Initial import

1 files changed, 888 insertions, 0 deletions

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
new file mode 100644
index 000000000..4b5c23699
--- /dev/null
+++ b/net/bridge/br_netlink.c
@@ -0,0 +1,888 @@
+/*
+ *	Bridge netlink control interface
+ *
+ *	Authors:
+ *	Stephen Hemminger		<shemminger@osdl.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/etherdevice.h>
+#include <net/rtnetlink.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/switchdev.h>
+#include <uapi/linux/if_bridge.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+static int br_get_num_vlan_infos(const struct net_port_vlans *pv,
+				 u32 filter_mask)
+{
+	u16 vid_range_start = 0, vid_range_end = 0;
+	u16 vid_range_flags = 0;
+	u16 pvid, vid, flags;
+	int num_vlans = 0;
+
+	if (filter_mask & RTEXT_FILTER_BRVLAN)
+		return pv->num_vlans;
+
+	if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+		return 0;
+
+	/* Count number of vlan info's
+	 */
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		flags = 0;
+		if (vid == pvid)
+			flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (vid_range_start == 0) {
+			goto initvars;
+		} else if ((vid - vid_range_end) == 1 &&
+			flags == vid_range_flags) {
+			vid_range_end = vid;
+			continue;
+		} else {
+			if ((vid_range_end - vid_range_start) > 0)
+				num_vlans += 2;
+			else
+				num_vlans += 1;
+		}
+initvars:
+		vid_range_start = vid;
+		vid_range_end = vid;
+		vid_range_flags = flags;
+	}
+
+	if (vid_range_start != 0) {
+		if ((vid_range_end - vid_range_start) > 0)
+			num_vlans += 2;
+		else
+			num_vlans += 1;
+	}
+
+	return num_vlans;
+}
+
+static size_t br_get_link_af_size_filtered(const struct net_device *dev,
+					   u32 filter_mask)
+{
+	struct net_port_vlans *pv;
+	int num_vlan_infos;
+
+	rcu_read_lock();
+	if (br_port_exists(dev))
+		pv = nbp_get_vlan_info(br_port_get_rcu(dev));
+	else if (dev->priv_flags & IFF_EBRIDGE)
+		pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+	else
+		pv = NULL;
+	if (pv)
+		num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask);
+	else
+		num_vlan_infos = 0;
+	rcu_read_unlock();
+
+	if (!num_vlan_infos)
+		return 0;
+
+	/* Each VLAN is returned in bridge_vlan_info along with flags */
+	return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static inline size_t br_port_info_size(void)
+{
+	return nla_total_size(1)	/* IFLA_BRPORT_STATE  */
+		+ nla_total_size(2)	/* IFLA_BRPORT_PRIORITY */
+		+ nla_total_size(4)	/* IFLA_BRPORT_COST */
+		+ nla_total_size(1)	/* IFLA_BRPORT_MODE */
+		+ nla_total_size(1)	/* IFLA_BRPORT_GUARD */
+		+ nla_total_size(1)	/* IFLA_BRPORT_PROTECT */
+		+ nla_total_size(1)	/* IFLA_BRPORT_FAST_LEAVE */
+		+ nla_total_size(1)	/* IFLA_BRPORT_LEARNING */
+		+ nla_total_size(1)	/* IFLA_BRPORT_UNICAST_FLOOD */
+		+ 0;
+}
+
+static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
+{
+	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+		+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
+		+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+		+ nla_total_size(4) /* IFLA_MASTER */
+		+ nla_total_size(4) /* IFLA_MTU */
+		+ nla_total_size(4) /* IFLA_LINK */
+		+ nla_total_size(1) /* IFLA_OPERSTATE */
+		+ nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
+		+ nla_total_size(br_get_link_af_size_filtered(dev,
+				 filter_mask)); /* IFLA_AF_SPEC */
+}
+
+static int br_port_fill_attrs(struct sk_buff *skb,
+			      const struct net_bridge_port *p)
+{
+	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
+
+	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
+	    nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
+	    nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
+	    nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
+	    nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
+		       !!(p->flags & BR_PROXYARP_WIFI)))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
+				    u16 vid_end, u16 flags)
+{
+	struct  bridge_vlan_info vinfo;
+
+	if ((vid_end - vid_start) > 0) {
+		/* add range to skb */
+		vinfo.vid = vid_start;
+		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+
+		vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
+
+		vinfo.vid = vid_end;
+		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	} else {
+		vinfo.vid = vid_start;
+		vinfo.flags = flags;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
+					 const struct net_port_vlans *pv)
+{
+	u16 vid_range_start = 0, vid_range_end = 0;
+	u16 vid_range_flags = 0;
+	u16 pvid, vid, flags;
+	int err = 0;
+
+	/* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
+	 * and mark vlan info with begin and end flags
+	 * if vlaninfo represents a range
+	 */
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		flags = 0;
+		if (vid == pvid)
+			flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (vid_range_start == 0) {
+			goto initvars;
+		} else if ((vid - vid_range_end) == 1 &&
+			flags == vid_range_flags) {
+			vid_range_end = vid;
+			continue;
+		} else {
+			err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+						       vid_range_end,
+						       vid_range_flags);
+			if (err)
+				return err;
+		}
+
+initvars:
+		vid_range_start = vid;
+		vid_range_end = vid;
+		vid_range_flags = flags;
+	}
+
+	if (vid_range_start != 0) {
+		/* Call it once more to send any left over vlans */
+		err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+					       vid_range_end,
+					       vid_range_flags);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int br_fill_ifvlaninfo(struct sk_buff *skb,
+			      const struct net_port_vlans *pv)
+{
+	struct bridge_vlan_info vinfo;
+	u16 pvid, vid;
+
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		vinfo.vid = vid;
+		vinfo.flags = 0;
+		if (vid == pvid)
+			vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+/*
+ * Create one netlink message for one interface
+ * Contains port and master info as well as carrier and bridge state.
+ */
+static int br_fill_ifinfo(struct sk_buff *skb,
+			  const struct net_bridge_port *port,
+			  u32 pid, u32 seq, int event, unsigned int flags,
+			  u32 filter_mask, const struct net_device *dev)
+{
+	const struct net_bridge *br;
+	struct ifinfomsg *hdr;
+	struct nlmsghdr *nlh;
+	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+
+	if (port)
+		br = port->br;
+	else
+		br = netdev_priv(dev);
+
+	br_debug(br, "br_fill_info event %d port %s master %s\n",
+		     event, dev->name, br->dev->name);
+
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	hdr = nlmsg_data(nlh);
+	hdr->ifi_family = AF_BRIDGE;
+	hdr->__ifi_pad = 0;
+	hdr->ifi_type = dev->type;
+	hdr->ifi_index = dev->ifindex;
+	hdr->ifi_flags = dev_get_flags(dev);
+	hdr->ifi_change = 0;
+
+	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
+	    nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
+	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
+	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
+	    (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;
+
+	if (event == RTM_NEWLINK && port) {
+		struct nlattr *nest
+			= nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
+
+		if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
+			goto nla_put_failure;
+		nla_nest_end(skb, nest);
+	}
+
+	/* Check if  the VID information is requested */
+	if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
+	    (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
+		const struct net_port_vlans *pv;
+		struct nlattr *af;
+		int err;
+
+		if (port)
+			pv = nbp_get_vlan_info(port);
+		else
+			pv = br_get_vlan_info(br);
+
+		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
+			goto done;
+
+		af = nla_nest_start(skb, IFLA_AF_SPEC);
+		if (!af)
+			goto nla_put_failure;
+
+		if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
+			err = br_fill_ifvlaninfo_compressed(skb, pv);
+		else
+			err = br_fill_ifvlaninfo(skb, pv);
+		if (err)
+			goto nla_put_failure;
+		nla_nest_end(skb, af);
+	}
+
+done:
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+/*
+ * Notify listeners of a change in port information
+ */
+void br_ifinfo_notify(int event, struct net_bridge_port *port)
+{
+	struct net *net;
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+	u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
+
+	if (!port)
+		return;
+
+	net = dev_net(port->dev);
+	br_debug(port->br, "port %u(%s) event %d\n",
+		 (unsigned int)port->port_no, port->dev->name, event);
+
+	skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
+	if (skb == NULL)
+		goto errout;
+
+	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in br_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+	return;
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+}
+
+
+/*
+ * Dump information about all ports, in response to GETLINK
+ */
+int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+	       struct net_device *dev, u32 filter_mask, int nlflags)
+{
+	struct net_bridge_port *port = br_port_get_rtnl(dev);
+
+	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
+	    !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+		return 0;
+
+	return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
+			      filter_mask, dev);
+}
+
+static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
+			int cmd, struct bridge_vlan_info *vinfo)
+{
+	int err = 0;
+
+	switch (cmd) {
+	case RTM_SETLINK:
+		if (p) {
+			err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
+			if (err)
+				break;
+
+			if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+				err = br_vlan_add(p->br, vinfo->vid,
+						  vinfo->flags);
+		} else {
+			err = br_vlan_add(br, vinfo->vid, vinfo->flags);
+		}
+		break;
+
+	case RTM_DELLINK:
+		if (p) {
+			nbp_vlan_delete(p, vinfo->vid);
+			if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+				br_vlan_delete(p->br, vinfo->vid);
+		} else {
+			br_vlan_delete(br, vinfo->vid);
+		}
+		break;
+	}
+
+	return err;
+}
+
+static int br_afspec(struct net_bridge *br,
+		     struct net_bridge_port *p,
+		     struct nlattr *af_spec,
+		     int cmd)
+{
+	struct bridge_vlan_info *vinfo_start = NULL;
+	struct bridge_vlan_info *vinfo = NULL;
+	struct nlattr *attr;
+	int err = 0;
+	int rem;
+
+	nla_for_each_nested(attr, af_spec, rem) {
+		if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
+			continue;
+		if (nla_len(attr) != sizeof(struct bridge_vlan_info))
+			return -EINVAL;
+		vinfo = nla_data(attr);
+		if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
+			if (vinfo_start)
+				return -EINVAL;
+			vinfo_start = vinfo;
+			continue;
+		}
+
+		if (vinfo_start) {
+			struct bridge_vlan_info tmp_vinfo;
+			int v;
+
+			if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
+				return -EINVAL;
+
+			if (vinfo->vid <= vinfo_start->vid)
+				return -EINVAL;
+
+			memcpy(&tmp_vinfo, vinfo_start,
+			       sizeof(struct bridge_vlan_info));
+
+			for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
+				tmp_vinfo.vid = v;
+				err = br_vlan_info(br, p, cmd, &tmp_vinfo);
+				if (err)
+					break;
+			}
+			vinfo_start = NULL;
+		} else {
+			err = br_vlan_info(br, p, cmd, vinfo);
+		}
+		if (err)
+			break;
+	}
+
+	return err;
+}
+
+static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
+	[IFLA_BRPORT_STATE]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_COST]	= { .type = NLA_U32 },
+	[IFLA_BRPORT_PRIORITY]	= { .type = NLA_U16 },
+	[IFLA_BRPORT_MODE]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_GUARD]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_PROTECT]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
+	[IFLA_BRPORT_LEARNING]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
+};
+
+/* Change the state of the port and notify spanning tree */
+static int br_set_port_state(struct net_bridge_port *p, u8 state)
+{
+	if (state > BR_STATE_BLOCKING)
+		return -EINVAL;
+
+	/* if kernel STP is running, don't allow changes */
+	if (p->br->stp_enabled == BR_KERNEL_STP)
+		return -EBUSY;
+
+	/* if device is not up, change is not allowed
+	 * if link is not present, only allowable state is disabled
+	 */
+	if (!netif_running(p->dev) ||
+	    (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
+		return -ENETDOWN;
+
+	br_set_state(p, state);
+	br_log_state(p);
+	br_port_state_selection(p->br);
+	return 0;
+}
+
+/* Set/clear or port flags based on attribute */
+static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
+			   int attrtype, unsigned long mask)
+{
+	if (tb[attrtype]) {
+		u8 flag = nla_get_u8(tb[attrtype]);
+		if (flag)
+			p->flags |= mask;
+		else
+			p->flags &= ~mask;
+	}
+}
+
+/* Process bridge protocol info on port */
+static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
+{
+	int err;
+	unsigned long old_flags = p->flags;
+
+	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
+	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
+	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
+	br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
+	br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
+
+	if (tb[IFLA_BRPORT_COST]) {
+		err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
+		if (err)
+			return err;
+	}
+
+	if (tb[IFLA_BRPORT_PRIORITY]) {
+		err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
+		if (err)
+			return err;
+	}
+
+	if (tb[IFLA_BRPORT_STATE]) {
+		err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
+		if (err)
+			return err;
+	}
+
+	br_port_flags_change(p, old_flags ^ p->flags);
+	return 0;
+}
+
+/* Change state and parameters on port. */
+int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+	struct nlattr *protinfo;
+	struct nlattr *afspec;
+	struct net_bridge_port *p;
+	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
+	int err = 0, ret_offload = 0;
+
+	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
+	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (!protinfo && !afspec)
+		return 0;
+
+	p = br_port_get_rtnl(dev);
+	/* We want to accept dev as bridge itself if the AF_SPEC
+	 * is set to see if someone is setting vlan info on the bridge
+	 */
+	if (!p && !afspec)
+		return -EINVAL;
+
+	if (p && protinfo) {
+		if (protinfo->nla_type & NLA_F_NESTED) {
+			err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
+					       protinfo, br_port_policy);
+			if (err)
+				return err;
+
+			spin_lock_bh(&p->br->lock);
+			err = br_setport(p, tb);
+			spin_unlock_bh(&p->br->lock);
+		} else {
+			/* Binary compatibility with old RSTP */
+			if (nla_len(protinfo) < sizeof(u8))
+				return -EINVAL;
+
+			spin_lock_bh(&p->br->lock);
+			err = br_set_port_state(p, nla_get_u8(protinfo));
+			spin_unlock_bh(&p->br->lock);
+		}
+		if (err)
+			goto out;
+	}
+
+	if (afspec) {
+		err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+				afspec, RTM_SETLINK);
+	}
+
+	if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+		/* set bridge attributes in hardware if supported
+		 */
+		ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
+								flags);
+		if (ret_offload && ret_offload != -EOPNOTSUPP)
+			br_warn(p->br, "error setting attrs on port %u(%s)\n",
+				(unsigned int)p->port_no, p->dev->name);
+	}
+
+	if (err == 0)
+		br_ifinfo_notify(RTM_NEWLINK, p);
+out:
+	return err;
+}
+
+/* Delete port information */
+int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+	struct nlattr *afspec;
+	struct net_bridge_port *p;
+	int err = 0, ret_offload = 0;
+
+	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (!afspec)
+		return 0;
+
+	p = br_port_get_rtnl(dev);
+	/* We want to accept dev as bridge itself as well */
+	if (!p && !(dev->priv_flags & IFF_EBRIDGE))
+		return -EINVAL;
+
+	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+			afspec, RTM_DELLINK);
+	if (err == 0)
+		/* Send RTM_NEWLINK because userspace
+		 * expects RTM_NEWLINK for vlan dels
+		 */
+		br_ifinfo_notify(RTM_NEWLINK, p);
+
+	if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+		/* del bridge attributes in hardware
+		 */
+		ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
+								flags);
+		if (ret_offload && ret_offload != -EOPNOTSUPP)
+			br_warn(p->br, "error deleting attrs on port %u (%s)\n",
+				(unsigned int)p->port_no, p->dev->name);
+	}
+
+	return err;
+}
+static int br_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+	if (tb[IFLA_ADDRESS]) {
+		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+			return -EINVAL;
+		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+			return -EADDRNOTAVAIL;
+	}
+
+	return 0;
+}
+
+static int br_dev_newlink(struct net *src_net, struct net_device *dev,
+			  struct nlattr *tb[], struct nlattr *data[])
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	if (tb[IFLA_ADDRESS]) {
+		spin_lock_bh(&br->lock);
+		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
+		spin_unlock_bh(&br->lock);
+	}
+
+	return register_netdevice(dev);
+}
+
+static int br_port_slave_changelink(struct net_device *brdev,
+				    struct net_device *dev,
+				    struct nlattr *tb[],
+				    struct nlattr *data[])
+{
+	if (!data)
+		return 0;
+	return br_setport(br_port_get_rtnl(dev), data);
+}
+
+static int br_port_fill_slave_info(struct sk_buff *skb,
+				   const struct net_device *brdev,
+				   const struct net_device *dev)
+{
+	return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
+}
+
+static size_t br_port_get_slave_size(const struct net_device *brdev,
+				     const struct net_device *dev)
+{
+	return br_port_info_size();
+}
+
+static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
+	[IFLA_BR_FORWARD_DELAY]	= { .type = NLA_U32 },
+	[IFLA_BR_HELLO_TIME]	= { .type = NLA_U32 },
+	[IFLA_BR_MAX_AGE]	= { .type = NLA_U32 },
+	[IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
+	[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
+	[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
+};
+
+static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
+			 struct nlattr *data[])
+{
+	struct net_bridge *br = netdev_priv(brdev);
+	int err;
+
+	if (!data)
+		return 0;
+
+	if (data[IFLA_BR_FORWARD_DELAY]) {
+		err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_HELLO_TIME]) {
+		err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_MAX_AGE]) {
+		err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_AGEING_TIME]) {
+		u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
+
+		br->ageing_time = clock_t_to_jiffies(ageing_time);
+	}
+
+	if (data[IFLA_BR_STP_STATE]) {
+		u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
+
+		br_stp_set_enabled(br, stp_enabled);
+	}
+
+	if (data[IFLA_BR_PRIORITY]) {
+		u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
+
+		br_stp_set_bridge_priority(br, priority);
+	}
+
+	return 0;
+}
+
+static size_t br_get_size(const struct net_device *brdev)
+{
+	return nla_total_size(sizeof(u32)) +	/* IFLA_BR_FORWARD_DELAY  */
+	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_HELLO_TIME */
+	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_MAX_AGE */
+	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
+	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
+	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
+	       0;
+}
+
+static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
+{
+	struct net_bridge *br = netdev_priv(brdev);
+	u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
+	u32 hello_time = jiffies_to_clock_t(br->hello_time);
+	u32 age_time = jiffies_to_clock_t(br->max_age);
+	u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
+	u32 stp_enabled = br->stp_enabled;
+	u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
+
+	if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
+	    nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
+	    nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
+	    nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
+	    nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
+	    nla_put_u16(skb, IFLA_BR_PRIORITY, priority))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static size_t br_get_link_af_size(const struct net_device *dev)
+{
+	struct net_port_vlans *pv;
+
+	if (br_port_exists(dev))
+		pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
+	else if (dev->priv_flags & IFF_EBRIDGE)
+		pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+	else
+		return 0;
+
+	if (!pv)
+		return 0;
+
+	/* Each VLAN is returned in bridge_vlan_info along with flags */
+	return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static struct rtnl_af_ops br_af_ops __read_mostly = {
+	.family			= AF_BRIDGE,
+	.get_link_af_size	= br_get_link_af_size,
+};
+
+struct rtnl_link_ops br_link_ops __read_mostly = {
+	.kind			= "bridge",
+	.priv_size		= sizeof(struct net_bridge),
+	.setup			= br_dev_setup,
+	.maxtype		= IFLA_BRPORT_MAX,
+	.policy			= br_policy,
+	.validate		= br_validate,
+	.newlink		= br_dev_newlink,
+	.changelink		= br_changelink,
+	.dellink		= br_dev_delete,
+	.get_size		= br_get_size,
+	.fill_info		= br_fill_info,
+
+	.slave_maxtype		= IFLA_BRPORT_MAX,
+	.slave_policy		= br_port_policy,
+	.slave_changelink	= br_port_slave_changelink,
+	.get_slave_size		= br_port_get_slave_size,
+	.fill_slave_info	= br_port_fill_slave_info,
+};
+
+int __init br_netlink_init(void)
+{
+	int err;
+
+	br_mdb_init();
+	rtnl_af_register(&br_af_ops);
+
+	err = rtnl_link_register(&br_link_ops);
+	if (err)
+		goto out_af;
+
+	return 0;
+
+out_af:
+	rtnl_af_unregister(&br_af_ops);
+	br_mdb_uninit();
+	return err;
+}
+
+void br_netlink_fini(void)
+{
+	br_mdb_uninit();
+	rtnl_af_unregister(&br_af_ops);
+	rtnl_link_unregister(&br_link_ops);
+}