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 */
144 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
146 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
147 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
148 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
149 + nla_total_size(4) /* IFLA_MASTER */
150 + nla_total_size(4) /* IFLA_MTU */
151 + nla_total_size(4) /* IFLA_LINK */
152 + nla_total_size(1) /* IFLA_OPERSTATE */
153 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
154 + nla_total_size(br_get_link_af_size_filtered(dev,
155 filter_mask)); /* IFLA_AF_SPEC */
158 static int br_port_fill_attrs(struct sk_buff *skb,
159 const struct net_bridge_port *p)
161 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
164 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
165 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
166 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
167 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
168 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
169 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
170 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
171 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
172 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
173 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
174 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
175 !!(p->flags & BR_PROXYARP_WIFI)) ||
176 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
177 &p->designated_root) ||
178 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
179 &p->designated_bridge) ||
180 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
181 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
182 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
183 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
184 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
185 p->topology_change_ack) ||
186 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
189 timerval = br_timer_value(&p->message_age_timer);
190 if (nla_put_u64(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval))
192 timerval = br_timer_value(&p->forward_delay_timer);
193 if (nla_put_u64(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval))
195 timerval = br_timer_value(&p->hold_timer);
196 if (nla_put_u64(skb, IFLA_BRPORT_HOLD_TIMER, timerval))
202 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
203 u16 vid_end, u16 flags)
205 struct bridge_vlan_info vinfo;
207 if ((vid_end - vid_start) > 0) {
208 /* add range to skb */
209 vinfo.vid = vid_start;
210 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
211 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
212 sizeof(vinfo), &vinfo))
213 goto nla_put_failure;
216 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
217 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
218 sizeof(vinfo), &vinfo))
219 goto nla_put_failure;
221 vinfo.vid = vid_start;
223 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
224 sizeof(vinfo), &vinfo))
225 goto nla_put_failure;
234 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
235 struct net_bridge_vlan_group *vg)
237 struct net_bridge_vlan *v;
238 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
242 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
243 * and mark vlan info with begin and end flags
244 * if vlaninfo represents a range
246 pvid = br_get_pvid(vg);
247 list_for_each_entry(v, &vg->vlan_list, vlist) {
249 if (!br_vlan_should_use(v))
252 flags |= BRIDGE_VLAN_INFO_PVID;
254 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
255 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
257 if (vid_range_start == 0) {
259 } else if ((v->vid - vid_range_end) == 1 &&
260 flags == vid_range_flags) {
261 vid_range_end = v->vid;
264 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
272 vid_range_start = v->vid;
273 vid_range_end = v->vid;
274 vid_range_flags = flags;
277 if (vid_range_start != 0) {
278 /* Call it once more to send any left over vlans */
279 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
289 static int br_fill_ifvlaninfo(struct sk_buff *skb,
290 struct net_bridge_vlan_group *vg)
292 struct bridge_vlan_info vinfo;
293 struct net_bridge_vlan *v;
296 pvid = br_get_pvid(vg);
297 list_for_each_entry(v, &vg->vlan_list, vlist) {
298 if (!br_vlan_should_use(v))
304 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
306 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
307 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
309 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
310 sizeof(vinfo), &vinfo))
311 goto nla_put_failure;
321 * Create one netlink message for one interface
322 * Contains port and master info as well as carrier and bridge state.
324 static int br_fill_ifinfo(struct sk_buff *skb,
325 struct net_bridge_port *port,
326 u32 pid, u32 seq, int event, unsigned int flags,
327 u32 filter_mask, const struct net_device *dev)
329 struct net_bridge *br;
330 struct ifinfomsg *hdr;
331 struct nlmsghdr *nlh;
332 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
337 br = netdev_priv(dev);
339 br_debug(br, "br_fill_info event %d port %s master %s\n",
340 event, dev->name, br->dev->name);
342 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
346 hdr = nlmsg_data(nlh);
347 hdr->ifi_family = AF_BRIDGE;
349 hdr->ifi_type = dev->type;
350 hdr->ifi_index = dev->ifindex;
351 hdr->ifi_flags = dev_get_flags(dev);
354 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
355 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
356 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
357 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
359 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
360 (dev->ifindex != dev_get_iflink(dev) &&
361 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
362 goto nla_put_failure;
364 if (event == RTM_NEWLINK && port) {
366 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
368 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
369 goto nla_put_failure;
370 nla_nest_end(skb, nest);
373 /* Check if the VID information is requested */
374 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
375 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
376 struct net_bridge_vlan_group *vg;
381 vg = nbp_vlan_group(port);
383 vg = br_vlan_group(br);
385 if (!vg || !vg->num_vlans)
388 af = nla_nest_start(skb, IFLA_AF_SPEC);
390 goto nla_put_failure;
392 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
393 err = br_fill_ifvlaninfo_compressed(skb, vg);
395 err = br_fill_ifvlaninfo(skb, vg);
397 goto nla_put_failure;
398 nla_nest_end(skb, af);
406 nlmsg_cancel(skb, nlh);
411 * Notify listeners of a change in port information
413 void br_ifinfo_notify(int event, struct net_bridge_port *port)
418 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
423 net = dev_net(port->dev);
424 br_debug(port->br, "port %u(%s) event %d\n",
425 (unsigned int)port->port_no, port->dev->name, event);
427 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
431 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
433 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
434 WARN_ON(err == -EMSGSIZE);
438 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
441 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
446 * Dump information about all ports, in response to GETLINK
448 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
449 struct net_device *dev, u32 filter_mask, int nlflags)
451 struct net_bridge_port *port = br_port_get_rtnl(dev);
453 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
454 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
457 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
461 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
462 int cmd, struct bridge_vlan_info *vinfo)
469 /* if the MASTER flag is set this will act on the global
470 * per-VLAN entry as well
472 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
476 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
477 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
483 nbp_vlan_delete(p, vinfo->vid);
484 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
485 br_vlan_delete(p->br, vinfo->vid);
487 br_vlan_delete(br, vinfo->vid);
495 static int br_afspec(struct net_bridge *br,
496 struct net_bridge_port *p,
497 struct nlattr *af_spec,
500 struct bridge_vlan_info *vinfo_start = NULL;
501 struct bridge_vlan_info *vinfo = NULL;
506 nla_for_each_nested(attr, af_spec, rem) {
507 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
509 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
511 vinfo = nla_data(attr);
512 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
514 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
522 struct bridge_vlan_info tmp_vinfo;
525 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
528 if (vinfo->vid <= vinfo_start->vid)
531 memcpy(&tmp_vinfo, vinfo_start,
532 sizeof(struct bridge_vlan_info));
534 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
536 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
542 err = br_vlan_info(br, p, cmd, vinfo);
551 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
552 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
553 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
554 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
555 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
556 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
557 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
558 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
559 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
560 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
561 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
562 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
565 /* Change the state of the port and notify spanning tree */
566 static int br_set_port_state(struct net_bridge_port *p, u8 state)
568 if (state > BR_STATE_BLOCKING)
571 /* if kernel STP is running, don't allow changes */
572 if (p->br->stp_enabled == BR_KERNEL_STP)
575 /* if device is not up, change is not allowed
576 * if link is not present, only allowable state is disabled
578 if (!netif_running(p->dev) ||
579 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
582 br_set_state(p, state);
584 br_port_state_selection(p->br);
588 /* Set/clear or port flags based on attribute */
589 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
590 int attrtype, unsigned long mask)
593 u8 flag = nla_get_u8(tb[attrtype]);
601 /* Process bridge protocol info on port */
602 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
605 unsigned long old_flags = p->flags;
607 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
608 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
609 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
610 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
611 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
612 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
613 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
614 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
616 if (tb[IFLA_BRPORT_COST]) {
617 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
622 if (tb[IFLA_BRPORT_PRIORITY]) {
623 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
628 if (tb[IFLA_BRPORT_STATE]) {
629 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
634 br_port_flags_change(p, old_flags ^ p->flags);
638 /* Change state and parameters on port. */
639 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
641 struct nlattr *protinfo;
642 struct nlattr *afspec;
643 struct net_bridge_port *p;
644 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
647 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
648 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
649 if (!protinfo && !afspec)
652 p = br_port_get_rtnl(dev);
653 /* We want to accept dev as bridge itself if the AF_SPEC
654 * is set to see if someone is setting vlan info on the bridge
660 if (protinfo->nla_type & NLA_F_NESTED) {
661 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
662 protinfo, br_port_policy);
666 spin_lock_bh(&p->br->lock);
667 err = br_setport(p, tb);
668 spin_unlock_bh(&p->br->lock);
670 /* Binary compatibility with old RSTP */
671 if (nla_len(protinfo) < sizeof(u8))
674 spin_lock_bh(&p->br->lock);
675 err = br_set_port_state(p, nla_get_u8(protinfo));
676 spin_unlock_bh(&p->br->lock);
683 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
684 afspec, RTM_SETLINK);
688 br_ifinfo_notify(RTM_NEWLINK, p);
693 /* Delete port information */
694 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
696 struct nlattr *afspec;
697 struct net_bridge_port *p;
700 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
704 p = br_port_get_rtnl(dev);
705 /* We want to accept dev as bridge itself as well */
706 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
709 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
710 afspec, RTM_DELLINK);
712 /* Send RTM_NEWLINK because userspace
713 * expects RTM_NEWLINK for vlan dels
715 br_ifinfo_notify(RTM_NEWLINK, p);
719 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
721 if (tb[IFLA_ADDRESS]) {
722 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
724 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
725 return -EADDRNOTAVAIL;
731 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
732 if (data[IFLA_BR_VLAN_PROTOCOL]) {
733 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
734 case htons(ETH_P_8021Q):
735 case htons(ETH_P_8021AD):
738 return -EPROTONOSUPPORT;
746 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
747 struct nlattr *tb[], struct nlattr *data[])
749 struct net_bridge *br = netdev_priv(dev);
751 if (tb[IFLA_ADDRESS]) {
752 spin_lock_bh(&br->lock);
753 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
754 spin_unlock_bh(&br->lock);
757 return register_netdevice(dev);
760 static int br_port_slave_changelink(struct net_device *brdev,
761 struct net_device *dev,
763 struct nlattr *data[])
765 struct net_bridge *br = netdev_priv(brdev);
771 spin_lock_bh(&br->lock);
772 ret = br_setport(br_port_get_rtnl(dev), data);
773 spin_unlock_bh(&br->lock);
778 static int br_port_fill_slave_info(struct sk_buff *skb,
779 const struct net_device *brdev,
780 const struct net_device *dev)
782 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
785 static size_t br_port_get_slave_size(const struct net_device *brdev,
786 const struct net_device *dev)
788 return br_port_info_size();
791 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
792 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
793 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
794 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
795 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
796 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
797 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
798 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
799 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
800 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
801 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
803 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
804 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
805 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
806 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
807 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
808 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
809 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
810 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
811 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
812 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
813 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
814 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
815 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
816 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
817 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
818 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
819 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
820 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
823 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
824 struct nlattr *data[])
826 struct net_bridge *br = netdev_priv(brdev);
832 if (data[IFLA_BR_FORWARD_DELAY]) {
833 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
838 if (data[IFLA_BR_HELLO_TIME]) {
839 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
844 if (data[IFLA_BR_MAX_AGE]) {
845 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
850 if (data[IFLA_BR_AGEING_TIME]) {
851 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
853 br->ageing_time = clock_t_to_jiffies(ageing_time);
856 if (data[IFLA_BR_STP_STATE]) {
857 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
859 br_stp_set_enabled(br, stp_enabled);
862 if (data[IFLA_BR_PRIORITY]) {
863 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
865 br_stp_set_bridge_priority(br, priority);
868 if (data[IFLA_BR_VLAN_FILTERING]) {
869 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
871 err = __br_vlan_filter_toggle(br, vlan_filter);
876 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
877 if (data[IFLA_BR_VLAN_PROTOCOL]) {
878 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
880 err = __br_vlan_set_proto(br, vlan_proto);
885 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
886 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
888 err = __br_vlan_set_default_pvid(br, defpvid);
894 if (data[IFLA_BR_GROUP_FWD_MASK]) {
895 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
897 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
899 br->group_fwd_mask = fwd_mask;
902 if (data[IFLA_BR_GROUP_ADDR]) {
903 u8 new_addr[ETH_ALEN];
905 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
907 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
908 if (!is_link_local_ether_addr(new_addr))
910 if (new_addr[5] == 1 || /* 802.3x Pause address */
911 new_addr[5] == 2 || /* 802.3ad Slow protocols */
912 new_addr[5] == 3) /* 802.1X PAE address */
914 spin_lock_bh(&br->lock);
915 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
916 spin_unlock_bh(&br->lock);
917 br->group_addr_set = true;
918 br_recalculate_fwd_mask(br);
921 if (data[IFLA_BR_FDB_FLUSH])
924 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
925 if (data[IFLA_BR_MCAST_ROUTER]) {
926 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
928 err = br_multicast_set_router(br, multicast_router);
933 if (data[IFLA_BR_MCAST_SNOOPING]) {
934 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
936 err = br_multicast_toggle(br, mcast_snooping);
941 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
944 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
945 br->multicast_query_use_ifaddr = !!val;
948 if (data[IFLA_BR_MCAST_QUERIER]) {
949 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
951 err = br_multicast_set_querier(br, mcast_querier);
956 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
957 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
959 br->hash_elasticity = val;
962 if (data[IFLA_BR_MCAST_HASH_MAX]) {
963 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
965 err = br_multicast_set_hash_max(br, hash_max);
970 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
971 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
973 br->multicast_last_member_count = val;
976 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
977 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
979 br->multicast_startup_query_count = val;
982 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
983 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
985 br->multicast_last_member_interval = clock_t_to_jiffies(val);
988 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
989 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
991 br->multicast_membership_interval = clock_t_to_jiffies(val);
994 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
995 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
997 br->multicast_querier_interval = clock_t_to_jiffies(val);
1000 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1001 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1003 br->multicast_query_interval = clock_t_to_jiffies(val);
1006 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1007 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1009 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1012 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1013 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1015 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1018 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1019 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1020 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1022 br->nf_call_iptables = val ? true : false;
1025 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1026 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1028 br->nf_call_ip6tables = val ? true : false;
1031 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1032 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1034 br->nf_call_arptables = val ? true : false;
1041 static size_t br_get_size(const struct net_device *brdev)
1043 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1044 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1045 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1046 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1047 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1048 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1049 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1050 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1051 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1052 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1054 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1055 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1056 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1057 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1058 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1059 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1060 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1061 nla_total_size(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1062 nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1063 nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1064 nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1065 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1066 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1067 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1068 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1069 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1070 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1071 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1072 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1073 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1074 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1075 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1076 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1077 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1078 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1079 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1080 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1082 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1083 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1084 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1085 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1090 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1092 struct net_bridge *br = netdev_priv(brdev);
1093 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1094 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1095 u32 age_time = jiffies_to_clock_t(br->max_age);
1096 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1097 u32 stp_enabled = br->stp_enabled;
1098 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1099 u8 vlan_enabled = br_vlan_enabled(br);
1102 clockval = br_timer_value(&br->hello_timer);
1103 if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1105 clockval = br_timer_value(&br->tcn_timer);
1106 if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1108 clockval = br_timer_value(&br->topology_change_timer);
1109 if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1111 clockval = br_timer_value(&br->gc_timer);
1112 if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1115 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1116 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1117 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1118 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1119 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1120 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1121 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1122 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1123 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1125 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1126 &br->designated_root) ||
1127 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1128 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1129 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1130 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1131 br->topology_change_detected) ||
1132 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1135 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1136 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1137 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1140 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1141 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1142 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1143 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1144 br->multicast_query_use_ifaddr) ||
1145 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1146 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1147 br->hash_elasticity) ||
1148 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1149 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1150 br->multicast_last_member_count) ||
1151 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1152 br->multicast_startup_query_count))
1155 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1156 if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1158 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1159 if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1161 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1162 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1164 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1165 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1167 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1168 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1170 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1171 if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1174 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1175 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1176 br->nf_call_iptables ? 1 : 0) ||
1177 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1178 br->nf_call_ip6tables ? 1 : 0) ||
1179 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1180 br->nf_call_arptables ? 1 : 0))
1187 static size_t br_get_link_af_size(const struct net_device *dev)
1189 struct net_bridge_port *p;
1190 struct net_bridge *br;
1193 if (br_port_exists(dev)) {
1194 p = br_port_get_rtnl(dev);
1195 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1196 RTEXT_FILTER_BRVLAN);
1197 } else if (dev->priv_flags & IFF_EBRIDGE) {
1198 br = netdev_priv(dev);
1199 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1200 RTEXT_FILTER_BRVLAN);
1203 /* Each VLAN is returned in bridge_vlan_info along with flags */
1204 return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1207 static struct rtnl_af_ops br_af_ops __read_mostly = {
1208 .family = AF_BRIDGE,
1209 .get_link_af_size = br_get_link_af_size,
1212 struct rtnl_link_ops br_link_ops __read_mostly = {
1214 .priv_size = sizeof(struct net_bridge),
1215 .setup = br_dev_setup,
1216 .maxtype = IFLA_BR_MAX,
1217 .policy = br_policy,
1218 .validate = br_validate,
1219 .newlink = br_dev_newlink,
1220 .changelink = br_changelink,
1221 .dellink = br_dev_delete,
1222 .get_size = br_get_size,
1223 .fill_info = br_fill_info,
1225 .slave_maxtype = IFLA_BRPORT_MAX,
1226 .slave_policy = br_port_policy,
1227 .slave_changelink = br_port_slave_changelink,
1228 .get_slave_size = br_port_get_slave_size,
1229 .fill_slave_info = br_port_fill_slave_info,
1232 int __init br_netlink_init(void)
1237 rtnl_af_register(&br_af_ops);
1239 err = rtnl_link_register(&br_link_ops);
1246 rtnl_af_unregister(&br_af_ops);
1251 void br_netlink_fini(void)
1254 rtnl_af_unregister(&br_af_ops);
1255 rtnl_link_unregister(&br_link_ops);