2 * Bridge netlink control interface
5 * Stephen Hemminger <shemminger@osdl.org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/etherdevice.h>
16 #include <net/rtnetlink.h>
17 #include <net/net_namespace.h>
19 #include <uapi/linux/if_bridge.h>
21 #include "br_private.h"
22 #include "br_private_stp.h"
24 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
27 struct net_bridge_vlan *v;
28 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
32 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
35 pvid = br_get_pvid(vg);
36 /* Count number of vlan infos */
37 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
39 /* only a context, bridge vlan not activated */
40 if (!br_vlan_should_use(v))
43 flags |= BRIDGE_VLAN_INFO_PVID;
45 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
46 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
48 if (vid_range_start == 0) {
50 } else if ((v->vid - vid_range_end) == 1 &&
51 flags == vid_range_flags) {
52 vid_range_end = v->vid;
55 if ((vid_range_end - vid_range_start) > 0)
61 vid_range_start = v->vid;
62 vid_range_end = v->vid;
63 vid_range_flags = flags;
66 if (vid_range_start != 0) {
67 if ((vid_range_end - vid_range_start) > 0)
76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
84 if (filter_mask & RTEXT_FILTER_BRVLAN)
88 num_vlans = __get_num_vlan_infos(vg, filter_mask);
94 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
97 struct net_bridge_vlan_group *vg = NULL;
98 struct net_bridge_port *p;
99 struct net_bridge *br;
103 if (br_port_exists(dev)) {
104 p = br_port_get_rcu(dev);
105 vg = nbp_vlan_group(p);
106 } else if (dev->priv_flags & IFF_EBRIDGE) {
107 br = netdev_priv(dev);
108 vg = br_vlan_group(br);
110 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
113 /* Each VLAN is returned in bridge_vlan_info along with flags */
114 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
117 static inline size_t br_port_info_size(void)
119 return nla_total_size(1) /* IFLA_BRPORT_STATE */
120 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
121 + nla_total_size(4) /* IFLA_BRPORT_COST */
122 + nla_total_size(1) /* IFLA_BRPORT_MODE */
123 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
124 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
125 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
126 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
127 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
128 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
130 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
131 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
132 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
133 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
134 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
135 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
136 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
137 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
138 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
139 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
140 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
141 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
142 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
147 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
149 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
150 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
151 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
152 + nla_total_size(4) /* IFLA_MASTER */
153 + nla_total_size(4) /* IFLA_MTU */
154 + nla_total_size(4) /* IFLA_LINK */
155 + nla_total_size(1) /* IFLA_OPERSTATE */
156 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
157 + nla_total_size(br_get_link_af_size_filtered(dev,
158 filter_mask)); /* IFLA_AF_SPEC */
161 static int br_port_fill_attrs(struct sk_buff *skb,
162 const struct net_bridge_port *p)
164 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
167 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
168 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
169 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
170 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
171 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
172 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
173 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
174 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
175 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
176 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
177 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
178 !!(p->flags & BR_PROXYARP_WIFI)) ||
179 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
180 &p->designated_root) ||
181 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
182 &p->designated_bridge) ||
183 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
184 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
185 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
186 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
187 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
188 p->topology_change_ack) ||
189 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
192 timerval = br_timer_value(&p->message_age_timer);
193 if (nla_put_u64(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval))
195 timerval = br_timer_value(&p->forward_delay_timer);
196 if (nla_put_u64(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval))
198 timerval = br_timer_value(&p->hold_timer);
199 if (nla_put_u64(skb, IFLA_BRPORT_HOLD_TIMER, timerval))
202 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
203 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
204 p->multicast_router))
211 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
212 u16 vid_end, u16 flags)
214 struct bridge_vlan_info vinfo;
216 if ((vid_end - vid_start) > 0) {
217 /* add range to skb */
218 vinfo.vid = vid_start;
219 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
220 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
221 sizeof(vinfo), &vinfo))
222 goto nla_put_failure;
225 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
226 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
227 sizeof(vinfo), &vinfo))
228 goto nla_put_failure;
230 vinfo.vid = vid_start;
232 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
233 sizeof(vinfo), &vinfo))
234 goto nla_put_failure;
243 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
244 struct net_bridge_vlan_group *vg)
246 struct net_bridge_vlan *v;
247 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
251 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
252 * and mark vlan info with begin and end flags
253 * if vlaninfo represents a range
255 pvid = br_get_pvid(vg);
256 list_for_each_entry(v, &vg->vlan_list, vlist) {
258 if (!br_vlan_should_use(v))
261 flags |= BRIDGE_VLAN_INFO_PVID;
263 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
264 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
266 if (vid_range_start == 0) {
268 } else if ((v->vid - vid_range_end) == 1 &&
269 flags == vid_range_flags) {
270 vid_range_end = v->vid;
273 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
281 vid_range_start = v->vid;
282 vid_range_end = v->vid;
283 vid_range_flags = flags;
286 if (vid_range_start != 0) {
287 /* Call it once more to send any left over vlans */
288 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
298 static int br_fill_ifvlaninfo(struct sk_buff *skb,
299 struct net_bridge_vlan_group *vg)
301 struct bridge_vlan_info vinfo;
302 struct net_bridge_vlan *v;
305 pvid = br_get_pvid(vg);
306 list_for_each_entry(v, &vg->vlan_list, vlist) {
307 if (!br_vlan_should_use(v))
313 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
315 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
316 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
318 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
319 sizeof(vinfo), &vinfo))
320 goto nla_put_failure;
330 * Create one netlink message for one interface
331 * Contains port and master info as well as carrier and bridge state.
333 static int br_fill_ifinfo(struct sk_buff *skb,
334 struct net_bridge_port *port,
335 u32 pid, u32 seq, int event, unsigned int flags,
336 u32 filter_mask, const struct net_device *dev)
338 struct net_bridge *br;
339 struct ifinfomsg *hdr;
340 struct nlmsghdr *nlh;
341 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
346 br = netdev_priv(dev);
348 br_debug(br, "br_fill_info event %d port %s master %s\n",
349 event, dev->name, br->dev->name);
351 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
355 hdr = nlmsg_data(nlh);
356 hdr->ifi_family = AF_BRIDGE;
358 hdr->ifi_type = dev->type;
359 hdr->ifi_index = dev->ifindex;
360 hdr->ifi_flags = dev_get_flags(dev);
363 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
364 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
365 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
366 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
368 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
369 (dev->ifindex != dev_get_iflink(dev) &&
370 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
371 goto nla_put_failure;
373 if (event == RTM_NEWLINK && port) {
375 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
377 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
378 goto nla_put_failure;
379 nla_nest_end(skb, nest);
382 /* Check if the VID information is requested */
383 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
384 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
385 struct net_bridge_vlan_group *vg;
390 vg = nbp_vlan_group(port);
392 vg = br_vlan_group(br);
394 if (!vg || !vg->num_vlans)
397 af = nla_nest_start(skb, IFLA_AF_SPEC);
399 goto nla_put_failure;
401 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
402 err = br_fill_ifvlaninfo_compressed(skb, vg);
404 err = br_fill_ifvlaninfo(skb, vg);
406 goto nla_put_failure;
407 nla_nest_end(skb, af);
415 nlmsg_cancel(skb, nlh);
420 * Notify listeners of a change in port information
422 void br_ifinfo_notify(int event, struct net_bridge_port *port)
427 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
432 net = dev_net(port->dev);
433 br_debug(port->br, "port %u(%s) event %d\n",
434 (unsigned int)port->port_no, port->dev->name, event);
436 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
440 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
442 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
443 WARN_ON(err == -EMSGSIZE);
447 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
450 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
455 * Dump information about all ports, in response to GETLINK
457 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
458 struct net_device *dev, u32 filter_mask, int nlflags)
460 struct net_bridge_port *port = br_port_get_rtnl(dev);
462 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
463 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
466 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
470 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
471 int cmd, struct bridge_vlan_info *vinfo)
478 /* if the MASTER flag is set this will act on the global
479 * per-VLAN entry as well
481 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
485 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
486 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
492 nbp_vlan_delete(p, vinfo->vid);
493 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
494 br_vlan_delete(p->br, vinfo->vid);
496 br_vlan_delete(br, vinfo->vid);
504 static int br_afspec(struct net_bridge *br,
505 struct net_bridge_port *p,
506 struct nlattr *af_spec,
509 struct bridge_vlan_info *vinfo_start = NULL;
510 struct bridge_vlan_info *vinfo = NULL;
515 nla_for_each_nested(attr, af_spec, rem) {
516 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
518 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
520 vinfo = nla_data(attr);
521 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
523 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
527 /* don't allow range of pvids */
528 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
534 struct bridge_vlan_info tmp_vinfo;
537 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
540 if (vinfo->vid <= vinfo_start->vid)
543 memcpy(&tmp_vinfo, vinfo_start,
544 sizeof(struct bridge_vlan_info));
546 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
548 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
554 err = br_vlan_info(br, p, cmd, vinfo);
563 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
564 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
565 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
566 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
567 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
568 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
569 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
570 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
571 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
572 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
573 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
574 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
575 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
578 /* Change the state of the port and notify spanning tree */
579 static int br_set_port_state(struct net_bridge_port *p, u8 state)
581 if (state > BR_STATE_BLOCKING)
584 /* if kernel STP is running, don't allow changes */
585 if (p->br->stp_enabled == BR_KERNEL_STP)
588 /* if device is not up, change is not allowed
589 * if link is not present, only allowable state is disabled
591 if (!netif_running(p->dev) ||
592 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
595 br_set_state(p, state);
597 br_port_state_selection(p->br);
601 /* Set/clear or port flags based on attribute */
602 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
603 int attrtype, unsigned long mask)
606 u8 flag = nla_get_u8(tb[attrtype]);
614 /* Process bridge protocol info on port */
615 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
618 unsigned long old_flags = p->flags;
620 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
621 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
622 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
623 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
624 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
625 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
626 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
627 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
629 if (tb[IFLA_BRPORT_COST]) {
630 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
635 if (tb[IFLA_BRPORT_PRIORITY]) {
636 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
641 if (tb[IFLA_BRPORT_STATE]) {
642 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
647 if (tb[IFLA_BRPORT_FLUSH])
648 br_fdb_delete_by_port(p->br, p, 0, 0);
650 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
651 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
652 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
654 err = br_multicast_set_port_router(p, mcast_router);
659 br_port_flags_change(p, old_flags ^ p->flags);
663 /* Change state and parameters on port. */
664 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
666 struct nlattr *protinfo;
667 struct nlattr *afspec;
668 struct net_bridge_port *p;
669 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
672 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
673 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
674 if (!protinfo && !afspec)
677 p = br_port_get_rtnl(dev);
678 /* We want to accept dev as bridge itself if the AF_SPEC
679 * is set to see if someone is setting vlan info on the bridge
685 if (protinfo->nla_type & NLA_F_NESTED) {
686 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
687 protinfo, br_port_policy);
691 spin_lock_bh(&p->br->lock);
692 err = br_setport(p, tb);
693 spin_unlock_bh(&p->br->lock);
695 /* Binary compatibility with old RSTP */
696 if (nla_len(protinfo) < sizeof(u8))
699 spin_lock_bh(&p->br->lock);
700 err = br_set_port_state(p, nla_get_u8(protinfo));
701 spin_unlock_bh(&p->br->lock);
708 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
709 afspec, RTM_SETLINK);
713 br_ifinfo_notify(RTM_NEWLINK, p);
718 /* Delete port information */
719 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
721 struct nlattr *afspec;
722 struct net_bridge_port *p;
725 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
729 p = br_port_get_rtnl(dev);
730 /* We want to accept dev as bridge itself as well */
731 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
734 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
735 afspec, RTM_DELLINK);
737 /* Send RTM_NEWLINK because userspace
738 * expects RTM_NEWLINK for vlan dels
740 br_ifinfo_notify(RTM_NEWLINK, p);
744 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
746 if (tb[IFLA_ADDRESS]) {
747 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
749 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
750 return -EADDRNOTAVAIL;
756 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
757 if (data[IFLA_BR_VLAN_PROTOCOL]) {
758 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
759 case htons(ETH_P_8021Q):
760 case htons(ETH_P_8021AD):
763 return -EPROTONOSUPPORT;
771 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
772 struct nlattr *tb[], struct nlattr *data[])
774 struct net_bridge *br = netdev_priv(dev);
776 if (tb[IFLA_ADDRESS]) {
777 spin_lock_bh(&br->lock);
778 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
779 spin_unlock_bh(&br->lock);
782 return register_netdevice(dev);
785 static int br_port_slave_changelink(struct net_device *brdev,
786 struct net_device *dev,
788 struct nlattr *data[])
790 struct net_bridge *br = netdev_priv(brdev);
796 spin_lock_bh(&br->lock);
797 ret = br_setport(br_port_get_rtnl(dev), data);
798 spin_unlock_bh(&br->lock);
803 static int br_port_fill_slave_info(struct sk_buff *skb,
804 const struct net_device *brdev,
805 const struct net_device *dev)
807 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
810 static size_t br_port_get_slave_size(const struct net_device *brdev,
811 const struct net_device *dev)
813 return br_port_info_size();
816 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
817 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
818 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
819 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
820 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
821 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
822 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
823 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
824 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
825 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
826 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
828 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
829 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
830 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
831 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
832 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
833 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
834 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
835 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
836 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
837 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
838 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
839 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
840 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
841 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
842 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
843 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
844 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
845 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
848 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
849 struct nlattr *data[])
851 struct net_bridge *br = netdev_priv(brdev);
857 if (data[IFLA_BR_FORWARD_DELAY]) {
858 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
863 if (data[IFLA_BR_HELLO_TIME]) {
864 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
869 if (data[IFLA_BR_MAX_AGE]) {
870 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
875 if (data[IFLA_BR_AGEING_TIME]) {
876 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
881 if (data[IFLA_BR_STP_STATE]) {
882 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
884 br_stp_set_enabled(br, stp_enabled);
887 if (data[IFLA_BR_PRIORITY]) {
888 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
890 br_stp_set_bridge_priority(br, priority);
893 if (data[IFLA_BR_VLAN_FILTERING]) {
894 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
896 err = __br_vlan_filter_toggle(br, vlan_filter);
901 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
902 if (data[IFLA_BR_VLAN_PROTOCOL]) {
903 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
905 err = __br_vlan_set_proto(br, vlan_proto);
910 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
911 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
913 err = __br_vlan_set_default_pvid(br, defpvid);
919 if (data[IFLA_BR_GROUP_FWD_MASK]) {
920 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
922 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
924 br->group_fwd_mask = fwd_mask;
927 if (data[IFLA_BR_GROUP_ADDR]) {
928 u8 new_addr[ETH_ALEN];
930 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
932 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
933 if (!is_link_local_ether_addr(new_addr))
935 if (new_addr[5] == 1 || /* 802.3x Pause address */
936 new_addr[5] == 2 || /* 802.3ad Slow protocols */
937 new_addr[5] == 3) /* 802.1X PAE address */
939 spin_lock_bh(&br->lock);
940 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
941 spin_unlock_bh(&br->lock);
942 br->group_addr_set = true;
943 br_recalculate_fwd_mask(br);
946 if (data[IFLA_BR_FDB_FLUSH])
949 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
950 if (data[IFLA_BR_MCAST_ROUTER]) {
951 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
953 err = br_multicast_set_router(br, multicast_router);
958 if (data[IFLA_BR_MCAST_SNOOPING]) {
959 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
961 err = br_multicast_toggle(br, mcast_snooping);
966 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
969 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
970 br->multicast_query_use_ifaddr = !!val;
973 if (data[IFLA_BR_MCAST_QUERIER]) {
974 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
976 err = br_multicast_set_querier(br, mcast_querier);
981 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
982 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
984 br->hash_elasticity = val;
987 if (data[IFLA_BR_MCAST_HASH_MAX]) {
988 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
990 err = br_multicast_set_hash_max(br, hash_max);
995 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
996 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
998 br->multicast_last_member_count = val;
1001 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1002 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1004 br->multicast_startup_query_count = val;
1007 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1008 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1010 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1013 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1014 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1016 br->multicast_membership_interval = clock_t_to_jiffies(val);
1019 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1020 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1022 br->multicast_querier_interval = clock_t_to_jiffies(val);
1025 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1026 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1028 br->multicast_query_interval = clock_t_to_jiffies(val);
1031 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1032 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1034 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1037 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1038 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1040 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1043 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1044 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1045 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1047 br->nf_call_iptables = val ? true : false;
1050 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1051 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1053 br->nf_call_ip6tables = val ? true : false;
1056 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1057 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1059 br->nf_call_arptables = val ? true : false;
1066 static size_t br_get_size(const struct net_device *brdev)
1068 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1069 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1070 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1071 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1072 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1073 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1074 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1075 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1076 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1077 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1079 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1080 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1081 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1082 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1083 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1084 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1085 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1086 nla_total_size(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1087 nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1088 nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1089 nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1090 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1091 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1092 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1093 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1094 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1095 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1096 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1097 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1098 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1099 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1100 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1101 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1102 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1103 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1104 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1105 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1107 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1108 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1109 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1110 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1115 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1117 struct net_bridge *br = netdev_priv(brdev);
1118 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1119 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1120 u32 age_time = jiffies_to_clock_t(br->max_age);
1121 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1122 u32 stp_enabled = br->stp_enabled;
1123 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1124 u8 vlan_enabled = br_vlan_enabled(br);
1127 clockval = br_timer_value(&br->hello_timer);
1128 if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1130 clockval = br_timer_value(&br->tcn_timer);
1131 if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1133 clockval = br_timer_value(&br->topology_change_timer);
1134 if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1136 clockval = br_timer_value(&br->gc_timer);
1137 if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1140 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1141 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1142 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1143 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1144 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1145 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1146 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1147 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1148 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1150 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1151 &br->designated_root) ||
1152 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1153 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1154 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1155 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1156 br->topology_change_detected) ||
1157 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1160 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1161 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1162 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1165 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1166 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1167 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1168 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1169 br->multicast_query_use_ifaddr) ||
1170 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1171 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1172 br->hash_elasticity) ||
1173 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1174 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1175 br->multicast_last_member_count) ||
1176 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1177 br->multicast_startup_query_count))
1180 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1181 if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1183 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1184 if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1186 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1187 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1189 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1190 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1192 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1193 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1195 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1196 if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1199 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1200 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1201 br->nf_call_iptables ? 1 : 0) ||
1202 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1203 br->nf_call_ip6tables ? 1 : 0) ||
1204 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1205 br->nf_call_arptables ? 1 : 0))
1212 static size_t br_get_link_af_size(const struct net_device *dev)
1214 struct net_bridge_port *p;
1215 struct net_bridge *br;
1218 if (br_port_exists(dev)) {
1219 p = br_port_get_rtnl(dev);
1220 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1221 RTEXT_FILTER_BRVLAN);
1222 } else if (dev->priv_flags & IFF_EBRIDGE) {
1223 br = netdev_priv(dev);
1224 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1225 RTEXT_FILTER_BRVLAN);
1228 /* Each VLAN is returned in bridge_vlan_info along with flags */
1229 return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1232 static struct rtnl_af_ops br_af_ops __read_mostly = {
1233 .family = AF_BRIDGE,
1234 .get_link_af_size = br_get_link_af_size,
1237 struct rtnl_link_ops br_link_ops __read_mostly = {
1239 .priv_size = sizeof(struct net_bridge),
1240 .setup = br_dev_setup,
1241 .maxtype = IFLA_BR_MAX,
1242 .policy = br_policy,
1243 .validate = br_validate,
1244 .newlink = br_dev_newlink,
1245 .changelink = br_changelink,
1246 .dellink = br_dev_delete,
1247 .get_size = br_get_size,
1248 .fill_info = br_fill_info,
1250 .slave_maxtype = IFLA_BRPORT_MAX,
1251 .slave_policy = br_port_policy,
1252 .slave_changelink = br_port_slave_changelink,
1253 .get_slave_size = br_port_get_slave_size,
1254 .fill_slave_info = br_port_fill_slave_info,
1257 int __init br_netlink_init(void)
1262 rtnl_af_register(&br_af_ops);
1264 err = rtnl_link_register(&br_link_ops);
1271 rtnl_af_unregister(&br_af_ops);
1276 void br_netlink_fini(void)
1279 rtnl_af_unregister(&br_af_ops);
1280 rtnl_link_unregister(&br_link_ops);