1 // SPDX-License-Identifier: GPL-2.0
54 #include "hard-interface.h"
59 #include "soft-interface.h"
60 #include "translation-table.h"
66  * batadv_mcast_start_timer() - schedule the multicast periodic worker
67  * @bat_priv: the bat priv with all the soft interface information
71 	queue_delayed_work(batadv_event_workqueue, &bat_priv->mcast.work,  in batadv_mcast_start_timer()
76  * batadv_mcast_get_bridge() - get the bridge on top of the softif if it exists
77  * @soft_iface: netdev struct of the mesh interface
79  * If the given soft interface has a bridge on top then the refcount
92 	} while (upper && !(upper->priv_flags & IFF_EBRIDGE));  in batadv_mcast_get_bridge()
101  * batadv_mcast_mla_rtr_flags_softif_get_ipv4() - get mcast router flags from
102  *  node for IPv4
103  * @dev: the interface to check
105  * Checks the presence of an IPv4 multicast router on this node.
122  * batadv_mcast_mla_rtr_flags_softif_get_ipv6() - get mcast router flags from
123  *  node for IPv6
124  * @dev: the interface to check
126  * Checks the presence of an IPv6 multicast router on this node.
137 	if (in6_dev && in6_dev->cnf.mc_forwarding)  in batadv_mcast_mla_rtr_flags_softif_get_ipv6()
151  * batadv_mcast_mla_rtr_flags_softif_get() - get mcast router flags from node
152  * @bat_priv: the bat priv with all the soft interface information
153  * @bridge: bridge interface on top of the soft_iface if present,
157  * node.
168 	struct net_device *dev = bridge ? bridge : bat_priv->soft_iface;  in batadv_mcast_mla_rtr_flags_softif_get()
182  * batadv_mcast_mla_rtr_flags_bridge_get() - get mcast router flags from bridge
183  * @bat_priv: the bat priv with all the soft interface information
184  * @bridge: bridge interface on top of the soft_iface if present,
198 	struct net_device *dev = bat_priv->soft_iface;  in batadv_mcast_mla_rtr_flags_bridge_get()
213  * batadv_mcast_mla_rtr_flags_get() - get multicast router flags
214  * @bat_priv: the bat priv with all the soft interface information
215  * @bridge: bridge interface on top of the soft_iface if present,
219  * node or behind its bridge.
239  * batadv_mcast_mla_flags_get() - get the new multicast flags
240  * @bat_priv: the bat priv with all the soft interface information
248 	struct net_device *dev = bat_priv->soft_iface;  in batadv_mcast_mla_flags_get()
270 		pr_warn_once("No bridge IGMP snooping compiled - multicast optimizations disabled\n");  in batadv_mcast_mla_flags_get()
272 	qr4->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IP);  in batadv_mcast_mla_flags_get()
273 	qr4->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IP);  in batadv_mcast_mla_flags_get()
275 	qr6->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IPV6);  in batadv_mcast_mla_flags_get()
276 	qr6->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IPV6);  in batadv_mcast_mla_flags_get()
289 	if (!qr4->exists || qr4->shadowing) {  in batadv_mcast_mla_flags_get()
294 	if (!qr6->exists || qr6->shadowing) {  in batadv_mcast_mla_flags_get()
303  * batadv_mcast_mla_is_duplicate() - check whether an address is in a list
316 		if (batadv_compare_eth(mcast_entry->addr, mcast_addr))  in batadv_mcast_mla_is_duplicate()
323  * batadv_mcast_mla_softif_get_ipv4() - get softif IPv4 multicast listeners
329  * on this kernel on the given soft interface, dev, in
331  * your multicast receiving applications run directly on this node.
333  * Return: -ENOMEM on memory allocation error or the number of
347 	if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV4)  in batadv_mcast_mla_softif_get_ipv4()
358 	for (pmc = rcu_dereference(in_dev->mc_list); pmc;  in batadv_mcast_mla_softif_get_ipv4()
359 	     pmc = rcu_dereference(pmc->next_rcu)) {  in batadv_mcast_mla_softif_get_ipv4()
360 		if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&  in batadv_mcast_mla_softif_get_ipv4()
361 		    ipv4_is_local_multicast(pmc->multiaddr))  in batadv_mcast_mla_softif_get_ipv4()
364 		if (!(flags->tvlv_flags & BATADV_MCAST_WANT_NO_RTR4) &&  in batadv_mcast_mla_softif_get_ipv4()
365 		    !ipv4_is_local_multicast(pmc->multiaddr))  in batadv_mcast_mla_softif_get_ipv4()
368 		ip_eth_mc_map(pmc->multiaddr, mcast_addr);  in batadv_mcast_mla_softif_get_ipv4()
375 			ret = -ENOMEM;  in batadv_mcast_mla_softif_get_ipv4()
379 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_softif_get_ipv4()
380 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_softif_get_ipv4()
389  * batadv_mcast_mla_softif_get_ipv6() - get softif IPv6 multicast listeners
395  * on this kernel on the given soft interface, dev, in
397  * your multicast receiving applications run directly on this node.
399  * Return: -ENOMEM on memory allocation error or the number of
414 	if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV6)  in batadv_mcast_mla_softif_get_ipv6()
425 	for (pmc6 = rcu_dereference(in6_dev->mc_list);  in batadv_mcast_mla_softif_get_ipv6()
427 	     pmc6 = rcu_dereference(pmc6->next)) {  in batadv_mcast_mla_softif_get_ipv6()
428 		if (IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) <  in batadv_mcast_mla_softif_get_ipv6()
432 		if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&  in batadv_mcast_mla_softif_get_ipv6()
433 		    ipv6_addr_is_ll_all_nodes(&pmc6->mca_addr))  in batadv_mcast_mla_softif_get_ipv6()
436 		if (!(flags->tvlv_flags & BATADV_MCAST_WANT_NO_RTR6) &&  in batadv_mcast_mla_softif_get_ipv6()
437 		    IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) >  in batadv_mcast_mla_softif_get_ipv6()
441 		ipv6_eth_mc_map(&pmc6->mca_addr, mcast_addr);  in batadv_mcast_mla_softif_get_ipv6()
448 			ret = -ENOMEM;  in batadv_mcast_mla_softif_get_ipv6()
452 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_softif_get_ipv6()
453 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_softif_get_ipv6()
471  * batadv_mcast_mla_softif_get() - get softif multicast listeners
477  * on this kernel on the given soft interface, dev, in
479  * your multicast receiving applications run directly on this node.
481  * If there is a bridge interface on top of dev, collect from that one
483  * will(/should) register to the bridge interface instead of an
486  * Return: -ENOMEM on memory allocation error or the number of
517  * batadv_mcast_mla_br_addr_cpy() - copy a bridge multicast address
518  * @dst: destination to write to - a multicast MAC address
519  * @src: source to read from - a multicast IP address
530 	if (src->proto == htons(ETH_P_IP))  in batadv_mcast_mla_br_addr_cpy()
531 		ip_eth_mc_map(src->dst.ip4, dst);  in batadv_mcast_mla_br_addr_cpy()
533 	else if (src->proto == htons(ETH_P_IPV6))  in batadv_mcast_mla_br_addr_cpy()
534 		ipv6_eth_mc_map(&src->dst.ip6, dst);  in batadv_mcast_mla_br_addr_cpy()
541  * batadv_mcast_mla_bridge_get() - get bridged-in multicast listeners
547  * on foreign, non-mesh devices which we gave access to our mesh via
548  * a bridge on top of the given soft interface, dev, in the given
551  * Return: -ENOMEM on memory allocation error or the number of
560 	u8 tvlv_flags = flags->tvlv_flags;  in batadv_mcast_mla_bridge_get()
573 		if (br_ip_entry->addr.proto == htons(ETH_P_IP)) {  in batadv_mcast_mla_bridge_get()
578 			    ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))  in batadv_mcast_mla_bridge_get()
582 			    !ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))  in batadv_mcast_mla_bridge_get()
587 		if (br_ip_entry->addr.proto == htons(ETH_P_IPV6)) {  in batadv_mcast_mla_bridge_get()
592 			    ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.dst.ip6))  in batadv_mcast_mla_bridge_get()
596 			    IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.dst.ip6) >  in batadv_mcast_mla_bridge_get()
602 		batadv_mcast_mla_br_addr_cpy(mcast_addr, &br_ip_entry->addr);  in batadv_mcast_mla_bridge_get()
608 			ret = -ENOMEM;  in batadv_mcast_mla_bridge_get()
612 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_bridge_get()
613 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_bridge_get()
618 		list_del(&br_ip_entry->list);  in batadv_mcast_mla_bridge_get()
626  * batadv_mcast_mla_list_free() - free a list of multicast addresses
637 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_list_free()
643  * batadv_mcast_mla_tt_retract() - clean up multicast listener announcements
644  * @bat_priv: the bat priv with all the soft interface information
658 	hlist_for_each_entry_safe(mcast_entry, tmp, &bat_priv->mcast.mla_list,  in batadv_mcast_mla_tt_retract()
661 		    batadv_mcast_mla_is_duplicate(mcast_entry->addr,  in batadv_mcast_mla_tt_retract()
665 		batadv_tt_local_remove(bat_priv, mcast_entry->addr,  in batadv_mcast_mla_tt_retract()
669 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_tt_retract()
675  * batadv_mcast_mla_tt_add() - add multicast listener announcements
676  * @bat_priv: the bat priv with all the soft interface information
692 		if (batadv_mcast_mla_is_duplicate(mcast_entry->addr,  in batadv_mcast_mla_tt_add()
693 						  &bat_priv->mcast.mla_list))  in batadv_mcast_mla_tt_add()
696 		if (!batadv_tt_local_add(bat_priv->soft_iface,  in batadv_mcast_mla_tt_add()
697 					 mcast_entry->addr, BATADV_NO_FLAGS,  in batadv_mcast_mla_tt_add()
701 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_tt_add()
702 		hlist_add_head(&mcast_entry->list, &bat_priv->mcast.mla_list);  in batadv_mcast_mla_tt_add()
707  * batadv_mcast_querier_log() - debug output regarding the querier status on
709  * @bat_priv: the bat priv with all the soft interface information
721  * forward listener reports to the querier, therefore batman-adv and
722  * the bridge will potentially not see these listeners - the querier is
726  * soft interface.
733 	if (!old_state->exists && new_state->exists)  in batadv_mcast_querier_log()
734 		batadv_info(bat_priv->soft_iface, "%s Querier appeared\n",  in batadv_mcast_querier_log()
736 	else if (old_state->exists && !new_state->exists)  in batadv_mcast_querier_log()
737 		batadv_info(bat_priv->soft_iface,  in batadv_mcast_querier_log()
738 			    "%s Querier disappeared - multicast optimizations disabled\n",  in batadv_mcast_querier_log()
740 	else if (!bat_priv->mcast.mla_flags.bridged && !new_state->exists)  in batadv_mcast_querier_log()
741 		batadv_info(bat_priv->soft_iface,  in batadv_mcast_querier_log()
742 			    "No %s Querier present - multicast optimizations disabled\n",  in batadv_mcast_querier_log()
745 	if (new_state->exists) {  in batadv_mcast_querier_log()
746 		if ((!old_state->shadowing && new_state->shadowing) ||  in batadv_mcast_querier_log()
747 		    (!old_state->exists && new_state->shadowing))  in batadv_mcast_querier_log()
751 		else if (old_state->shadowing && !new_state->shadowing)  in batadv_mcast_querier_log()
759  * batadv_mcast_bridge_log() - debug output for topology changes in bridged
761  * @bat_priv: the bat priv with all the soft interface information
764  * If no bridges are ever used on this node, then this function does nothing.
769  * More precisely, it outputs information when a bridge interface is added or
770  * removed from a soft interface. And when a bridge is present, it further
772  * multicast flags this node is going to set.
778 	struct batadv_mcast_mla_flags *old_flags = &bat_priv->mcast.mla_flags;  in batadv_mcast_bridge_log()
780 	if (!old_flags->bridged && new_flags->bridged)  in batadv_mcast_bridge_log()
782 			   "Bridge added: Setting Unsnoopables(U)-flag\n");  in batadv_mcast_bridge_log()
783 	else if (old_flags->bridged && !new_flags->bridged)  in batadv_mcast_bridge_log()
785 			   "Bridge removed: Unsetting Unsnoopables(U)-flag\n");  in batadv_mcast_bridge_log()
787 	if (new_flags->bridged) {  in batadv_mcast_bridge_log()
789 					 &old_flags->querier_ipv4,  in batadv_mcast_bridge_log()
790 					 &new_flags->querier_ipv4);  in batadv_mcast_bridge_log()
792 					 &old_flags->querier_ipv6,  in batadv_mcast_bridge_log()
793 					 &new_flags->querier_ipv6);  in batadv_mcast_bridge_log()
798  * batadv_mcast_flags_log() - output debug information about mcast flag changes
799  * @bat_priv: the bat priv with all the soft interface information
802  * Whenever the multicast TVLV flags this node announces change, this function
807 	bool old_enabled = bat_priv->mcast.mla_flags.enabled;  in batadv_mcast_flags_log()
808 	u8 old_flags = bat_priv->mcast.mla_flags.tvlv_flags;  in batadv_mcast_flags_log()
829  * batadv_mcast_mla_flags_update() - update multicast flags
830  * @bat_priv: the bat priv with all the soft interface information
842 	if (!memcmp(flags, &bat_priv->mcast.mla_flags, sizeof(*flags)))  in batadv_mcast_mla_flags_update()
846 	batadv_mcast_flags_log(bat_priv, flags->tvlv_flags);  in batadv_mcast_mla_flags_update()
848 	mcast_data.flags = flags->tvlv_flags;  in batadv_mcast_mla_flags_update()
854 	bat_priv->mcast.mla_flags = *flags;  in batadv_mcast_mla_flags_update()
858  * __batadv_mcast_mla_update() - update the own MLAs
859  * @bat_priv: the bat priv with all the soft interface information
864  * Note that non-conflicting reads and writes to bat_priv->mcast.mla_list
866  * ensured by the non-parallel execution of the worker this function
871 	struct net_device *soft_iface = bat_priv->soft_iface;  in __batadv_mcast_mla_update()
886 	spin_lock(&bat_priv->mcast.mla_lock);  in __batadv_mcast_mla_update()
890 	spin_unlock(&bat_priv->mcast.mla_lock);  in __batadv_mcast_mla_update()
897  * batadv_mcast_mla_update() - update the own MLAs
920  * batadv_mcast_is_report_ipv4() - check for IGMP reports
934 	switch (igmp_hdr(skb)->type) {  in batadv_mcast_is_report_ipv4()
945  * batadv_mcast_forw_mode_check_ipv4() - check for optimized forwarding
947  * @bat_priv: the bat priv with all the soft interface information
955  * Return: If so then 0. Otherwise -EINVAL or -ENOMEM in case of memory
965 	/* We might fail due to out-of-memory -> drop it */  in batadv_mcast_forw_mode_check_ipv4()
967 		return -ENOMEM;  in batadv_mcast_forw_mode_check_ipv4()
970 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv4()
974 	/* link-local multicast listeners behind a bridge are  in batadv_mcast_forw_mode_check_ipv4()
977 	if (ipv4_is_local_multicast(iphdr->daddr))  in batadv_mcast_forw_mode_check_ipv4()
986  * batadv_mcast_is_report_ipv6() - check for MLD reports
1000 	switch (icmp6_hdr(skb)->icmp6_type) {  in batadv_mcast_is_report_ipv6()
1010  * batadv_mcast_forw_mode_check_ipv6() - check for optimized forwarding
1012  * @bat_priv: the bat priv with all the soft interface information
1020  * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory
1029 	/* We might fail due to out-of-memory -> drop it */  in batadv_mcast_forw_mode_check_ipv6()
1031 		return -ENOMEM;  in batadv_mcast_forw_mode_check_ipv6()
1034 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv6()
1038 	if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) < IPV6_ADDR_SCOPE_LINKLOCAL)  in batadv_mcast_forw_mode_check_ipv6()
1039 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv6()
1041 	/* link-local-all-nodes multicast listeners behind a bridge are  in batadv_mcast_forw_mode_check_ipv6()
1044 	if (ipv6_addr_is_ll_all_nodes(&ip6hdr->daddr))  in batadv_mcast_forw_mode_check_ipv6()
1046 	else if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) > IPV6_ADDR_SCOPE_LINKLOCAL)  in batadv_mcast_forw_mode_check_ipv6()
1053  * batadv_mcast_forw_mode_check() - check for optimized forwarding potential
1054  * @bat_priv: the bat priv with all the soft interface information
1062  * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory
1071 	if (!atomic_read(&bat_priv->multicast_mode))  in batadv_mcast_forw_mode_check()
1072 		return -EINVAL;  in batadv_mcast_forw_mode_check()
1074 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_mode_check()
1081 			return -EINVAL;  in batadv_mcast_forw_mode_check()
1087 		return -EINVAL;  in batadv_mcast_forw_mode_check()
1092  * batadv_mcast_forw_want_all_ip_count() - count nodes with unspecific mcast
1094  * @bat_priv: the bat priv with all the soft interface information
1104 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_want_all_ip_count()
1106 		return atomic_read(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_forw_want_all_ip_count()
1108 		return atomic_read(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_forw_want_all_ip_count()
1116  * batadv_mcast_forw_rtr_count() - count nodes with a multicast router
1117  * @bat_priv: the bat priv with all the soft interface information
1130 		return atomic_read(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_forw_rtr_count()
1132 		return atomic_read(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_forw_rtr_count()
1139  * batadv_mcast_forw_tt_node_get() - get a multicast tt node
1140  * @bat_priv: the bat priv with all the soft interface information
1150 	return batadv_transtable_search(bat_priv, NULL, ethhdr->h_dest,  in batadv_mcast_forw_tt_node_get()
1155  * batadv_mcast_forw_ipv4_node_get() - get a node with an ipv4 flag
1156  * @bat_priv: the bat priv with all the soft interface information
1168 				 &bat_priv->mcast.want_all_ipv4_list,  in batadv_mcast_forw_ipv4_node_get()
1170 		if (!kref_get_unless_zero(&tmp_orig_node->refcount))  in batadv_mcast_forw_ipv4_node_get()
1182  * batadv_mcast_forw_ipv6_node_get() - get a node with an ipv6 flag
1183  * @bat_priv: the bat priv with all the soft interface information
1195 				 &bat_priv->mcast.want_all_ipv6_list,  in batadv_mcast_forw_ipv6_node_get()
1197 		if (!kref_get_unless_zero(&tmp_orig_node->refcount))  in batadv_mcast_forw_ipv6_node_get()
1209  * batadv_mcast_forw_ip_node_get() - get a node with an ipv4/ipv6 flag
1210  * @bat_priv: the bat priv with all the soft interface information
1221 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_ip_node_get()
1233  * batadv_mcast_forw_unsnoop_node_get() - get a node with an unsnoopable flag
1234  * @bat_priv: the bat priv with all the soft interface information
1246 				 &bat_priv->mcast.want_all_unsnoopables_list,  in batadv_mcast_forw_unsnoop_node_get()
1248 		if (!kref_get_unless_zero(&tmp_orig_node->refcount))  in batadv_mcast_forw_unsnoop_node_get()
1260  * batadv_mcast_forw_rtr4_node_get() - get a node with an ipv4 mcast router flag
1261  * @bat_priv: the bat priv with all the soft interface information
1273 				 &bat_priv->mcast.want_all_rtr4_list,  in batadv_mcast_forw_rtr4_node_get()
1275 		if (!kref_get_unless_zero(&tmp_orig_node->refcount))  in batadv_mcast_forw_rtr4_node_get()
1287  * batadv_mcast_forw_rtr6_node_get() - get a node with an ipv6 mcast router flag
1288  * @bat_priv: the bat priv with all the soft interface information
1300 				 &bat_priv->mcast.want_all_rtr6_list,  in batadv_mcast_forw_rtr6_node_get()
1302 		if (!kref_get_unless_zero(&tmp_orig_node->refcount))  in batadv_mcast_forw_rtr6_node_get()
1314  * batadv_mcast_forw_rtr_node_get() - get a node with an ipv4/ipv6 router flag
1315  * @bat_priv: the bat priv with all the soft interface information
1326 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_rtr_node_get()
1338  * batadv_mcast_forw_mode() - check on how to forward a multicast packet
1339  * @bat_priv: the bat priv with all the soft interface information
1360 	if (ret == -ENOMEM)  in batadv_mcast_forw_mode()
1367 	tt_count = batadv_tt_global_hash_count(bat_priv, ethhdr->h_dest,  in batadv_mcast_forw_mode()
1371 			atomic_read(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_forw_mode()
1395 		mcast_fanout = atomic_read(&bat_priv->multicast_fanout);  in batadv_mcast_forw_mode()
1405  * batadv_mcast_forw_send_orig() - send a multicast packet to an originator
1406  * @bat_priv: the bat priv with all the soft interface information
1418 	/* Avoid sending multicast-in-unicast packets to other BLA  in batadv_mcast_forw_send_orig()
1419 	 * gateways - they already got the frame from the LAN side  in batadv_mcast_forw_send_orig()
1424 	if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) {  in batadv_mcast_forw_send_orig()
1434  * batadv_mcast_forw_tt() - forwards a packet to multicast listeners
1435  * @bat_priv: the bat priv with all the soft interface information
1441  * via a batman-adv unicast packet for each such destination node.
1456 	const u8 *addr = eth_hdr(skb)->h_dest;  in batadv_mcast_forw_tt()
1463 	hlist_for_each_entry_rcu(orig_entry, &tt_global->orig_list, list) {  in batadv_mcast_forw_tt()
1471 					    orig_entry->orig_node);  in batadv_mcast_forw_tt()
1482  * batadv_mcast_forw_want_all_ipv4() - forward to nodes with want-all-ipv4
1483  * @bat_priv: the bat priv with all the soft interface information
1487  * Sends copies of a frame with multicast destination to any node with a
1489  * batman-adv unicast packet for each such destination node.
1504 				 &bat_priv->mcast.want_all_ipv4_list,  in batadv_mcast_forw_want_all_ipv4()
1519  * batadv_mcast_forw_want_all_ipv6() - forward to nodes with want-all-ipv6
1520  * @bat_priv: the bat priv with all the soft interface information
1524  * Sends copies of a frame with multicast destination to any node with a
1526  * batman-adv unicast packet for each such destination node.
1541 				 &bat_priv->mcast.want_all_ipv6_list,  in batadv_mcast_forw_want_all_ipv6()
1556  * batadv_mcast_forw_want_all() - forward packet to nodes in a want-all list
1557  * @bat_priv: the bat priv with all the soft interface information
1561  * Sends copies of a frame with multicast destination to any node with a
1563  * transmission is performed via a batman-adv unicast packet for each such
1564  * destination node.
1573 	switch (ntohs(eth_hdr(skb)->h_proto)) {  in batadv_mcast_forw_want_all()
1585  * batadv_mcast_forw_want_all_rtr4() - forward to nodes with want-all-rtr4
1586  * @bat_priv: the bat priv with all the soft interface information
1590  * Sends copies of a frame with multicast destination to any node with a
1592  * batman-adv unicast packet for each such destination node.
1607 				 &bat_priv->mcast.want_all_rtr4_list,  in batadv_mcast_forw_want_all_rtr4()
1622  * batadv_mcast_forw_want_all_rtr6() - forward to nodes with want-all-rtr6
1623  * @bat_priv: the bat priv with all the soft interface information
1627  * Sends copies of a frame with multicast destination to any node with a
1629  * batman-adv unicast packet for each such destination node.
1644 				 &bat_priv->mcast.want_all_rtr6_list,  in batadv_mcast_forw_want_all_rtr6()
1659  * batadv_mcast_forw_want_rtr() - forward packet to nodes in a want-all-rtr list
1660  * @bat_priv: the bat priv with all the soft interface information
1664  * Sends copies of a frame with multicast destination to any node with a
1666  * transmission is performed via a batman-adv unicast packet for each such
1667  * destination node.
1676 	switch (ntohs(eth_hdr(skb)->h_proto)) {  in batadv_mcast_forw_want_rtr()
1688  * batadv_mcast_forw_send() - send packet to any detected multicast recipient
1689  * @bat_priv: the bat priv with all the soft interface information
1693  * Sends copies of a frame with multicast destination to any node that signaled
1695  * want-all flags. A transmission is performed via a batman-adv unicast packet
1696  * for each such destination node.
1731  * batadv_mcast_want_unsnoop_update() - update unsnoop counter and list
1732  * @bat_priv: the bat priv with all the soft interface information
1740  * Caller needs to hold orig->mcast_handler_lock.
1746 	struct hlist_node *node = &orig->mcast_want_all_unsnoopables_node;  in batadv_mcast_want_unsnoop_update()  local
1747 	struct hlist_head *head = &bat_priv->mcast.want_all_unsnoopables_list;  in batadv_mcast_want_unsnoop_update()
1749 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_unsnoop_update()
1753 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)) {  in batadv_mcast_want_unsnoop_update()
1754 		atomic_inc(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_want_unsnoop_update()
1756 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1758 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_unsnoop_update()
1760 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_unsnoop_update()
1761 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1764 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) {  in batadv_mcast_want_unsnoop_update()
1765 		atomic_dec(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_want_unsnoop_update()
1767 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1769 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_unsnoop_update()
1771 		hlist_del_init_rcu(node);  in batadv_mcast_want_unsnoop_update()
1772 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1777  * batadv_mcast_want_ipv4_update() - update want-all-ipv4 counter and list
1778  * @bat_priv: the bat priv with all the soft interface information
1785  * Caller needs to hold orig->mcast_handler_lock.
1791 	struct hlist_node *node = &orig->mcast_want_all_ipv4_node;  in batadv_mcast_want_ipv4_update()  local
1792 	struct hlist_head *head = &bat_priv->mcast.want_all_ipv4_list;  in batadv_mcast_want_ipv4_update()
1794 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_ipv4_update()
1798 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) {  in batadv_mcast_want_ipv4_update()
1799 		atomic_inc(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_want_ipv4_update()
1801 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1803 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_ipv4_update()
1805 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_ipv4_update()
1806 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1809 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) {  in batadv_mcast_want_ipv4_update()
1810 		atomic_dec(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_want_ipv4_update()
1812 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1814 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_ipv4_update()
1816 		hlist_del_init_rcu(node);  in batadv_mcast_want_ipv4_update()
1817 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1822  * batadv_mcast_want_ipv6_update() - update want-all-ipv6 counter and list
1823  * @bat_priv: the bat priv with all the soft interface information
1830  * Caller needs to hold orig->mcast_handler_lock.
1836 	struct hlist_node *node = &orig->mcast_want_all_ipv6_node;  in batadv_mcast_want_ipv6_update()  local
1837 	struct hlist_head *head = &bat_priv->mcast.want_all_ipv6_list;  in batadv_mcast_want_ipv6_update()
1839 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_ipv6_update()
1843 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) {  in batadv_mcast_want_ipv6_update()
1844 		atomic_inc(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_want_ipv6_update()
1846 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1848 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_ipv6_update()
1850 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_ipv6_update()
1851 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1854 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) {  in batadv_mcast_want_ipv6_update()
1855 		atomic_dec(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_want_ipv6_update()
1857 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1859 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_ipv6_update()
1861 		hlist_del_init_rcu(node);  in batadv_mcast_want_ipv6_update()
1862 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1867  * batadv_mcast_want_rtr4_update() - update want-all-rtr4 counter and list
1868  * @bat_priv: the bat priv with all the soft interface information
1875  * Caller needs to hold orig->mcast_handler_lock.
1881 	struct hlist_node *node = &orig->mcast_want_all_rtr4_node;  in batadv_mcast_want_rtr4_update()  local
1882 	struct hlist_head *head = &bat_priv->mcast.want_all_rtr4_list;  in batadv_mcast_want_rtr4_update()
1884 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_rtr4_update()
1888 	    orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR4) {  in batadv_mcast_want_rtr4_update()
1889 		atomic_inc(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_want_rtr4_update()
1891 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1893 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_rtr4_update()
1895 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_rtr4_update()
1896 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1899 		   !(orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR4)) {  in batadv_mcast_want_rtr4_update()
1900 		atomic_dec(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_want_rtr4_update()
1902 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1904 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_rtr4_update()
1906 		hlist_del_init_rcu(node);  in batadv_mcast_want_rtr4_update()
1907 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1912  * batadv_mcast_want_rtr6_update() - update want-all-rtr6 counter and list
1913  * @bat_priv: the bat priv with all the soft interface information
1920  * Caller needs to hold orig->mcast_handler_lock.
1926 	struct hlist_node *node = &orig->mcast_want_all_rtr6_node;  in batadv_mcast_want_rtr6_update()  local
1927 	struct hlist_head *head = &bat_priv->mcast.want_all_rtr6_list;  in batadv_mcast_want_rtr6_update()
1929 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_rtr6_update()
1933 	    orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR6) {  in batadv_mcast_want_rtr6_update()
1934 		atomic_inc(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_want_rtr6_update()
1936 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1938 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_rtr6_update()
1940 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_rtr6_update()
1941 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1944 		   !(orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR6)) {  in batadv_mcast_want_rtr6_update()
1945 		atomic_dec(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_want_rtr6_update()
1947 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1949 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_rtr6_update()
1951 		hlist_del_init_rcu(node);  in batadv_mcast_want_rtr6_update()
1952 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1957  * batadv_mcast_tvlv_flags_get() - get multicast flags from an OGM TVLV
1988  * batadv_mcast_tvlv_ogm_handler() - process incoming multicast tvlv container
1989  * @bat_priv: the bat priv with all the soft interface information
2007 	spin_lock_bh(&orig->mcast_handler_lock);  in batadv_mcast_tvlv_ogm_handler()
2010 	    !test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) {  in batadv_mcast_tvlv_ogm_handler()
2011 		set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities);  in batadv_mcast_tvlv_ogm_handler()
2013 		   test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) {  in batadv_mcast_tvlv_ogm_handler()
2014 		clear_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities);  in batadv_mcast_tvlv_ogm_handler()
2017 	set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capa_initialized);  in batadv_mcast_tvlv_ogm_handler()
2025 	orig->mcast_flags = mcast_flags;  in batadv_mcast_tvlv_ogm_handler()
2026 	spin_unlock_bh(&orig->mcast_handler_lock);  in batadv_mcast_tvlv_ogm_handler()
2030  * batadv_mcast_init() - initialize the multicast optimizations structures
2031  * @bat_priv: the bat priv with all the soft interface information
2039 	INIT_DELAYED_WORK(&bat_priv->mcast.work, batadv_mcast_mla_update);  in batadv_mcast_init()
2044  * batadv_mcast_mesh_info_put() - put multicast info into a netlink message
2046  * @bat_priv: the bat priv with all the soft interface information
2053 	u32 flags = bat_priv->mcast.mla_flags.tvlv_flags;  in batadv_mcast_mesh_info_put()
2056 	if (bat_priv->mcast.mla_flags.bridged) {  in batadv_mcast_mesh_info_put()
2059 		if (bat_priv->mcast.mla_flags.querier_ipv4.exists)  in batadv_mcast_mesh_info_put()
2061 		if (bat_priv->mcast.mla_flags.querier_ipv6.exists)  in batadv_mcast_mesh_info_put()
2063 		if (bat_priv->mcast.mla_flags.querier_ipv4.shadowing)  in batadv_mcast_mesh_info_put()
2065 		if (bat_priv->mcast.mla_flags.querier_ipv6.shadowing)  in batadv_mcast_mesh_info_put()
2071 		return -EMSGSIZE;  in batadv_mcast_mesh_info_put()
2077  * batadv_mcast_flags_dump_entry() - dump one entry of the multicast flags table
2093 	hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq,  in batadv_mcast_flags_dump_entry()
2097 		return -ENOBUFS;  in batadv_mcast_flags_dump_entry()
2102 		    orig_node->orig)) {  in batadv_mcast_flags_dump_entry()
2104 		return -EMSGSIZE;  in batadv_mcast_flags_dump_entry()
2108 		     &orig_node->capabilities)) {  in batadv_mcast_flags_dump_entry()
2110 				orig_node->mcast_flags)) {  in batadv_mcast_flags_dump_entry()
2112 			return -EMSGSIZE;  in batadv_mcast_flags_dump_entry()
2121  * batadv_mcast_flags_dump_bucket() - dump one bucket of the multicast flags
2141 	spin_lock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2142 	cb->seq = atomic_read(&hash->generation) << 1 | 1;  in batadv_mcast_flags_dump_bucket()
2144 	hlist_for_each_entry(orig_node, &hash->table[bucket], hash_entry) {  in batadv_mcast_flags_dump_bucket()
2146 			      &orig_node->capa_initialized))  in batadv_mcast_flags_dump_bucket()
2153 			spin_unlock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2156 			return -EMSGSIZE;  in batadv_mcast_flags_dump_bucket()
2162 	spin_unlock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2168  * __batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket
2172  * @bat_priv: the bat priv with all the soft interface information
2183 	struct batadv_hashtable *hash = bat_priv->orig_hash;  in __batadv_mcast_flags_dump()
2187 	while (bucket_tmp < hash->size) {  in __batadv_mcast_flags_dump()
2199 	return msg->len;  in __batadv_mcast_flags_dump()
2203  * batadv_mcast_netlink_get_primary() - get primary interface from netlink
2206  * @primary_if: the primary interface pointer to return the result in
2215 	struct net *net = sock_net(cb->skb->sk);  in batadv_mcast_netlink_get_primary()
2221 	ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);  in batadv_mcast_netlink_get_primary()
2223 		return -EINVAL;  in batadv_mcast_netlink_get_primary()
2227 		ret = -ENODEV;  in batadv_mcast_netlink_get_primary()
2234 	if (!hard_iface || hard_iface->if_status != BATADV_IF_ACTIVE) {  in batadv_mcast_netlink_get_primary()
2235 		ret = -ENOENT;  in batadv_mcast_netlink_get_primary()
2251  * batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket
2260 	int portid = NETLINK_CB(cb->skb).portid;  in batadv_mcast_flags_dump()
2262 	long *bucket = &cb->args[0];  in batadv_mcast_flags_dump()
2263 	long *idx = &cb->args[1];  in batadv_mcast_flags_dump()
2270 	bat_priv = netdev_priv(primary_if->soft_iface);  in batadv_mcast_flags_dump()
2278  * batadv_mcast_free() - free the multicast optimizations structures
2279  * @bat_priv: the bat priv with all the soft interface information
2283 	cancel_delayed_work_sync(&bat_priv->mcast.work);  in batadv_mcast_free()
2293  * batadv_mcast_purge_orig() - reset originator global mcast state modifications
2298 	struct batadv_priv *bat_priv = orig->bat_priv;  in batadv_mcast_purge_orig()
2300 	spin_lock_bh(&orig->mcast_handler_lock);  in batadv_mcast_purge_orig()
2310 	spin_unlock_bh(&orig->mcast_handler_lock);  in batadv_mcast_purge_orig()