	    link_kind_filtered(dev, kind_ops))
+		return true;
+
+	return false;
+}
+
+/**
+ * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
+ * @sk: netlink socket
+ * @netnsid: network namespace identifier
+ *
+ * Returns the network namespace identified by netnsid on success or an error
+ * pointer on failure.
+ */
+struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
+{
+	struct net *net;
+
+	net = get_net_ns_by_id(sock_net(sk), netnsid);
+	if (!net)
+		return ERR_PTR(-EINVAL);
+
+	/* For now, the caller is required to have CAP_NET_ADMIN in
+	 * the user namespace owning the target net ns.
+	 */
+	if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
+		put_net(net);
+		return ERR_PTR(-EACCES);
+	}
+	return net;
+}
+EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
+
+static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
+				      bool strict_check, struct nlattr **tb,
+				      struct netlink_ext_ack *extack)
+{
+	int hdrlen;
+
+	if (strict_check) {
+		struct ifinfomsg *ifm;
+
+		if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
+			NL_SET_ERR_MSG(extack, "Invalid header for link dump");
+			return -EINVAL;
+		}
+
+		ifm = nlmsg_data(nlh);
+		if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
+		    ifm->ifi_change) {
+			NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
+			return -EINVAL;
+		}
+		if (ifm->ifi_index) {
+			NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
+			return -EINVAL;
+		}
+
+		return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
+						     IFLA_MAX, ifla_policy,
+						     extack);
+	}
+
+	/* A hack to preserve kernel<->userspace interface.
+	 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
+	 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
+	 * what iproute2 < v3.9.0 used.
+	 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
+	 * attribute, its netlink message is shorter than struct ifinfomsg.
+	 */
+	hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
+		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
+
+	return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
+				      extack);
+}
+
+static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct netlink_ext_ack *extack = cb->extack;
+	const struct nlmsghdr *nlh = cb->nlh;
+	struct net *net = sock_net(skb->sk);
+	struct net *tgt_net = net;
+	int h, s_h;
+	int idx = 0, s_idx;
+	struct net_device *dev;
+	struct hlist_head *head;
+	struct nlattr *tb[IFLA_MAX+1];
+	u32 ext_filter_mask = 0;
+	const struct rtnl_link_ops *kind_ops = NULL;
+	unsigned int flags = NLM_F_MULTI;
+	int master_idx = 0;
+	int netnsid = -1;
+	int err, i;
+
+	s_h = cb->args[0];
+	s_idx = cb->args[1];
+
+	err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
+	if (err < 0) {
+		if (cb->strict_check)
+			return err;
+
+		goto walk_entries;
+	}
+
+	for (i = 0; i <= IFLA_MAX; ++i) {
+		if (!tb[i])
+			continue;
+
+		/* new attributes should only be added with strict checking */
+		switch (i) {
+		case IFLA_TARGET_NETNSID:
+			netnsid = nla_get_s32(tb[i]);
+			tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
+			if (IS_ERR(tgt_net)) {
+				NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
+				return PTR_ERR(tgt_net);
+			}
+			break;
+		case IFLA_EXT_MASK:
+			ext_filter_mask = nla_get_u32(tb[i]);
+			break;
+		case IFLA_MASTER:
+			master_idx = nla_get_u32(tb[i]);
+			break;
+		case IFLA_LINKINFO:
+			kind_ops = linkinfo_to_kind_ops(tb[i]);
+			break;
+		default:
+			if (cb->strict_check) {
+				NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
+				return -EINVAL;
+			}
+		}
+	}
+
+	if (master_idx || kind_ops)
+		flags |= NLM_F_DUMP_FILTERED;
+
+walk_entries:
+	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+		idx = 0;
+		head = &tgt_net->dev_index_head[h];
+		hlist_for_each_entry(dev, head, index_hlist) {
+			if (link_dump_filtered(dev, master_idx, kind_ops))
+				goto cont;
+			if (idx < s_idx)
+				goto cont;
+			err = rtnl_fill_ifinfo(skb, dev, net,
+					       RTM_NEWLINK,
+					       NETLINK_CB(cb->skb).portid,
+					       nlh->nlmsg_seq, 0, flags,
+					       ext_filter_mask, 0, NULL, 0,
+					       netnsid, GFP_KERNEL);
+
+			if (err < 0) {
+				if (likely(skb->len))
+					goto out;
+
+				goto out_err;
+			}
+cont:
+			idx++;
+		}
+	}
+out:
+	err = skb->len;
+out_err:
+	cb->args[1] = idx;
+	cb->args[0] = h;
+	cb->seq = tgt_net->dev_base_seq;
+	nl_dump_check_consistent(cb, nlmsg_hdr(skb));
+	if (netnsid >= 0)
+		put_net(tgt_net);
+
+	return err;
+}
+
+int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
+			     struct netlink_ext_ack *exterr)
+{
+	const struct ifinfomsg *ifmp;
+	const struct nlattr *attrs;
+	size_t len;
+
+	ifmp = nla_data(nla_peer);
+	attrs = nla_data(nla_peer) + sizeof(struct ifinfomsg);
+	len = nla_len(nla_peer) - sizeof(struct ifinfomsg);
+
+	if (ifmp->ifi_index < 0) {
+		NL_SET_ERR_MSG_ATTR(exterr, nla_peer,
+				    "ifindex can't be negative");
+		return -EINVAL;
+	}
+
+	return nla_parse_deprecated(tb, IFLA_MAX, attrs, len, ifla_policy,
+				    exterr);
+}
+EXPORT_SYMBOL(rtnl_nla_parse_ifinfomsg);
+
+struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
+{
+	struct net *net;
+	/* Examine the link attributes and figure out which
+	 * network namespace we are talking about.
+	 */
+	if (tb[IFLA_NET_NS_PID])
+		net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
+	else if (tb[IFLA_NET_NS_FD])
+		net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
+	else
+		net = get_net(src_net);
+	return net;
+}
+EXPORT_SYMBOL(rtnl_link_get_net);
+
+/* Figure out which network namespace we are talking about by
+ * examining the link attributes in the following order:
+ *
+ * 1. IFLA_NET_NS_PID
+ * 2. IFLA_NET_NS_FD
+ * 3. IFLA_TARGET_NETNSID
+ */
+static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
+					       struct nlattr *tb[])
+{
+	struct net *net;
+
+	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
+		return rtnl_link_get_net(src_net, tb);
+
+	if (!tb[IFLA_TARGET_NETNSID])
+		return get_net(src_net);
+
+	net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
+	if (!net)
+		return ERR_PTR(-EINVAL);
+
+	return net;
+}
+
+static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
+					     struct net *src_net,
+					     struct nlattr *tb[], int cap)
+{
+	struct net *net;
+
+	net = rtnl_link_get_net_by_nlattr(src_net, tb);
+	if (IS_ERR(net))
+		return net;
+
+	if (!netlink_ns_capable(skb, net->user_ns, cap)) {
+		put_net(net);
+		return ERR_PTR(-EPERM);
+	}
+
+	return net;
+}
+
+/* Verify that rtnetlink requests do not pass additional properties
+ * potentially referring to different network namespaces.
+ */
+static int rtnl_ensure_unique_netns(struct nlattr *tb[],
+				    struct netlink_ext_ack *extack,
+				    bool netns_id_only)
+{
+
+	if (netns_id_only) {
+		if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
+			return 0;
+
+		NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
+		return -EOPNOTSUPP;
+	}
+
+	if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
+		goto invalid_attr;
+
+	if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
+		goto invalid_attr;
+
+	if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
+		goto invalid_attr;
+
+	return 0;
+
+invalid_attr:
+	NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
+	return -EINVAL;
+}
+
+static	int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
+			     int max_tx_rate)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	if (!ops->ndo_set_vf_rate)
+		return -EOPNOTSUPP;
+	if (max_tx_rate && max_tx_rate < min_tx_rate)
+		return -EINVAL;
+
+	return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
+}
+
+static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
+			    struct netlink_ext_ack *extack)
+{
+	if (dev) {
+		if (tb[IFLA_ADDRESS] &&
+		    nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
+			return -EINVAL;
+
+		if (tb[IFLA_BROADCAST] &&
+		    nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
+			return -EINVAL;
+	}
+
+	if (tb[IFLA_AF_SPEC]) {
+		struct nlattr *af;
+		int rem, err;
+
+		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
+			const struct rtnl_af_ops *af_ops;
+
+			af_ops = rtnl_af_lookup(nla_type(af));
+			if (!af_ops)
+				return -EAFNOSUPPORT;
+
+			if (!af_ops->set_link_af)
+				return -EOPNOTSUPP;
+
+			if (af_ops->validate_link_af) {
+				err = af_ops->validate_link_af(dev, af, extack);
+				if (err < 0)
+					return err;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
+				  int guid_type)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
+}
+
+static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
+{
+	if (dev->type != ARPHRD_INFINIBAND)
+		return -EOPNOTSUPP;
+
+	return handle_infiniband_guid(dev, ivt, guid_type);
+}
+
+static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+	int err = -EINVAL;
+
+	if (tb[IFLA_VF_MAC]) {
+		struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
+
+		if (ivm->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_mac)
+			err = ops->ndo_set_vf_mac(dev, ivm->vf,
+						  ivm->mac);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_VLAN]) {
+		struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
+
+		if (ivv->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_vlan)
+			err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
+						   ivv->qos,
+						   htons(ETH_P_8021Q));
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_VLAN_LIST]) {
+		struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
+		struct nlattr *attr;
+		int rem, len = 0;
+
+		err = -EOPNOTSUPP;
+		if (!ops->ndo_set_vf_vlan)
+			return err;
+
+		nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
+			if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
+			    nla_len(attr) < NLA_HDRLEN) {
+				return -EINVAL;
+			}
+			if (len >= MAX_VLAN_LIST_LEN)
+				return -EOPNOTSUPP;
+			ivvl[len] = nla_data(attr);
+
+			len++;
+		}
+		if (len == 0)
+			return -EINVAL;
+
+		if (ivvl[0]->vf >= INT_MAX)
+			return -EINVAL;
+		err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
+					   ivvl[0]->qos, ivvl[0]->vlan_proto);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_TX_RATE]) {
+		struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
+		struct ifla_vf_info ivf;
+
+		if (ivt->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_get_vf_config)
+			err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
+		if (err < 0)
+			return err;
+
+		err = rtnl_set_vf_rate(dev, ivt->vf,
+				       ivf.min_tx_rate, ivt->rate);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_RATE]) {
+		struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
+
+		if (ivt->vf >= INT_MAX)
+			return -EINVAL;
+
+		err = rtnl_set_vf_rate(dev, ivt->vf,
+				       ivt->min_tx_rate, ivt->max_tx_rate);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_SPOOFCHK]) {
+		struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
+
+		if (ivs->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_spoofchk)
+			err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
+						       ivs->setting);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_LINK_STATE]) {
+		struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
+
+		if (ivl->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_link_state)
+			err = ops->ndo_set_vf_link_state(dev, ivl->vf,
+							 ivl->link_state);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_RSS_QUERY_EN]) {
+		struct ifla_vf_rss_query_en *ivrssq_en;
+
+		err = -EOPNOTSUPP;
+		ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
+		if (ivrssq_en->vf >= INT_MAX)
+			return -EINVAL;
+		if (ops->ndo_set_vf_rss_query_en)
+			err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
+							   ivrssq_en->setting);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_TRUST]) {
+		struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
+
+		if (ivt->vf >= INT_MAX)
+			return -EINVAL;
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_trust)
+			err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
+		if (err < 0)
+			return err;
+	}
+
+	if (tb[IFLA_VF_IB_NODE_GUID]) {
+		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
+
+		if (ivt->vf >= INT_MAX)
+			return -EINVAL;
+		if (!ops->ndo_set_vf_guid)
+			return -EOPNOTSUPP;
+		return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
+	}
+
+	if (tb[IFLA_VF_IB_PORT_GUID]) {
+		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
+
+		if (ivt->vf >= INT_MAX)
+			return -EINVAL;
+		if (!ops->ndo_set_vf_guid)
+			return -EOPNOTSUPP;
+
+		return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
+	}
+
+	return err;
+}
+
+static int do_set_master(struct net_device *dev, int ifindex,
+			 struct netlink_ext_ack *extack)
+{
+	struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
+	const struct net_device_ops *ops;
+	int err;
+
+	if (upper_dev) {
+		if (upper_dev->ifindex == ifindex)
+			return 0;
+		ops = upper_dev->netdev_ops;
+		if (ops->ndo_del_slave) {
+			err = ops->ndo_del_slave(upper_dev, dev);
+			if (err)
+				return err;
+		} else {
+			return -EOPNOTSUPP;
+		}
+	}
+
+	if (ifindex) {
+		upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
+		if (!upper_dev)
+			return -EINVAL;
+		ops = upper_dev->netdev_ops;
+		if (ops->ndo_add_slave) {
+			err = ops->ndo_add_slave(upper_dev, dev, extack);
+			if (err)
+				return err;
+		} else {
+			return -EOPNOTSUPP;
+		}
+	}
+	return 0;
+}
+
+static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
+	[IFLA_PROTO_DOWN_REASON_MASK]	= { .type = NLA_U32 },
+	[IFLA_PROTO_DOWN_REASON_VALUE]	= { .type = NLA_U32 },
+};
+
+static int do_set_proto_down(struct net_device *dev,
+			     struct nlattr *nl_proto_down,
+			     struct nlattr *nl_proto_down_reason,
+			     struct netlink_ext_ack *extack)
+{
+	struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
+	unsigned long mask = 0;
+	u32 value;
+	bool proto_down;
+	int err;
+
+	if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
+		NL_SET_ERR_MSG(extack,  "Protodown not supported by device");
+		return -EOPNOTSUPP;
+	}
+
+	if (nl_proto_down_reason) {
+		err = nla_parse_nested_deprecated(pdreason,
+						  IFLA_PROTO_DOWN_REASON_MAX,
+						  nl_proto_down_reason,
+						  ifla_proto_down_reason_policy,
+						  NULL);
+		if (err < 0)
+			return err;
+
+		if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
+			NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
+			return -EINVAL;
+		}
+
+		value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
+
+		if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
+			mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
+
+		dev_change_proto_down_reason(dev, mask, value);
+	}
+
+	if (nl_proto_down) {
+		proto_down = nla_get_u8(nl_proto_down);
+
+		/* Don't turn off protodown if there are active reasons */
+		if (!proto_down && dev->proto_down_reason) {
+			NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
+			return -EBUSY;
+		}
+		err = dev_change_proto_down(dev,
+					    proto_down);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+#define DO_SETLINK_MODIFIED	0x01
+/* notify flag means notify + modified. */
+#define DO_SETLINK_NOTIFY	0x03
+static int do_setlink(const struct sk_buff *skb,
+		      struct net_device *dev, struct ifinfomsg *ifm,
+		      struct netlink_ext_ack *extack,
+		      struct nlattr **tb, int status)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+	char ifname[IFNAMSIZ];
+	int err;
+
+	err = validate_linkmsg(dev, tb, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_IFNAME])
+		nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+	else
+		ifname[0] = '\0';
+
+	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
+		const char *pat = ifname[0] ? ifname : NULL;
+		struct net *net;
+		int new_ifindex;
+
+		net = rtnl_link_get_net_capable(skb, dev_net(dev),
+						tb, CAP_NET_ADMIN);
+		if (IS_ERR(net)) {
+			err = PTR_ERR(net);
+			goto errout;
+		}
+
+		if (tb[IFLA_NEW_IFINDEX])
+			new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
+		else
+			new_ifindex = 0;
+
+		err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
+		put_net(net);
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_MAP]) {
+		struct rtnl_link_ifmap *u_map;
+		struct ifmap k_map;
+
+		if (!ops->ndo_set_config) {
+			err = -EOPNOTSUPP;
+			goto errout;
+		}
+
+		if (!netif_device_present(dev)) {
+			err = -ENODEV;
+			goto errout;
+		}
+
+		u_map = nla_data(tb[IFLA_MAP]);
+		k_map.mem_start = (unsigned long) u_map->mem_start;
+		k_map.mem_end = (unsigned long) u_map->mem_end;
+		k_map.base_addr = (unsigned short) u_map->base_addr;
+		k_map.irq = (unsigned char) u_map->irq;
+		k_map.dma = (unsigned char) u_map->dma;
+		k_map.port = (unsigned char) u_map->port;
+
+		err = ops->ndo_set_config(dev, &k_map);
+		if (err < 0)
+			goto errout;
+
+		status |= DO_SETLINK_NOTIFY;
+	}
+
+	if (tb[IFLA_ADDRESS]) {
+		struct sockaddr *sa;
+		int len;
+
+		len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
+						  sizeof(*sa));
+		sa = kmalloc(len, GFP_KERNEL);
+		if (!sa) {
+			err = -ENOMEM;
+			goto errout;
+		}
+		sa->sa_family = dev->type;
+		memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
+		       dev->addr_len);
+		err = dev_set_mac_address_user(dev, sa, extack);
+		kfree(sa);
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_MTU]) {
+		err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
+		if (err < 0)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_GROUP]) {
+		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
+		status |= DO_SETLINK_NOTIFY;
+	}
+
+	/*
+	 * Interface selected by interface index but interface
+	 * name provided implies that a name change has been
+	 * requested.
+	 */
+	if (ifm->ifi_index > 0 && ifname[0]) {
+		err = dev_change_name(dev, ifname);
+		if (err < 0)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_IFALIAS]) {
+		err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
+				    nla_len(tb[IFLA_IFALIAS]));
+		if (err < 0)
+			goto errout;
+		status |= DO_SETLINK_NOTIFY;
+	}
+
+	if (tb[IFLA_BROADCAST]) {
+		nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
+	}
+
+	if (ifm->ifi_flags || ifm->ifi_change) {
+		err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
+				       extack);
+		if (err < 0)
+			goto errout;
+	}
+
+	if (tb[IFLA_MASTER]) {
+		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_CARRIER]) {
+		err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_TXQLEN]) {
+		unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
+
+		err = dev_change_tx_queue_len(dev, value);
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_MODIFIED;
+	}
+
+	if (tb[IFLA_GSO_MAX_SIZE]) {
+		u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
+
+		if (max_size > dev->tso_max_size) {
+			err = -EINVAL;
+			goto errout;
+		}
+
+		if (dev->gso_max_size ^ max_size) {
+			netif_set_gso_max_size(dev, max_size);
+			status |= DO_SETLINK_MODIFIED;
+		}
+	}
+
+	if (tb[IFLA_GSO_MAX_SEGS]) {
+		u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
+
+		if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) {
+			err = -EINVAL;
+			goto errout;
+		}
+
+		if (dev->gso_max_segs ^ max_segs) {
+			netif_set_gso_max_segs(dev, max_segs);
+			status |= DO_SETLINK_MODIFIED;
+		}
+	}
+
+	if (tb[IFLA_GRO_MAX_SIZE]) {
+		u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
+
+		if (dev->gro_max_size ^ gro_max_size) {
+			netif_set_gro_max_size(dev, gro_max_size);
+			status |= DO_SETLINK_MODIFIED;
+		}
+	}
+
+	if (tb[IFLA_OPERSTATE])
+		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
+
+	if (tb[IFLA_LINKMODE]) {
+		unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
+
+		write_lock(&dev_base_lock);
+		if (dev->link_mode ^ value)
+			status |= DO_SETLINK_NOTIFY;
+		dev->link_mode = value;
+		write_unlock(&dev_base_lock);
+	}
+
+	if (tb[IFLA_VFINFO_LIST]) {
+		struct nlattr *vfinfo[IFLA_VF_MAX + 1];
+		struct nlattr *attr;
+		int rem;
+
+		nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
+			if (nla_type(attr) != IFLA_VF_INFO ||
+			    nla_len(attr) < NLA_HDRLEN) {
+				err = -EINVAL;
+				goto errout;
+			}
+			err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
+							  attr,
+							  ifla_vf_policy,
+							  NULL);
+			if (err < 0)
+				goto errout;
+			err = do_setvfinfo(dev, vfinfo);
+			if (err < 0)
+				goto errout;
+			status |= DO_SETLINK_NOTIFY;
+		}
+	}
+	err = 0;
+
+	if (tb[IFLA_VF_PORTS]) {
+		struct nlattr *port[IFLA_PORT_MAX+1];
+		struct nlattr *attr;
+		int vf;
+		int rem;
+
+		err = -EOPNOTSUPP;
+		if (!ops->ndo_set_vf_port)
+			goto errout;
+
+		nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
+			if (nla_type(attr) != IFLA_VF_PORT ||
+			    nla_len(attr) < NLA_HDRLEN) {
+				err = -EINVAL;
+				goto errout;
+			}
+			err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
+							  attr,
+							  ifla_port_policy,
+							  NULL);
+			if (err < 0)
+				goto errout;
+			if (!port[IFLA_PORT_VF]) {
+				err = -EOPNOTSUPP;
+				goto errout;
+			}
+			vf = nla_get_u32(port[IFLA_PORT_VF]);
+			err = ops->ndo_set_vf_port(dev, vf, port);
+			if (err < 0)
+				goto errout;
+			status |= DO_SETLINK_NOTIFY;
+		}
+	}
+	err = 0;
+
+	if (tb[IFLA_PORT_SELF]) {
+		struct nlattr *port[IFLA_PORT_MAX+1];
+
+		err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
+						  tb[IFLA_PORT_SELF],
+						  ifla_port_policy, NULL);
+		if (err < 0)
+			goto errout;
+
+		err = -EOPNOTSUPP;
+		if (ops->ndo_set_vf_port)
+			err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
+		if (err < 0)
+			goto errout;
+		status |= DO_SETLINK_NOTIFY;
+	}
+
+	if (tb[IFLA_AF_SPEC]) {
+		struct nlattr *af;
+		int rem;
+
+		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
+			const struct rtnl_af_ops *af_ops;
+
+			BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
+
+			err = af_ops->set_link_af(dev, af, extack);
+			if (err < 0)
+				goto errout;
+
+			status |= DO_SETLINK_NOTIFY;
+		}
+	}
+	err = 0;
+
+	if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
+		err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
+					tb[IFLA_PROTO_DOWN_REASON], extack);
+		if (err)
+			goto errout;
+		status |= DO_SETLINK_NOTIFY;
+	}
+
+	if (tb[IFLA_XDP]) {
+		struct nlattr *xdp[IFLA_XDP_MAX + 1];
+		u32 xdp_flags = 0;
+
+		err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
+						  tb[IFLA_XDP],
+						  ifla_xdp_policy, NULL);
+		if (err < 0)
+			goto errout;
+
+		if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
+			err = -EINVAL;
+			goto errout;
+		}
+
+		if (xdp[IFLA_XDP_FLAGS]) {
+			xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
+			if (xdp_flags & ~XDP_FLAGS_MASK) {
+				err = -EINVAL;
+				goto errout;
+			}
+			if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
+				err = -EINVAL;
+				goto errout;
+			}
+		}
+
+		if (xdp[IFLA_XDP_FD]) {
+			int expected_fd = -1;
+
+			if (xdp_flags & XDP_FLAGS_REPLACE) {
+				if (!xdp[IFLA_XDP_EXPECTED_FD]) {
+					err = -EINVAL;
+					goto errout;
+				}
+				expected_fd =
+					nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
+			}
+
+			err = dev_change_xdp_fd(dev, extack,
+						nla_get_s32(xdp[IFLA_XDP_FD]),
+						expected_fd,
+						xdp_flags);
+			if (err)
+				goto errout;
+			status |= DO_SETLINK_NOTIFY;
+		}
+	}
+
+errout:
+	if (status & DO_SETLINK_MODIFIED) {
+		if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
+			netdev_state_change(dev);
+
+		if (err < 0)
+			net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
+					     dev->name);
+	}
+
+	return err;
+}
+
+static struct net_device *rtnl_dev_get(struct net *net,
+				       struct nlattr *tb[])
+{
+	char ifname[ALTIFNAMSIZ];
+
+	if (tb[IFLA_IFNAME])
+		nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+	else if (tb[IFLA_ALT_IFNAME])
+		nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
+	else
+		return NULL;
+
+	return __dev_get_by_name(net, ifname);
+}
+
+static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct ifinfomsg *ifm;
+	struct net_device *dev;
+	int err;
+	struct nlattr *tb[IFLA_MAX+1];
+
+	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
+				     ifla_policy, extack);
+	if (err < 0)
+		goto errout;
+
+	err = rtnl_ensure_unique_netns(tb, extack, false);
+	if (err < 0)
+		goto errout;
+
+	err = -EINVAL;
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_index > 0)
+		dev = __dev_get_by_index(net, ifm->ifi_index);
+	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
+		dev = rtnl_dev_get(net, tb);
+	else
+		goto errout;
+
+	if (dev == NULL) {
+		err = -ENODEV;
+		goto errout;
+	}
+
+	err = do_setlink(skb, dev, ifm, extack, tb, 0);
+errout:
+	return err;
+}
+
+static int rtnl_group_dellink(const struct net *net, int group)
+{
+	struct net_device *dev, *aux;
+	LIST_HEAD(list_kill);
+	bool found = false;
+
+	if (!group)
+		return -EPERM;
+
+	for_each_netdev(net, dev) {
+		if (dev->group == group) {
+			const struct rtnl_link_ops *ops;
+
+			found = true;
+			ops = dev->rtnl_link_ops;
+			if (!ops || !ops->dellink)
+				return -EOPNOTSUPP;
+		}
+	}
+
+	if (!found)
+		return -ENODEV;
+
+	for_each_netdev_safe(net, dev, aux) {
+		if (dev->group == group) {
+			const struct rtnl_link_ops *ops;
+
+			ops = dev->rtnl_link_ops;
+			ops->dellink(dev, &list_kill);
+		}
+	}
+	unregister_netdevice_many(&list_kill);
+
+	return 0;
+}
+
+int rtnl_delete_link(struct net_device *dev)
+{
+	const struct rtnl_link_ops *ops;
+	LIST_HEAD(list_kill);
+
+	ops = dev->rtnl_link_ops;
+	if (!ops || !ops->dellink)
+		return -EOPNOTSUPP;
+
+	ops->dellink(dev, &list_kill);
+	unregister_netdevice_many(&list_kill);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rtnl_delete_link);
+
+static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net *tgt_net = net;
+	struct net_device *dev = NULL;
+	struct ifinfomsg *ifm;
+	struct nlattr *tb[IFLA_MAX+1];
+	int err;
+	int netnsid = -1;
+
+	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
+				     ifla_policy, extack);
+	if (err < 0)
+		return err;
+
+	err = rtnl_ensure_unique_netns(tb, extack, true);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_TARGET_NETNSID]) {
+		netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
+		tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
+		if (IS_ERR(tgt_net))
+			return PTR_ERR(tgt_net);
+	}
+
+	err = -EINVAL;
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_index > 0)
+		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
+	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
+		dev = rtnl_dev_get(net, tb);
+	else if (tb[IFLA_GROUP])
+		err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
+	else
+		goto out;
+
+	if (!dev) {
+		if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
+			err = -ENODEV;
+
+		goto out;
+	}
+
+	err = rtnl_delete_link(dev);
+
+out:
+	if (netnsid >= 0)
+		put_net(tgt_net);
+
+	return err;
+}
+
+int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
+{
+	unsigned int old_flags;
+	int err;
+
+	old_flags = dev->flags;
+	if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
+		err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
+					 NULL);
+		if (err < 0)
+			return err;
+	}
+
+	if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
+		__dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
+	} else {
+		dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
+		__dev_notify_flags(dev, old_flags, ~0U);
+	}
+	return 0;
+}
+EXPORT_SYMBOL(rtnl_configure_link);
+
+struct net_device *rtnl_create_link(struct net *net, const char *ifname,
+				    unsigned char name_assign_type,
+				    const struct rtnl_link_ops *ops,
+				    struct nlattr *tb[],
+				    struct netlink_ext_ack *extack)
+{
+	struct net_device *dev;
+	unsigned int num_tx_queues = 1;
+	unsigned int num_rx_queues = 1;
+	int err;
+
+	if (tb[IFLA_NUM_TX_QUEUES])
+		num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
+	else if (ops->get_num_tx_queues)
+		num_tx_queues = ops->get_num_tx_queues();
+
+	if (tb[IFLA_NUM_RX_QUEUES])
+		num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
+	else if (ops->get_num_rx_queues)
+		num_rx_queues = ops->get_num_rx_queues();
+
+	if (num_tx_queues < 1 || num_tx_queues > 4096) {
+		NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (num_rx_queues < 1 || num_rx_queues > 4096) {
+		NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (ops->alloc) {
+		dev = ops->alloc(tb, ifname, name_assign_type,
+				 num_tx_queues, num_rx_queues);
+		if (IS_ERR(dev))
+			return dev;
+	} else {
+		dev = alloc_netdev_mqs(ops->priv_size, ifname,
+				       name_assign_type, ops->setup,
+				       num_tx_queues, num_rx_queues);
+	}
+
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	err = validate_linkmsg(dev, tb, extack);
+	if (err < 0) {
+		free_netdev(dev);
+		return ERR_PTR(err);
+	}
+
+	dev_net_set(dev, net);
+	dev->rtnl_link_ops = ops;
+	dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
+
+	if (tb[IFLA_MTU]) {
+		u32 mtu = nla_get_u32(tb[IFLA_MTU]);
+
+		err = dev_validate_mtu(dev, mtu, extack);
+		if (err) {
+			free_netdev(dev);
+			return ERR_PTR(err);
+		}
+		dev->mtu = mtu;
+	}
+	if (tb[IFLA_ADDRESS]) {
+		__dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
+			       nla_len(tb[IFLA_ADDRESS]));
+		dev->addr_assign_type = NET_ADDR_SET;
+	}
+	if (tb[IFLA_BROADCAST])
+		memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
+				nla_len(tb[IFLA_BROADCAST]));
+	if (tb[IFLA_TXQLEN])
+		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
+	if (tb[IFLA_OPERSTATE])
+		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
+	if (tb[IFLA_LINKMODE])
+		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+	if (tb[IFLA_GROUP])
+		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
+	if (tb[IFLA_GSO_MAX_SIZE])
+		netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
+	if (tb[IFLA_GSO_MAX_SEGS])
+		netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
+	if (tb[IFLA_GRO_MAX_SIZE])
+		netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
+
+	return dev;
+}
+EXPORT_SYMBOL(rtnl_create_link);
+
+static int rtnl_group_changelink(const struct sk_buff *skb,
+		struct net *net, int group,
+		struct ifinfomsg *ifm,
+		struct netlink_ext_ack *extack,
+		struct nlattr **tb)
+{
+	struct net_device *dev, *aux;
+	int err;
+
+	for_each_netdev_safe(net, dev, aux) {
+		if (dev->group == group) {
+			err = do_setlink(skb, dev, ifm, extack, tb, 0);
+			if (err < 0)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
+			       const struct rtnl_link_ops *ops,
+			       struct nlattr **tb, struct nlattr **data,
+			       struct netlink_ext_ack *extack)
+{
+	unsigned char name_assign_type = NET_NAME_USER;
+	struct net *net = sock_net(skb->sk);
+	struct net *dest_net, *link_net;
+	struct net_device *dev;
+	char ifname[IFNAMSIZ];
+	int err;
+
+	if (!ops->alloc && !ops->setup)
+		return -EOPNOTSUPP;
+
+	if (tb[IFLA_IFNAME]) {
+		nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+	} else {
+		snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
+		name_assign_type = NET_NAME_ENUM;
+	}
+
+	dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
+	if (IS_ERR(dest_net))
+		return PTR_ERR(dest_net);
+
+	if (tb[IFLA_LINK_NETNSID]) {
+		int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
+
+		link_net = get_net_ns_by_id(dest_net, id);
+		if (!link_net) {
+			NL_SET_ERR_MSG(extack, "Unknown network namespace id");
+			err =  -EINVAL;
+			goto out;
+		}
+		err = -EPERM;
+		if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
+			goto out;
+	} else {
+		link_net = NULL;
+	}
+
+	dev = rtnl_create_link(link_net ? : dest_net, ifname,
+			       name_assign_type, ops, tb, extack);
+	if (IS_ERR(dev)) {
+		err = PTR_ERR(dev);
+		goto out;
+	}
+
+	dev->ifindex = ifm->ifi_index;
+
+	if (ops->newlink)
+		err = ops->newlink(link_net ? : net, dev, tb, data, extack);
+	else
+		err = register_netdevice(dev);
+	if (err < 0) {
+		free_netdev(dev);
+		goto out;
+	}
+
+	err = rtnl_configure_link(dev, ifm);
+	if (err < 0)
+		goto out_unregister;
+	if (link_net) {
+		err = dev_change_net_namespace(dev, dest_net, ifname);
+		if (err < 0)
+			goto out_unregister;
+	}
+	if (tb[IFLA_MASTER]) {
+		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
+		if (err)
+			goto out_unregister;
+	}
+out:
+	if (link_net)
+		put_net(link_net);
+	put_net(dest_net);
+	return err;
+out_unregister:
+	if (ops->newlink) {
+		LIST_HEAD(list_kill);
+
+		ops->dellink(dev, &list_kill);
+		unregister_netdevice_many(&list_kill);
+	} else {
+		unregister_netdevice(dev);
+	}
+	goto out;
+}
+
+struct rtnl_newlink_tbs {
+	struct nlattr *tb[IFLA_MAX + 1];
+	struct nlattr *attr[RTNL_MAX_TYPE + 1];
+	struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
+};
+
+static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			  struct rtnl_newlink_tbs *tbs,
+			  struct netlink_ext_ack *extack)
+{
+	struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
+	struct nlattr ** const tb = tbs->tb;
+	const struct rtnl_link_ops *m_ops;
+	struct net_device *master_dev;
+	struct net *net = sock_net(skb->sk);
+	const struct rtnl_link_ops *ops;
+	struct nlattr **slave_data;
+	char kind[MODULE_NAME_LEN];
+	struct net_device *dev;
+	struct ifinfomsg *ifm;
+	struct nlattr **data;
+	bool link_specified;
+	int err;
+
+#ifdef CONFIG_MODULES
+replay:
+#endif
+	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
+				     ifla_policy, extack);
+	if (err < 0)
+		return err;
+
+	err = rtnl_ensure_unique_netns(tb, extack, false);
+	if (err < 0)
+		return err;
+
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_index > 0) {
+		link_specified = true;
+		dev = __dev_get_by_index(net, ifm->ifi_index);
+	} else if (ifm->ifi_index < 0) {
+		NL_SET_ERR_MSG(extack, "ifindex can't be negative");
+		return -EINVAL;
+	} else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
+		link_specified = true;
+		dev = rtnl_dev_get(net, tb);
+	} else {
+		link_specified = false;
+		dev = NULL;
+	}
+
+	master_dev = NULL;
+	m_ops = NULL;
+	if (dev) {
+		master_dev = netdev_master_upper_dev_get(dev);
+		if (master_dev)
+			m_ops = master_dev->rtnl_link_ops;
+	}
+
+	err = validate_linkmsg(dev, tb, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_LINKINFO]) {
+		err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
+						  tb[IFLA_LINKINFO],
+						  ifla_info_policy, NULL);
+		if (err < 0)
+			return err;
+	} else
+		memset(linkinfo, 0, sizeof(linkinfo));
+
+	if (linkinfo[IFLA_INFO_KIND]) {
+		nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
+		ops = rtnl_link_ops_get(kind);
+	} else {
+		kind[0] = '\0';
+		ops = NULL;
+	}
+
+	data = NULL;
+	if (ops) {
+		if (ops->maxtype > RTNL_MAX_TYPE)
+			return -EINVAL;
+
+		if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
+			err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
+							  linkinfo[IFLA_INFO_DATA],
+							  ops->policy, extack);
+			if (err < 0)
+				return err;
+			data = tbs->attr;
+		}
+		if (ops->validate) {
+			err = ops->validate(tb, data, extack);
+			if (err < 0)
+				return err;
+		}
+	}
+
+	slave_data = NULL;
+	if (m_ops) {
+		if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
+			return -EINVAL;
+
+		if (m_ops->slave_maxtype &&
+		    linkinfo[IFLA_INFO_SLAVE_DATA]) {
+			err = nla_parse_nested_deprecated(tbs->slave_attr,
+							  m_ops->slave_maxtype,
+							  linkinfo[IFLA_INFO_SLAVE_DATA],
+							  m_ops->slave_policy,
+							  extack);
+			if (err < 0)
+				return err;
+			slave_data = tbs->slave_attr;
+		}
+	}
+
+	if (dev) {
+		int status = 0;
+
+		if (nlh->nlmsg_flags & NLM_F_EXCL)
+			return -EEXIST;
+		if (nlh->nlmsg_flags & NLM_F_REPLACE)
+			return -EOPNOTSUPP;
+
+		if (linkinfo[IFLA_INFO_DATA]) {
+			if (!ops || ops != dev->rtnl_link_ops ||
+			    !ops->changelink)
+				return -EOPNOTSUPP;
+
+			err = ops->changelink(dev, tb, data, extack);
+			if (err < 0)
+				return err;
+			status |= DO_SETLINK_NOTIFY;
+		}
+
+		if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
+			if (!m_ops || !m_ops->slave_changelink)
+				return -EOPNOTSUPP;
+
+			err = m_ops->slave_changelink(master_dev, dev, tb,
+						      slave_data, extack);
+			if (err < 0)
+				return err;
+			status |= DO_SETLINK_NOTIFY;
+		}
+
+		return do_setlink(skb, dev, ifm, extack, tb, status);
+	}
+
+	if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
+		/* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
+		 * or it's for a group
+		*/
+		if (link_specified)
+			return -ENODEV;
+		if (tb[IFLA_GROUP])
+			return rtnl_group_changelink(skb, net,
+						nla_get_u32(tb[IFLA_GROUP]),
+						ifm, extack, tb);
+		return -ENODEV;
+	}
+
+	if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
+		return -EOPNOTSUPP;
+
+	if (!ops) {
+#ifdef CONFIG_MODULES
+		if (kind[0]) {
+			__rtnl_unlock();
+			request_module("rtnl-link-%s", kind);
+			rtnl_lock();
+			ops = rtnl_link_ops_get(kind);
+			if (ops)
+				goto replay;
+		}
+#endif
+		NL_SET_ERR_MSG(extack, "Unknown device type");
+		return -EOPNOTSUPP;
+	}
+
+	return rtnl_newlink_create(skb, ifm, ops, tb, data, extack);
+}
+
+static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct rtnl_newlink_tbs *tbs;
+	int ret;
+
+	tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
+	if (!tbs)
+		return -ENOMEM;
+
+	ret = __rtnl_newlink(skb, nlh, tbs, extack);
+	kfree(tbs);
+	return ret;
+}
+
+static int rtnl_valid_getlink_req(struct sk_buff *skb,
+				  const struct nlmsghdr *nlh,
+				  struct nlattr **tb,
+				  struct netlink_ext_ack *extack)
+{
+	struct ifinfomsg *ifm;
+	int i, err;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
+		NL_SET_ERR_MSG(extack, "Invalid header for get link");
+		return -EINVAL;
+	}
+
+	if (!netlink_strict_get_check(skb))
+		return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
+					      ifla_policy, extack);
+
+	ifm = nlmsg_data(nlh);
+	if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
+	    ifm->ifi_change) {
+		NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
+					    ifla_policy, extack);
+	if (err)
+		return err;
+
+	for (i = 0; i <= IFLA_MAX; i++) {
+		if (!tb[i])
+			continue;
+
+		switch (i) {
+		case IFLA_IFNAME:
+		case IFLA_ALT_IFNAME:
+		case IFLA_EXT_MASK:
+		case IFLA_TARGET_NETNSID:
+			break;
+		default:
+			NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net *tgt_net = net;
+	struct ifinfomsg *ifm;
+	struct nlattr *tb[IFLA_MAX+1];
+	struct net_device *dev = NULL;
+	struct sk_buff *nskb;
+	int netnsid = -1;
+	int err;
+	u32 ext_filter_mask = 0;
+
+	err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
+	if (err < 0)
+		return err;
+
+	err = rtnl_ensure_unique_netns(tb, extack, true);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_TARGET_NETNSID]) {
+		netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
+		tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
+		if (IS_ERR(tgt_net))
+			return PTR_ERR(tgt_net);
+	}
+
+	if (tb[IFLA_EXT_MASK])
+		ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
+
+	err = -EINVAL;
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_index > 0)
+		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
+	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
+		dev = rtnl_dev_get(tgt_net, tb);
+	else
+		goto out;
+
+	err = -ENODEV;
+	if (dev == NULL)
+		goto out;
+
+	err = -ENOBUFS;
+	nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
+	if (nskb == NULL)
+		goto out;
+
+	err = rtnl_fill_ifinfo(nskb, dev, net,
+			       RTM_NEWLINK, NETLINK_CB(skb).portid,
+			       nlh->nlmsg_seq, 0, 0, ext_filter_mask,
+			       0, NULL, 0, netnsid, GFP_KERNEL);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in if_nlmsg_size */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(nskb);
+	} else
+		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
+out:
+	if (netnsid >= 0)
+		put_net(tgt_net);
+
+	return err;
+}
+
+static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
+			   bool *changed, struct netlink_ext_ack *extack)
+{
+	char *alt_ifname;
+	size_t size;
+	int err;
+
+	err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
+	if (err)
+		return err;
+
+	if (cmd == RTM_NEWLINKPROP) {
+		size = rtnl_prop_list_size(dev);
+		size += nla_total_size(ALTIFNAMSIZ);
+		if (size >= U16_MAX) {
+			NL_SET_ERR_MSG(extack,
+				       "effective property list too long");
+			return -EINVAL;
+		}
+	}
+
+	alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
+	if (!alt_ifname)
+		return -ENOMEM;
+
+	if (cmd == RTM_NEWLINKPROP) {
+		err = netdev_name_node_alt_create(dev, alt_ifname);
+		if (!err)
+			alt_ifname = NULL;
+	} else if (cmd == RTM_DELLINKPROP) {
+		err = netdev_name_node_alt_destroy(dev, alt_ifname);
+	} else {
+		WARN_ON_ONCE(1);
+		err = -EINVAL;
+	}
+
+	kfree(alt_ifname);
+	if (!err)
+		*changed = true;
+	return err;
+}
+
+static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
+			 struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct nlattr *tb[IFLA_MAX + 1];
+	struct net_device *dev;
+	struct ifinfomsg *ifm;
+	bool changed = false;
+	struct nlattr *attr;
+	int err, rem;
+
+	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
+	if (err)
+		return err;
+
+	err = rtnl_ensure_unique_netns(tb, extack, true);
+	if (err)
+		return err;
+
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_index > 0)
+		dev = __dev_get_by_index(net, ifm->ifi_index);
+	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
+		dev = rtnl_dev_get(net, tb);
+	else
+		return -EINVAL;
+
+	if (!dev)
+		return -ENODEV;
+
+	if (!tb[IFLA_PROP_LIST])
+		return 0;
+
+	nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
+		switch (nla_type(attr)) {
+		case IFLA_ALT_IFNAME:
+			err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
+			if (err)
+				return err;
+			break;
+		}
+	}
+
+	if (changed)
+		netdev_state_change(dev);
+	return 0;
+}
+
+static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
+			    struct netlink_ext_ack *extack)
+{
+	return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
+}
+
+static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
+			    struct netlink_ext_ack *extack)
+{
+	return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
+}
+
+static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+	struct net *net = sock_net(skb->sk);
+	size_t min_ifinfo_dump_size = 0;
+	struct nlattr *tb[IFLA_MAX+1];
+	u32 ext_filter_mask = 0;
+	struct net_device *dev;
+	int hdrlen;
+
+	/* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
+	hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
+		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
+
+	if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
+		if (tb[IFLA_EXT_MASK])
+			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
+	}
+
+	if (!ext_filter_mask)
+		return NLMSG_GOODSIZE;
+	/*
+	 * traverse the list of net devices and compute the minimum
+	 * buffer size based upon the filter mask.
+	 */
+	rcu_read_lock();
+	for_each_netdev_rcu(net, dev) {
+		min_ifinfo_dump_size = max(min_ifinfo_dump_size,
+					   if_nlmsg_size(dev, ext_filter_mask));
+	}
+	rcu_read_unlock();
+
+	return nlmsg_total_size(min_ifinfo_dump_size);
+}
+
+static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	int idx;
+	int s_idx = cb->family;
+	int type = cb->nlh->nlmsg_type - RTM_BASE;
+	int ret = 0;
+
+	if (s_idx == 0)
+		s_idx = 1;
+
+	for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
+		struct rtnl_link __rcu **tab;
+		struct rtnl_link *link;
+		rtnl_dumpit_func dumpit;
+
+		if (idx < s_idx || idx == PF_PACKET)
+			continue;
+
+		if (type < 0 || type >= RTM_NR_MSGTYPES)
+			continue;
+
+		tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
+		if (!tab)
+			continue;
+
+		link = rcu_dereference_rtnl(tab[type]);
+		if (!link)
+			continue;
+
+		dumpit = link->dumpit;
+		if (!dumpit)
+			continue;
+
+		if (idx > s_idx) {
+			memset(&cb->args[0], 0, sizeof(cb->args));
+			cb->prev_seq = 0;
+			cb->seq = 0;
+		}
+		ret = dumpit(skb, cb);
+		if (ret)
+			break;
+	}
+	cb->family = idx;
+
+	return skb->len ? : ret;
+}
+
+struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
+				       unsigned int change,
+				       u32 event, gfp_t flags, int *new_nsid,
+				       int new_ifindex)
+{
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
+	if (skb == NULL)
+		goto errout;
+
+	err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
+			       type, 0, 0, change, 0, 0, event,
+			       new_nsid, new_ifindex, -1, flags);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in if_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	return skb;
+errout:
+	if (err < 0)
+		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+	return NULL;
+}
+
+void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
+{
+	struct net *net = dev_net(dev);
+
+	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
+}
+
+static void rtmsg_ifinfo_event(int type, struct net_device *dev,
+			       unsigned int change, u32 event,
+			       gfp_t flags, int *new_nsid, int new_ifindex)
+{
+	struct sk_buff *skb;
+
+	if (dev->reg_state != NETREG_REGISTERED)
+		return;
+
+	skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
+				     new_ifindex);
+	if (skb)
+		rtmsg_ifinfo_send(skb, dev, flags);
+}
+
+void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
+		  gfp_t flags)
+{
+	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
+			   NULL, 0);
+}
+
+void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
+			 gfp_t flags, int *new_nsid, int new_ifindex)
+{
+	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
+			   new_nsid, new_ifindex);
+}
+
+static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
+				   struct net_device *dev,
+				   u8 *addr, u16 vid, u32 pid, u32 seq,
+				   int type, unsigned int flags,
+				   int nlflags, u16 ndm_state)
+{
+	struct nlmsghdr *nlh;
+	struct ndmsg *ndm;
+
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
+	if (!nlh)
+		return -EMSGSIZE;
+
+	ndm = nlmsg_data(nlh);
+	ndm->ndm_family  = AF_BRIDGE;
+	ndm->ndm_pad1	 = 0;
+	ndm->ndm_pad2    = 0;
+	ndm->ndm_flags	 = flags;
+	ndm->ndm_type	 = 0;
+	ndm->ndm_ifindex = dev->ifindex;
+	ndm->ndm_state   = ndm_state;
+
+	if (nla_put(skb, NDA_LLADDR, dev->addr_len, addr))
+		goto nla_put_failure;
+	if (vid)
+		if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
+			goto nla_put_failure;
+
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static inline size_t rtnl_fdb_nlmsg_size(const struct net_device *dev)
+{
+	return NLMSG_ALIGN(sizeof(struct ndmsg)) +
+	       nla_total_size(dev->addr_len) +	/* NDA_LLADDR */
+	       nla_total_size(sizeof(u16)) +	/* NDA_VLAN */
+	       0;
+}
+
+static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
+			    u16 ndm_state)
+{
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = nlmsg_new(rtnl_fdb_nlmsg_size(dev), GFP_ATOMIC);
+	if (!skb)
+		goto errout;
+
+	err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
+				      0, 0, type, NTF_SELF, 0, ndm_state);
+	if (err < 0) {
+		kfree_skb(skb);
+		goto errout;
+	}
+
+	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
+	return;
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+}
+
+/*
+ * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
+ */
+int ndo_dflt_fdb_add(struct ndmsg *ndm,
+		     struct nlattr *tb[],
+		     struct net_device *dev,
+		     const unsigned char *addr, u16 vid,
+		     u16 flags)
+{
+	int err = -EINVAL;
+
+	/* If aging addresses are supported device will need to
+	 * implement its own handler for this.
+	 */
+	if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
+		netdev_info(dev, "default FDB implementation only supports local addresses\n");
+		return err;
+	}
+
+	if (vid) {
+		netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
+		return err;
+	}
+
+	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
+		err = dev_uc_add_excl(dev, addr);
+	else if (is_multicast_ether_addr(addr))
+		err = dev_mc_add_excl(dev, addr);
+
+	/* Only return duplicate errors if NLM_F_EXCL is set */
+	if (err == -EEXIST && !(flags & NLM_F_EXCL))
+		err = 0;
+
+	return err;
+}
+EXPORT_SYMBOL(ndo_dflt_fdb_add);
+
+static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
+			 struct netlink_ext_ack *extack)
+{
+	u16 vid = 0;
+
+	if (vlan_attr) {
+		if (nla_len(vlan_attr) != sizeof(u16)) {
+			NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
+			return -EINVAL;
+		}
+
+		vid = nla_get_u16(vlan_attr);
+
+		if (!vid || vid >= VLAN_VID_MASK) {
+			NL_SET_ERR_MSG(extack, "invalid vlan id");
+			return -EINVAL;
+		}
+	}
+	*p_vid = vid;
+	return 0;
+}
+
+static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct ndmsg *ndm;
+	struct nlattr *tb[NDA_MAX+1];
+	struct net_device *dev;
+	u8 *addr;
+	u16 vid;
+	int err;
+
+	err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
+				     extack);
+	if (err < 0)
+		return err;
+
+	ndm = nlmsg_data(nlh);
+	if (ndm->ndm_ifindex == 0) {
+		NL_SET_ERR_MSG(extack, "invalid ifindex");
+		return -EINVAL;
+	}
+
+	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+	if (dev == NULL) {
+		NL_SET_ERR_MSG(extack, "unknown ifindex");
+		return -ENODEV;
+	}
+
+	if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
+		NL_SET_ERR_MSG(extack, "invalid address");
+		return -EINVAL;
+	}
+
+	if (dev->type != ARPHRD_ETHER) {
+		NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
+		return -EINVAL;
+	}
+
+	addr = nla_data(tb[NDA_LLADDR]);
+
+	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
+	if (err)
+		return err;
+
+	err = -EOPNOTSUPP;
+
+	/* Support fdb on master device the net/bridge default case */
+	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
+	    netif_is_bridge_port(dev)) {
+		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+		const struct net_device_ops *ops = br_dev->netdev_ops;
+
+		err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
+				       nlh->nlmsg_flags, extack);
+		if (err)
+			goto out;
+		else
+			ndm->ndm_flags &= ~NTF_MASTER;
+	}
+
+	/* Embedded bridge, macvlan, and any other device support */
+	if ((ndm->ndm_flags & NTF_SELF)) {
+		if (dev->netdev_ops->ndo_fdb_add)
+			err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
+							   vid,
+							   nlh->nlmsg_flags,
+							   extack);
+		else
+			err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
+					       nlh->nlmsg_flags);
+
+		if (!err) {
+			rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
+					ndm->ndm_state);
+			ndm->ndm_flags &= ~NTF_SELF;
+		}
+	}
+out:
+	return err;
+}
+
+/*
+ * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
+ */
+int ndo_dflt_fdb_del(struct ndmsg *ndm,
+		     struct nlattr *tb[],
+		     struct net_device *dev,
+		     const unsigned char *addr, u16 vid)
+{
+	int err = -EINVAL;
+
+	/* If aging addresses are supported device will need to
+	 * implement its own handler for this.
+	 */
+	if (!(ndm->ndm_state & NUD_PERMANENT)) {
+		netdev_info(dev, "default FDB implementation only supports local addresses\n");
+		return err;
+	}
+
+	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
+		err = dev_uc_del(dev, addr);
+	else if (is_multicast_ether_addr(addr))
+		err = dev_mc_del(dev, addr);
+
+	return err;
+}
+EXPORT_SYMBOL(ndo_dflt_fdb_del);
+
+static const struct nla_policy fdb_del_bulk_policy[NDA_MAX + 1] = {
+	[NDA_VLAN]	= { .type = NLA_U16 },
+	[NDA_IFINDEX]	= NLA_POLICY_MIN(NLA_S32, 1),
+	[NDA_NDM_STATE_MASK]	= { .type = NLA_U16  },
+	[NDA_NDM_FLAGS_MASK]	= { .type = NLA_U8 },
+};
+
+static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
+	struct net *net = sock_net(skb->sk);
+	const struct net_device_ops *ops;
+	struct ndmsg *ndm;
+	struct nlattr *tb[NDA_MAX+1];
+	struct net_device *dev;
+	__u8 *addr = NULL;
+	int err;
+	u16 vid;
+
+	if (!netlink_capable(skb, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (!del_bulk) {
+		err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
+					     NULL, extack);
+	} else {
+		err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX,
+				  fdb_del_bulk_policy, extack);
+	}
+	if (err < 0)
+		return err;
+
+	ndm = nlmsg_data(nlh);
+	if (ndm->ndm_ifindex == 0) {
+		NL_SET_ERR_MSG(extack, "invalid ifindex");
+		return -EINVAL;
+	}
+
+	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+	if (dev == NULL) {
+		NL_SET_ERR_MSG(extack, "unknown ifindex");
+		return -ENODEV;
+	}
+
+	if (!del_bulk) {
+		if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
+			NL_SET_ERR_MSG(extack, "invalid address");
+			return -EINVAL;
+		}
+		addr = nla_data(tb[NDA_LLADDR]);
+	}
+
+	if (dev->type != ARPHRD_ETHER) {
+		NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
+		return -EINVAL;
+	}
+
+	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
+	if (err)
+		return err;
+
+	err = -EOPNOTSUPP;
+
+	/* Support fdb on master device the net/bridge default case */
+	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
+	    netif_is_bridge_port(dev)) {
+		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+
+		ops = br_dev->netdev_ops;
+		if (!del_bulk) {
+			if (ops->ndo_fdb_del)
+				err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
+		} else {
+			if (ops->ndo_fdb_del_bulk)
+				err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
+							    extack);
+		}
+
+		if (err)
+			goto out;
+		else
+			ndm->ndm_flags &= ~NTF_MASTER;
+	}
+
+	/* Embedded bridge, macvlan, and any other device support */
+	if (ndm->ndm_flags & NTF_SELF) {
+		ops = dev->netdev_ops;
+		if (!del_bulk) {
+			if (ops->ndo_fdb_del)
+				err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
+			else
+				err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
+		} else {
+			/* in case err was cleared by NTF_MASTER call */
+			err = -EOPNOTSUPP;
+			if (ops->ndo_fdb_del_bulk)
+				err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
+							    extack);
+		}
+
+		if (!err) {
+			if (!del_bulk)
+				rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
+						ndm->ndm_state);
+			ndm->ndm_flags &= ~NTF_SELF;
+		}
+	}
+out:
+	return err;
+}
+
+static int nlmsg_populate_fdb(struct sk_buff *skb,
+			      struct netlink_callback *cb,
+			      struct net_device *dev,
+			      int *idx,
+			      struct netdev_hw_addr_list *list)
+{
+	struct netdev_hw_addr *ha;
+	int err;
+	u32 portid, seq;
+
+	portid = NETLINK_CB(cb->skb).portid;
+	seq = cb->nlh->nlmsg_seq;
+
+	list_for_each_entry(ha, &list->list, list) {
+		if (*idx < cb->args[2])
+			goto skip;
+
+		err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
+					      portid, seq,
+					      RTM_NEWNEIGH, NTF_SELF,
+					      NLM_F_MULTI, NUD_PERMANENT);
+		if (err < 0)
+			return err;
+skip:
+		*idx += 1;
+	}
+	return 0;
+}
+
+/**
+ * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
+ * @skb: socket buffer to store message in
+ * @cb: netlink callback
+ * @dev: netdevice
+ * @filter_dev: ignored
+ * @idx: the number of FDB table entries dumped is added to *@idx
+ *
+ * Default netdevice operation to dump the existing unicast address list.
+ * Returns number of addresses from list put in skb.
+ */
+int ndo_dflt_fdb_dump(struct sk_buff *skb,
+		      struct netlink_callback *cb,
+		      struct net_device *dev,
+		      struct net_device *filter_dev,
+		      int *idx)
+{
+	int err;
+
+	if (dev->type != ARPHRD_ETHER)
+		return -EINVAL;
+
+	netif_addr_lock_bh(dev);
+	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
+	if (err)
+		goto out;
+	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
+out:
+	netif_addr_unlock_bh(dev);
+	return err;
+}
+EXPORT_SYMBOL(ndo_dflt_fdb_dump);
+
+static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
+				 int *br_idx, int *brport_idx,
+				 struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[NDA_MAX + 1];
+	struct ndmsg *ndm;
+	int err, i;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
+		NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
+		return -EINVAL;
+	}
+
+	ndm = nlmsg_data(nlh);
+	if (ndm->ndm_pad1  || ndm->ndm_pad2  || ndm->ndm_state ||
+	    ndm->ndm_flags || ndm->ndm_type) {
+		NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
+					    NDA_MAX, NULL, extack);
+	if (err < 0)
+		return err;
+
+	*brport_idx = ndm->ndm_ifindex;
+	for (i = 0; i <= NDA_MAX; ++i) {
+		if (!tb[i])
+			continue;
+
+		switch (i) {
+		case NDA_IFINDEX:
+			if (nla_len(tb[i]) != sizeof(u32)) {
+				NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
+				return -EINVAL;
+			}
+			*brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
+			break;
+		case NDA_MASTER:
+			if (nla_len(tb[i]) != sizeof(u32)) {
+				NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
+				return -EINVAL;
+			}
+			*br_idx = nla_get_u32(tb[NDA_MASTER]);
+			break;
+		default:
+			NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
+				 int *br_idx, int *brport_idx,
+				 struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_MAX+1];
+	int err;
+
+	/* A hack to preserve kernel<->userspace interface.
+	 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
+	 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
+	 * So, check for ndmsg with an optional u32 attribute (not used here).
+	 * Fortunately these sizes don't conflict with the size of ifinfomsg
+	 * with an optional attribute.
+	 */
+	if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
+	    (nlmsg_len(nlh) != sizeof(struct ndmsg) +
+	     nla_attr_size(sizeof(u32)))) {
+		struct ifinfomsg *ifm;
+
+		err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
+					     tb, IFLA_MAX, ifla_policy,
+					     extack);
+		if (err < 0) {
+			return -EINVAL;
+		} else if (err == 0) {
+			if (tb[IFLA_MASTER])
+				*br_idx = nla_get_u32(tb[IFLA_MASTER]);
+		}
+
+		ifm = nlmsg_data(nlh);
+		*brport_idx = ifm->ifi_index;
+	}
+	return 0;
+}
+
+static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net_device *dev;
+	struct net_device *br_dev = NULL;
+	const struct net_device_ops *ops = NULL;
+	const struct net_device_ops *cops = NULL;
+	struct net *net = sock_net(skb->sk);
+	struct hlist_head *head;
+	int brport_idx = 0;
+	int br_idx = 0;
+	int h, s_h;
+	int idx = 0, s_idx;
+	int err = 0;
+	int fidx = 0;
+
+	if (cb->strict_check)
+		err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
+					    cb->extack);
+	else
+		err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
+					    cb->extack);
+	if (err < 0)
+		return err;
+
+	if (br_idx) {
+		br_dev = __dev_get_by_index(net, br_idx);
+		if (!br_dev)
+			return -ENODEV;
+
+		ops = br_dev->netdev_ops;
+	}
+
+	s_h = cb->args[0];
+	s_idx = cb->args[1];
+
+	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+		idx = 0;
+		head = &net->dev_index_head[h];
+		hlist_for_each_entry(dev, head, index_hlist) {
+
+			if (brport_idx && (dev->ifindex != brport_idx))
+				continue;
+
+			if (!br_idx) { /* user did not specify a specific bridge */
+				if (netif_is_bridge_port(dev)) {
+					br_dev = netdev_master_upper_dev_get(dev);
+					cops = br_dev->netdev_ops;
+				}
+			} else {
+				if (dev != br_dev &&
+				    !netif_is_bridge_port(dev))
+					continue;
+
+				if (br_dev != netdev_master_upper_dev_get(dev) &&
+				    !netif_is_bridge_master(dev))
+					continue;
+				cops = ops;
+			}
+
+			if (idx < s_idx)
+				goto cont;
+
+			if (netif_is_bridge_port(dev)) {
+				if (cops && cops->ndo_fdb_dump) {
+					err = cops->ndo_fdb_dump(skb, cb,
+								br_dev, dev,
+								&fidx);
+					if (err == -EMSGSIZE)
+						goto out;
+				}
+			}
+
+			if (dev->netdev_ops->ndo_fdb_dump)
+				err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
+								    dev, NULL,
+								    &fidx);
+			else
+				err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
+							&fidx);
+			if (err == -EMSGSIZE)
+				goto out;
+
+			cops = NULL;
+
+			/* reset fdb offset to 0 for rest of the interfaces */
+			cb->args[2] = 0;
+			fidx = 0;
+cont:
+			idx++;
+		}
+	}
+
+out:
+	cb->args[0] = h;
+	cb->args[1] = idx;
+	cb->args[2] = fidx;
+
+	return skb->len;
+}
+
+static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
+				struct nlattr **tb, u8 *ndm_flags,
+				int *br_idx, int *brport_idx, u8 **addr,
+				u16 *vid, struct netlink_ext_ack *extack)
+{
+	struct ndmsg *ndm;
+	int err, i;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
+		NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
+		return -EINVAL;
+	}
+
+	ndm = nlmsg_data(nlh);
+	if (ndm->ndm_pad1  || ndm->ndm_pad2  || ndm->ndm_state ||
+	    ndm->ndm_type) {
+		NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
+		return -EINVAL;
+	}
+
+	if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
+		NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
+					    NDA_MAX, nda_policy, extack);
+	if (err < 0)
+		return err;
+
+	*ndm_flags = ndm->ndm_flags;
+	*brport_idx = ndm->ndm_ifindex;
+	for (i = 0; i <= NDA_MAX; ++i) {
+		if (!tb[i])
+			continue;
+
+		switch (i) {
+		case NDA_MASTER:
+			*br_idx = nla_get_u32(tb[i]);
+			break;
+		case NDA_LLADDR:
+			if (nla_len(tb[i]) != ETH_ALEN) {
+				NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
+				return -EINVAL;
+			}
+			*addr = nla_data(tb[i]);
+			break;
+		case NDA_VLAN:
+			err = fdb_vid_parse(tb[i], vid, extack);
+			if (err)
+				return err;
+			break;
+		case NDA_VNI:
+			break;
+		default:
+			NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
+			struct netlink_ext_ack *extack)
+{
+	struct net_device *dev = NULL, *br_dev = NULL;
+	const struct net_device_ops *ops = NULL;
+	struct net *net = sock_net(in_skb->sk);
+	struct nlattr *tb[NDA_MAX + 1];
+	struct sk_buff *skb;
+	int brport_idx = 0;
+	u8 ndm_flags = 0;
+	int br_idx = 0;
+	u8 *addr = NULL;
+	u16 vid = 0;
+	int err;
+
+	err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
+				   &brport_idx, &addr, &vid, extack);
+	if (err < 0)
+		return err;
+
+	if (!addr) {
+		NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
+		return -EINVAL;
+	}
+
+	if (brport_idx) {
+		dev = __dev_get_by_index(net, brport_idx);
+		if (!dev) {
+			NL_SET_ERR_MSG(extack, "Unknown device ifindex");
+			return -ENODEV;
+		}
+	}
+
+	if (br_idx) {
+		if (dev) {
+			NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
+			return -EINVAL;
+		}
+
+		br_dev = __dev_get_by_index(net, br_idx);
+		if (!br_dev) {
+			NL_SET_ERR_MSG(extack, "Invalid master ifindex");
+			return -EINVAL;
+		}
+		ops = br_dev->netdev_ops;
+	}
+
+	if (dev) {
+		if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
+			if (!netif_is_bridge_port(dev)) {
+				NL_SET_ERR_MSG(extack, "Device is not a bridge port");
+				return -EINVAL;
+			}
+			br_dev = netdev_master_upper_dev_get(dev);
+			if (!br_dev) {
+				NL_SET_ERR_MSG(extack, "Master of device not found");
+				return -EINVAL;
+			}
+			ops = br_dev->netdev_ops;
+		} else {
+			if (!(ndm_flags & NTF_SELF)) {
+				NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
+				return -EINVAL;
+			}
+			ops = dev->netdev_ops;
+		}
+	}
+
+	if (!br_dev && !dev) {
+		NL_SET_ERR_MSG(extack, "No device specified");
+		return -ENODEV;
+	}
+
+	if (!ops || !ops->ndo_fdb_get) {
+		NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
+		return -EOPNOTSUPP;
+	}
+
+	skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (!skb)
+		return -ENOBUFS;
+
+	if (br_dev)
+		dev = br_dev;
+	err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
+			       NETLINK_CB(in_skb).portid,
+			       nlh->nlmsg_seq, extack);
+	if (err)
+		goto out;
+
+	return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
+out:
+	kfree_skb(skb);
+	return err;
+}
+
+static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
+			       unsigned int attrnum, unsigned int flag)
+{
+	if (mask & flag)
+		return nla_put_u8(skb, attrnum, !!(flags & flag));
+	return 0;
+}
+
+int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+			    struct net_device *dev, u16 mode,
+			    u32 flags, u32 mask, int nlflags,
+			    u32 filter_mask,
+			    int (*vlan_fill)(struct sk_buff *skb,
+					     struct net_device *dev,
+					     u32 filter_mask))
+{
+	struct nlmsghdr *nlh;
+	struct ifinfomsg *ifm;
+	struct nlattr *br_afspec;
+	struct nlattr *protinfo;
+	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+	struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+	int err = 0;
+
+	nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	ifm = nlmsg_data(nlh);
+	ifm->ifi_family = AF_BRIDGE;
+	ifm->__ifi_pad = 0;
+	ifm->ifi_type = dev->type;
+	ifm->ifi_index = dev->ifindex;
+	ifm->ifi_flags = dev_get_flags(dev);
+	ifm->ifi_change = 0;
+
+
+	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
+	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
+	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
+	    (br_dev &&
+	     nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
+	    (dev->addr_len &&
+	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
+	    (dev->ifindex != dev_get_iflink(dev) &&
+	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
+		goto nla_put_failure;
+
+	br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
+	if (!br_afspec)
+		goto nla_put_failure;
+
+	if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
+		nla_nest_cancel(skb, br_afspec);
+		goto nla_put_failure;
+	}
+
+	if (mode != BRIDGE_MODE_UNDEF) {
+		if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
+			nla_nest_cancel(skb, br_afspec);
+			goto nla_put_failure;
+		}
+	}
+	if (vlan_fill) {
+		err = vlan_fill(skb, dev, filter_mask);
+		if (err) {
+			nla_nest_cancel(skb, br_afspec);
+			goto nla_put_failure;
+		}
+	}
+	nla_nest_end(skb, br_afspec);
+
+	protinfo = nla_nest_start(skb, IFLA_PROTINFO);
+	if (!protinfo)
+		goto nla_put_failure;
+
+	if (brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_FAST_LEAVE,
+				BR_MULTICAST_FAST_LEAVE) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_LEARNING, BR_LEARNING) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
+	    brport_nla_put_flag(skb, flags, mask,
+				IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
+		nla_nest_cancel(skb, protinfo);
+		goto nla_put_failure;
+	}
+
+	nla_nest_end(skb, protinfo);
+
+	nlmsg_end(skb, nlh);
+	return 0;
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return err ? err : -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
+
+static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
+				    bool strict_check, u32 *filter_mask,
+				    struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_MAX+1];
+	int err, i;
+
+	if (strict_check) {
+		struct ifinfomsg *ifm;
+
+		if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
+			NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
+			return -EINVAL;
+		}
+
+		ifm = nlmsg_data(nlh);
+		if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
+		    ifm->ifi_change || ifm->ifi_index) {
+			NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
+			return -EINVAL;
+		}
+
+		err = nlmsg_parse_deprecated_strict(nlh,
+						    sizeof(struct ifinfomsg),
+						    tb, IFLA_MAX, ifla_policy,
+						    extack);
+	} else {
+		err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
+					     tb, IFLA_MAX, ifla_policy,
+					     extack);
+	}
+	if (err < 0)
+		return err;
+
+	/* new attributes should only be added with strict checking */
+	for (i = 0; i <= IFLA_MAX; ++i) {
+		if (!tb[i])
+			continue;
+
+		switch (i) {
+		case IFLA_EXT_MASK:
+			*filter_mask = nla_get_u32(tb[i]);
+			break;
+		default:
+			if (strict_check) {
+				NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
+				return -EINVAL;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct nlmsghdr *nlh = cb->nlh;
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev;
+	int idx = 0;
+	u32 portid = NETLINK_CB(cb->skb).portid;
+	u32 seq = nlh->nlmsg_seq;
+	u32 filter_mask = 0;
+	int err;
+
+	err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
+				       cb->extack);
+	if (err < 0 && cb->strict_check)
+		return err;
+
+	rcu_read_lock();
+	for_each_netdev_rcu(net, dev) {
+		const struct net_device_ops *ops = dev->netdev_ops;
+		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+
+		if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
+			if (idx >= cb->args[0]) {
+				err = br_dev->netdev_ops->ndo_bridge_getlink(
+						skb, portid, seq, dev,
+						filter_mask, NLM_F_MULTI);
+				if (err < 0 && err != -EOPNOTSUPP) {
+					if (likely(skb->len))
+						break;
+
+					goto out_err;
+				}
+			}
+			idx++;
+		}
+
+		if (ops->ndo_bridge_getlink) {
+			if (idx >= cb->args[0]) {
+				err = ops->ndo_bridge_getlink(skb, portid,
+							      seq, dev,
+							      filter_mask,
+							      NLM_F_MULTI);
+				if (err < 0 && err != -EOPNOTSUPP) {
+					if (likely(skb->len))
+						break;
+
+					goto out_err;
+				}
+			}
+			idx++;
+		}
+	}
+	err = skb->len;
+out_err:
+	rcu_read_unlock();
+	cb->args[0] = idx;
+
+	return err;
+}
+
+static inline size_t bridge_nlmsg_size(void)
+{
+	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+		+ nla_total_size(IFNAMSIZ)	/* IFLA_IFNAME */
+		+ nla_total_size(MAX_ADDR_LEN)	/* IFLA_ADDRESS */
+		+ nla_total_size(sizeof(u32))	/* IFLA_MASTER */
+		+ nla_total_size(sizeof(u32))	/* IFLA_MTU */
+		+ nla_total_size(sizeof(u32))	/* IFLA_LINK */
+		+ nla_total_size(sizeof(u32))	/* IFLA_OPERSTATE */
+		+ nla_total_size(sizeof(u8))	/* IFLA_PROTINFO */
+		+ nla_total_size(sizeof(struct nlattr))	/* IFLA_AF_SPEC */
+		+ nla_total_size(sizeof(u16))	/* IFLA_BRIDGE_FLAGS */
+		+ nla_total_size(sizeof(u16));	/* IFLA_BRIDGE_MODE */
+}
+
+static int rtnl_bridge_notify(struct net_device *dev)
+{
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -EOPNOTSUPP;
+
+	if (!dev->netdev_ops->ndo_bridge_getlink)
+		return 0;
+
+	skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
+	if (!skb) {
+		err = -ENOMEM;
+		goto errout;
+	}
+
+	err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
+	if (err < 0)
+		goto errout;
+
+	/* Notification info is only filled for bridge ports, not the bridge
+	 * device itself. Therefore, a zero notification length is valid and
+	 * should not result in an error.
+	 */
+	if (!skb->len)
+		goto errout;
+
+	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+	return 0;
+errout:
+	WARN_ON(err == -EMSGSIZE);
+	kfree_skb(skb);
+	if (err)
+		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+	return err;
+}
+
+static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			       struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct ifinfomsg *ifm;
+	struct net_device *dev;
+	struct nlattr *br_spec, *attr = NULL;
+	int rem, err = -EOPNOTSUPP;
+	u16 flags = 0;
+	bool have_flags = false;
+
+	if (nlmsg_len(nlh) < sizeof(*ifm))
+		return -EINVAL;
+
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_family != AF_BRIDGE)
+		return -EPFNOSUPPORT;
+
+	dev = __dev_get_by_index(net, ifm->ifi_index);
+	if (!dev) {
+		NL_SET_ERR_MSG(extack, "unknown ifindex");
+		return -ENODEV;
+	}
+
+	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (br_spec) {
+		nla_for_each_nested(attr, br_spec, rem) {
+			if (nla_type(attr) == IFLA_BRIDGE_FLAGS && !have_flags) {
+				if (nla_len(attr) < sizeof(flags))
+					return -EINVAL;
+
+				have_flags = true;
+				flags = nla_get_u16(attr);
+			}
+
+			if (nla_type(attr) == IFLA_BRIDGE_MODE) {
+				if (nla_len(attr) < sizeof(u16))
+					return -EINVAL;
+			}
+		}
+	}
+
+	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
+		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+
+		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+
+		err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
+							     extack);
+		if (err)
+			goto out;
+
+		flags &= ~BRIDGE_FLAGS_MASTER;
+	}
+
+	if ((flags & BRIDGE_FLAGS_SELF)) {
+		if (!dev->netdev_ops->ndo_bridge_setlink)
+			err = -EOPNOTSUPP;
+		else
+			err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
+								  flags,
+								  extack);
+		if (!err) {
+			flags &= ~BRIDGE_FLAGS_SELF;
+
+			/* Generate event to notify upper layer of bridge
+			 * change
+			 */
+			err = rtnl_bridge_notify(dev);
+		}
+	}
+
+	if (have_flags)
+		memcpy(nla_data(attr), &flags, sizeof(flags));
+out:
+	return err;
+}
+
+static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
+			       struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct ifinfomsg *ifm;
+	struct net_device *dev;
+	struct nlattr *br_spec, *attr = NULL;
+	int rem, err = -EOPNOTSUPP;
+	u16 flags = 0;
+	bool have_flags = false;
+
+	if (nlmsg_len(nlh) < sizeof(*ifm))
+		return -EINVAL;
+
+	ifm = nlmsg_data(nlh);
+	if (ifm->ifi_family != AF_BRIDGE)
+		return -EPFNOSUPPORT;
+
+	dev = __dev_get_by_index(net, ifm->ifi_index);
+	if (!dev) {
+		NL_SET_ERR_MSG(extack, "unknown ifindex");
+		return -ENODEV;
+	}
+
+	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (br_spec) {
+		nla_for_each_nested(attr, br_spec, rem) {
+			if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
+				if (nla_len(attr) < sizeof(flags))
+					return -EINVAL;
+
+				have_flags = true;
+				flags = nla_get_u16(attr);
+				break;
+			}
+		}
+	}
+
+	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
+		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+
+		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+
+		err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
+		if (err)
+			goto out;
+
+		flags &= ~BRIDGE_FLAGS_MASTER;
+	}
+
+	if ((flags & BRIDGE_FLAGS_SELF)) {
+		if (!dev->netdev_ops->ndo_bridge_dellink)
+			err = -EOPNOTSUPP;
+		else
+			err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
+								  flags);
+
+		if (!err) {
+			flags &= ~BRIDGE_FLAGS_SELF;
+
+			/* Generate event to notify upper layer of bridge
+			 * change
+			 */
+			err = rtnl_bridge_notify(dev);
+		}
+	}
+
+	if (have_flags)
+		memcpy(nla_data(attr), &flags, sizeof(flags));
+out:
+	return err;
+}
+
+static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
+{
+	return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
+	       (!idxattr || idxattr == attrid);
+}
+
+static bool
+rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
+{
+	return dev->netdev_ops &&
+	       dev->netdev_ops->ndo_has_offload_stats &&
+	       dev->netdev_ops->ndo_get_offload_stats &&
+	       dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
+{
+	return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
+	       sizeof(struct rtnl_link_stats64) : 0;
+}
+
+static int
+rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
+			     struct sk_buff *skb)
+{
+	unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
+	struct nlattr *attr = NULL;
+	void *attr_data;
+	int err;
+
+	if (!size)
+		return -ENODATA;
+
+	attr = nla_reserve_64bit(skb, attr_id, size,
+				 IFLA_OFFLOAD_XSTATS_UNSPEC);
+	if (!attr)
+		return -EMSGSIZE;
+
+	attr_data = nla_data(attr);
+	memset(attr_data, 0, size);
+
+	err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
+				   enum netdev_offload_xstats_type type)
+{
+	bool enabled = netdev_offload_xstats_enabled(dev, type);
+
+	return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
+}
+
+struct rtnl_offload_xstats_request_used {
+	bool request;
+	bool used;
+};
+
+static int
+rtnl_offload_xstats_get_stats(struct net_device *dev,
+			      enum netdev_offload_xstats_type type,
+			      struct rtnl_offload_xstats_request_used *ru,
+			      struct rtnl_hw_stats64 *stats,
+			      struct netlink_ext_ack *extack)
+{
+	bool request;
+	bool used;
+	int err;
+
+	request = netdev_offload_xstats_enabled(dev, type);
+	if (!request) {
+		used = false;
+		goto out;
+	}
+
+	err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
+	if (err)
+		return err;
+
+out:
+	if (ru) {
+		ru->request = request;
+		ru->used = used;
+	}
+	return 0;
+}
+
+static int
+rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
+				       struct rtnl_offload_xstats_request_used *ru)
+{
+	struct nlattr *nest;
+
+	nest = nla_nest_start(skb, attr_id);
+	if (!nest)
+		return -EMSGSIZE;
+
+	if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static int
+rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
+				   struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	struct rtnl_offload_xstats_request_used ru_l3;
+	struct nlattr *nest;
+	int err;
+
+	err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
+	if (err)
+		return err;
+
+	nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+	if (!nest)
+		return -EMSGSIZE;
+
+	if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
+						   IFLA_OFFLOAD_XSTATS_L3_STATS,
+						   &ru_l3))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
+				    int *prividx, u32 off_filter_mask,
+				    struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
+	int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
+	int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
+	bool have_data = false;
+	int err;
+
+	if (*prividx <= attr_id_cpu_hit &&
+	    (off_filter_mask &
+	     IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
+		err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
+		if (!err) {
+			have_data = true;
+		} else if (err != -ENODATA) {
+			*prividx = attr_id_cpu_hit;
+			return err;
+		}
+	}
+
+	if (*prividx <= attr_id_hw_s_info &&
+	    (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
+		*prividx = attr_id_hw_s_info;
+
+		err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
+		if (err)
+			return err;
+
+		have_data = true;
+		*prividx = 0;
+	}
+
+	if (*prividx <= attr_id_l3_stats &&
+	    (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
+		unsigned int size_l3;
+		struct nlattr *attr;
+
+		*prividx = attr_id_l3_stats;
+
+		size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
+		if (!size_l3)
+			goto skip_l3_stats;
+		attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
+					 IFLA_OFFLOAD_XSTATS_UNSPEC);
+		if (!attr)
+			return -EMSGSIZE;
+
+		err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
+						    nla_data(attr), extack);
+		if (err)
+			return err;
+
+		have_data = true;
+skip_l3_stats:
+		*prividx = 0;
+	}
+
+	if (!have_data)
+		return -ENODATA;
+
+	*prividx = 0;
+	return 0;
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
+					   enum netdev_offload_xstats_type type)
+{
+	return nla_total_size(0) +
+		/* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
+		nla_total_size(sizeof(u8)) +
+		/* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
+		nla_total_size(sizeof(u8)) +
+		0;
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+
+	return nla_total_size(0) +
+		/* IFLA_OFFLOAD_XSTATS_L3_STATS */
+		rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
+		0;
+}
+
+static int rtnl_offload_xstats_get_size(const struct net_device *dev,
+					u32 off_filter_mask)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
+	int nla_size = 0;
+	int size;
+
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
+		size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
+		nla_size += nla_total_size_64bit(size);
+	}
+
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
+		nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
+
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
+		size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
+		nla_size += nla_total_size_64bit(size);
+	}
+
+	if (nla_size != 0)
+		nla_size += nla_total_size(0);
+
+	return nla_size;
+}
+
+struct rtnl_stats_dump_filters {
+	/* mask[0] filters outer attributes. Then individual nests have their
+	 * filtering mask at the index of the nested attribute.
+	 */
+	u32 mask[IFLA_STATS_MAX + 1];
+};
+
+static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
+			       int type, u32 pid, u32 seq, u32 change,
+			       unsigned int flags,
+			       const struct rtnl_stats_dump_filters *filters,
+			       int *idxattr, int *prividx,
+			       struct netlink_ext_ack *extack)
+{
+	unsigned int filter_mask = filters->mask[0];
+	struct if_stats_msg *ifsm;
+	struct nlmsghdr *nlh;
+	struct nlattr *attr;
+	int s_prividx = *prividx;
+	int err;
+
+	ASSERT_RTNL();
+
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
+	if (!nlh)
+		return -EMSGSIZE;
+
+	ifsm = nlmsg_data(nlh);
+	ifsm->family = PF_UNSPEC;
+	ifsm->pad1 = 0;
+	ifsm->pad2 = 0;
+	ifsm->ifindex = dev->ifindex;
+	ifsm->filter_mask = filter_mask;
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
+		struct rtnl_link_stats64 *sp;
+
+		attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
+					 sizeof(struct rtnl_link_stats64),
+					 IFLA_STATS_UNSPEC);
+		if (!attr) {
+			err = -EMSGSIZE;
+			goto nla_put_failure;
+		}
+
+		sp = nla_data(attr);
+		dev_get_stats(dev, sp);
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
+		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+
+		if (ops && ops->fill_linkxstats) {
+			*idxattr = IFLA_STATS_LINK_XSTATS;
+			attr = nla_nest_start_noflag(skb,
+						     IFLA_STATS_LINK_XSTATS);
+			if (!attr) {
+				err = -EMSGSIZE;
+				goto nla_put_failure;
+			}
+
+			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
+			nla_nest_end(skb, attr);
+			if (err)
+				goto nla_put_failure;
+			*idxattr = 0;
+		}
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
+			     *idxattr)) {
+		const struct rtnl_link_ops *ops = NULL;
+		const struct net_device *master;
+
+		master = netdev_master_upper_dev_get(dev);
+		if (master)
+			ops = master->rtnl_link_ops;
+		if (ops && ops->fill_linkxstats) {
+			*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
+			attr = nla_nest_start_noflag(skb,
+						     IFLA_STATS_LINK_XSTATS_SLAVE);
+			if (!attr) {
+				err = -EMSGSIZE;
+				goto nla_put_failure;
+			}
+
+			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
+			nla_nest_end(skb, attr);
+			if (err)
+				goto nla_put_failure;
+			*idxattr = 0;
+		}
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
+			     *idxattr)) {
+		u32 off_filter_mask;
+
+		off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
+		*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
+		attr = nla_nest_start_noflag(skb,
+					     IFLA_STATS_LINK_OFFLOAD_XSTATS);
+		if (!attr) {
+			err = -EMSGSIZE;
+			goto nla_put_failure;
+		}
+
+		err = rtnl_offload_xstats_fill(skb, dev, prividx,
+					       off_filter_mask, extack);
+		if (err == -ENODATA)
+			nla_nest_cancel(skb, attr);
+		else
+			nla_nest_end(skb, attr);
+
+		if (err && err != -ENODATA)
+			goto nla_put_failure;
+		*idxattr = 0;
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
+		struct rtnl_af_ops *af_ops;
+
+		*idxattr = IFLA_STATS_AF_SPEC;
+		attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
+		if (!attr) {
+			err = -EMSGSIZE;
+			goto nla_put_failure;
+		}
+
+		rcu_read_lock();
+		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
+			if (af_ops->fill_stats_af) {
+				struct nlattr *af;
+
+				af = nla_nest_start_noflag(skb,
+							   af_ops->family);
+				if (!af) {
+					rcu_read_unlock();
+					err = -EMSGSIZE;
+					goto nla_put_failure;
+				}
+				err = af_ops->fill_stats_af(skb, dev);
+
+				if (err == -ENODATA) {
+					nla_nest_cancel(skb, af);
+				} else if (err < 0) {
+					rcu_read_unlock();
+					goto nla_put_failure;
+				}
+
+				nla_nest_end(skb, af);
+			}
+		}
+		rcu_read_unlock();
+
+		nla_nest_end(skb, attr);
+
+		*idxattr = 0;
+	}
+
+	nlmsg_end(skb, nlh);
+
+	return 0;
+
+nla_put_failure:
+	/* not a multi message or no progress mean a real error */
+	if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
+		nlmsg_cancel(skb, nlh);
+	else
+		nlmsg_end(skb, nlh);
+
+	return err;
+}
+
+static size_t if_nlmsg_stats_size(const struct net_device *dev,
+				  const struct rtnl_stats_dump_filters *filters)
+{
+	size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
+	unsigned int filter_mask = filters->mask[0];
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
+		size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
+		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+		int attr = IFLA_STATS_LINK_XSTATS;
+
+		if (ops && ops->get_linkxstats_size) {
+			size += nla_total_size(ops->get_linkxstats_size(dev,
+									attr));
+			/* for IFLA_STATS_LINK_XSTATS */
+			size += nla_total_size(0);
+		}
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
+		struct net_device *_dev = (struct net_device *)dev;
+		const struct rtnl_link_ops *ops = NULL;
+		const struct net_device *master;
+
+		/* netdev_master_upper_dev_get can't take const */
+		master = netdev_master_upper_dev_get(_dev);
+		if (master)
+			ops = master->rtnl_link_ops;
+		if (ops && ops->get_linkxstats_size) {
+			int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
+
+			size += nla_total_size(ops->get_linkxstats_size(dev,
+									attr));
+			/* for IFLA_STATS_LINK_XSTATS_SLAVE */
+			size += nla_total_size(0);
+		}
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
+		u32 off_filter_mask;
+
+		off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
+		size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
+	}
+
+	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
+		struct rtnl_af_ops *af_ops;
+
+		/* for IFLA_STATS_AF_SPEC */
+		size += nla_total_size(0);
+
+		rcu_read_lock();
+		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
+			if (af_ops->get_stats_af_size) {
+				size += nla_total_size(
+					af_ops->get_stats_af_size(dev));
+
+				/* for AF_* */
+				size += nla_total_size(0);
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	return size;
+}
+
+#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
+
+static const struct nla_policy
+rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
+	[IFLA_STATS_LINK_OFFLOAD_XSTATS] =
+		    NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
+};
+
+static const struct nla_policy
+rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
+	[IFLA_STATS_GET_FILTERS] =
+		    NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
+};
+
+static const struct nla_policy
+ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
+	[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
+};
+
+static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
+					struct rtnl_stats_dump_filters *filters,
+					struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_STATS_MAX + 1];
+	int err;
+	int at;
+
+	err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
+			       rtnl_stats_get_policy_filters, extack);
+	if (err < 0)
+		return err;
+
+	for (at = 1; at <= IFLA_STATS_MAX; at++) {
+		if (tb[at]) {
+			if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
+				NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
+				return -EINVAL;
+			}
+			filters->mask[at] = nla_get_u32(tb[at]);
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
+				u32 filter_mask,
+				struct rtnl_stats_dump_filters *filters,
+				struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
+	int err;
+	int i;
+
+	filters->mask[0] = filter_mask;
+	for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
+		filters->mask[i] = -1U;
+
+	err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
+			  IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_STATS_GET_FILTERS]) {
+		err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
+						   filters, extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
+				bool is_dump, struct netlink_ext_ack *extack)
+{
+	struct if_stats_msg *ifsm;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
+		NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
+		return -EINVAL;
+	}
+
+	if (!strict_check)
+		return 0;
+
+	ifsm = nlmsg_data(nlh);
+
+	/* only requests using strict checks can pass data to influence
+	 * the dump. The legacy exception is filter_mask.
+	 */
+	if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
+		NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
+		return -EINVAL;
+	}
+	if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
+		NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
+			  struct netlink_ext_ack *extack)
+{
+	struct rtnl_stats_dump_filters filters;
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev = NULL;
+	int idxattr = 0, prividx = 0;
+	struct if_stats_msg *ifsm;
+	struct sk_buff *nskb;
+	int err;
+
+	err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
+				   false, extack);
+	if (err)
+		return err;
+
+	ifsm = nlmsg_data(nlh);
+	if (ifsm->ifindex > 0)
+		dev = __dev_get_by_index(net, ifsm->ifindex);
+	else
+		return -EINVAL;
+
+	if (!dev)
+		return -ENODEV;
+
+	if (!ifsm->filter_mask) {
+		NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
+		return -EINVAL;
+	}
+
+	err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
+	if (err)
+		return err;
+
+	nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
+	if (!nskb)
+		return -ENOBUFS;
+
+	err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
+				  NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
+				  0, &filters, &idxattr, &prividx, extack);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(nskb);
+	} else {
+		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
+	}
+
+	return err;
+}
+
+static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct netlink_ext_ack *extack = cb->extack;
+	int h, s_h, err, s_idx, s_idxattr, s_prividx;
+	struct rtnl_stats_dump_filters filters;
+	struct net *net = sock_net(skb->sk);
+	unsigned int flags = NLM_F_MULTI;
+	struct if_stats_msg *ifsm;
+	struct hlist_head *head;
+	struct net_device *dev;
+	int idx = 0;
+
+	s_h = cb->args[0];
+	s_idx = cb->args[1];
+	s_idxattr = cb->args[2];
+	s_prividx = cb->args[3];
+
+	cb->seq = net->dev_base_seq;
+
+	err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
+	if (err)
+		return err;
+
+	ifsm = nlmsg_data(cb->nlh);
+	if (!ifsm->filter_mask) {
+		NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
+		return -EINVAL;
+	}
+
+	err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
+				   extack);
+	if (err)
+		return err;
+
+	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+		idx = 0;
+		head = &net->dev_index_head[h];
+		hlist_for_each_entry(dev, head, index_hlist) {
+			if (idx < s_idx)
+				goto cont;
+			err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
+						  NETLINK_CB(cb->skb).portid,
+						  cb->nlh->nlmsg_seq, 0,
+						  flags, &filters,
+						  &s_idxattr, &s_prividx,
+						  extack);
+			/* If we ran out of room on the first message,
+			 * we're in trouble
+			 */
+			WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
+
+			if (err < 0)
+				goto out;
+			s_prividx = 0;
+			s_idxattr = 0;
+			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
+cont:
+			idx++;
+		}
+	}
+out:
+	cb->args[3] = s_prividx;
+	cb->args[2] = s_idxattr;
+	cb->args[1] = idx;
+	cb->args[0] = h;
+
+	return skb->len;
+}
+
+void rtnl_offload_xstats_notify(struct net_device *dev)
+{
+	struct rtnl_stats_dump_filters response_filters = {};
+	struct net *net = dev_net(dev);
+	int idxattr = 0, prividx = 0;
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	ASSERT_RTNL();
+
+	response_filters.mask[0] |=
+		IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
+	response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
+		IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+
+	skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
+			GFP_KERNEL);
+	if (!skb)
+		goto errout;
+
+	err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
+				  &response_filters, &idxattr, &prividx, NULL);
+	if (err < 0) {
+		kfree_skb(skb);
+		goto errout;
+	}
+
+	rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
+	return;
+
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_STATS, err);
+}
+EXPORT_SYMBOL(rtnl_offload_xstats_notify);
+
+static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
+			  struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	struct rtnl_stats_dump_filters response_filters = {};
+	struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev = NULL;
+	struct if_stats_msg *ifsm;
+	bool notify = false;
+	int err;
+
+	err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
+				   false, extack);
+	if (err)
+		return err;
+
+	ifsm = nlmsg_data(nlh);
+	if (ifsm->family != AF_UNSPEC) {
+		NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
+		return -EINVAL;
+	}
+
+	if (ifsm->ifindex > 0)
+		dev = __dev_get_by_index(net, ifsm->ifindex);
+	else
+		return -EINVAL;
+
+	if (!dev)
+		return -ENODEV;
+
+	if (ifsm->filter_mask) {
+		NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
+			  ifla_stats_set_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
+		u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
+
+		if (req)
+			err = netdev_offload_xstats_enable(dev, t_l3, extack);
+		else
+			err = netdev_offload_xstats_disable(dev, t_l3);
+
+		if (!err)
+			notify = true;
+		else if (err != -EALREADY)
+			return err;
+
+		response_filters.mask[0] |=
+			IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
+		response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
+			IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+	}
+
+	if (notify)
+		rtnl_offload_xstats_notify(dev);
+
+	return 0;
+}
+
+/* Process one rtnetlink message. */
+
+static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
+			     struct netlink_ext_ack *extack)
+{
+	struct net *net = sock_net(skb->sk);
+	struct rtnl_link *link;
+	enum rtnl_kinds kind;
+	struct module *owner;
+	int err = -EOPNOTSUPP;
+	rtnl_doit_func doit;
+	unsigned int flags;
+	int family;
+	int type;
+
+	type = nlh->nlmsg_type;
+	if (type > RTM_MAX)
+		return -EOPNOTSUPP;
+
+	type -= RTM_BASE;
+
+	/* All the messages must have at least 1 byte length */
+	if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
+		return 0;
+
+	family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
+	kind = rtnl_msgtype_kind(type);
+
+	if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
+		return -EPERM;
+
+	rcu_read_lock();
+	if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
+		struct sock *rtnl;
+		rtnl_dumpit_func dumpit;
+		u32 min_dump_alloc = 0;
+
+		link = rtnl_get_link(family, type);
+		if (!link || !link->dumpit) {
+			family = PF_UNSPEC;
+			link = rtnl_get_link(family, type);
+			if (!link || !link->dumpit)
+				goto err_unlock;
+		}
+		owner = link->owner;
+		dumpit = link->dumpit;
+
+		if (type == RTM_GETLINK - RTM_BASE)
+			min_dump_alloc = rtnl_calcit(skb, nlh);
+
+		err = 0;
+		/* need to do this before rcu_read_unlock() */
+		if (!try_module_get(owner))
+			err = -EPROTONOSUPPORT;
+
+		rcu_read_unlock();
+
+		rtnl = net->rtnl;
+		if (err == 0) {
+			struct netlink_dump_control c = {
+				.dump		= dumpit,
+				.min_dump_alloc	= min_dump_alloc,
+				.module		= owner,
+			};
+			err = netlink_dump_start(rtnl, skb, nlh, &c);
+			/* netlink_dump_start() will keep a reference on
+			 * module if dump is still in progress.
+			 */
+			module_put(owner);
+		}
+		return err;
+	}
+
+	link = rtnl_get_link(family, type);
+	if (!link || !link->doit) {
+		family = PF_UNSPEC;
+		link = rtnl_get_link(PF_UNSPEC, type);
+		if (!link || !link->doit)
+			goto out_unlock;
+	}
+
+	owner = link->owner;
+	if (!try_module_get(owner)) {
+		err = -EPROTONOSUPPORT;
+		goto out_unlock;
+	}
+
+	flags = link->flags;
+	if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
+	    !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
+		NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
+		module_put(owner);
+		goto err_unlock;
+	}
+
+	if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
+		doit = link->doit;
+		rcu_read_unlock();
+		if (doit)
+			err = doit(skb, nlh, extack);
+		module_put(owner);
+		return err;
+	}
+	rcu_read_unlock();
+
+	rtnl_lock();
+	link = rtnl_get_link(family, type);
+	if (link && link->doit)
+		err = link->doit(skb, nlh, extack);
+	rtnl_unlock();
+
+	module_put(owner);
+
+	return err;
+
+out_unlock:
+	rcu_read_unlock();
+	return err;
+
+err_unlock:
+	rcu_read_unlock();
+	return -EOPNOTSUPP;
+}
+
+static void rtnetlink_rcv(struct sk_buff *skb)
+{
+	netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
+}
+
+static int rtnetlink_bind(struct net *net, int group)
+{
+	switch (group) {
+	case RTNLGRP_IPV4_MROUTE_R:
+	case RTNLGRP_IPV6_MROUTE_R:
+		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+		break;
+	}
+	return 0;
+}
+
+static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+	switch (event) {
+	case NETDEV_REBOOT:
+	case NETDEV_CHANGEMTU:
+	case NETDEV_CHANGEADDR:
+	case NETDEV_CHANGENAME:
+	case NETDEV_FEAT_CHANGE:
+	case NETDEV_BONDING_FAILOVER:
+	case NETDEV_POST_TYPE_CHANGE:
+	case NETDEV_NOTIFY_PEERS:
+	case NETDEV_CHANGEUPPER:
+	case NETDEV_RESEND_IGMP:
+	case NETDEV_CHANGEINFODATA:
+	case NETDEV_CHANGELOWERSTATE:
+	case NETDEV_CHANGE_TX_QUEUE_LEN:
+		rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
+				   GFP_KERNEL, NULL, 0);
+		break;
+	default:
+		break;
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block rtnetlink_dev_notifier = {
+	.notifier_call	= rtnetlink_event,
+};
+
+
+static int __net_init rtnetlink_net_init(struct net *net)
+{
+	struct sock *sk;
+	struct netlink_kernel_cfg cfg = {
+		.groups		= RTNLGRP_MAX,
+		.input		= rtnetlink_rcv,
+		.cb_mutex	= &rtnl_mutex,
+		.flags		= NL_CFG_F_NONROOT_RECV,
+		.bind		= rtnetlink_bind,
+	};
+
+	sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
+	if (!sk)
+		return -ENOMEM;
+	net->rtnl = sk;
+	return 0;
+}
+
+static void __net_exit rtnetlink_net_exit(struct net *net)
+{
+	netlink_kernel_release(net->rtnl);
+	net->rtnl = NULL;
+}
+
+static struct pernet_operations rtnetlink_net_ops = {
+	.init = rtnetlink_net_init,
+	.exit = rtnetlink_net_exit,
+};
+
+void __init rtnetlink_init(void)
+{
+	if (register_pernet_subsys(&rtnetlink_net_ops))
+		panic("rtnetlink_init: cannot initialize rtnetlink\n");
+
+	register_netdevice_notifier(&rtnetlink_dev_notifier);
+
+	rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
+		      rtnl_dump_ifinfo, 0);
+	rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
+	rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
+	rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
+
+	rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
+	rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
+	rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
+
+	rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
+	rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
+
+	rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
+	rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
+		      RTNL_FLAG_BULK_DEL_SUPPORTED);
+	rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
+
+	rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
+	rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
+	rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
+
+	rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
+		      0);
+	rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
+}