1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/igmp.h>
4 #include <linux/kernel.h>
5 #include <linux/netdevice.h>
6 #include <linux/rculist.h>
7 #include <linux/skbuff.h>
8 #include <linux/if_ether.h>
10 #include <net/netlink.h>
11 #include <net/switchdev.h>
12 #if IS_ENABLED(CONFIG_IPV6)
14 #include <net/addrconf.h>
17 #include "br_private.h"
20 br_ip4_rports_get_timer(struct net_bridge_mcast_port *pmctx,
23 *timer = br_timer_value(&pmctx->ip4_mc_router_timer);
24 return !hlist_unhashed(&pmctx->ip4_rlist);
28 br_ip6_rports_get_timer(struct net_bridge_mcast_port *pmctx,
31 #if IS_ENABLED(CONFIG_IPV6)
32 *timer = br_timer_value(&pmctx->ip6_mc_router_timer);
33 return !hlist_unhashed(&pmctx->ip6_rlist);
40 static size_t __br_rports_one_size(void)
42 return nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PORT */
43 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_TIMER */
44 nla_total_size(sizeof(u8)) + /* MDBA_ROUTER_PATTR_TYPE */
45 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET_TIMER */
46 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET6_TIMER */
47 nla_total_size(sizeof(u32)); /* MDBA_ROUTER_PATTR_VID */
50 size_t br_rports_size(const struct net_bridge_mcast *brmctx)
52 struct net_bridge_mcast_port *pmctx;
53 size_t size = nla_total_size(0); /* MDBA_ROUTER */
56 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
58 size += __br_rports_one_size();
60 #if IS_ENABLED(CONFIG_IPV6)
61 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
63 size += __br_rports_one_size();
70 int br_rports_fill_info(struct sk_buff *skb,
71 const struct net_bridge_mcast *brmctx)
73 u16 vid = brmctx->vlan ? brmctx->vlan->vid : 0;
74 bool have_ip4_mc_rtr, have_ip6_mc_rtr;
75 unsigned long ip4_timer, ip6_timer;
76 struct nlattr *nest, *port_nest;
77 struct net_bridge_port *p;
79 if (!brmctx->multicast_router || !br_rports_have_mc_router(brmctx))
82 nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
86 list_for_each_entry_rcu(p, &brmctx->br->port_list, list) {
87 struct net_bridge_mcast_port *pmctx;
90 struct net_bridge_vlan *v;
92 v = br_vlan_find(nbp_vlan_group(p), vid);
95 pmctx = &v->port_mcast_ctx;
97 pmctx = &p->multicast_ctx;
100 have_ip4_mc_rtr = br_ip4_rports_get_timer(pmctx, &ip4_timer);
101 have_ip6_mc_rtr = br_ip6_rports_get_timer(pmctx, &ip6_timer);
103 if (!have_ip4_mc_rtr && !have_ip6_mc_rtr)
106 port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
110 if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
111 nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
112 max(ip4_timer, ip6_timer)) ||
113 nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
114 p->multicast_ctx.multicast_router) ||
116 nla_put_u32(skb, MDBA_ROUTER_PATTR_INET_TIMER,
119 nla_put_u32(skb, MDBA_ROUTER_PATTR_INET6_TIMER,
121 (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid))) {
122 nla_nest_cancel(skb, port_nest);
125 nla_nest_end(skb, port_nest);
128 nla_nest_end(skb, nest);
131 nla_nest_cancel(skb, nest);
135 static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
137 e->state = flags & MDB_PG_FLAGS_PERMANENT;
139 if (flags & MDB_PG_FLAGS_OFFLOAD)
140 e->flags |= MDB_FLAGS_OFFLOAD;
141 if (flags & MDB_PG_FLAGS_FAST_LEAVE)
142 e->flags |= MDB_FLAGS_FAST_LEAVE;
143 if (flags & MDB_PG_FLAGS_STAR_EXCL)
144 e->flags |= MDB_FLAGS_STAR_EXCL;
145 if (flags & MDB_PG_FLAGS_BLOCKED)
146 e->flags |= MDB_FLAGS_BLOCKED;
149 static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip,
150 struct nlattr **mdb_attrs)
152 memset(ip, 0, sizeof(struct br_ip));
153 ip->vid = entry->vid;
154 ip->proto = entry->addr.proto;
156 case htons(ETH_P_IP):
157 ip->dst.ip4 = entry->addr.u.ip4;
158 if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
159 ip->src.ip4 = nla_get_in_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
161 #if IS_ENABLED(CONFIG_IPV6)
162 case htons(ETH_P_IPV6):
163 ip->dst.ip6 = entry->addr.u.ip6;
164 if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
165 ip->src.ip6 = nla_get_in6_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
169 ether_addr_copy(ip->dst.mac_addr, entry->addr.u.mac_addr);
174 static int __mdb_fill_srcs(struct sk_buff *skb,
175 struct net_bridge_port_group *p)
177 struct net_bridge_group_src *ent;
178 struct nlattr *nest, *nest_ent;
180 if (hlist_empty(&p->src_list))
183 nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST);
187 hlist_for_each_entry_rcu(ent, &p->src_list, node,
188 lockdep_is_held(&p->key.port->br->multicast_lock)) {
189 nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY);
192 switch (ent->addr.proto) {
193 case htons(ETH_P_IP):
194 if (nla_put_in_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
195 ent->addr.src.ip4)) {
196 nla_nest_cancel(skb, nest_ent);
200 #if IS_ENABLED(CONFIG_IPV6)
201 case htons(ETH_P_IPV6):
202 if (nla_put_in6_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
203 &ent->addr.src.ip6)) {
204 nla_nest_cancel(skb, nest_ent);
210 nla_nest_cancel(skb, nest_ent);
213 if (nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER,
214 br_timer_value(&ent->timer))) {
215 nla_nest_cancel(skb, nest_ent);
218 nla_nest_end(skb, nest_ent);
221 nla_nest_end(skb, nest);
226 nla_nest_cancel(skb, nest);
230 static int __mdb_fill_info(struct sk_buff *skb,
231 struct net_bridge_mdb_entry *mp,
232 struct net_bridge_port_group *p)
234 bool dump_srcs_mode = false;
235 struct timer_list *mtimer;
236 struct nlattr *nest_ent;
237 struct br_mdb_entry e;
241 memset(&e, 0, sizeof(e));
243 ifindex = p->key.port->dev->ifindex;
247 ifindex = mp->br->dev->ifindex;
251 __mdb_entry_fill_flags(&e, flags);
253 e.vid = mp->addr.vid;
254 if (mp->addr.proto == htons(ETH_P_IP)) {
255 e.addr.u.ip4 = mp->addr.dst.ip4;
256 #if IS_ENABLED(CONFIG_IPV6)
257 } else if (mp->addr.proto == htons(ETH_P_IPV6)) {
258 e.addr.u.ip6 = mp->addr.dst.ip6;
261 ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
262 e.state = MDB_PERMANENT;
264 e.addr.proto = mp->addr.proto;
265 nest_ent = nla_nest_start_noflag(skb,
266 MDBA_MDB_ENTRY_INFO);
270 if (nla_put_nohdr(skb, sizeof(e), &e) ||
272 MDBA_MDB_EATTR_TIMER,
273 br_timer_value(mtimer)))
276 switch (mp->addr.proto) {
277 case htons(ETH_P_IP):
278 dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_igmp_version == 3);
279 if (mp->addr.src.ip4) {
280 if (nla_put_in_addr(skb, MDBA_MDB_EATTR_SOURCE,
286 #if IS_ENABLED(CONFIG_IPV6)
287 case htons(ETH_P_IPV6):
288 dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_mld_version == 2);
289 if (!ipv6_addr_any(&mp->addr.src.ip6)) {
290 if (nla_put_in6_addr(skb, MDBA_MDB_EATTR_SOURCE,
298 ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
301 if (nla_put_u8(skb, MDBA_MDB_EATTR_RTPROT, p->rt_protocol))
303 if (dump_srcs_mode &&
304 (__mdb_fill_srcs(skb, p) ||
305 nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE,
309 nla_nest_end(skb, nest_ent);
314 nla_nest_cancel(skb, nest_ent);
318 static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
319 struct net_device *dev)
321 int idx = 0, s_idx = cb->args[1], err = 0, pidx = 0, s_pidx = cb->args[2];
322 struct net_bridge *br = netdev_priv(dev);
323 struct net_bridge_mdb_entry *mp;
324 struct nlattr *nest, *nest2;
326 nest = nla_nest_start_noflag(skb, MDBA_MDB);
330 hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) {
331 struct net_bridge_port_group *p;
332 struct net_bridge_port_group __rcu **pp;
337 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
343 if (!s_pidx && mp->host_joined) {
344 err = __mdb_fill_info(skb, mp, NULL);
346 nla_nest_cancel(skb, nest2);
351 for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
358 err = __mdb_fill_info(skb, mp, p);
360 nla_nest_end(skb, nest2);
368 nla_nest_end(skb, nest2);
376 nla_nest_end(skb, nest);
380 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
381 struct netlink_callback *cb)
383 struct net_bridge *br = netdev_priv(dev);
384 struct br_port_msg *bpm;
385 struct nlmsghdr *nlh;
388 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
389 cb->nlh->nlmsg_seq, RTM_GETMDB, sizeof(*bpm),
394 bpm = nlmsg_data(nlh);
395 memset(bpm, 0, sizeof(*bpm));
396 bpm->ifindex = dev->ifindex;
400 err = br_mdb_fill_info(skb, cb, dev);
403 err = br_rports_fill_info(skb, &br->multicast_ctx);
413 static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
414 struct net_device *dev,
415 struct net_bridge_mdb_entry *mp,
416 struct net_bridge_port_group *pg,
419 struct nlmsghdr *nlh;
420 struct br_port_msg *bpm;
421 struct nlattr *nest, *nest2;
423 nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0);
427 bpm = nlmsg_data(nlh);
428 memset(bpm, 0, sizeof(*bpm));
429 bpm->family = AF_BRIDGE;
430 bpm->ifindex = dev->ifindex;
431 nest = nla_nest_start_noflag(skb, MDBA_MDB);
434 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
438 if (__mdb_fill_info(skb, mp, pg))
441 nla_nest_end(skb, nest2);
442 nla_nest_end(skb, nest);
447 nla_nest_end(skb, nest);
449 nlmsg_cancel(skb, nlh);
453 static size_t rtnl_mdb_nlmsg_pg_size(const struct net_bridge_port_group *pg)
455 struct net_bridge_group_src *ent;
456 size_t nlmsg_size, addr_size = 0;
458 /* MDBA_MDB_ENTRY_INFO */
459 nlmsg_size = nla_total_size(sizeof(struct br_mdb_entry)) +
460 /* MDBA_MDB_EATTR_TIMER */
461 nla_total_size(sizeof(u32));
466 /* MDBA_MDB_EATTR_RTPROT */
467 nlmsg_size += nla_total_size(sizeof(u8));
469 switch (pg->key.addr.proto) {
470 case htons(ETH_P_IP):
471 /* MDBA_MDB_EATTR_SOURCE */
472 if (pg->key.addr.src.ip4)
473 nlmsg_size += nla_total_size(sizeof(__be32));
474 if (pg->key.port->br->multicast_ctx.multicast_igmp_version == 2)
476 addr_size = sizeof(__be32);
478 #if IS_ENABLED(CONFIG_IPV6)
479 case htons(ETH_P_IPV6):
480 /* MDBA_MDB_EATTR_SOURCE */
481 if (!ipv6_addr_any(&pg->key.addr.src.ip6))
482 nlmsg_size += nla_total_size(sizeof(struct in6_addr));
483 if (pg->key.port->br->multicast_ctx.multicast_mld_version == 1)
485 addr_size = sizeof(struct in6_addr);
490 /* MDBA_MDB_EATTR_GROUP_MODE */
491 nlmsg_size += nla_total_size(sizeof(u8));
493 /* MDBA_MDB_EATTR_SRC_LIST nested attr */
494 if (!hlist_empty(&pg->src_list))
495 nlmsg_size += nla_total_size(0);
497 hlist_for_each_entry(ent, &pg->src_list, node) {
498 /* MDBA_MDB_SRCLIST_ENTRY nested attr +
499 * MDBA_MDB_SRCATTR_ADDRESS + MDBA_MDB_SRCATTR_TIMER
501 nlmsg_size += nla_total_size(0) +
502 nla_total_size(addr_size) +
503 nla_total_size(sizeof(u32));
509 static size_t rtnl_mdb_nlmsg_size(const struct net_bridge_port_group *pg)
511 return NLMSG_ALIGN(sizeof(struct br_port_msg)) +
516 /* Port group entry */
517 rtnl_mdb_nlmsg_pg_size(pg);
520 void br_mdb_notify(struct net_device *dev,
521 struct net_bridge_mdb_entry *mp,
522 struct net_bridge_port_group *pg,
525 struct net *net = dev_net(dev);
529 br_switchdev_mdb_notify(dev, mp, pg, type);
531 skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC);
535 err = nlmsg_populate_mdb_fill(skb, dev, mp, pg, type);
541 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
544 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
547 static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
548 struct net_device *dev,
549 int ifindex, u16 vid, u32 pid,
550 u32 seq, int type, unsigned int flags)
552 struct nlattr *nest, *port_nest;
553 struct br_port_msg *bpm;
554 struct nlmsghdr *nlh;
556 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
560 bpm = nlmsg_data(nlh);
561 memset(bpm, 0, sizeof(*bpm));
562 bpm->family = AF_BRIDGE;
563 bpm->ifindex = dev->ifindex;
564 nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
568 port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
571 if (nla_put_nohdr(skb, sizeof(u32), &ifindex)) {
572 nla_nest_cancel(skb, port_nest);
575 if (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid)) {
576 nla_nest_cancel(skb, port_nest);
579 nla_nest_end(skb, port_nest);
581 nla_nest_end(skb, nest);
586 nla_nest_end(skb, nest);
588 nlmsg_cancel(skb, nlh);
592 static inline size_t rtnl_rtr_nlmsg_size(void)
594 return NLMSG_ALIGN(sizeof(struct br_port_msg))
595 + nla_total_size(sizeof(__u32))
596 + nla_total_size(sizeof(u16));
599 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
602 struct net *net = dev_net(dev);
608 ifindex = pmctx ? pmctx->port->dev->ifindex : 0;
609 vid = pmctx && br_multicast_port_ctx_is_vlan(pmctx) ? pmctx->vlan->vid :
611 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
615 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, vid, 0, 0, type,
622 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
626 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
629 static const struct nla_policy
630 br_mdbe_src_list_entry_pol[MDBE_SRCATTR_MAX + 1] = {
631 [MDBE_SRCATTR_ADDRESS] = NLA_POLICY_RANGE(NLA_BINARY,
632 sizeof(struct in_addr),
633 sizeof(struct in6_addr)),
636 static const struct nla_policy
637 br_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = {
638 [MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(br_mdbe_src_list_entry_pol),
641 static const struct nla_policy br_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = {
642 [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
643 sizeof(struct in_addr),
644 sizeof(struct in6_addr)),
645 [MDBE_ATTR_GROUP_MODE] = NLA_POLICY_RANGE(NLA_U8, MCAST_EXCLUDE,
647 [MDBE_ATTR_SRC_LIST] = NLA_POLICY_NESTED(br_mdbe_src_list_pol),
648 [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
651 static bool is_valid_mdb_source(struct nlattr *attr, __be16 proto,
652 struct netlink_ext_ack *extack)
655 case htons(ETH_P_IP):
656 if (nla_len(attr) != sizeof(struct in_addr)) {
657 NL_SET_ERR_MSG_MOD(extack, "IPv4 invalid source address length");
660 if (ipv4_is_multicast(nla_get_in_addr(attr))) {
661 NL_SET_ERR_MSG_MOD(extack, "IPv4 multicast source address is not allowed");
665 #if IS_ENABLED(CONFIG_IPV6)
666 case htons(ETH_P_IPV6): {
669 if (nla_len(attr) != sizeof(struct in6_addr)) {
670 NL_SET_ERR_MSG_MOD(extack, "IPv6 invalid source address length");
673 src = nla_get_in6_addr(attr);
674 if (ipv6_addr_is_multicast(&src)) {
675 NL_SET_ERR_MSG_MOD(extack, "IPv6 multicast source address is not allowed");
682 NL_SET_ERR_MSG_MOD(extack, "Invalid protocol used with source address");
689 static struct net_bridge_mcast *
690 __br_mdb_choose_context(struct net_bridge *br,
691 const struct br_mdb_entry *entry,
692 struct netlink_ext_ack *extack)
694 struct net_bridge_mcast *brmctx = NULL;
695 struct net_bridge_vlan *v;
697 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
698 brmctx = &br->multicast_ctx;
703 NL_SET_ERR_MSG_MOD(extack, "Cannot add an entry without a vlan when vlan snooping is enabled");
707 v = br_vlan_find(br_vlan_group(br), entry->vid);
709 NL_SET_ERR_MSG_MOD(extack, "Vlan is not configured");
712 if (br_multicast_ctx_vlan_global_disabled(&v->br_mcast_ctx)) {
713 NL_SET_ERR_MSG_MOD(extack, "Vlan's multicast processing is disabled");
716 brmctx = &v->br_mcast_ctx;
721 static int br_mdb_replace_group_sg(const struct br_mdb_config *cfg,
722 struct net_bridge_mdb_entry *mp,
723 struct net_bridge_port_group *pg,
724 struct net_bridge_mcast *brmctx,
727 unsigned long now = jiffies;
730 pg->rt_protocol = cfg->rt_protocol;
731 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
732 mod_timer(&pg->timer,
733 now + brmctx->multicast_membership_interval);
735 del_timer(&pg->timer);
737 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
742 static int br_mdb_add_group_sg(const struct br_mdb_config *cfg,
743 struct net_bridge_mdb_entry *mp,
744 struct net_bridge_mcast *brmctx,
746 struct netlink_ext_ack *extack)
748 struct net_bridge_port_group __rcu **pp;
749 struct net_bridge_port_group *p;
750 unsigned long now = jiffies;
752 for (pp = &mp->ports;
753 (p = mlock_dereference(*pp, cfg->br)) != NULL;
755 if (p->key.port == cfg->p) {
756 if (!(cfg->nlflags & NLM_F_REPLACE)) {
757 NL_SET_ERR_MSG_MOD(extack, "(S, G) group is already joined by port");
760 return br_mdb_replace_group_sg(cfg, mp, p, brmctx,
763 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
767 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
768 MCAST_INCLUDE, cfg->rt_protocol, extack);
772 rcu_assign_pointer(*pp, p);
773 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
775 now + brmctx->multicast_membership_interval);
776 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
778 /* All of (*, G) EXCLUDE ports need to be added to the new (S, G) for
779 * proper replication.
781 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto)) {
782 struct net_bridge_mdb_entry *star_mp;
783 struct br_ip star_group;
785 star_group = p->key.addr;
786 memset(&star_group.src, 0, sizeof(star_group.src));
787 star_mp = br_mdb_ip_get(cfg->br, &star_group);
789 br_multicast_sg_add_exclude_ports(star_mp, p);
795 static int br_mdb_add_group_src_fwd(const struct br_mdb_config *cfg,
796 struct br_ip *src_ip,
797 struct net_bridge_mcast *brmctx,
798 struct netlink_ext_ack *extack)
800 struct net_bridge_mdb_entry *sgmp;
801 struct br_mdb_config sg_cfg;
806 sg_ip.src = src_ip->src;
807 sgmp = br_multicast_new_group(cfg->br, &sg_ip);
809 NL_SET_ERR_MSG_MOD(extack, "Failed to add (S, G) MDB entry");
810 return PTR_ERR(sgmp);
813 if (cfg->entry->state == MDB_PERMANENT)
814 flags |= MDB_PG_FLAGS_PERMANENT;
815 if (cfg->filter_mode == MCAST_EXCLUDE)
816 flags |= MDB_PG_FLAGS_BLOCKED;
818 memset(&sg_cfg, 0, sizeof(sg_cfg));
821 sg_cfg.entry = cfg->entry;
822 sg_cfg.group = sg_ip;
823 sg_cfg.src_entry = true;
824 sg_cfg.filter_mode = MCAST_INCLUDE;
825 sg_cfg.rt_protocol = cfg->rt_protocol;
826 sg_cfg.nlflags = cfg->nlflags;
827 return br_mdb_add_group_sg(&sg_cfg, sgmp, brmctx, flags, extack);
830 static int br_mdb_add_group_src(const struct br_mdb_config *cfg,
831 struct net_bridge_port_group *pg,
832 struct net_bridge_mcast *brmctx,
833 struct br_mdb_src_entry *src,
834 struct netlink_ext_ack *extack)
836 struct net_bridge_group_src *ent;
837 unsigned long now = jiffies;
840 ent = br_multicast_find_group_src(pg, &src->addr);
842 ent = br_multicast_new_group_src(pg, &src->addr);
844 NL_SET_ERR_MSG_MOD(extack, "Failed to add new source entry");
847 } else if (!(cfg->nlflags & NLM_F_REPLACE)) {
848 NL_SET_ERR_MSG_MOD(extack, "Source entry already exists");
852 if (cfg->filter_mode == MCAST_INCLUDE &&
853 cfg->entry->state == MDB_TEMPORARY)
854 mod_timer(&ent->timer, now + br_multicast_gmi(brmctx));
856 del_timer(&ent->timer);
858 /* Install a (S, G) forwarding entry for the source. */
859 err = br_mdb_add_group_src_fwd(cfg, &src->addr, brmctx, extack);
863 ent->flags = BR_SGRP_F_INSTALLED | BR_SGRP_F_USER_ADDED;
868 __br_multicast_del_group_src(ent);
872 static void br_mdb_del_group_src(struct net_bridge_port_group *pg,
873 struct br_mdb_src_entry *src)
875 struct net_bridge_group_src *ent;
877 ent = br_multicast_find_group_src(pg, &src->addr);
878 if (WARN_ON_ONCE(!ent))
880 br_multicast_del_group_src(ent, false);
883 static int br_mdb_add_group_srcs(const struct br_mdb_config *cfg,
884 struct net_bridge_port_group *pg,
885 struct net_bridge_mcast *brmctx,
886 struct netlink_ext_ack *extack)
890 for (i = 0; i < cfg->num_src_entries; i++) {
891 err = br_mdb_add_group_src(cfg, pg, brmctx,
892 &cfg->src_entries[i], extack);
894 goto err_del_group_srcs;
900 for (i--; i >= 0; i--)
901 br_mdb_del_group_src(pg, &cfg->src_entries[i]);
905 static int br_mdb_replace_group_srcs(const struct br_mdb_config *cfg,
906 struct net_bridge_port_group *pg,
907 struct net_bridge_mcast *brmctx,
908 struct netlink_ext_ack *extack)
910 struct net_bridge_group_src *ent;
911 struct hlist_node *tmp;
914 hlist_for_each_entry(ent, &pg->src_list, node)
915 ent->flags |= BR_SGRP_F_DELETE;
917 err = br_mdb_add_group_srcs(cfg, pg, brmctx, extack);
919 goto err_clear_delete;
921 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) {
922 if (ent->flags & BR_SGRP_F_DELETE)
923 br_multicast_del_group_src(ent, false);
929 hlist_for_each_entry(ent, &pg->src_list, node)
930 ent->flags &= ~BR_SGRP_F_DELETE;
934 static int br_mdb_replace_group_star_g(const struct br_mdb_config *cfg,
935 struct net_bridge_mdb_entry *mp,
936 struct net_bridge_port_group *pg,
937 struct net_bridge_mcast *brmctx,
939 struct netlink_ext_ack *extack)
941 unsigned long now = jiffies;
944 err = br_mdb_replace_group_srcs(cfg, pg, brmctx, extack);
949 pg->filter_mode = cfg->filter_mode;
950 pg->rt_protocol = cfg->rt_protocol;
951 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
952 cfg->filter_mode == MCAST_EXCLUDE)
953 mod_timer(&pg->timer,
954 now + brmctx->multicast_membership_interval);
956 del_timer(&pg->timer);
958 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
960 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto))
961 br_multicast_star_g_handle_mode(pg, cfg->filter_mode);
966 static int br_mdb_add_group_star_g(const struct br_mdb_config *cfg,
967 struct net_bridge_mdb_entry *mp,
968 struct net_bridge_mcast *brmctx,
970 struct netlink_ext_ack *extack)
972 struct net_bridge_port_group __rcu **pp;
973 struct net_bridge_port_group *p;
974 unsigned long now = jiffies;
977 for (pp = &mp->ports;
978 (p = mlock_dereference(*pp, cfg->br)) != NULL;
980 if (p->key.port == cfg->p) {
981 if (!(cfg->nlflags & NLM_F_REPLACE)) {
982 NL_SET_ERR_MSG_MOD(extack, "(*, G) group is already joined by port");
985 return br_mdb_replace_group_star_g(cfg, mp, p, brmctx,
988 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
992 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
993 cfg->filter_mode, cfg->rt_protocol,
998 err = br_mdb_add_group_srcs(cfg, p, brmctx, extack);
1000 goto err_del_port_group;
1002 rcu_assign_pointer(*pp, p);
1003 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
1004 cfg->filter_mode == MCAST_EXCLUDE)
1005 mod_timer(&p->timer,
1006 now + brmctx->multicast_membership_interval);
1007 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
1008 /* If we are adding a new EXCLUDE port group (*, G), it needs to be
1009 * also added to all (S, G) entries for proper replication.
1011 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto) &&
1012 cfg->filter_mode == MCAST_EXCLUDE)
1013 br_multicast_star_g_handle_mode(p, MCAST_EXCLUDE);
1018 br_multicast_del_port_group(p);
1022 static int br_mdb_add_group(const struct br_mdb_config *cfg,
1023 struct netlink_ext_ack *extack)
1025 struct br_mdb_entry *entry = cfg->entry;
1026 struct net_bridge_port *port = cfg->p;
1027 struct net_bridge_mdb_entry *mp;
1028 struct net_bridge *br = cfg->br;
1029 struct net_bridge_mcast *brmctx;
1030 struct br_ip group = cfg->group;
1031 unsigned char flags = 0;
1033 brmctx = __br_mdb_choose_context(br, entry, extack);
1037 mp = br_multicast_new_group(br, &group);
1043 if (mp->host_joined) {
1044 NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
1048 br_multicast_host_join(brmctx, mp, false);
1049 br_mdb_notify(br->dev, mp, NULL, RTM_NEWMDB);
1054 if (entry->state == MDB_PERMANENT)
1055 flags |= MDB_PG_FLAGS_PERMANENT;
1057 if (br_multicast_is_star_g(&group))
1058 return br_mdb_add_group_star_g(cfg, mp, brmctx, flags, extack);
1060 return br_mdb_add_group_sg(cfg, mp, brmctx, flags, extack);
1063 static int __br_mdb_add(const struct br_mdb_config *cfg,
1064 struct netlink_ext_ack *extack)
1068 spin_lock_bh(&cfg->br->multicast_lock);
1069 ret = br_mdb_add_group(cfg, extack);
1070 spin_unlock_bh(&cfg->br->multicast_lock);
1075 static int br_mdb_config_src_entry_init(struct nlattr *src_entry,
1076 struct br_mdb_src_entry *src,
1078 struct netlink_ext_ack *extack)
1080 struct nlattr *tb[MDBE_SRCATTR_MAX + 1];
1083 err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry,
1084 br_mdbe_src_list_entry_pol, extack);
1088 if (NL_REQ_ATTR_CHECK(extack, src_entry, tb, MDBE_SRCATTR_ADDRESS))
1091 if (!is_valid_mdb_source(tb[MDBE_SRCATTR_ADDRESS], proto, extack))
1094 src->addr.proto = proto;
1095 nla_memcpy(&src->addr.src, tb[MDBE_SRCATTR_ADDRESS],
1096 nla_len(tb[MDBE_SRCATTR_ADDRESS]));
1101 static int br_mdb_config_src_list_init(struct nlattr *src_list,
1102 struct br_mdb_config *cfg,
1103 struct netlink_ext_ack *extack)
1105 struct nlattr *src_entry;
1109 nla_for_each_nested(src_entry, src_list, rem)
1110 cfg->num_src_entries++;
1112 if (cfg->num_src_entries >= PG_SRC_ENT_LIMIT) {
1113 NL_SET_ERR_MSG_FMT_MOD(extack, "Exceeded maximum number of source entries (%u)",
1114 PG_SRC_ENT_LIMIT - 1);
1118 cfg->src_entries = kcalloc(cfg->num_src_entries,
1119 sizeof(struct br_mdb_src_entry), GFP_KERNEL);
1120 if (!cfg->src_entries)
1123 nla_for_each_nested(src_entry, src_list, rem) {
1124 err = br_mdb_config_src_entry_init(src_entry,
1125 &cfg->src_entries[i],
1126 cfg->entry->addr.proto,
1129 goto err_src_entry_init;
1136 kfree(cfg->src_entries);
1140 static void br_mdb_config_src_list_fini(struct br_mdb_config *cfg)
1142 kfree(cfg->src_entries);
1145 static int br_mdb_config_attrs_init(struct nlattr *set_attrs,
1146 struct br_mdb_config *cfg,
1147 struct netlink_ext_ack *extack)
1149 struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1];
1152 err = nla_parse_nested(mdb_attrs, MDBE_ATTR_MAX, set_attrs,
1153 br_mdbe_attrs_pol, extack);
1157 if (mdb_attrs[MDBE_ATTR_SOURCE] &&
1158 !is_valid_mdb_source(mdb_attrs[MDBE_ATTR_SOURCE],
1159 cfg->entry->addr.proto, extack))
1162 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, mdb_attrs);
1164 if (mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1166 NL_SET_ERR_MSG_MOD(extack, "Filter mode cannot be set for host groups");
1169 if (!br_multicast_is_star_g(&cfg->group)) {
1170 NL_SET_ERR_MSG_MOD(extack, "Filter mode can only be set for (*, G) entries");
1173 cfg->filter_mode = nla_get_u8(mdb_attrs[MDBE_ATTR_GROUP_MODE]);
1175 cfg->filter_mode = MCAST_EXCLUDE;
1178 if (mdb_attrs[MDBE_ATTR_SRC_LIST]) {
1180 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set for host groups");
1183 if (!br_multicast_is_star_g(&cfg->group)) {
1184 NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries");
1187 if (!mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1188 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode");
1191 err = br_mdb_config_src_list_init(mdb_attrs[MDBE_ATTR_SRC_LIST],
1197 if (!cfg->num_src_entries && cfg->filter_mode == MCAST_INCLUDE) {
1198 NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list");
1202 if (mdb_attrs[MDBE_ATTR_RTPROT]) {
1204 NL_SET_ERR_MSG_MOD(extack, "Protocol cannot be set for host groups");
1207 cfg->rt_protocol = nla_get_u8(mdb_attrs[MDBE_ATTR_RTPROT]);
1213 static int br_mdb_config_init(struct br_mdb_config *cfg, struct net_device *dev,
1214 struct nlattr *tb[], u16 nlmsg_flags,
1215 struct netlink_ext_ack *extack)
1217 struct net *net = dev_net(dev);
1219 memset(cfg, 0, sizeof(*cfg));
1220 cfg->filter_mode = MCAST_EXCLUDE;
1221 cfg->rt_protocol = RTPROT_STATIC;
1222 cfg->nlflags = nlmsg_flags;
1224 cfg->br = netdev_priv(dev);
1226 if (!netif_running(cfg->br->dev)) {
1227 NL_SET_ERR_MSG_MOD(extack, "Bridge device is not running");
1231 if (!br_opt_get(cfg->br, BROPT_MULTICAST_ENABLED)) {
1232 NL_SET_ERR_MSG_MOD(extack, "Bridge's multicast processing is disabled");
1236 cfg->entry = nla_data(tb[MDBA_SET_ENTRY]);
1238 if (cfg->entry->ifindex != cfg->br->dev->ifindex) {
1239 struct net_device *pdev;
1241 pdev = __dev_get_by_index(net, cfg->entry->ifindex);
1243 NL_SET_ERR_MSG_MOD(extack, "Port net device doesn't exist");
1247 cfg->p = br_port_get_rtnl(pdev);
1249 NL_SET_ERR_MSG_MOD(extack, "Net device is not a bridge port");
1253 if (cfg->p->br != cfg->br) {
1254 NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device");
1259 if (cfg->entry->addr.proto == htons(ETH_P_IP) &&
1260 ipv4_is_zeronet(cfg->entry->addr.u.ip4)) {
1261 NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address 0.0.0.0 is not allowed");
1265 if (tb[MDBA_SET_ENTRY_ATTRS])
1266 return br_mdb_config_attrs_init(tb[MDBA_SET_ENTRY_ATTRS], cfg,
1269 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, NULL);
1274 static void br_mdb_config_fini(struct br_mdb_config *cfg)
1276 br_mdb_config_src_list_fini(cfg);
1279 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1280 struct netlink_ext_ack *extack)
1282 struct net_bridge_vlan_group *vg;
1283 struct net_bridge_vlan *v;
1284 struct br_mdb_config cfg;
1287 err = br_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack);
1292 /* host join errors which can happen before creating the group */
1293 if (!cfg.p && !br_group_is_l2(&cfg.group)) {
1294 /* don't allow any flags for host-joined IP groups */
1295 if (cfg.entry->state) {
1296 NL_SET_ERR_MSG_MOD(extack, "Flags are not allowed for host groups");
1299 if (!br_multicast_is_star_g(&cfg.group)) {
1300 NL_SET_ERR_MSG_MOD(extack, "Groups with sources cannot be manually host joined");
1305 if (br_group_is_l2(&cfg.group) && cfg.entry->state != MDB_PERMANENT) {
1306 NL_SET_ERR_MSG_MOD(extack, "Only permanent L2 entries allowed");
1311 if (cfg.p->state == BR_STATE_DISABLED && cfg.entry->state != MDB_PERMANENT) {
1312 NL_SET_ERR_MSG_MOD(extack, "Port is in disabled state and entry is not permanent");
1315 vg = nbp_vlan_group(cfg.p);
1317 vg = br_vlan_group(cfg.br);
1320 /* If vlan filtering is enabled and VLAN is not specified
1321 * install mdb entry on all vlans configured on the port.
1323 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
1324 list_for_each_entry(v, &vg->vlan_list, vlist) {
1325 cfg.entry->vid = v->vid;
1326 cfg.group.vid = v->vid;
1327 err = __br_mdb_add(&cfg, extack);
1332 err = __br_mdb_add(&cfg, extack);
1336 br_mdb_config_fini(&cfg);
1340 static int __br_mdb_del(const struct br_mdb_config *cfg)
1342 struct br_mdb_entry *entry = cfg->entry;
1343 struct net_bridge *br = cfg->br;
1344 struct net_bridge_mdb_entry *mp;
1345 struct net_bridge_port_group *p;
1346 struct net_bridge_port_group __rcu **pp;
1347 struct br_ip ip = cfg->group;
1350 spin_lock_bh(&br->multicast_lock);
1351 mp = br_mdb_ip_get(br, &ip);
1356 if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) {
1357 br_multicast_host_leave(mp, false);
1359 br_mdb_notify(br->dev, mp, NULL, RTM_DELMDB);
1360 if (!mp->ports && netif_running(br->dev))
1361 mod_timer(&mp->timer, jiffies);
1365 for (pp = &mp->ports;
1366 (p = mlock_dereference(*pp, br)) != NULL;
1368 if (!p->key.port || p->key.port->dev->ifindex != entry->ifindex)
1371 br_multicast_del_pg(mp, p, pp);
1377 spin_unlock_bh(&br->multicast_lock);
1381 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1382 struct netlink_ext_ack *extack)
1384 struct net_bridge_vlan_group *vg;
1385 struct net_bridge_vlan *v;
1386 struct br_mdb_config cfg;
1389 err = br_mdb_config_init(&cfg, dev, tb, 0, extack);
1394 vg = nbp_vlan_group(cfg.p);
1396 vg = br_vlan_group(cfg.br);
1398 /* If vlan filtering is enabled and VLAN is not specified
1399 * delete mdb entry on all vlans configured on the port.
1401 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
1402 list_for_each_entry(v, &vg->vlan_list, vlist) {
1403 cfg.entry->vid = v->vid;
1404 cfg.group.vid = v->vid;
1405 err = __br_mdb_del(&cfg);
1408 err = __br_mdb_del(&cfg);
1411 br_mdb_config_fini(&cfg);
1415 struct br_mdb_flush_desc {
1423 static const struct nla_policy br_mdbe_attrs_del_bulk_pol[MDBE_ATTR_MAX + 1] = {
1424 [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
1425 [MDBE_ATTR_STATE_MASK] = NLA_POLICY_MASK(NLA_U8, MDB_PERMANENT),
1428 static int br_mdb_flush_desc_init(struct br_mdb_flush_desc *desc,
1429 struct nlattr *tb[],
1430 struct netlink_ext_ack *extack)
1432 struct br_mdb_entry *entry = nla_data(tb[MDBA_SET_ENTRY]);
1433 struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1];
1436 desc->port_ifindex = entry->ifindex;
1437 desc->vid = entry->vid;
1438 desc->state = entry->state;
1440 if (!tb[MDBA_SET_ENTRY_ATTRS])
1443 err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX,
1444 tb[MDBA_SET_ENTRY_ATTRS],
1445 br_mdbe_attrs_del_bulk_pol, extack);
1449 if (mdbe_attrs[MDBE_ATTR_STATE_MASK])
1450 desc->state_mask = nla_get_u8(mdbe_attrs[MDBE_ATTR_STATE_MASK]);
1452 if (mdbe_attrs[MDBE_ATTR_RTPROT])
1453 desc->rt_protocol = nla_get_u8(mdbe_attrs[MDBE_ATTR_RTPROT]);
1458 static void br_mdb_flush_host(struct net_bridge *br,
1459 struct net_bridge_mdb_entry *mp,
1460 const struct br_mdb_flush_desc *desc)
1464 if (desc->port_ifindex && desc->port_ifindex != br->dev->ifindex)
1467 if (desc->rt_protocol)
1470 state = br_group_is_l2(&mp->addr) ? MDB_PERMANENT : 0;
1471 if (desc->state_mask && (state & desc->state_mask) != desc->state)
1474 br_multicast_host_leave(mp, true);
1475 if (!mp->ports && netif_running(br->dev))
1476 mod_timer(&mp->timer, jiffies);
1479 static void br_mdb_flush_pgs(struct net_bridge *br,
1480 struct net_bridge_mdb_entry *mp,
1481 const struct br_mdb_flush_desc *desc)
1483 struct net_bridge_port_group __rcu **pp;
1484 struct net_bridge_port_group *p;
1486 for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL;) {
1489 if (desc->port_ifindex &&
1490 desc->port_ifindex != p->key.port->dev->ifindex) {
1495 if (desc->rt_protocol && desc->rt_protocol != p->rt_protocol) {
1500 state = p->flags & MDB_PG_FLAGS_PERMANENT ? MDB_PERMANENT : 0;
1501 if (desc->state_mask &&
1502 (state & desc->state_mask) != desc->state) {
1507 br_multicast_del_pg(mp, p, pp);
1511 static void br_mdb_flush(struct net_bridge *br,
1512 const struct br_mdb_flush_desc *desc)
1514 struct net_bridge_mdb_entry *mp;
1516 spin_lock_bh(&br->multicast_lock);
1518 /* Safe variant is not needed because entries are removed from the list
1519 * upon group timer expiration or bridge deletion.
1521 hlist_for_each_entry(mp, &br->mdb_list, mdb_node) {
1522 if (desc->vid && desc->vid != mp->addr.vid)
1525 br_mdb_flush_host(br, mp, desc);
1526 br_mdb_flush_pgs(br, mp, desc);
1529 spin_unlock_bh(&br->multicast_lock);
1532 int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1533 struct netlink_ext_ack *extack)
1535 struct net_bridge *br = netdev_priv(dev);
1536 struct br_mdb_flush_desc desc = {};
1539 err = br_mdb_flush_desc_init(&desc, tb, extack);
1543 br_mdb_flush(br, &desc);
1548 static const struct nla_policy br_mdbe_attrs_get_pol[MDBE_ATTR_MAX + 1] = {
1549 [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
1550 sizeof(struct in_addr),
1551 sizeof(struct in6_addr)),
1554 static int br_mdb_get_parse(struct net_device *dev, struct nlattr *tb[],
1555 struct br_ip *group, struct netlink_ext_ack *extack)
1557 struct br_mdb_entry *entry = nla_data(tb[MDBA_GET_ENTRY]);
1558 struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1];
1561 if (!tb[MDBA_GET_ENTRY_ATTRS]) {
1562 __mdb_entry_to_br_ip(entry, group, NULL);
1566 err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX,
1567 tb[MDBA_GET_ENTRY_ATTRS], br_mdbe_attrs_get_pol,
1572 if (mdbe_attrs[MDBE_ATTR_SOURCE] &&
1573 !is_valid_mdb_source(mdbe_attrs[MDBE_ATTR_SOURCE],
1574 entry->addr.proto, extack))
1577 __mdb_entry_to_br_ip(entry, group, mdbe_attrs);
1582 static struct sk_buff *
1583 br_mdb_get_reply_alloc(const struct net_bridge_mdb_entry *mp)
1585 struct net_bridge_port_group *pg;
1588 nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
1591 /* MDBA_MDB_ENTRY */
1594 if (mp->host_joined)
1595 nlmsg_size += rtnl_mdb_nlmsg_pg_size(NULL);
1597 for (pg = mlock_dereference(mp->ports, mp->br); pg;
1598 pg = mlock_dereference(pg->next, mp->br))
1599 nlmsg_size += rtnl_mdb_nlmsg_pg_size(pg);
1601 return nlmsg_new(nlmsg_size, GFP_ATOMIC);
1604 static int br_mdb_get_reply_fill(struct sk_buff *skb,
1605 struct net_bridge_mdb_entry *mp, u32 portid,
1608 struct nlattr *mdb_nest, *mdb_entry_nest;
1609 struct net_bridge_port_group *pg;
1610 struct br_port_msg *bpm;
1611 struct nlmsghdr *nlh;
1614 nlh = nlmsg_put(skb, portid, seq, RTM_NEWMDB, sizeof(*bpm), 0);
1618 bpm = nlmsg_data(nlh);
1619 memset(bpm, 0, sizeof(*bpm));
1620 bpm->family = AF_BRIDGE;
1621 bpm->ifindex = mp->br->dev->ifindex;
1622 mdb_nest = nla_nest_start_noflag(skb, MDBA_MDB);
1627 mdb_entry_nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
1628 if (!mdb_entry_nest) {
1633 if (mp->host_joined) {
1634 err = __mdb_fill_info(skb, mp, NULL);
1639 for (pg = mlock_dereference(mp->ports, mp->br); pg;
1640 pg = mlock_dereference(pg->next, mp->br)) {
1641 err = __mdb_fill_info(skb, mp, pg);
1646 nla_nest_end(skb, mdb_entry_nest);
1647 nla_nest_end(skb, mdb_nest);
1648 nlmsg_end(skb, nlh);
1653 nlmsg_cancel(skb, nlh);
1657 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1658 struct netlink_ext_ack *extack)
1660 struct net_bridge *br = netdev_priv(dev);
1661 struct net_bridge_mdb_entry *mp;
1662 struct sk_buff *skb;
1666 err = br_mdb_get_parse(dev, tb, &group, extack);
1670 /* Hold the multicast lock to ensure that the MDB entry does not change
1671 * between the time the reply size is determined and when the reply is
1674 spin_lock_bh(&br->multicast_lock);
1676 mp = br_mdb_ip_get(br, &group);
1678 NL_SET_ERR_MSG_MOD(extack, "MDB entry not found");
1683 skb = br_mdb_get_reply_alloc(mp);
1689 err = br_mdb_get_reply_fill(skb, mp, portid, seq);
1691 NL_SET_ERR_MSG_MOD(extack, "Failed to fill MDB get reply");
1695 spin_unlock_bh(&br->multicast_lock);
1697 return rtnl_unicast(skb, dev_net(dev), portid);
1702 spin_unlock_bh(&br->multicast_lock);