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 */
141 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
143 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
144 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
145 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
146 + nla_total_size(4) /* IFLA_MASTER */
147 + nla_total_size(4) /* IFLA_MTU */
148 + nla_total_size(4) /* IFLA_LINK */
149 + nla_total_size(1) /* IFLA_OPERSTATE */
150 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
151 + nla_total_size(br_get_link_af_size_filtered(dev,
152 filter_mask)); /* IFLA_AF_SPEC */
155 static int br_port_fill_attrs(struct sk_buff *skb,
156 const struct net_bridge_port *p)
158 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
160 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
161 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
162 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
163 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
164 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
165 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
166 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
167 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
168 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
169 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
170 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
171 !!(p->flags & BR_PROXYARP_WIFI)) ||
172 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
173 &p->designated_root) ||
174 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
175 &p->designated_bridge) ||
176 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
177 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
178 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
179 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
180 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
181 p->topology_change_ack) ||
182 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
188 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
189 u16 vid_end, u16 flags)
191 struct bridge_vlan_info vinfo;
193 if ((vid_end - vid_start) > 0) {
194 /* add range to skb */
195 vinfo.vid = vid_start;
196 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
197 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
198 sizeof(vinfo), &vinfo))
199 goto nla_put_failure;
202 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
203 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
204 sizeof(vinfo), &vinfo))
205 goto nla_put_failure;
207 vinfo.vid = vid_start;
209 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
210 sizeof(vinfo), &vinfo))
211 goto nla_put_failure;
220 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
221 struct net_bridge_vlan_group *vg)
223 struct net_bridge_vlan *v;
224 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
228 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
229 * and mark vlan info with begin and end flags
230 * if vlaninfo represents a range
232 pvid = br_get_pvid(vg);
233 list_for_each_entry(v, &vg->vlan_list, vlist) {
235 if (!br_vlan_should_use(v))
238 flags |= BRIDGE_VLAN_INFO_PVID;
240 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
241 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
243 if (vid_range_start == 0) {
245 } else if ((v->vid - vid_range_end) == 1 &&
246 flags == vid_range_flags) {
247 vid_range_end = v->vid;
250 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
258 vid_range_start = v->vid;
259 vid_range_end = v->vid;
260 vid_range_flags = flags;
263 if (vid_range_start != 0) {
264 /* Call it once more to send any left over vlans */
265 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
275 static int br_fill_ifvlaninfo(struct sk_buff *skb,
276 struct net_bridge_vlan_group *vg)
278 struct bridge_vlan_info vinfo;
279 struct net_bridge_vlan *v;
282 pvid = br_get_pvid(vg);
283 list_for_each_entry(v, &vg->vlan_list, vlist) {
284 if (!br_vlan_should_use(v))
290 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
292 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
293 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
295 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
296 sizeof(vinfo), &vinfo))
297 goto nla_put_failure;
307 * Create one netlink message for one interface
308 * Contains port and master info as well as carrier and bridge state.
310 static int br_fill_ifinfo(struct sk_buff *skb,
311 struct net_bridge_port *port,
312 u32 pid, u32 seq, int event, unsigned int flags,
313 u32 filter_mask, const struct net_device *dev)
315 struct net_bridge *br;
316 struct ifinfomsg *hdr;
317 struct nlmsghdr *nlh;
318 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
323 br = netdev_priv(dev);
325 br_debug(br, "br_fill_info event %d port %s master %s\n",
326 event, dev->name, br->dev->name);
328 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
332 hdr = nlmsg_data(nlh);
333 hdr->ifi_family = AF_BRIDGE;
335 hdr->ifi_type = dev->type;
336 hdr->ifi_index = dev->ifindex;
337 hdr->ifi_flags = dev_get_flags(dev);
340 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
341 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
342 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
343 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
345 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
346 (dev->ifindex != dev_get_iflink(dev) &&
347 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
348 goto nla_put_failure;
350 if (event == RTM_NEWLINK && port) {
352 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
354 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
355 goto nla_put_failure;
356 nla_nest_end(skb, nest);
359 /* Check if the VID information is requested */
360 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
361 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
362 struct net_bridge_vlan_group *vg;
367 vg = nbp_vlan_group(port);
369 vg = br_vlan_group(br);
371 if (!vg || !vg->num_vlans)
374 af = nla_nest_start(skb, IFLA_AF_SPEC);
376 goto nla_put_failure;
378 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
379 err = br_fill_ifvlaninfo_compressed(skb, vg);
381 err = br_fill_ifvlaninfo(skb, vg);
383 goto nla_put_failure;
384 nla_nest_end(skb, af);
392 nlmsg_cancel(skb, nlh);
397 * Notify listeners of a change in port information
399 void br_ifinfo_notify(int event, struct net_bridge_port *port)
404 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
409 net = dev_net(port->dev);
410 br_debug(port->br, "port %u(%s) event %d\n",
411 (unsigned int)port->port_no, port->dev->name, event);
413 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
417 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
419 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
420 WARN_ON(err == -EMSGSIZE);
424 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
427 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
432 * Dump information about all ports, in response to GETLINK
434 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
435 struct net_device *dev, u32 filter_mask, int nlflags)
437 struct net_bridge_port *port = br_port_get_rtnl(dev);
439 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
440 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
443 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
447 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
448 int cmd, struct bridge_vlan_info *vinfo)
455 /* if the MASTER flag is set this will act on the global
456 * per-VLAN entry as well
458 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
462 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
463 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
469 nbp_vlan_delete(p, vinfo->vid);
470 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
471 br_vlan_delete(p->br, vinfo->vid);
473 br_vlan_delete(br, vinfo->vid);
481 static int br_afspec(struct net_bridge *br,
482 struct net_bridge_port *p,
483 struct nlattr *af_spec,
486 struct bridge_vlan_info *vinfo_start = NULL;
487 struct bridge_vlan_info *vinfo = NULL;
492 nla_for_each_nested(attr, af_spec, rem) {
493 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
495 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
497 vinfo = nla_data(attr);
498 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
500 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
508 struct bridge_vlan_info tmp_vinfo;
511 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
514 if (vinfo->vid <= vinfo_start->vid)
517 memcpy(&tmp_vinfo, vinfo_start,
518 sizeof(struct bridge_vlan_info));
520 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
522 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
528 err = br_vlan_info(br, p, cmd, vinfo);
537 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
538 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
539 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
540 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
541 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
542 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
543 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
544 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
545 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
546 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
547 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
548 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
551 /* Change the state of the port and notify spanning tree */
552 static int br_set_port_state(struct net_bridge_port *p, u8 state)
554 if (state > BR_STATE_BLOCKING)
557 /* if kernel STP is running, don't allow changes */
558 if (p->br->stp_enabled == BR_KERNEL_STP)
561 /* if device is not up, change is not allowed
562 * if link is not present, only allowable state is disabled
564 if (!netif_running(p->dev) ||
565 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
568 br_set_state(p, state);
570 br_port_state_selection(p->br);
574 /* Set/clear or port flags based on attribute */
575 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
576 int attrtype, unsigned long mask)
579 u8 flag = nla_get_u8(tb[attrtype]);
587 /* Process bridge protocol info on port */
588 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
591 unsigned long old_flags = p->flags;
593 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
594 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
595 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
596 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
597 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
598 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
599 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
600 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
602 if (tb[IFLA_BRPORT_COST]) {
603 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
608 if (tb[IFLA_BRPORT_PRIORITY]) {
609 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
614 if (tb[IFLA_BRPORT_STATE]) {
615 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
620 br_port_flags_change(p, old_flags ^ p->flags);
624 /* Change state and parameters on port. */
625 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
627 struct nlattr *protinfo;
628 struct nlattr *afspec;
629 struct net_bridge_port *p;
630 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
633 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
634 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
635 if (!protinfo && !afspec)
638 p = br_port_get_rtnl(dev);
639 /* We want to accept dev as bridge itself if the AF_SPEC
640 * is set to see if someone is setting vlan info on the bridge
646 if (protinfo->nla_type & NLA_F_NESTED) {
647 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
648 protinfo, br_port_policy);
652 spin_lock_bh(&p->br->lock);
653 err = br_setport(p, tb);
654 spin_unlock_bh(&p->br->lock);
656 /* Binary compatibility with old RSTP */
657 if (nla_len(protinfo) < sizeof(u8))
660 spin_lock_bh(&p->br->lock);
661 err = br_set_port_state(p, nla_get_u8(protinfo));
662 spin_unlock_bh(&p->br->lock);
669 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
670 afspec, RTM_SETLINK);
674 br_ifinfo_notify(RTM_NEWLINK, p);
679 /* Delete port information */
680 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
682 struct nlattr *afspec;
683 struct net_bridge_port *p;
686 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
690 p = br_port_get_rtnl(dev);
691 /* We want to accept dev as bridge itself as well */
692 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
695 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
696 afspec, RTM_DELLINK);
698 /* Send RTM_NEWLINK because userspace
699 * expects RTM_NEWLINK for vlan dels
701 br_ifinfo_notify(RTM_NEWLINK, p);
705 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
707 if (tb[IFLA_ADDRESS]) {
708 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
710 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
711 return -EADDRNOTAVAIL;
717 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
718 if (data[IFLA_BR_VLAN_PROTOCOL]) {
719 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
720 case htons(ETH_P_8021Q):
721 case htons(ETH_P_8021AD):
724 return -EPROTONOSUPPORT;
732 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
733 struct nlattr *tb[], struct nlattr *data[])
735 struct net_bridge *br = netdev_priv(dev);
737 if (tb[IFLA_ADDRESS]) {
738 spin_lock_bh(&br->lock);
739 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
740 spin_unlock_bh(&br->lock);
743 return register_netdevice(dev);
746 static int br_port_slave_changelink(struct net_device *brdev,
747 struct net_device *dev,
749 struct nlattr *data[])
751 struct net_bridge *br = netdev_priv(brdev);
757 spin_lock_bh(&br->lock);
758 ret = br_setport(br_port_get_rtnl(dev), data);
759 spin_unlock_bh(&br->lock);
764 static int br_port_fill_slave_info(struct sk_buff *skb,
765 const struct net_device *brdev,
766 const struct net_device *dev)
768 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
771 static size_t br_port_get_slave_size(const struct net_device *brdev,
772 const struct net_device *dev)
774 return br_port_info_size();
777 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
778 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
779 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
780 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
781 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
782 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
783 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
784 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
785 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
786 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
787 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
789 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
790 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
791 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
792 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
793 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
794 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
795 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
796 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
797 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
798 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
799 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
800 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
801 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
802 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
803 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
804 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
805 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
806 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
809 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
810 struct nlattr *data[])
812 struct net_bridge *br = netdev_priv(brdev);
818 if (data[IFLA_BR_FORWARD_DELAY]) {
819 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
824 if (data[IFLA_BR_HELLO_TIME]) {
825 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
830 if (data[IFLA_BR_MAX_AGE]) {
831 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
836 if (data[IFLA_BR_AGEING_TIME]) {
837 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
839 br->ageing_time = clock_t_to_jiffies(ageing_time);
842 if (data[IFLA_BR_STP_STATE]) {
843 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
845 br_stp_set_enabled(br, stp_enabled);
848 if (data[IFLA_BR_PRIORITY]) {
849 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
851 br_stp_set_bridge_priority(br, priority);
854 if (data[IFLA_BR_VLAN_FILTERING]) {
855 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
857 err = __br_vlan_filter_toggle(br, vlan_filter);
862 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
863 if (data[IFLA_BR_VLAN_PROTOCOL]) {
864 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
866 err = __br_vlan_set_proto(br, vlan_proto);
871 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
872 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
874 err = __br_vlan_set_default_pvid(br, defpvid);
880 if (data[IFLA_BR_GROUP_FWD_MASK]) {
881 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
883 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
885 br->group_fwd_mask = fwd_mask;
888 if (data[IFLA_BR_GROUP_ADDR]) {
889 u8 new_addr[ETH_ALEN];
891 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
893 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
894 if (!is_link_local_ether_addr(new_addr))
896 if (new_addr[5] == 1 || /* 802.3x Pause address */
897 new_addr[5] == 2 || /* 802.3ad Slow protocols */
898 new_addr[5] == 3) /* 802.1X PAE address */
900 spin_lock_bh(&br->lock);
901 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
902 spin_unlock_bh(&br->lock);
903 br->group_addr_set = true;
904 br_recalculate_fwd_mask(br);
907 if (data[IFLA_BR_FDB_FLUSH])
910 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
911 if (data[IFLA_BR_MCAST_ROUTER]) {
912 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
914 err = br_multicast_set_router(br, multicast_router);
919 if (data[IFLA_BR_MCAST_SNOOPING]) {
920 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
922 err = br_multicast_toggle(br, mcast_snooping);
927 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
930 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
931 br->multicast_query_use_ifaddr = !!val;
934 if (data[IFLA_BR_MCAST_QUERIER]) {
935 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
937 err = br_multicast_set_querier(br, mcast_querier);
942 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
943 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
945 br->hash_elasticity = val;
948 if (data[IFLA_BR_MCAST_HASH_MAX]) {
949 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
951 err = br_multicast_set_hash_max(br, hash_max);
956 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
957 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
959 br->multicast_last_member_count = val;
962 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
963 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
965 br->multicast_startup_query_count = val;
968 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
969 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
971 br->multicast_last_member_interval = clock_t_to_jiffies(val);
974 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
975 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
977 br->multicast_membership_interval = clock_t_to_jiffies(val);
980 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
981 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
983 br->multicast_querier_interval = clock_t_to_jiffies(val);
986 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
987 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
989 br->multicast_query_interval = clock_t_to_jiffies(val);
992 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
993 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
995 br->multicast_query_response_interval = clock_t_to_jiffies(val);
998 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
999 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1001 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1004 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1005 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1006 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1008 br->nf_call_iptables = val ? true : false;
1011 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1012 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1014 br->nf_call_ip6tables = val ? true : false;
1017 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1018 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1020 br->nf_call_arptables = val ? true : false;
1027 static size_t br_get_size(const struct net_device *brdev)
1029 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1030 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1031 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1032 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1033 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1034 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1035 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1036 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1037 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1038 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1040 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1041 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1042 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1043 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1044 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1045 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1046 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1047 nla_total_size(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1048 nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1049 nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1050 nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1051 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1052 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1053 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1054 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1055 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1056 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1057 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1058 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1059 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1060 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1061 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1062 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1063 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1064 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1065 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1066 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1068 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1069 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1070 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1071 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1076 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1078 struct net_bridge *br = netdev_priv(brdev);
1079 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1080 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1081 u32 age_time = jiffies_to_clock_t(br->max_age);
1082 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1083 u32 stp_enabled = br->stp_enabled;
1084 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1085 u8 vlan_enabled = br_vlan_enabled(br);
1088 clockval = br_timer_value(&br->hello_timer);
1089 if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1091 clockval = br_timer_value(&br->tcn_timer);
1092 if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1094 clockval = br_timer_value(&br->topology_change_timer);
1095 if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1097 clockval = br_timer_value(&br->gc_timer);
1098 if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1101 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1102 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1103 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1104 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1105 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1106 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1107 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1108 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1109 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1111 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1112 &br->designated_root) ||
1113 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1114 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1115 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1116 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1117 br->topology_change_detected) ||
1118 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1121 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1122 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1123 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1126 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1127 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1128 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1129 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1130 br->multicast_query_use_ifaddr) ||
1131 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1132 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1133 br->hash_elasticity) ||
1134 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1135 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1136 br->multicast_last_member_count) ||
1137 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1138 br->multicast_startup_query_count))
1141 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1142 if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1144 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1145 if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1147 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1148 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1150 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1151 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1153 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1154 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1156 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1157 if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1160 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1161 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1162 br->nf_call_iptables ? 1 : 0) ||
1163 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1164 br->nf_call_ip6tables ? 1 : 0) ||
1165 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1166 br->nf_call_arptables ? 1 : 0))
1173 static size_t br_get_link_af_size(const struct net_device *dev)
1175 struct net_bridge_port *p;
1176 struct net_bridge *br;
1179 if (br_port_exists(dev)) {
1180 p = br_port_get_rtnl(dev);
1181 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1182 RTEXT_FILTER_BRVLAN);
1183 } else if (dev->priv_flags & IFF_EBRIDGE) {
1184 br = netdev_priv(dev);
1185 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1186 RTEXT_FILTER_BRVLAN);
1189 /* Each VLAN is returned in bridge_vlan_info along with flags */
1190 return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1193 static struct rtnl_af_ops br_af_ops __read_mostly = {
1194 .family = AF_BRIDGE,
1195 .get_link_af_size = br_get_link_af_size,
1198 struct rtnl_link_ops br_link_ops __read_mostly = {
1200 .priv_size = sizeof(struct net_bridge),
1201 .setup = br_dev_setup,
1202 .maxtype = IFLA_BR_MAX,
1203 .policy = br_policy,
1204 .validate = br_validate,
1205 .newlink = br_dev_newlink,
1206 .changelink = br_changelink,
1207 .dellink = br_dev_delete,
1208 .get_size = br_get_size,
1209 .fill_info = br_fill_info,
1211 .slave_maxtype = IFLA_BRPORT_MAX,
1212 .slave_policy = br_port_policy,
1213 .slave_changelink = br_port_slave_changelink,
1214 .get_slave_size = br_port_get_slave_size,
1215 .fill_slave_info = br_port_fill_slave_info,
1218 int __init br_netlink_init(void)
1223 rtnl_af_register(&br_af_ops);
1225 err = rtnl_link_register(&br_link_ops);
1232 rtnl_af_unregister(&br_af_ops);
1237 void br_netlink_fini(void)
1240 rtnl_af_unregister(&br_af_ops);
1241 rtnl_link_unregister(&br_link_ops);