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 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
329 nest = nla_nest_start_noflag(skb, MDBA_MDB);
333 hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) {
334 struct net_bridge_port_group *p;
335 struct net_bridge_port_group __rcu **pp;
340 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
346 if (!s_pidx && mp->host_joined) {
347 err = __mdb_fill_info(skb, mp, NULL);
349 nla_nest_cancel(skb, nest2);
354 for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
361 err = __mdb_fill_info(skb, mp, p);
363 nla_nest_end(skb, nest2);
371 nla_nest_end(skb, nest2);
379 nla_nest_end(skb, nest);
383 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
384 struct netlink_callback *cb)
386 struct net_bridge *br = netdev_priv(dev);
387 struct br_port_msg *bpm;
388 struct nlmsghdr *nlh;
391 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
392 cb->nlh->nlmsg_seq, RTM_GETMDB, sizeof(*bpm),
397 bpm = nlmsg_data(nlh);
398 memset(bpm, 0, sizeof(*bpm));
399 bpm->ifindex = dev->ifindex;
403 err = br_mdb_fill_info(skb, cb, dev);
406 err = br_rports_fill_info(skb, &br->multicast_ctx);
416 static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
417 struct net_device *dev,
418 struct net_bridge_mdb_entry *mp,
419 struct net_bridge_port_group *pg,
422 struct nlmsghdr *nlh;
423 struct br_port_msg *bpm;
424 struct nlattr *nest, *nest2;
426 nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0);
430 bpm = nlmsg_data(nlh);
431 memset(bpm, 0, sizeof(*bpm));
432 bpm->family = AF_BRIDGE;
433 bpm->ifindex = dev->ifindex;
434 nest = nla_nest_start_noflag(skb, MDBA_MDB);
437 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
441 if (__mdb_fill_info(skb, mp, pg))
444 nla_nest_end(skb, nest2);
445 nla_nest_end(skb, nest);
450 nla_nest_end(skb, nest);
452 nlmsg_cancel(skb, nlh);
456 static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg)
458 size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
459 nla_total_size(sizeof(struct br_mdb_entry)) +
460 nla_total_size(sizeof(u32));
461 struct net_bridge_group_src *ent;
462 size_t addr_size = 0;
467 /* MDBA_MDB_EATTR_RTPROT */
468 nlmsg_size += nla_total_size(sizeof(u8));
470 switch (pg->key.addr.proto) {
471 case htons(ETH_P_IP):
472 /* MDBA_MDB_EATTR_SOURCE */
473 if (pg->key.addr.src.ip4)
474 nlmsg_size += nla_total_size(sizeof(__be32));
475 if (pg->key.port->br->multicast_ctx.multicast_igmp_version == 2)
477 addr_size = sizeof(__be32);
479 #if IS_ENABLED(CONFIG_IPV6)
480 case htons(ETH_P_IPV6):
481 /* MDBA_MDB_EATTR_SOURCE */
482 if (!ipv6_addr_any(&pg->key.addr.src.ip6))
483 nlmsg_size += nla_total_size(sizeof(struct in6_addr));
484 if (pg->key.port->br->multicast_ctx.multicast_mld_version == 1)
486 addr_size = sizeof(struct in6_addr);
491 /* MDBA_MDB_EATTR_GROUP_MODE */
492 nlmsg_size += nla_total_size(sizeof(u8));
494 /* MDBA_MDB_EATTR_SRC_LIST nested attr */
495 if (!hlist_empty(&pg->src_list))
496 nlmsg_size += nla_total_size(0);
498 hlist_for_each_entry(ent, &pg->src_list, node) {
499 /* MDBA_MDB_SRCLIST_ENTRY nested attr +
500 * MDBA_MDB_SRCATTR_ADDRESS + MDBA_MDB_SRCATTR_TIMER
502 nlmsg_size += nla_total_size(0) +
503 nla_total_size(addr_size) +
504 nla_total_size(sizeof(u32));
510 void br_mdb_notify(struct net_device *dev,
511 struct net_bridge_mdb_entry *mp,
512 struct net_bridge_port_group *pg,
515 struct net *net = dev_net(dev);
519 br_switchdev_mdb_notify(dev, mp, pg, type);
521 skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC);
525 err = nlmsg_populate_mdb_fill(skb, dev, mp, pg, type);
531 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
534 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
537 static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
538 struct net_device *dev,
539 int ifindex, u16 vid, u32 pid,
540 u32 seq, int type, unsigned int flags)
542 struct nlattr *nest, *port_nest;
543 struct br_port_msg *bpm;
544 struct nlmsghdr *nlh;
546 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
550 bpm = nlmsg_data(nlh);
551 memset(bpm, 0, sizeof(*bpm));
552 bpm->family = AF_BRIDGE;
553 bpm->ifindex = dev->ifindex;
554 nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
558 port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
561 if (nla_put_nohdr(skb, sizeof(u32), &ifindex)) {
562 nla_nest_cancel(skb, port_nest);
565 if (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid)) {
566 nla_nest_cancel(skb, port_nest);
569 nla_nest_end(skb, port_nest);
571 nla_nest_end(skb, nest);
576 nla_nest_end(skb, nest);
578 nlmsg_cancel(skb, nlh);
582 static inline size_t rtnl_rtr_nlmsg_size(void)
584 return NLMSG_ALIGN(sizeof(struct br_port_msg))
585 + nla_total_size(sizeof(__u32))
586 + nla_total_size(sizeof(u16));
589 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
592 struct net *net = dev_net(dev);
598 ifindex = pmctx ? pmctx->port->dev->ifindex : 0;
599 vid = pmctx && br_multicast_port_ctx_is_vlan(pmctx) ? pmctx->vlan->vid :
601 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
605 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, vid, 0, 0, type,
612 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
616 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
619 static const struct nla_policy
620 br_mdbe_src_list_entry_pol[MDBE_SRCATTR_MAX + 1] = {
621 [MDBE_SRCATTR_ADDRESS] = NLA_POLICY_RANGE(NLA_BINARY,
622 sizeof(struct in_addr),
623 sizeof(struct in6_addr)),
626 static const struct nla_policy
627 br_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = {
628 [MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(br_mdbe_src_list_entry_pol),
631 static const struct nla_policy br_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = {
632 [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
633 sizeof(struct in_addr),
634 sizeof(struct in6_addr)),
635 [MDBE_ATTR_GROUP_MODE] = NLA_POLICY_RANGE(NLA_U8, MCAST_EXCLUDE,
637 [MDBE_ATTR_SRC_LIST] = NLA_POLICY_NESTED(br_mdbe_src_list_pol),
638 [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
641 static bool is_valid_mdb_source(struct nlattr *attr, __be16 proto,
642 struct netlink_ext_ack *extack)
645 case htons(ETH_P_IP):
646 if (nla_len(attr) != sizeof(struct in_addr)) {
647 NL_SET_ERR_MSG_MOD(extack, "IPv4 invalid source address length");
650 if (ipv4_is_multicast(nla_get_in_addr(attr))) {
651 NL_SET_ERR_MSG_MOD(extack, "IPv4 multicast source address is not allowed");
655 #if IS_ENABLED(CONFIG_IPV6)
656 case htons(ETH_P_IPV6): {
659 if (nla_len(attr) != sizeof(struct in6_addr)) {
660 NL_SET_ERR_MSG_MOD(extack, "IPv6 invalid source address length");
663 src = nla_get_in6_addr(attr);
664 if (ipv6_addr_is_multicast(&src)) {
665 NL_SET_ERR_MSG_MOD(extack, "IPv6 multicast source address is not allowed");
672 NL_SET_ERR_MSG_MOD(extack, "Invalid protocol used with source address");
679 static struct net_bridge_mcast *
680 __br_mdb_choose_context(struct net_bridge *br,
681 const struct br_mdb_entry *entry,
682 struct netlink_ext_ack *extack)
684 struct net_bridge_mcast *brmctx = NULL;
685 struct net_bridge_vlan *v;
687 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
688 brmctx = &br->multicast_ctx;
693 NL_SET_ERR_MSG_MOD(extack, "Cannot add an entry without a vlan when vlan snooping is enabled");
697 v = br_vlan_find(br_vlan_group(br), entry->vid);
699 NL_SET_ERR_MSG_MOD(extack, "Vlan is not configured");
702 if (br_multicast_ctx_vlan_global_disabled(&v->br_mcast_ctx)) {
703 NL_SET_ERR_MSG_MOD(extack, "Vlan's multicast processing is disabled");
706 brmctx = &v->br_mcast_ctx;
711 static int br_mdb_replace_group_sg(const struct br_mdb_config *cfg,
712 struct net_bridge_mdb_entry *mp,
713 struct net_bridge_port_group *pg,
714 struct net_bridge_mcast *brmctx,
717 unsigned long now = jiffies;
720 pg->rt_protocol = cfg->rt_protocol;
721 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
722 mod_timer(&pg->timer,
723 now + brmctx->multicast_membership_interval);
725 del_timer(&pg->timer);
727 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
732 static int br_mdb_add_group_sg(const struct br_mdb_config *cfg,
733 struct net_bridge_mdb_entry *mp,
734 struct net_bridge_mcast *brmctx,
736 struct netlink_ext_ack *extack)
738 struct net_bridge_port_group __rcu **pp;
739 struct net_bridge_port_group *p;
740 unsigned long now = jiffies;
742 for (pp = &mp->ports;
743 (p = mlock_dereference(*pp, cfg->br)) != NULL;
745 if (p->key.port == cfg->p) {
746 if (!(cfg->nlflags & NLM_F_REPLACE)) {
747 NL_SET_ERR_MSG_MOD(extack, "(S, G) group is already joined by port");
750 return br_mdb_replace_group_sg(cfg, mp, p, brmctx,
753 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
757 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
758 MCAST_INCLUDE, cfg->rt_protocol, extack);
762 rcu_assign_pointer(*pp, p);
763 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
765 now + brmctx->multicast_membership_interval);
766 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
768 /* All of (*, G) EXCLUDE ports need to be added to the new (S, G) for
769 * proper replication.
771 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto)) {
772 struct net_bridge_mdb_entry *star_mp;
773 struct br_ip star_group;
775 star_group = p->key.addr;
776 memset(&star_group.src, 0, sizeof(star_group.src));
777 star_mp = br_mdb_ip_get(cfg->br, &star_group);
779 br_multicast_sg_add_exclude_ports(star_mp, p);
785 static int br_mdb_add_group_src_fwd(const struct br_mdb_config *cfg,
786 struct br_ip *src_ip,
787 struct net_bridge_mcast *brmctx,
788 struct netlink_ext_ack *extack)
790 struct net_bridge_mdb_entry *sgmp;
791 struct br_mdb_config sg_cfg;
796 sg_ip.src = src_ip->src;
797 sgmp = br_multicast_new_group(cfg->br, &sg_ip);
799 NL_SET_ERR_MSG_MOD(extack, "Failed to add (S, G) MDB entry");
800 return PTR_ERR(sgmp);
803 if (cfg->entry->state == MDB_PERMANENT)
804 flags |= MDB_PG_FLAGS_PERMANENT;
805 if (cfg->filter_mode == MCAST_EXCLUDE)
806 flags |= MDB_PG_FLAGS_BLOCKED;
808 memset(&sg_cfg, 0, sizeof(sg_cfg));
811 sg_cfg.entry = cfg->entry;
812 sg_cfg.group = sg_ip;
813 sg_cfg.src_entry = true;
814 sg_cfg.filter_mode = MCAST_INCLUDE;
815 sg_cfg.rt_protocol = cfg->rt_protocol;
816 sg_cfg.nlflags = cfg->nlflags;
817 return br_mdb_add_group_sg(&sg_cfg, sgmp, brmctx, flags, extack);
820 static int br_mdb_add_group_src(const struct br_mdb_config *cfg,
821 struct net_bridge_port_group *pg,
822 struct net_bridge_mcast *brmctx,
823 struct br_mdb_src_entry *src,
824 struct netlink_ext_ack *extack)
826 struct net_bridge_group_src *ent;
827 unsigned long now = jiffies;
830 ent = br_multicast_find_group_src(pg, &src->addr);
832 ent = br_multicast_new_group_src(pg, &src->addr);
834 NL_SET_ERR_MSG_MOD(extack, "Failed to add new source entry");
837 } else if (!(cfg->nlflags & NLM_F_REPLACE)) {
838 NL_SET_ERR_MSG_MOD(extack, "Source entry already exists");
842 if (cfg->filter_mode == MCAST_INCLUDE &&
843 cfg->entry->state == MDB_TEMPORARY)
844 mod_timer(&ent->timer, now + br_multicast_gmi(brmctx));
846 del_timer(&ent->timer);
848 /* Install a (S, G) forwarding entry for the source. */
849 err = br_mdb_add_group_src_fwd(cfg, &src->addr, brmctx, extack);
853 ent->flags = BR_SGRP_F_INSTALLED | BR_SGRP_F_USER_ADDED;
858 __br_multicast_del_group_src(ent);
862 static void br_mdb_del_group_src(struct net_bridge_port_group *pg,
863 struct br_mdb_src_entry *src)
865 struct net_bridge_group_src *ent;
867 ent = br_multicast_find_group_src(pg, &src->addr);
868 if (WARN_ON_ONCE(!ent))
870 br_multicast_del_group_src(ent, false);
873 static int br_mdb_add_group_srcs(const struct br_mdb_config *cfg,
874 struct net_bridge_port_group *pg,
875 struct net_bridge_mcast *brmctx,
876 struct netlink_ext_ack *extack)
880 for (i = 0; i < cfg->num_src_entries; i++) {
881 err = br_mdb_add_group_src(cfg, pg, brmctx,
882 &cfg->src_entries[i], extack);
884 goto err_del_group_srcs;
890 for (i--; i >= 0; i--)
891 br_mdb_del_group_src(pg, &cfg->src_entries[i]);
895 static int br_mdb_replace_group_srcs(const struct br_mdb_config *cfg,
896 struct net_bridge_port_group *pg,
897 struct net_bridge_mcast *brmctx,
898 struct netlink_ext_ack *extack)
900 struct net_bridge_group_src *ent;
901 struct hlist_node *tmp;
904 hlist_for_each_entry(ent, &pg->src_list, node)
905 ent->flags |= BR_SGRP_F_DELETE;
907 err = br_mdb_add_group_srcs(cfg, pg, brmctx, extack);
909 goto err_clear_delete;
911 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) {
912 if (ent->flags & BR_SGRP_F_DELETE)
913 br_multicast_del_group_src(ent, false);
919 hlist_for_each_entry(ent, &pg->src_list, node)
920 ent->flags &= ~BR_SGRP_F_DELETE;
924 static int br_mdb_replace_group_star_g(const struct br_mdb_config *cfg,
925 struct net_bridge_mdb_entry *mp,
926 struct net_bridge_port_group *pg,
927 struct net_bridge_mcast *brmctx,
929 struct netlink_ext_ack *extack)
931 unsigned long now = jiffies;
934 err = br_mdb_replace_group_srcs(cfg, pg, brmctx, extack);
939 pg->filter_mode = cfg->filter_mode;
940 pg->rt_protocol = cfg->rt_protocol;
941 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
942 cfg->filter_mode == MCAST_EXCLUDE)
943 mod_timer(&pg->timer,
944 now + brmctx->multicast_membership_interval);
946 del_timer(&pg->timer);
948 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
950 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto))
951 br_multicast_star_g_handle_mode(pg, cfg->filter_mode);
956 static int br_mdb_add_group_star_g(const struct br_mdb_config *cfg,
957 struct net_bridge_mdb_entry *mp,
958 struct net_bridge_mcast *brmctx,
960 struct netlink_ext_ack *extack)
962 struct net_bridge_port_group __rcu **pp;
963 struct net_bridge_port_group *p;
964 unsigned long now = jiffies;
967 for (pp = &mp->ports;
968 (p = mlock_dereference(*pp, cfg->br)) != NULL;
970 if (p->key.port == cfg->p) {
971 if (!(cfg->nlflags & NLM_F_REPLACE)) {
972 NL_SET_ERR_MSG_MOD(extack, "(*, G) group is already joined by port");
975 return br_mdb_replace_group_star_g(cfg, mp, p, brmctx,
978 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
982 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
983 cfg->filter_mode, cfg->rt_protocol,
988 err = br_mdb_add_group_srcs(cfg, p, brmctx, extack);
990 goto err_del_port_group;
992 rcu_assign_pointer(*pp, p);
993 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
994 cfg->filter_mode == MCAST_EXCLUDE)
996 now + brmctx->multicast_membership_interval);
997 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
998 /* If we are adding a new EXCLUDE port group (*, G), it needs to be
999 * also added to all (S, G) entries for proper replication.
1001 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto) &&
1002 cfg->filter_mode == MCAST_EXCLUDE)
1003 br_multicast_star_g_handle_mode(p, MCAST_EXCLUDE);
1008 br_multicast_del_port_group(p);
1012 static int br_mdb_add_group(const struct br_mdb_config *cfg,
1013 struct netlink_ext_ack *extack)
1015 struct br_mdb_entry *entry = cfg->entry;
1016 struct net_bridge_port *port = cfg->p;
1017 struct net_bridge_mdb_entry *mp;
1018 struct net_bridge *br = cfg->br;
1019 struct net_bridge_mcast *brmctx;
1020 struct br_ip group = cfg->group;
1021 unsigned char flags = 0;
1023 brmctx = __br_mdb_choose_context(br, entry, extack);
1027 mp = br_multicast_new_group(br, &group);
1033 if (mp->host_joined) {
1034 NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
1038 br_multicast_host_join(brmctx, mp, false);
1039 br_mdb_notify(br->dev, mp, NULL, RTM_NEWMDB);
1044 if (entry->state == MDB_PERMANENT)
1045 flags |= MDB_PG_FLAGS_PERMANENT;
1047 if (br_multicast_is_star_g(&group))
1048 return br_mdb_add_group_star_g(cfg, mp, brmctx, flags, extack);
1050 return br_mdb_add_group_sg(cfg, mp, brmctx, flags, extack);
1053 static int __br_mdb_add(const struct br_mdb_config *cfg,
1054 struct netlink_ext_ack *extack)
1058 spin_lock_bh(&cfg->br->multicast_lock);
1059 ret = br_mdb_add_group(cfg, extack);
1060 spin_unlock_bh(&cfg->br->multicast_lock);
1065 static int br_mdb_config_src_entry_init(struct nlattr *src_entry,
1066 struct br_mdb_src_entry *src,
1068 struct netlink_ext_ack *extack)
1070 struct nlattr *tb[MDBE_SRCATTR_MAX + 1];
1073 err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry,
1074 br_mdbe_src_list_entry_pol, extack);
1078 if (NL_REQ_ATTR_CHECK(extack, src_entry, tb, MDBE_SRCATTR_ADDRESS))
1081 if (!is_valid_mdb_source(tb[MDBE_SRCATTR_ADDRESS], proto, extack))
1084 src->addr.proto = proto;
1085 nla_memcpy(&src->addr.src, tb[MDBE_SRCATTR_ADDRESS],
1086 nla_len(tb[MDBE_SRCATTR_ADDRESS]));
1091 static int br_mdb_config_src_list_init(struct nlattr *src_list,
1092 struct br_mdb_config *cfg,
1093 struct netlink_ext_ack *extack)
1095 struct nlattr *src_entry;
1099 nla_for_each_nested(src_entry, src_list, rem)
1100 cfg->num_src_entries++;
1102 if (cfg->num_src_entries >= PG_SRC_ENT_LIMIT) {
1103 NL_SET_ERR_MSG_FMT_MOD(extack, "Exceeded maximum number of source entries (%u)",
1104 PG_SRC_ENT_LIMIT - 1);
1108 cfg->src_entries = kcalloc(cfg->num_src_entries,
1109 sizeof(struct br_mdb_src_entry), GFP_KERNEL);
1110 if (!cfg->src_entries)
1113 nla_for_each_nested(src_entry, src_list, rem) {
1114 err = br_mdb_config_src_entry_init(src_entry,
1115 &cfg->src_entries[i],
1116 cfg->entry->addr.proto,
1119 goto err_src_entry_init;
1126 kfree(cfg->src_entries);
1130 static void br_mdb_config_src_list_fini(struct br_mdb_config *cfg)
1132 kfree(cfg->src_entries);
1135 static int br_mdb_config_attrs_init(struct nlattr *set_attrs,
1136 struct br_mdb_config *cfg,
1137 struct netlink_ext_ack *extack)
1139 struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1];
1142 err = nla_parse_nested(mdb_attrs, MDBE_ATTR_MAX, set_attrs,
1143 br_mdbe_attrs_pol, extack);
1147 if (mdb_attrs[MDBE_ATTR_SOURCE] &&
1148 !is_valid_mdb_source(mdb_attrs[MDBE_ATTR_SOURCE],
1149 cfg->entry->addr.proto, extack))
1152 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, mdb_attrs);
1154 if (mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1156 NL_SET_ERR_MSG_MOD(extack, "Filter mode cannot be set for host groups");
1159 if (!br_multicast_is_star_g(&cfg->group)) {
1160 NL_SET_ERR_MSG_MOD(extack, "Filter mode can only be set for (*, G) entries");
1163 cfg->filter_mode = nla_get_u8(mdb_attrs[MDBE_ATTR_GROUP_MODE]);
1165 cfg->filter_mode = MCAST_EXCLUDE;
1168 if (mdb_attrs[MDBE_ATTR_SRC_LIST]) {
1170 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set for host groups");
1173 if (!br_multicast_is_star_g(&cfg->group)) {
1174 NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries");
1177 if (!mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1178 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode");
1181 err = br_mdb_config_src_list_init(mdb_attrs[MDBE_ATTR_SRC_LIST],
1187 if (!cfg->num_src_entries && cfg->filter_mode == MCAST_INCLUDE) {
1188 NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list");
1192 if (mdb_attrs[MDBE_ATTR_RTPROT]) {
1194 NL_SET_ERR_MSG_MOD(extack, "Protocol cannot be set for host groups");
1197 cfg->rt_protocol = nla_get_u8(mdb_attrs[MDBE_ATTR_RTPROT]);
1203 static int br_mdb_config_init(struct br_mdb_config *cfg, struct net_device *dev,
1204 struct nlattr *tb[], u16 nlmsg_flags,
1205 struct netlink_ext_ack *extack)
1207 struct net *net = dev_net(dev);
1209 memset(cfg, 0, sizeof(*cfg));
1210 cfg->filter_mode = MCAST_EXCLUDE;
1211 cfg->rt_protocol = RTPROT_STATIC;
1212 cfg->nlflags = nlmsg_flags;
1214 cfg->br = netdev_priv(dev);
1216 if (!netif_running(cfg->br->dev)) {
1217 NL_SET_ERR_MSG_MOD(extack, "Bridge device is not running");
1221 if (!br_opt_get(cfg->br, BROPT_MULTICAST_ENABLED)) {
1222 NL_SET_ERR_MSG_MOD(extack, "Bridge's multicast processing is disabled");
1226 cfg->entry = nla_data(tb[MDBA_SET_ENTRY]);
1228 if (cfg->entry->ifindex != cfg->br->dev->ifindex) {
1229 struct net_device *pdev;
1231 pdev = __dev_get_by_index(net, cfg->entry->ifindex);
1233 NL_SET_ERR_MSG_MOD(extack, "Port net device doesn't exist");
1237 cfg->p = br_port_get_rtnl(pdev);
1239 NL_SET_ERR_MSG_MOD(extack, "Net device is not a bridge port");
1243 if (cfg->p->br != cfg->br) {
1244 NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device");
1249 if (cfg->entry->addr.proto == htons(ETH_P_IP) &&
1250 ipv4_is_zeronet(cfg->entry->addr.u.ip4)) {
1251 NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address 0.0.0.0 is not allowed");
1255 if (tb[MDBA_SET_ENTRY_ATTRS])
1256 return br_mdb_config_attrs_init(tb[MDBA_SET_ENTRY_ATTRS], cfg,
1259 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, NULL);
1264 static void br_mdb_config_fini(struct br_mdb_config *cfg)
1266 br_mdb_config_src_list_fini(cfg);
1269 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1270 struct netlink_ext_ack *extack)
1272 struct net_bridge_vlan_group *vg;
1273 struct net_bridge_vlan *v;
1274 struct br_mdb_config cfg;
1277 err = br_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack);
1282 /* host join errors which can happen before creating the group */
1283 if (!cfg.p && !br_group_is_l2(&cfg.group)) {
1284 /* don't allow any flags for host-joined IP groups */
1285 if (cfg.entry->state) {
1286 NL_SET_ERR_MSG_MOD(extack, "Flags are not allowed for host groups");
1289 if (!br_multicast_is_star_g(&cfg.group)) {
1290 NL_SET_ERR_MSG_MOD(extack, "Groups with sources cannot be manually host joined");
1295 if (br_group_is_l2(&cfg.group) && cfg.entry->state != MDB_PERMANENT) {
1296 NL_SET_ERR_MSG_MOD(extack, "Only permanent L2 entries allowed");
1301 if (cfg.p->state == BR_STATE_DISABLED && cfg.entry->state != MDB_PERMANENT) {
1302 NL_SET_ERR_MSG_MOD(extack, "Port is in disabled state and entry is not permanent");
1305 vg = nbp_vlan_group(cfg.p);
1307 vg = br_vlan_group(cfg.br);
1310 /* If vlan filtering is enabled and VLAN is not specified
1311 * install mdb entry on all vlans configured on the port.
1313 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
1314 list_for_each_entry(v, &vg->vlan_list, vlist) {
1315 cfg.entry->vid = v->vid;
1316 cfg.group.vid = v->vid;
1317 err = __br_mdb_add(&cfg, extack);
1322 err = __br_mdb_add(&cfg, extack);
1326 br_mdb_config_fini(&cfg);
1330 static int __br_mdb_del(const struct br_mdb_config *cfg)
1332 struct br_mdb_entry *entry = cfg->entry;
1333 struct net_bridge *br = cfg->br;
1334 struct net_bridge_mdb_entry *mp;
1335 struct net_bridge_port_group *p;
1336 struct net_bridge_port_group __rcu **pp;
1337 struct br_ip ip = cfg->group;
1340 spin_lock_bh(&br->multicast_lock);
1341 mp = br_mdb_ip_get(br, &ip);
1346 if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) {
1347 br_multicast_host_leave(mp, false);
1349 br_mdb_notify(br->dev, mp, NULL, RTM_DELMDB);
1350 if (!mp->ports && netif_running(br->dev))
1351 mod_timer(&mp->timer, jiffies);
1355 for (pp = &mp->ports;
1356 (p = mlock_dereference(*pp, br)) != NULL;
1358 if (!p->key.port || p->key.port->dev->ifindex != entry->ifindex)
1361 br_multicast_del_pg(mp, p, pp);
1367 spin_unlock_bh(&br->multicast_lock);
1371 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1372 struct netlink_ext_ack *extack)
1374 struct net_bridge_vlan_group *vg;
1375 struct net_bridge_vlan *v;
1376 struct br_mdb_config cfg;
1379 err = br_mdb_config_init(&cfg, dev, tb, 0, extack);
1384 vg = nbp_vlan_group(cfg.p);
1386 vg = br_vlan_group(cfg.br);
1388 /* If vlan filtering is enabled and VLAN is not specified
1389 * delete mdb entry on all vlans configured on the port.
1391 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
1392 list_for_each_entry(v, &vg->vlan_list, vlist) {
1393 cfg.entry->vid = v->vid;
1394 cfg.group.vid = v->vid;
1395 err = __br_mdb_del(&cfg);
1398 err = __br_mdb_del(&cfg);
1401 br_mdb_config_fini(&cfg);