1 // SPDX-License-Identifier: GPL-2.0
7 #include "soft-interface.h"
46 #include "distributed-arp-table.h"
48 #include "hard-interface.h"
50 #include "network-coding.h"
52 #include "translation-table.h"
55  * batadv_skb_head_push() - Increase header size and move (push) head pointer
65 	/* TODO: We must check if we can release all references to non-payload  in batadv_skb_head_push()
68 	 * or write any data which is before the current position of skb->data  in batadv_skb_head_push()
93  * batadv_sum_counter() - Sum the cpu-local counters for index 'idx'
95  * @idx: index of counter to sum up
97  * Return: sum of all cpu-local counters
105 		counters = per_cpu_ptr(bat_priv->bat_counters, cpu);  in batadv_sum_counter()
115 	struct net_device_stats *stats = &dev->stats;  in batadv_interface_stats()
117 	stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);  in batadv_interface_stats()
118 	stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);  in batadv_interface_stats()
119 	stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);  in batadv_interface_stats()
120 	stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);  in batadv_interface_stats()
121 	stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);  in batadv_interface_stats()
132 	if (!is_valid_ether_addr(addr->sa_data))  in batadv_interface_set_mac_addr()
133 		return -EADDRNOTAVAIL;  in batadv_interface_set_mac_addr()
135 	ether_addr_copy(old_addr, dev->dev_addr);  in batadv_interface_set_mac_addr()
136 	eth_hw_addr_set(dev, addr->sa_data);  in batadv_interface_set_mac_addr()
139 	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)  in batadv_interface_set_mac_addr()
143 	hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {  in batadv_interface_set_mac_addr()
144 		batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,  in batadv_interface_set_mac_addr()
146 		batadv_tt_local_add(dev, addr->sa_data, vlan->vid,  in batadv_interface_set_mac_addr()
160 		return -EINVAL;  in batadv_interface_change_mtu()
162 	dev->mtu = new_mtu;  in batadv_interface_change_mtu()
163 	bat_priv->mtu_set_by_user = new_mtu;  in batadv_interface_change_mtu()
169  * batadv_interface_set_rx_mode() - set the rx mode of a device
195 	int data_len = skb->len, ret;  in batadv_interface_tx()
206 	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)  in batadv_interface_tx()
210 	memset(skb->cb, 0, sizeof(struct batadv_skb_cb));  in batadv_interface_tx()
218 	proto = ethhdr->h_proto;  in batadv_interface_tx()
225 		proto = vhdr->h_vlan_encapsulated_proto;  in batadv_interface_tx()
227 		/* drop batman-in-batman packets to prevent loops */  in batadv_interface_tx()
243 	/* skb->data might have been reallocated by batadv_bla_tx() */  in batadv_interface_tx()
247 	if (!is_multicast_ether_addr(ethhdr->h_source) &&  in batadv_interface_tx()
248 	    !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) {  in batadv_interface_tx()
249 		client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,  in batadv_interface_tx()
250 						   vid, skb->skb_iif,  in batadv_interface_tx()
251 						   skb->mark);  in batadv_interface_tx()
265 	if (batadv_compare_eth(ethhdr->h_dest, stp_addr))  in batadv_interface_tx()
268 	if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))  in batadv_interface_tx()
271 	gw_mode = atomic_read(&bat_priv->gw.mode);  in batadv_interface_tx()
272 	if (is_multicast_ether_addr(ethhdr->h_dest)) {  in batadv_interface_tx()
281 		/* skb->data may have been modified by  in batadv_interface_tx()
285 		/* if gw_mode is on, broadcast any non-DHCP message.  in batadv_interface_tx()
303 		if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {  in batadv_interface_tx()
338 		bcast_packet = (struct batadv_bcast_packet *)skb->data;  in batadv_interface_tx()
339 		bcast_packet->version = BATADV_COMPAT_VERSION;  in batadv_interface_tx()
340 		bcast_packet->ttl = BATADV_TTL - 1;  in batadv_interface_tx()
343 		bcast_packet->packet_type = BATADV_BCAST;  in batadv_interface_tx()
344 		bcast_packet->reserved = 0;  in batadv_interface_tx()
349 		ether_addr_copy(bcast_packet->orig,  in batadv_interface_tx()
350 				primary_if->net_dev->dev_addr);  in batadv_interface_tx()
353 		seqno = atomic_inc_return(&bat_priv->bcast_seqno);  in batadv_interface_tx()
354 		bcast_packet->seqno = htonl(seqno);  in batadv_interface_tx()
396  * batadv_interface_rx() - receive ethernet frame on local batman-adv interface
399  * @hdr_size: size of already parsed batman-adv header
400  * @orig_node: originator from which the batman-adv packet was sent
403  * skb->data has still point to the batman-adv header with the size @hdr_size.
405  * @hdr_size bytes are still available for pull in @skb.
408  * ethernet frame is invalid or contains again an batman-adv packet. Also
423 	batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;  in batadv_interface_rx()
424 	packet_type = batadv_bcast_packet->packet_type;  in batadv_interface_rx()
429 	/* clean the netfilter state now that the batman-adv header has been  in batadv_interface_rx()
440 	switch (ntohs(ethhdr->h_proto)) {  in batadv_interface_rx()
447 		/* drop batman-in-batman packets to prevent loops */  in batadv_interface_rx()
448 		if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))  in batadv_interface_rx()
456 	/* skb->dev & skb->pkt_type are set here */  in batadv_interface_rx()
457 	skb->protocol = eth_type_trans(skb, soft_iface);  in batadv_interface_rx()
462 			   skb->len + ETH_HLEN);  in batadv_interface_rx()
465 	 * not handle it, we can safely push it up.  in batadv_interface_rx()
472 						     ethhdr->h_source, vid);  in batadv_interface_rx()
474 	if (is_multicast_ether_addr(ethhdr->h_dest)) {  in batadv_interface_rx()
479 		    batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,  in batadv_interface_rx()
481 			/* save bits in skb->mark not covered by the mask and  in batadv_interface_rx()
484 			skb->mark &= ~bat_priv->isolation_mark_mask;  in batadv_interface_rx()
485 			skb->mark |= bat_priv->isolation_mark;  in batadv_interface_rx()
487 	} else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,  in batadv_interface_rx()
488 					 ethhdr->h_dest, vid)) {  in batadv_interface_rx()
502  * batadv_softif_vlan_release() - release vlan from lists and queue for free
512 	spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);  in batadv_softif_vlan_release()
513 	hlist_del_rcu(&vlan->list);  in batadv_softif_vlan_release()
514 	spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);  in batadv_softif_vlan_release()
520  * batadv_softif_vlan_get() - get the vlan object for a specific vid
533 	hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {  in batadv_softif_vlan_get()
534 		if (vlan_tmp->vid != vid)  in batadv_softif_vlan_get()
537 		if (!kref_get_unless_zero(&vlan_tmp->refcount))  in batadv_softif_vlan_get()
549  * batadv_softif_create_vlan() - allocate the needed resources for a new vlan
559 	spin_lock_bh(&bat_priv->softif_vlan_list_lock);  in batadv_softif_create_vlan()
564 		spin_unlock_bh(&bat_priv->softif_vlan_list_lock);  in batadv_softif_create_vlan()
565 		return -EEXIST;  in batadv_softif_create_vlan()
570 		spin_unlock_bh(&bat_priv->softif_vlan_list_lock);  in batadv_softif_create_vlan()
571 		return -ENOMEM;  in batadv_softif_create_vlan()
574 	vlan->bat_priv = bat_priv;  in batadv_softif_create_vlan()
575 	vlan->vid = vid;  in batadv_softif_create_vlan()
576 	kref_init(&vlan->refcount);  in batadv_softif_create_vlan()
578 	atomic_set(&vlan->ap_isolation, 0);  in batadv_softif_create_vlan()
580 	kref_get(&vlan->refcount);  in batadv_softif_create_vlan()
581 	hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);  in batadv_softif_create_vlan()
582 	spin_unlock_bh(&bat_priv->softif_vlan_list_lock);  in batadv_softif_create_vlan()
587 	batadv_tt_local_add(bat_priv->soft_iface,  in batadv_softif_create_vlan()
588 			    bat_priv->soft_iface->dev_addr, vid,  in batadv_softif_create_vlan()
598  * batadv_softif_destroy_vlan() - remove and destroy a softif_vlan object
608 	batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,  in batadv_softif_destroy_vlan()
609 			       vlan->vid, "vlan interface destroyed", false);  in batadv_softif_destroy_vlan()
615  * batadv_interface_add_vid() - ndo_add_vid API implementation
620  * Set up all the internal structures for handling the new vlan on top of the
632 	 * batman-adv does not know how to handle other types  in batadv_interface_add_vid()
635 		return -EINVAL;  in batadv_interface_add_vid()
653 	batadv_tt_local_add(bat_priv->soft_iface,  in batadv_interface_add_vid()
654 			    bat_priv->soft_iface->dev_addr, vid,  in batadv_interface_add_vid()
661  * batadv_interface_kill_vid() - ndo_kill_vid API implementation
669  * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
670  * or -ENOENT if the specified vlan id wasn't registered.
678 	/* only 802.1Q vlans are supported. batman-adv does not know how to  in batadv_interface_kill_vid()
682 		return -EINVAL;  in batadv_interface_kill_vid()
686 		return -ENOENT;  in batadv_interface_kill_vid()
696 /* batman-adv network devices have devices nesting below it and are a special
704  * batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue
713 	lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);  in batadv_set_lockdep_class_one()
717  * batadv_set_lockdep_class() - Set txq and addr_list lockdep class
722 	lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);  in batadv_set_lockdep_class()
727  * batadv_softif_init_late() - late stage initialization of soft interface
742 	bat_priv->soft_iface = dev;  in batadv_softif_init_late()
747 	bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64));  in batadv_softif_init_late()
748 	if (!bat_priv->bat_counters)  in batadv_softif_init_late()
749 		return -ENOMEM;  in batadv_softif_init_late()
751 	atomic_set(&bat_priv->aggregated_ogms, 1);  in batadv_softif_init_late()
752 	atomic_set(&bat_priv->bonding, 0);  in batadv_softif_init_late()
754 	atomic_set(&bat_priv->bridge_loop_avoidance, 1);  in batadv_softif_init_late()
757 	atomic_set(&bat_priv->distributed_arp_table, 1);  in batadv_softif_init_late()
760 	atomic_set(&bat_priv->multicast_mode, 1);  in batadv_softif_init_late()
761 	atomic_set(&bat_priv->multicast_fanout, 16);  in batadv_softif_init_late()
762 	atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);  in batadv_softif_init_late()
763 	atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);  in batadv_softif_init_late()
764 	atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);  in batadv_softif_init_late()
766 	atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF);  in batadv_softif_init_late()
767 	atomic_set(&bat_priv->gw.bandwidth_down, 100);  in batadv_softif_init_late()
768 	atomic_set(&bat_priv->gw.bandwidth_up, 20);  in batadv_softif_init_late()
769 	atomic_set(&bat_priv->orig_interval, 1000);  in batadv_softif_init_late()
770 	atomic_set(&bat_priv->hop_penalty, 30);  in batadv_softif_init_late()
772 	atomic_set(&bat_priv->log_level, 0);  in batadv_softif_init_late()
774 	atomic_set(&bat_priv->fragmentation, 1);  in batadv_softif_init_late()
775 	atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);  in batadv_softif_init_late()
776 	atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);  in batadv_softif_init_late()
777 	atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);  in batadv_softif_init_late()
779 	atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);  in batadv_softif_init_late()
780 	atomic_set(&bat_priv->bcast_seqno, 1);  in batadv_softif_init_late()
781 	atomic_set(&bat_priv->tt.vn, 0);  in batadv_softif_init_late()
782 	atomic_set(&bat_priv->tt.local_changes, 0);  in batadv_softif_init_late()
783 	atomic_set(&bat_priv->tt.ogm_append_cnt, 0);  in batadv_softif_init_late()
785 	atomic_set(&bat_priv->bla.num_requests, 0);  in batadv_softif_init_late()
787 	atomic_set(&bat_priv->tp_num, 0);  in batadv_softif_init_late()
789 	bat_priv->tt.last_changeset = NULL;  in batadv_softif_init_late()
790 	bat_priv->tt.last_changeset_len = 0;  in batadv_softif_init_late()
791 	bat_priv->isolation_mark = 0;  in batadv_softif_init_late()
792 	bat_priv->isolation_mark_mask = 0;  in batadv_softif_init_late()
796 	atomic_set(&bat_priv->frag_seqno, random_seqno);  in batadv_softif_init_late()
798 	bat_priv->primary_if = NULL;  in batadv_softif_init_late()
802 	if (!bat_priv->algo_ops) {  in batadv_softif_init_late()
815 	free_percpu(bat_priv->bat_counters);  in batadv_softif_init_late()
816 	bat_priv->bat_counters = NULL;  in batadv_softif_init_late()
822  * batadv_softif_slave_add() - Add a slave interface to a batadv_soft_interface
834 	int ret = -EINVAL;  in batadv_softif_slave_add()
837 	if (!hard_iface || hard_iface->soft_iface)  in batadv_softif_slave_add()
848  * batadv_softif_slave_del() - Delete a slave iface from a batadv_soft_interface
858 	int ret = -EINVAL;  in batadv_softif_slave_del()
862 	if (!hard_iface || hard_iface->soft_iface != dev)  in batadv_softif_slave_del()
892 	strscpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));  in batadv_get_drvinfo()
893 	strscpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));  in batadv_get_drvinfo()
894 	strscpy(info->fw_version, "N/A", sizeof(info->fw_version));  in batadv_get_drvinfo()
895 	strscpy(info->bus_info, "batman", sizeof(info->bus_info));  in batadv_get_drvinfo()
970 	return -EOPNOTSUPP;  in batadv_get_sset_count()
982  * batadv_softif_free() - Deconstructor of batadv_soft_interface
997  * batadv_softif_init_early() - early stage initialization of soft interface
1004 	dev->netdev_ops = &batadv_netdev_ops;  in batadv_softif_init_early()
1005 	dev->needs_free_netdev = true;  in batadv_softif_init_early()
1006 	dev->priv_destructor = batadv_softif_free;  in batadv_softif_init_early()
1007 	dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;  in batadv_softif_init_early()
1008 	dev->features |= NETIF_F_LLTX;  in batadv_softif_init_early()
1009 	dev->priv_flags |= IFF_NO_QUEUE;  in batadv_softif_init_early()
1014 	dev->mtu = ETH_DATA_LEN;  in batadv_softif_init_early()
1019 	dev->ethtool_ops = &batadv_ethtool_ops;  in batadv_softif_init_early()
1023  * batadv_softif_validate() - validate configuration of new batadv link
1041 			return -EINVAL;  in batadv_softif_validate()
1048  * batadv_softif_newlink() - pre-initialize and register new batadv link
1069 			return -EINVAL;  in batadv_softif_newlink()
1076  * batadv_softif_destroy_netlink() - deletion of batadv_soft_interface via
1078  * @soft_iface: the to-be-removed batman-adv interface
1089 		if (hard_iface->soft_iface == soft_iface)  in batadv_softif_destroy_netlink()
1104  * batadv_softif_is_valid() - Check whether device is a batadv soft interface
1107  * Return: true when net_dev is a batman-adv interface, false otherwise
1111 	if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)  in batadv_softif_is_valid()