1 // SPDX-License-Identifier: GPL-2.0
54 #include "hard-interface.h"
59 #include "translation-table.h"
65  * batadv_mcast_start_timer() - schedule the multicast periodic worker
66  * @bat_priv: the bat priv with all the mesh interface information
70 	queue_delayed_work(batadv_event_workqueue, &bat_priv->mcast.work,  in batadv_mcast_start_timer()
75  * batadv_mcast_get_bridge() - get the bridge on top of the meshif if it exists
76  * @mesh_iface: netdev struct of the mesh interface
78  * If the given mesh interface has a bridge on top then the refcount
100  * batadv_mcast_mla_rtr_flags_meshif_get_ipv4() - get mcast router flags from
101  *  node for IPv4
102  * @dev: the interface to check
104  * Checks the presence of an IPv4 multicast router on this node.
121  * batadv_mcast_mla_rtr_flags_meshif_get_ipv6() - get mcast router flags from
122  *  node for IPv6
123  * @dev: the interface to check
125  * Checks the presence of an IPv6 multicast router on this node.
136 	if (in6_dev && atomic_read(&in6_dev->cnf.mc_forwarding))  in batadv_mcast_mla_rtr_flags_meshif_get_ipv6()
150  * batadv_mcast_mla_rtr_flags_meshif_get() - get mcast router flags from node
151  * @bat_priv: the bat priv with all the mesh interface information
152  * @bridge: bridge interface on top of the mesh_iface if present,
156  * node.
167 	struct net_device *dev = bridge ? bridge : bat_priv->mesh_iface;  in batadv_mcast_mla_rtr_flags_meshif_get()
181  * batadv_mcast_mla_rtr_flags_bridge_get() - get mcast router flags from bridge
182  * @bat_priv: the bat priv with all the mesh interface information
183  * @bridge: bridge interface on top of the mesh_iface if present,
197 	struct net_device *dev = bat_priv->mesh_iface;  in batadv_mcast_mla_rtr_flags_bridge_get()
212  * batadv_mcast_mla_rtr_flags_get() - get multicast router flags
213  * @bat_priv: the bat priv with all the mesh interface information
214  * @bridge: bridge interface on top of the mesh_iface if present,
218  * node or behind its bridge.
238  * batadv_mcast_mla_forw_flags_get() - get multicast forwarding flags
239  * @bat_priv: the bat priv with all the mesh interface information
252 		if (hard_iface->if_status != BATADV_IF_ACTIVE)  in batadv_mcast_mla_forw_flags_get()
255 		if (hard_iface->mesh_iface != bat_priv->mesh_iface)  in batadv_mcast_mla_forw_flags_get()
258 		if (hard_iface->net_dev->mtu < IPV6_MIN_MTU) {  in batadv_mcast_mla_forw_flags_get()
269  * batadv_mcast_mla_flags_get() - get the new multicast flags
270  * @bat_priv: the bat priv with all the mesh interface information
278 	struct net_device *dev = bat_priv->mesh_iface;  in batadv_mcast_mla_flags_get()
301 		pr_warn_once("No bridge IGMP snooping compiled - multicast optimizations disabled\n");  in batadv_mcast_mla_flags_get()
303 	qr4->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IP);  in batadv_mcast_mla_flags_get()
304 	qr4->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IP);  in batadv_mcast_mla_flags_get()
306 	qr6->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IPV6);  in batadv_mcast_mla_flags_get()
307 	qr6->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IPV6);  in batadv_mcast_mla_flags_get()
320 	if (!qr4->exists || qr4->shadowing) {  in batadv_mcast_mla_flags_get()
325 	if (!qr6->exists || qr6->shadowing) {  in batadv_mcast_mla_flags_get()
334  * batadv_mcast_mla_is_duplicate() - check whether an address is in a list
347 		if (batadv_compare_eth(mcast_entry->addr, mcast_addr))  in batadv_mcast_mla_is_duplicate()
354  * batadv_mcast_mla_meshif_get_ipv4() - get meshif IPv4 multicast listeners
360  * on this kernel on the given mesh interface, dev, in
362  * your multicast receiving applications run directly on this node.
364  * Return: -ENOMEM on memory allocation error or the number of
378 	if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV4)  in batadv_mcast_mla_meshif_get_ipv4()
389 	for (pmc = rcu_dereference(in_dev->mc_list); pmc;  in batadv_mcast_mla_meshif_get_ipv4()
390 	     pmc = rcu_dereference(pmc->next_rcu)) {  in batadv_mcast_mla_meshif_get_ipv4()
391 		if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&  in batadv_mcast_mla_meshif_get_ipv4()
392 		    ipv4_is_local_multicast(pmc->multiaddr))  in batadv_mcast_mla_meshif_get_ipv4()
395 		if (!(flags->tvlv_flags & BATADV_MCAST_WANT_NO_RTR4) &&  in batadv_mcast_mla_meshif_get_ipv4()
396 		    !ipv4_is_local_multicast(pmc->multiaddr))  in batadv_mcast_mla_meshif_get_ipv4()
399 		ip_eth_mc_map(pmc->multiaddr, mcast_addr);  in batadv_mcast_mla_meshif_get_ipv4()
406 			ret = -ENOMEM;  in batadv_mcast_mla_meshif_get_ipv4()
410 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_meshif_get_ipv4()
411 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_meshif_get_ipv4()
420  * batadv_mcast_mla_meshif_get_ipv6() - get meshif IPv6 multicast listeners
426  * on this kernel on the given mesh interface, dev, in
428  * your multicast receiving applications run directly on this node.
430  * Return: -ENOMEM on memory allocation error or the number of
445 	if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV6)  in batadv_mcast_mla_meshif_get_ipv6()
456 	for (pmc6 = rcu_dereference(in6_dev->mc_list);  in batadv_mcast_mla_meshif_get_ipv6()
458 	     pmc6 = rcu_dereference(pmc6->next)) {  in batadv_mcast_mla_meshif_get_ipv6()
459 		if (IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) <  in batadv_mcast_mla_meshif_get_ipv6()
463 		if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&  in batadv_mcast_mla_meshif_get_ipv6()
464 		    ipv6_addr_is_ll_all_nodes(&pmc6->mca_addr))  in batadv_mcast_mla_meshif_get_ipv6()
467 		if (!(flags->tvlv_flags & BATADV_MCAST_WANT_NO_RTR6) &&  in batadv_mcast_mla_meshif_get_ipv6()
468 		    IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) >  in batadv_mcast_mla_meshif_get_ipv6()
472 		ipv6_eth_mc_map(&pmc6->mca_addr, mcast_addr);  in batadv_mcast_mla_meshif_get_ipv6()
479 			ret = -ENOMEM;  in batadv_mcast_mla_meshif_get_ipv6()
483 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_meshif_get_ipv6()
484 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_meshif_get_ipv6()
502  * batadv_mcast_mla_meshif_get() - get meshif multicast listeners
508  * on this kernel on the given mesh interface, dev, in
510  * your multicast receiving applications run directly on this node.
512  * If there is a bridge interface on top of dev, collect from that one
514  * will(/should) register to the bridge interface instead of an
517  * Return: -ENOMEM on memory allocation error or the number of
548  * batadv_mcast_mla_br_addr_cpy() - copy a bridge multicast address
549  * @dst: destination to write to - a multicast MAC address
550  * @src: source to read from - a multicast IP address
561 	if (src->proto == htons(ETH_P_IP))  in batadv_mcast_mla_br_addr_cpy()
562 		ip_eth_mc_map(src->dst.ip4, dst);  in batadv_mcast_mla_br_addr_cpy()
564 	else if (src->proto == htons(ETH_P_IPV6))  in batadv_mcast_mla_br_addr_cpy()
565 		ipv6_eth_mc_map(&src->dst.ip6, dst);  in batadv_mcast_mla_br_addr_cpy()
572  * batadv_mcast_mla_bridge_get() - get bridged-in multicast listeners
578  * on foreign, non-mesh devices which we gave access to our mesh via
579  * a bridge on top of the given mesh interface, dev, in the given
582  * Return: -ENOMEM on memory allocation error or the number of
591 	u8 tvlv_flags = flags->tvlv_flags;  in batadv_mcast_mla_bridge_get()
604 		if (br_ip_entry->addr.proto == htons(ETH_P_IP)) {  in batadv_mcast_mla_bridge_get()
609 			    ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))  in batadv_mcast_mla_bridge_get()
613 			    !ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))  in batadv_mcast_mla_bridge_get()
618 		if (br_ip_entry->addr.proto == htons(ETH_P_IPV6)) {  in batadv_mcast_mla_bridge_get()
623 			    ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.dst.ip6))  in batadv_mcast_mla_bridge_get()
627 			    IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.dst.ip6) >  in batadv_mcast_mla_bridge_get()
633 		batadv_mcast_mla_br_addr_cpy(mcast_addr, &br_ip_entry->addr);  in batadv_mcast_mla_bridge_get()
639 			ret = -ENOMEM;  in batadv_mcast_mla_bridge_get()
643 		ether_addr_copy(new->addr, mcast_addr);  in batadv_mcast_mla_bridge_get()
644 		hlist_add_head(&new->list, mcast_list);  in batadv_mcast_mla_bridge_get()
649 		list_del(&br_ip_entry->list);  in batadv_mcast_mla_bridge_get()
657  * batadv_mcast_mla_list_free() - free a list of multicast addresses
668 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_list_free()
674  * batadv_mcast_mla_tt_retract() - clean up multicast listener announcements
675  * @bat_priv: the bat priv with all the mesh interface information
689 	hlist_for_each_entry_safe(mcast_entry, tmp, &bat_priv->mcast.mla_list,  in batadv_mcast_mla_tt_retract()
692 		    batadv_mcast_mla_is_duplicate(mcast_entry->addr,  in batadv_mcast_mla_tt_retract()
696 		batadv_tt_local_remove(bat_priv, mcast_entry->addr,  in batadv_mcast_mla_tt_retract()
700 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_tt_retract()
706  * batadv_mcast_mla_tt_add() - add multicast listener announcements
707  * @bat_priv: the bat priv with all the mesh interface information
723 		if (batadv_mcast_mla_is_duplicate(mcast_entry->addr,  in batadv_mcast_mla_tt_add()
724 						  &bat_priv->mcast.mla_list))  in batadv_mcast_mla_tt_add()
727 		if (!batadv_tt_local_add(bat_priv->mesh_iface,  in batadv_mcast_mla_tt_add()
728 					 mcast_entry->addr, BATADV_NO_FLAGS,  in batadv_mcast_mla_tt_add()
732 		hlist_del(&mcast_entry->list);  in batadv_mcast_mla_tt_add()
733 		hlist_add_head(&mcast_entry->list, &bat_priv->mcast.mla_list);  in batadv_mcast_mla_tt_add()
738  * batadv_mcast_querier_log() - debug output regarding the querier status on
740  * @bat_priv: the bat priv with all the mesh interface information
752  * forward listener reports to the querier, therefore batman-adv and
753  * the bridge will potentially not see these listeners - the querier is
757  * mesh interface.
764 	if (!old_state->exists && new_state->exists)  in batadv_mcast_querier_log()
765 		batadv_info(bat_priv->mesh_iface, "%s Querier appeared\n",  in batadv_mcast_querier_log()
767 	else if (old_state->exists && !new_state->exists)  in batadv_mcast_querier_log()
768 		batadv_info(bat_priv->mesh_iface,  in batadv_mcast_querier_log()
769 			    "%s Querier disappeared - multicast optimizations disabled\n",  in batadv_mcast_querier_log()
771 	else if (!bat_priv->mcast.mla_flags.bridged && !new_state->exists)  in batadv_mcast_querier_log()
772 		batadv_info(bat_priv->mesh_iface,  in batadv_mcast_querier_log()
773 			    "No %s Querier present - multicast optimizations disabled\n",  in batadv_mcast_querier_log()
776 	if (new_state->exists) {  in batadv_mcast_querier_log()
777 		if ((!old_state->shadowing && new_state->shadowing) ||  in batadv_mcast_querier_log()
778 		    (!old_state->exists && new_state->shadowing))  in batadv_mcast_querier_log()
782 		else if (old_state->shadowing && !new_state->shadowing)  in batadv_mcast_querier_log()
790  * batadv_mcast_bridge_log() - debug output for topology changes in bridged
792  * @bat_priv: the bat priv with all the mesh interface information
795  * If no bridges are ever used on this node, then this function does nothing.
800  * More precisely, it outputs information when a bridge interface is added or
801  * removed from a mesh interface. And when a bridge is present, it further
803  * multicast flags this node is going to set.
809 	struct batadv_mcast_mla_flags *old_flags = &bat_priv->mcast.mla_flags;  in batadv_mcast_bridge_log()
811 	if (!old_flags->bridged && new_flags->bridged)  in batadv_mcast_bridge_log()
813 			   "Bridge added: Setting Unsnoopables(U)-flag\n");  in batadv_mcast_bridge_log()
814 	else if (old_flags->bridged && !new_flags->bridged)  in batadv_mcast_bridge_log()
816 			   "Bridge removed: Unsetting Unsnoopables(U)-flag\n");  in batadv_mcast_bridge_log()
818 	if (new_flags->bridged) {  in batadv_mcast_bridge_log()
820 					 &old_flags->querier_ipv4,  in batadv_mcast_bridge_log()
821 					 &new_flags->querier_ipv4);  in batadv_mcast_bridge_log()
823 					 &old_flags->querier_ipv6,  in batadv_mcast_bridge_log()
824 					 &new_flags->querier_ipv6);  in batadv_mcast_bridge_log()
829  * batadv_mcast_flags_log() - output debug information about mcast flag changes
830  * @bat_priv: the bat priv with all the mesh interface information
833  * Whenever the multicast TVLV flags this node announces change, this function
838 	bool old_enabled = bat_priv->mcast.mla_flags.enabled;  in batadv_mcast_flags_log()
839 	u8 old_flags = bat_priv->mcast.mla_flags.tvlv_flags;  in batadv_mcast_flags_log()
862  * batadv_mcast_mla_flags_update() - update multicast flags
863  * @bat_priv: the bat priv with all the mesh interface information
875 	if (!memcmp(flags, &bat_priv->mcast.mla_flags, sizeof(*flags)))  in batadv_mcast_mla_flags_update()
879 	batadv_mcast_flags_log(bat_priv, flags->tvlv_flags);  in batadv_mcast_mla_flags_update()
881 	mcast_data.flags = flags->tvlv_flags;  in batadv_mcast_mla_flags_update()
887 	bat_priv->mcast.mla_flags = *flags;  in batadv_mcast_mla_flags_update()
891  * __batadv_mcast_mla_update() - update the own MLAs
892  * @bat_priv: the bat priv with all the mesh interface information
897  * Note that non-conflicting reads and writes to bat_priv->mcast.mla_list
899  * ensured by the non-parallel execution of the worker this function
904 	struct net_device *mesh_iface = bat_priv->mesh_iface;  in __batadv_mcast_mla_update()
919 	spin_lock(&bat_priv->mcast.mla_lock);  in __batadv_mcast_mla_update()
923 	spin_unlock(&bat_priv->mcast.mla_lock);  in __batadv_mcast_mla_update()
930  * batadv_mcast_mla_update() - update the own MLAs
953  * batadv_mcast_is_report_ipv4() - check for IGMP reports
967 	switch (igmp_hdr(skb)->type) {  in batadv_mcast_is_report_ipv4()
978  * batadv_mcast_forw_mode_check_ipv4() - check for optimized forwarding
980  * @bat_priv: the bat priv with all the mesh interface information
988  * Return: If so then 0. Otherwise -EINVAL or -ENOMEM in case of memory
998 	/* We might fail due to out-of-memory -> drop it */  in batadv_mcast_forw_mode_check_ipv4()
1000 		return -ENOMEM;  in batadv_mcast_forw_mode_check_ipv4()
1003 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv4()
1007 	/* link-local multicast listeners behind a bridge are  in batadv_mcast_forw_mode_check_ipv4()
1010 	if (ipv4_is_local_multicast(iphdr->daddr))  in batadv_mcast_forw_mode_check_ipv4()
1019  * batadv_mcast_is_report_ipv6() - check for MLD reports
1033 	switch (icmp6_hdr(skb)->icmp6_type) {  in batadv_mcast_is_report_ipv6()
1043  * batadv_mcast_forw_mode_check_ipv6() - check for optimized forwarding
1045  * @bat_priv: the bat priv with all the mesh interface information
1053  * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory
1062 	/* We might fail due to out-of-memory -> drop it */  in batadv_mcast_forw_mode_check_ipv6()
1064 		return -ENOMEM;  in batadv_mcast_forw_mode_check_ipv6()
1067 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv6()
1071 	if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) < IPV6_ADDR_SCOPE_LINKLOCAL)  in batadv_mcast_forw_mode_check_ipv6()
1072 		return -EINVAL;  in batadv_mcast_forw_mode_check_ipv6()
1074 	/* link-local-all-nodes multicast listeners behind a bridge are  in batadv_mcast_forw_mode_check_ipv6()
1077 	if (ipv6_addr_is_ll_all_nodes(&ip6hdr->daddr))  in batadv_mcast_forw_mode_check_ipv6()
1079 	else if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) > IPV6_ADDR_SCOPE_LINKLOCAL)  in batadv_mcast_forw_mode_check_ipv6()
1086  * batadv_mcast_forw_mode_check() - check for optimized forwarding potential
1087  * @bat_priv: the bat priv with all the mesh interface information
1095  * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory
1104 	if (!atomic_read(&bat_priv->multicast_mode))  in batadv_mcast_forw_mode_check()
1105 		return -EINVAL;  in batadv_mcast_forw_mode_check()
1107 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_mode_check()
1114 			return -EINVAL;  in batadv_mcast_forw_mode_check()
1120 		return -EINVAL;  in batadv_mcast_forw_mode_check()
1125  * batadv_mcast_forw_want_all_ip_count() - count nodes with unspecific mcast
1127  * @bat_priv: the bat priv with all the mesh interface information
1137 	switch (ntohs(ethhdr->h_proto)) {  in batadv_mcast_forw_want_all_ip_count()
1139 		return atomic_read(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_forw_want_all_ip_count()
1141 		return atomic_read(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_forw_want_all_ip_count()
1149  * batadv_mcast_forw_rtr_count() - count nodes with a multicast router
1150  * @bat_priv: the bat priv with all the mesh interface information
1163 		return atomic_read(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_forw_rtr_count()
1165 		return atomic_read(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_forw_rtr_count()
1172  * batadv_mcast_forw_mode_by_count() - get forwarding mode by count
1173  * @bat_priv: the bat priv with all the mesh interface information
1181  * complete batman-adv multicast header.
1187  *	would still fit into an 1280 bytes batman-adv multicast packet
1189  *	the full batman-adv multicast packet header.
1190  *	BATADV_FORW_UCASTS: If the packet cannot be sent in a batman-adv
1191  *	multicast packet and the amount of batman-adv unicast packets needed
1201 	u8 own_tvlv_flags = bat_priv->mcast.mla_flags.tvlv_flags;  in batadv_mcast_forw_mode_by_count()
1203 	if (!atomic_read(&bat_priv->mcast.num_no_mc_ptype_capa) &&  in batadv_mcast_forw_mode_by_count()
1205 	    skb->len + mcast_hdrlen <= IPV6_MIN_MTU &&  in batadv_mcast_forw_mode_by_count()
1209 	if (count <= atomic_read(&bat_priv->multicast_fanout))  in batadv_mcast_forw_mode_by_count()
1216  * batadv_mcast_forw_mode() - check on how to forward a multicast packet
1217  * @bat_priv: the bat priv with all the mesh interface information
1235 	if (ret == -ENOMEM)  in batadv_mcast_forw_mode()
1242 	tt_count = batadv_tt_global_hash_count(bat_priv, ethhdr->h_dest,  in batadv_mcast_forw_mode()
1246 			atomic_read(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_forw_mode()
1261  * batadv_mcast_forw_send_orig() - send a multicast packet to an originator
1262  * @bat_priv: the bat priv with all the mesh interface information
1274 	/* Avoid sending multicast-in-unicast packets to other BLA  in batadv_mcast_forw_send_orig()
1275 	 * gateways - they already got the frame from the LAN side  in batadv_mcast_forw_send_orig()
1280 	if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) {  in batadv_mcast_forw_send_orig()
1290  * batadv_mcast_forw_tt() - forwards a packet to multicast listeners
1291  * @bat_priv: the bat priv with all the mesh interface information
1297  * via a batman-adv unicast packet for each such destination node.
1312 	const u8 *addr = eth_hdr(skb)->h_dest;  in batadv_mcast_forw_tt()
1319 	hlist_for_each_entry_rcu(orig_entry, &tt_global->orig_list, list) {  in batadv_mcast_forw_tt()
1327 					    orig_entry->orig_node);  in batadv_mcast_forw_tt()
1338  * batadv_mcast_forw_want_all_ipv4() - forward to nodes with want-all-ipv4
1339  * @bat_priv: the bat priv with all the mesh interface information
1343  * Sends copies of a frame with multicast destination to any node with a
1345  * batman-adv unicast packet for each such destination node.
1360 				 &bat_priv->mcast.want_all_ipv4_list,  in batadv_mcast_forw_want_all_ipv4()
1375  * batadv_mcast_forw_want_all_ipv6() - forward to nodes with want-all-ipv6
1376  * @bat_priv: the bat priv with all the mesh interface information
1380  * Sends copies of a frame with multicast destination to any node with a
1382  * batman-adv unicast packet for each such destination node.
1397 				 &bat_priv->mcast.want_all_ipv6_list,  in batadv_mcast_forw_want_all_ipv6()
1412  * batadv_mcast_forw_want_all() - forward packet to nodes in a want-all list
1413  * @bat_priv: the bat priv with all the mesh interface information
1417  * Sends copies of a frame with multicast destination to any node with a
1419  * transmission is performed via a batman-adv unicast packet for each such
1420  * destination node.
1429 	switch (ntohs(eth_hdr(skb)->h_proto)) {  in batadv_mcast_forw_want_all()
1441  * batadv_mcast_forw_want_all_rtr4() - forward to nodes with want-all-rtr4
1442  * @bat_priv: the bat priv with all the mesh interface information
1446  * Sends copies of a frame with multicast destination to any node with a
1448  * batman-adv unicast packet for each such destination node.
1463 				 &bat_priv->mcast.want_all_rtr4_list,  in batadv_mcast_forw_want_all_rtr4()
1478  * batadv_mcast_forw_want_all_rtr6() - forward to nodes with want-all-rtr6
1479  * @bat_priv: the bat priv with all the mesh interface information
1483  * Sends copies of a frame with multicast destination to any node with a
1485  * batman-adv unicast packet for each such destination node.
1500 				 &bat_priv->mcast.want_all_rtr6_list,  in batadv_mcast_forw_want_all_rtr6()
1515  * batadv_mcast_forw_want_rtr() - forward packet to nodes in a want-all-rtr list
1516  * @bat_priv: the bat priv with all the mesh interface information
1520  * Sends copies of a frame with multicast destination to any node with a
1522  * transmission is performed via a batman-adv unicast packet for each such
1523  * destination node.
1532 	switch (ntohs(eth_hdr(skb)->h_proto)) {  in batadv_mcast_forw_want_rtr()
1544  * batadv_mcast_forw_send() - send packet to any detected multicast recipient
1545  * @bat_priv: the bat priv with all the mesh interface information
1550  * Sends copies of a frame with multicast destination to any node that signaled
1552  * want-all flags. A transmission is performed via a batman-adv unicast packet
1553  * for each such destination node.
1592  * batadv_mcast_want_unsnoop_update() - update unsnoop counter and list
1593  * @bat_priv: the bat priv with all the mesh interface information
1601  * Caller needs to hold orig->mcast_handler_lock.
1607 	struct hlist_node *node = &orig->mcast_want_all_unsnoopables_node;  in batadv_mcast_want_unsnoop_update()  local
1608 	struct hlist_head *head = &bat_priv->mcast.want_all_unsnoopables_list;  in batadv_mcast_want_unsnoop_update()
1610 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_unsnoop_update()
1614 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)) {  in batadv_mcast_want_unsnoop_update()
1615 		atomic_inc(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_want_unsnoop_update()
1617 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1619 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_unsnoop_update()
1621 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_unsnoop_update()
1622 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1625 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) {  in batadv_mcast_want_unsnoop_update()
1626 		atomic_dec(&bat_priv->mcast.num_want_all_unsnoopables);  in batadv_mcast_want_unsnoop_update()
1628 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1630 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_unsnoop_update()
1632 		hlist_del_init_rcu(node);  in batadv_mcast_want_unsnoop_update()
1633 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_unsnoop_update()
1638  * batadv_mcast_want_ipv4_update() - update want-all-ipv4 counter and list
1639  * @bat_priv: the bat priv with all the mesh interface information
1646  * Caller needs to hold orig->mcast_handler_lock.
1652 	struct hlist_node *node = &orig->mcast_want_all_ipv4_node;  in batadv_mcast_want_ipv4_update()  local
1653 	struct hlist_head *head = &bat_priv->mcast.want_all_ipv4_list;  in batadv_mcast_want_ipv4_update()
1655 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_ipv4_update()
1659 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) {  in batadv_mcast_want_ipv4_update()
1660 		atomic_inc(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_want_ipv4_update()
1662 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1664 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_ipv4_update()
1666 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_ipv4_update()
1667 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1670 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) {  in batadv_mcast_want_ipv4_update()
1671 		atomic_dec(&bat_priv->mcast.num_want_all_ipv4);  in batadv_mcast_want_ipv4_update()
1673 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1675 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_ipv4_update()
1677 		hlist_del_init_rcu(node);  in batadv_mcast_want_ipv4_update()
1678 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv4_update()
1683  * batadv_mcast_want_ipv6_update() - update want-all-ipv6 counter and list
1684  * @bat_priv: the bat priv with all the mesh interface information
1691  * Caller needs to hold orig->mcast_handler_lock.
1697 	struct hlist_node *node = &orig->mcast_want_all_ipv6_node;  in batadv_mcast_want_ipv6_update()  local
1698 	struct hlist_head *head = &bat_priv->mcast.want_all_ipv6_list;  in batadv_mcast_want_ipv6_update()
1700 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_ipv6_update()
1704 	    !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) {  in batadv_mcast_want_ipv6_update()
1705 		atomic_inc(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_want_ipv6_update()
1707 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1709 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_ipv6_update()
1711 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_ipv6_update()
1712 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1715 		   orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) {  in batadv_mcast_want_ipv6_update()
1716 		atomic_dec(&bat_priv->mcast.num_want_all_ipv6);  in batadv_mcast_want_ipv6_update()
1718 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1720 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_ipv6_update()
1722 		hlist_del_init_rcu(node);  in batadv_mcast_want_ipv6_update()
1723 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_ipv6_update()
1728  * batadv_mcast_want_rtr4_update() - update want-all-rtr4 counter and list
1729  * @bat_priv: the bat priv with all the mesh interface information
1736  * Caller needs to hold orig->mcast_handler_lock.
1742 	struct hlist_node *node = &orig->mcast_want_all_rtr4_node;  in batadv_mcast_want_rtr4_update()  local
1743 	struct hlist_head *head = &bat_priv->mcast.want_all_rtr4_list;  in batadv_mcast_want_rtr4_update()
1745 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_rtr4_update()
1749 	    orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR4) {  in batadv_mcast_want_rtr4_update()
1750 		atomic_inc(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_want_rtr4_update()
1752 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1754 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_rtr4_update()
1756 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_rtr4_update()
1757 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1760 		   !(orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR4)) {  in batadv_mcast_want_rtr4_update()
1761 		atomic_dec(&bat_priv->mcast.num_want_all_rtr4);  in batadv_mcast_want_rtr4_update()
1763 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1765 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_rtr4_update()
1767 		hlist_del_init_rcu(node);  in batadv_mcast_want_rtr4_update()
1768 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr4_update()
1773  * batadv_mcast_want_rtr6_update() - update want-all-rtr6 counter and list
1774  * @bat_priv: the bat priv with all the mesh interface information
1781  * Caller needs to hold orig->mcast_handler_lock.
1787 	struct hlist_node *node = &orig->mcast_want_all_rtr6_node;  in batadv_mcast_want_rtr6_update()  local
1788 	struct hlist_head *head = &bat_priv->mcast.want_all_rtr6_list;  in batadv_mcast_want_rtr6_update()
1790 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_want_rtr6_update()
1794 	    orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR6) {  in batadv_mcast_want_rtr6_update()
1795 		atomic_inc(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_want_rtr6_update()
1797 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1799 		WARN_ON(!hlist_unhashed(node));  in batadv_mcast_want_rtr6_update()
1801 		hlist_add_head_rcu(node, head);  in batadv_mcast_want_rtr6_update()
1802 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1805 		   !(orig->mcast_flags & BATADV_MCAST_WANT_NO_RTR6)) {  in batadv_mcast_want_rtr6_update()
1806 		atomic_dec(&bat_priv->mcast.num_want_all_rtr6);  in batadv_mcast_want_rtr6_update()
1808 		spin_lock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1810 		WARN_ON(hlist_unhashed(node));  in batadv_mcast_want_rtr6_update()
1812 		hlist_del_init_rcu(node);  in batadv_mcast_want_rtr6_update()
1813 		spin_unlock_bh(&bat_priv->mcast.want_lists_lock);  in batadv_mcast_want_rtr6_update()
1818  * batadv_mcast_have_mc_ptype_update() - update multicast packet type counter
1819  * @bat_priv: the bat priv with all the mesh interface information
1830 	lockdep_assert_held(&orig->mcast_handler_lock);  in batadv_mcast_have_mc_ptype_update()
1834 	    orig->mcast_flags & BATADV_MCAST_HAVE_MC_PTYPE_CAPA)  in batadv_mcast_have_mc_ptype_update()
1835 		atomic_inc(&bat_priv->mcast.num_no_mc_ptype_capa);  in batadv_mcast_have_mc_ptype_update()
1838 		 !(orig->mcast_flags & BATADV_MCAST_HAVE_MC_PTYPE_CAPA))  in batadv_mcast_have_mc_ptype_update()
1839 		atomic_dec(&bat_priv->mcast.num_no_mc_ptype_capa);  in batadv_mcast_have_mc_ptype_update()
1843  * batadv_mcast_tvlv_flags_get() - get multicast flags from an OGM TVLV
1874  * batadv_mcast_tvlv_ogm_handler() - process incoming multicast tvlv container
1875  * @bat_priv: the bat priv with all the mesh interface information
1893 	spin_lock_bh(&orig->mcast_handler_lock);  in batadv_mcast_tvlv_ogm_handler()
1896 	    !test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) {  in batadv_mcast_tvlv_ogm_handler()
1897 		set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities);  in batadv_mcast_tvlv_ogm_handler()
1899 		   test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) {  in batadv_mcast_tvlv_ogm_handler()
1900 		clear_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities);  in batadv_mcast_tvlv_ogm_handler()
1903 	set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capa_initialized);  in batadv_mcast_tvlv_ogm_handler()
1912 	orig->mcast_flags = mcast_flags;  in batadv_mcast_tvlv_ogm_handler()
1913 	spin_unlock_bh(&orig->mcast_handler_lock);  in batadv_mcast_tvlv_ogm_handler()
1917  * batadv_mcast_init() - initialize the multicast optimizations structures
1918  * @bat_priv: the bat priv with all the mesh interface information
1930 	INIT_DELAYED_WORK(&bat_priv->mcast.work, batadv_mcast_mla_update);  in batadv_mcast_init()
1935  * batadv_mcast_mesh_info_put() - put multicast info into a netlink message
1937  * @bat_priv: the bat priv with all the mesh interface information
1944 	u32 flags = bat_priv->mcast.mla_flags.tvlv_flags;  in batadv_mcast_mesh_info_put()
1947 	if (bat_priv->mcast.mla_flags.bridged) {  in batadv_mcast_mesh_info_put()
1950 		if (bat_priv->mcast.mla_flags.querier_ipv4.exists)  in batadv_mcast_mesh_info_put()
1952 		if (bat_priv->mcast.mla_flags.querier_ipv6.exists)  in batadv_mcast_mesh_info_put()
1954 		if (bat_priv->mcast.mla_flags.querier_ipv4.shadowing)  in batadv_mcast_mesh_info_put()
1956 		if (bat_priv->mcast.mla_flags.querier_ipv6.shadowing)  in batadv_mcast_mesh_info_put()
1962 		return -EMSGSIZE;  in batadv_mcast_mesh_info_put()
1968  * batadv_mcast_flags_dump_entry() - dump one entry of the multicast flags table
1984 	hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq,  in batadv_mcast_flags_dump_entry()
1988 		return -ENOBUFS;  in batadv_mcast_flags_dump_entry()
1993 		    orig_node->orig)) {  in batadv_mcast_flags_dump_entry()
1995 		return -EMSGSIZE;  in batadv_mcast_flags_dump_entry()
1999 		     &orig_node->capabilities)) {  in batadv_mcast_flags_dump_entry()
2001 				orig_node->mcast_flags)) {  in batadv_mcast_flags_dump_entry()
2003 			return -EMSGSIZE;  in batadv_mcast_flags_dump_entry()
2012  * batadv_mcast_flags_dump_bucket() - dump one bucket of the multicast flags
2032 	spin_lock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2033 	cb->seq = atomic_read(&hash->generation) << 1 | 1;  in batadv_mcast_flags_dump_bucket()
2035 	hlist_for_each_entry(orig_node, &hash->table[bucket], hash_entry) {  in batadv_mcast_flags_dump_bucket()
2037 			      &orig_node->capa_initialized))  in batadv_mcast_flags_dump_bucket()
2044 			spin_unlock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2047 			return -EMSGSIZE;  in batadv_mcast_flags_dump_bucket()
2053 	spin_unlock_bh(&hash->list_locks[bucket]);  in batadv_mcast_flags_dump_bucket()
2059  * __batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket
2063  * @bat_priv: the bat priv with all the mesh interface information
2074 	struct batadv_hashtable *hash = bat_priv->orig_hash;  in __batadv_mcast_flags_dump()
2078 	while (bucket_tmp < hash->size) {  in __batadv_mcast_flags_dump()
2090 	return msg->len;  in __batadv_mcast_flags_dump()
2094  * batadv_mcast_netlink_get_primary() - get primary interface from netlink
2097  * @primary_if: the primary interface pointer to return the result in
2117 	if (!hard_iface || hard_iface->if_status != BATADV_IF_ACTIVE) {  in batadv_mcast_netlink_get_primary()
2118 		ret = -ENOENT;  in batadv_mcast_netlink_get_primary()
2134  * batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket
2143 	int portid = NETLINK_CB(cb->skb).portid;  in batadv_mcast_flags_dump()
2145 	long *bucket = &cb->args[0];  in batadv_mcast_flags_dump()
2146 	long *idx = &cb->args[1];  in batadv_mcast_flags_dump()
2153 	bat_priv = netdev_priv(primary_if->mesh_iface);  in batadv_mcast_flags_dump()
2161  * batadv_mcast_free() - free the multicast optimizations structures
2162  * @bat_priv: the bat priv with all the mesh interface information
2166 	cancel_delayed_work_sync(&bat_priv->mcast.work);  in batadv_mcast_free()
2177  * batadv_mcast_purge_orig() - reset originator global mcast state modifications
2182 	struct batadv_priv *bat_priv = orig->bat_priv;  in batadv_mcast_purge_orig()
2184 	spin_lock_bh(&orig->mcast_handler_lock);  in batadv_mcast_purge_orig()
2196 	spin_unlock_bh(&orig->mcast_handler_lock);  in batadv_mcast_purge_orig()