1 /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include "soft-interface.h"
22 #include "hard-interface.h"
23 #include "distributed-arp-table.h"
27 #include "translation-table.h"
29 #include "gateway_common.h"
30 #include "gateway_client.h"
32 #include "originator.h"
33 #include <linux/slab.h>
34 #include <linux/ethtool.h>
35 #include <linux/etherdevice.h>
36 #include <linux/if_vlan.h>
37 #include "bridge_loop_avoidance.h"
38 #include "network-coding.h"
41 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
42 static void batadv_get_drvinfo(struct net_device *dev,
43 struct ethtool_drvinfo *info);
44 static u32 batadv_get_msglevel(struct net_device *dev);
45 static void batadv_set_msglevel(struct net_device *dev, u32 value);
46 static u32 batadv_get_link(struct net_device *dev);
47 static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
48 static void batadv_get_ethtool_stats(struct net_device *dev,
49 struct ethtool_stats *stats, u64 *data);
50 static int batadv_get_sset_count(struct net_device *dev, int stringset);
52 static const struct ethtool_ops batadv_ethtool_ops = {
53 .get_settings = batadv_get_settings,
54 .get_drvinfo = batadv_get_drvinfo,
55 .get_msglevel = batadv_get_msglevel,
56 .set_msglevel = batadv_set_msglevel,
57 .get_link = batadv_get_link,
58 .get_strings = batadv_get_strings,
59 .get_ethtool_stats = batadv_get_ethtool_stats,
60 .get_sset_count = batadv_get_sset_count,
63 int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
67 /* TODO: We must check if we can release all references to non-payload
68 * data using skb_header_release in our skbs to allow skb_cow_header to
69 * work optimally. This means that those skbs are not allowed to read
70 * or write any data which is before the current position of skb->data
71 * after that call and thus allow other skbs with the same data buffer
72 * to write freely in that area.
74 result = skb_cow_head(skb, len);
82 static int batadv_interface_open(struct net_device *dev)
84 netif_start_queue(dev);
88 static int batadv_interface_release(struct net_device *dev)
90 netif_stop_queue(dev);
94 static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
96 struct batadv_priv *bat_priv = netdev_priv(dev);
97 struct net_device_stats *stats = &bat_priv->stats;
99 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
100 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
101 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
102 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
103 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
107 static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
109 struct batadv_priv *bat_priv = netdev_priv(dev);
110 struct sockaddr *addr = p;
111 uint8_t old_addr[ETH_ALEN];
113 if (!is_valid_ether_addr(addr->sa_data))
114 return -EADDRNOTAVAIL;
116 memcpy(old_addr, dev->dev_addr, ETH_ALEN);
117 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
119 /* only modify transtable if it has been initialized before */
120 if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
121 batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
122 "mac address changed", false);
123 batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
124 BATADV_NULL_IFINDEX);
130 static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
133 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
142 * batadv_interface_set_rx_mode - set the rx mode of a device
143 * @dev: registered network device to modify
145 * We do not actually need to set any rx filters for the virtual batman
146 * soft interface. However a dummy handler enables a user to set static
147 * multicast listeners for instance.
149 static void batadv_interface_set_rx_mode(struct net_device *dev)
153 static int batadv_interface_tx(struct sk_buff *skb,
154 struct net_device *soft_iface)
156 struct ethhdr *ethhdr;
157 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
158 struct batadv_hard_iface *primary_if = NULL;
159 struct batadv_bcast_packet *bcast_packet;
160 __be16 ethertype = htons(ETH_P_BATMAN);
161 static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
163 static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
165 struct vlan_ethhdr *vhdr;
166 unsigned int header_len = 0;
167 int data_len = skb->len, ret;
168 unsigned long brd_delay = 1;
169 bool do_bcast = false, client_added;
173 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
176 soft_iface->trans_start = jiffies;
177 vid = batadv_get_vid(skb, 0);
178 ethhdr = (struct ethhdr *)skb->data;
180 switch (ntohs(ethhdr->h_proto)) {
182 vhdr = (struct vlan_ethhdr *)skb->data;
184 if (vhdr->h_vlan_encapsulated_proto != ethertype)
192 if (batadv_bla_tx(bat_priv, skb, vid))
195 /* skb->data might have been reallocated by batadv_bla_tx() */
196 ethhdr = (struct ethhdr *)skb->data;
198 /* Register the client MAC in the transtable */
199 if (!is_multicast_ether_addr(ethhdr->h_source)) {
200 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
206 /* don't accept stp packets. STP does not help in meshes.
207 * better use the bridge loop avoidance ...
209 * The same goes for ECTP sent at least by some Cisco Switches,
210 * it might confuse the mesh when used with bridge loop avoidance.
212 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
215 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
218 if (is_multicast_ether_addr(ethhdr->h_dest)) {
221 switch (atomic_read(&bat_priv->gw_mode)) {
222 case BATADV_GW_MODE_SERVER:
223 /* gateway servers should not send dhcp
224 * requests into the mesh
226 ret = batadv_gw_is_dhcp_target(skb, &header_len);
230 case BATADV_GW_MODE_CLIENT:
231 /* gateway clients should send dhcp requests
232 * via unicast to their gateway
234 ret = batadv_gw_is_dhcp_target(skb, &header_len);
238 case BATADV_GW_MODE_OFF:
243 /* reminder: ethhdr might have become unusable from here on
244 * (batadv_gw_is_dhcp_target() might have reallocated skb data)
248 batadv_skb_set_priority(skb, 0);
250 /* ethernet packet should be broadcasted */
252 primary_if = batadv_primary_if_get_selected(bat_priv);
256 /* in case of ARP request, we do not immediately broadcasti the
257 * packet, instead we first wait for DAT to try to retrieve the
260 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
261 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
263 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
266 bcast_packet = (struct batadv_bcast_packet *)skb->data;
267 bcast_packet->header.version = BATADV_COMPAT_VERSION;
268 bcast_packet->header.ttl = BATADV_TTL;
270 /* batman packet type: broadcast */
271 bcast_packet->header.packet_type = BATADV_BCAST;
272 bcast_packet->reserved = 0;
274 /* hw address of first interface is the orig mac because only
275 * this mac is known throughout the mesh
277 memcpy(bcast_packet->orig,
278 primary_if->net_dev->dev_addr, ETH_ALEN);
280 /* set broadcast sequence number */
281 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
282 bcast_packet->seqno = htonl(seqno);
284 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
286 /* a copy is stored in the bcast list, therefore removing
293 if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) {
294 ret = batadv_gw_out_of_range(bat_priv, skb);
299 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
302 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
304 if (is_multicast_ether_addr(ethhdr->h_dest))
305 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
307 ret = batadv_send_skb_via_tt(bat_priv, skb, vid);
309 if (ret == NET_XMIT_DROP)
313 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
314 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
320 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
323 batadv_hardif_free_ref(primary_if);
327 void batadv_interface_rx(struct net_device *soft_iface,
328 struct sk_buff *skb, struct batadv_hard_iface *recv_if,
329 int hdr_size, struct batadv_orig_node *orig_node)
331 struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
332 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
333 __be16 ethertype = htons(ETH_P_BATMAN);
334 struct vlan_ethhdr *vhdr;
335 struct ethhdr *ethhdr;
339 is_bcast = (batadv_header->packet_type == BATADV_BCAST);
341 /* check if enough space is available for pulling, and pull */
342 if (!pskb_may_pull(skb, hdr_size))
345 skb_pull_rcsum(skb, hdr_size);
346 skb_reset_mac_header(skb);
348 vid = batadv_get_vid(skb, hdr_size);
349 ethhdr = eth_hdr(skb);
351 switch (ntohs(ethhdr->h_proto)) {
353 vhdr = (struct vlan_ethhdr *)skb->data;
355 if (vhdr->h_vlan_encapsulated_proto != ethertype)
363 /* skb->dev & skb->pkt_type are set here */
364 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
366 skb->protocol = eth_type_trans(skb, soft_iface);
368 /* should not be necessary anymore as we use skb_pull_rcsum()
369 * TODO: please verify this and remove this TODO
370 * -- Dec 21st 2009, Simon Wunderlich
373 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
375 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
376 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
377 skb->len + ETH_HLEN);
379 soft_iface->last_rx = jiffies;
381 /* Let the bridge loop avoidance check the packet. If will
382 * not handle it, we can safely push it up.
384 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
388 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
389 ethhdr->h_source, vid);
391 if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest,
405 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
407 * @softif_vlan: the vlan object to release
409 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *softif_vlan)
411 if (atomic_dec_and_test(&softif_vlan->refcount))
412 kfree_rcu(softif_vlan, rcu);
416 * batadv_softif_vlan_get - get the vlan object for a specific vid
417 * @bat_priv: the bat priv with all the soft interface information
418 * @vid: the identifier of the vlan object to retrieve
420 * Returns the private data of the vlan matching the vid passed as argument or
421 * NULL otherwise. The refcounter of the returned object is incremented by 1.
423 struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
426 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
429 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
430 if (vlan_tmp->vid != vid)
433 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
445 * batadv_create_vlan - allocate the needed resources for a new vlan
446 * @bat_priv: the bat priv with all the soft interface information
447 * @vid: the VLAN identifier
449 * Returns 0 on success, a negative error otherwise.
451 int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
453 struct batadv_softif_vlan *vlan;
456 vlan = batadv_softif_vlan_get(bat_priv, vid);
458 batadv_softif_vlan_free_ref(vlan);
462 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
467 atomic_set(&vlan->refcount, 1);
469 atomic_set(&vlan->ap_isolation, 0);
471 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
477 /* add a new TT local entry. This one will be marked with the NOPURGE
480 batadv_tt_local_add(bat_priv->soft_iface,
481 bat_priv->soft_iface->dev_addr, vid,
482 BATADV_NULL_IFINDEX);
484 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
485 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
486 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
492 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
493 * @bat_priv: the bat priv with all the soft interface information
494 * @vlan: the object to remove
496 static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
497 struct batadv_softif_vlan *vlan)
499 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
500 hlist_del_rcu(&vlan->list);
501 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
503 batadv_sysfs_del_vlan(bat_priv, vlan);
505 /* explicitly remove the associated TT local entry because it is marked
506 * with the NOPURGE flag
508 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
509 vlan->vid, "vlan interface destroyed", false);
511 batadv_softif_vlan_free_ref(vlan);
515 * batadv_interface_add_vid - ndo_add_vid API implementation
516 * @dev: the netdev of the mesh interface
517 * @vid: identifier of the new vlan
519 * Set up all the internal structures for handling the new vlan on top of the
522 * Returns 0 on success or a negative error code in case of failure.
524 static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
527 struct batadv_priv *bat_priv = netdev_priv(dev);
529 /* only 802.1Q vlans are supported.
530 * batman-adv does not know how to handle other types
532 if (proto != htons(ETH_P_8021Q))
535 vid |= BATADV_VLAN_HAS_TAG;
537 return batadv_softif_create_vlan(bat_priv, vid);
541 * batadv_interface_kill_vid - ndo_kill_vid API implementation
542 * @dev: the netdev of the mesh interface
543 * @vid: identifier of the deleted vlan
545 * Destroy all the internal structures used to handle the vlan identified by vid
546 * on top of the mesh interface
548 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
549 * or -ENOENT if the specified vlan id wasn't registered.
551 static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
554 struct batadv_priv *bat_priv = netdev_priv(dev);
555 struct batadv_softif_vlan *vlan;
557 /* only 802.1Q vlans are supported. batman-adv does not know how to
560 if (proto != htons(ETH_P_8021Q))
563 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
567 batadv_softif_destroy_vlan(bat_priv, vlan);
569 /* finally free the vlan object */
570 batadv_softif_vlan_free_ref(vlan);
575 /* batman-adv network devices have devices nesting below it and are a special
576 * "super class" of normal network devices; split their locks off into a
577 * separate class since they always nest.
579 static struct lock_class_key batadv_netdev_xmit_lock_key;
580 static struct lock_class_key batadv_netdev_addr_lock_key;
583 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
584 * @dev: device which owns the tx queue
585 * @txq: tx queue to modify
586 * @_unused: always NULL
588 static void batadv_set_lockdep_class_one(struct net_device *dev,
589 struct netdev_queue *txq,
592 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
596 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
597 * @dev: network device to modify
599 static void batadv_set_lockdep_class(struct net_device *dev)
601 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
602 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
606 * batadv_softif_destroy_finish - cleans up the remains of a softif
607 * @work: work queue item
609 * Free the parts of the soft interface which can not be removed under
610 * rtnl lock (to prevent deadlock situations).
612 static void batadv_softif_destroy_finish(struct work_struct *work)
614 struct batadv_softif_vlan *vlan;
615 struct batadv_priv *bat_priv;
616 struct net_device *soft_iface;
618 bat_priv = container_of(work, struct batadv_priv,
620 soft_iface = bat_priv->soft_iface;
622 /* destroy the "untagged" VLAN */
623 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
625 batadv_softif_destroy_vlan(bat_priv, vlan);
626 batadv_softif_vlan_free_ref(vlan);
629 batadv_sysfs_del_meshif(soft_iface);
632 unregister_netdevice(soft_iface);
637 * batadv_softif_init_late - late stage initialization of soft interface
638 * @dev: registered network device to modify
640 * Returns error code on failures
642 static int batadv_softif_init_late(struct net_device *dev)
644 struct batadv_priv *bat_priv;
645 uint32_t random_seqno;
647 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
649 batadv_set_lockdep_class(dev);
651 bat_priv = netdev_priv(dev);
652 bat_priv->soft_iface = dev;
653 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
655 /* batadv_interface_stats() needs to be available as soon as
656 * register_netdevice() has been called
658 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
659 if (!bat_priv->bat_counters)
662 atomic_set(&bat_priv->aggregated_ogms, 1);
663 atomic_set(&bat_priv->bonding, 0);
664 #ifdef CONFIG_BATMAN_ADV_BLA
665 atomic_set(&bat_priv->bridge_loop_avoidance, 0);
667 #ifdef CONFIG_BATMAN_ADV_DAT
668 atomic_set(&bat_priv->distributed_arp_table, 1);
670 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
671 atomic_set(&bat_priv->gw_sel_class, 20);
672 atomic_set(&bat_priv->gw.bandwidth_down, 100);
673 atomic_set(&bat_priv->gw.bandwidth_up, 20);
674 atomic_set(&bat_priv->orig_interval, 1000);
675 atomic_set(&bat_priv->hop_penalty, 30);
676 #ifdef CONFIG_BATMAN_ADV_DEBUG
677 atomic_set(&bat_priv->log_level, 0);
679 atomic_set(&bat_priv->fragmentation, 1);
680 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
681 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
682 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
684 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
685 atomic_set(&bat_priv->bcast_seqno, 1);
686 atomic_set(&bat_priv->tt.vn, 0);
687 atomic_set(&bat_priv->tt.local_changes, 0);
688 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
689 #ifdef CONFIG_BATMAN_ADV_BLA
690 atomic_set(&bat_priv->bla.num_requests, 0);
692 bat_priv->tt.last_changeset = NULL;
693 bat_priv->tt.last_changeset_len = 0;
695 /* randomize initial seqno to avoid collision */
696 get_random_bytes(&random_seqno, sizeof(random_seqno));
697 atomic_set(&bat_priv->frag_seqno, random_seqno);
699 bat_priv->primary_if = NULL;
700 bat_priv->num_ifaces = 0;
702 batadv_nc_init_bat_priv(bat_priv);
704 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
706 goto free_bat_counters;
708 ret = batadv_debugfs_add_meshif(dev);
710 goto free_bat_counters;
712 ret = batadv_mesh_init(dev);
719 batadv_debugfs_del_meshif(dev);
721 free_percpu(bat_priv->bat_counters);
722 bat_priv->bat_counters = NULL;
728 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
729 * @dev: batadv_soft_interface used as master interface
730 * @slave_dev: net_device which should become the slave interface
732 * Return 0 if successful or error otherwise.
734 static int batadv_softif_slave_add(struct net_device *dev,
735 struct net_device *slave_dev)
737 struct batadv_hard_iface *hard_iface;
740 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
741 if (!hard_iface || hard_iface->soft_iface != NULL)
744 ret = batadv_hardif_enable_interface(hard_iface, dev->name);
748 batadv_hardif_free_ref(hard_iface);
753 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
754 * @dev: batadv_soft_interface used as master interface
755 * @slave_dev: net_device which should be removed from the master interface
757 * Return 0 if successful or error otherwise.
759 static int batadv_softif_slave_del(struct net_device *dev,
760 struct net_device *slave_dev)
762 struct batadv_hard_iface *hard_iface;
765 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
767 if (!hard_iface || hard_iface->soft_iface != dev)
770 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
775 batadv_hardif_free_ref(hard_iface);
779 static const struct net_device_ops batadv_netdev_ops = {
780 .ndo_init = batadv_softif_init_late,
781 .ndo_open = batadv_interface_open,
782 .ndo_stop = batadv_interface_release,
783 .ndo_get_stats = batadv_interface_stats,
784 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
785 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
786 .ndo_set_mac_address = batadv_interface_set_mac_addr,
787 .ndo_change_mtu = batadv_interface_change_mtu,
788 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
789 .ndo_start_xmit = batadv_interface_tx,
790 .ndo_validate_addr = eth_validate_addr,
791 .ndo_add_slave = batadv_softif_slave_add,
792 .ndo_del_slave = batadv_softif_slave_del,
796 * batadv_softif_free - Deconstructor of batadv_soft_interface
797 * @dev: Device to cleanup and remove
799 static void batadv_softif_free(struct net_device *dev)
801 batadv_debugfs_del_meshif(dev);
802 batadv_mesh_free(dev);
804 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
805 * their tasks. Wait for them all to be finished before freeing the
806 * netdev and its private data (bat_priv)
814 * batadv_softif_init_early - early stage initialization of soft interface
815 * @dev: registered network device to modify
817 static void batadv_softif_init_early(struct net_device *dev)
819 struct batadv_priv *priv = netdev_priv(dev);
823 dev->netdev_ops = &batadv_netdev_ops;
824 dev->destructor = batadv_softif_free;
825 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
826 dev->tx_queue_len = 0;
828 /* can't call min_mtu, because the needed variables
829 * have not been initialized yet
831 dev->mtu = ETH_DATA_LEN;
832 /* reserve more space in the skbuff for our header */
833 dev->hard_header_len = batadv_max_header_len();
835 /* generate random address */
836 eth_hw_addr_random(dev);
838 SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
840 memset(priv, 0, sizeof(*priv));
843 struct net_device *batadv_softif_create(const char *name)
845 struct net_device *soft_iface;
848 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
849 batadv_softif_init_early);
853 soft_iface->rtnl_link_ops = &batadv_link_ops;
855 ret = register_netdevice(soft_iface);
857 pr_err("Unable to register the batman interface '%s': %i\n",
859 free_netdev(soft_iface);
867 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
868 * @soft_iface: the to-be-removed batman-adv interface
870 void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
872 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
874 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
878 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
879 * @soft_iface: the to-be-removed batman-adv interface
880 * @head: list pointer
882 static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
883 struct list_head *head)
885 struct batadv_hard_iface *hard_iface;
887 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
888 if (hard_iface->soft_iface == soft_iface)
889 batadv_hardif_disable_interface(hard_iface,
890 BATADV_IF_CLEANUP_KEEP);
893 batadv_sysfs_del_meshif(soft_iface);
894 unregister_netdevice_queue(soft_iface, head);
897 int batadv_softif_is_valid(const struct net_device *net_dev)
899 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
905 struct rtnl_link_ops batadv_link_ops __read_mostly = {
907 .priv_size = sizeof(struct batadv_priv),
908 .setup = batadv_softif_init_early,
909 .dellink = batadv_softif_destroy_netlink,
913 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
916 cmd->advertising = 0;
917 ethtool_cmd_speed_set(cmd, SPEED_10);
918 cmd->duplex = DUPLEX_FULL;
920 cmd->phy_address = 0;
921 cmd->transceiver = XCVR_INTERNAL;
922 cmd->autoneg = AUTONEG_DISABLE;
929 static void batadv_get_drvinfo(struct net_device *dev,
930 struct ethtool_drvinfo *info)
932 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
933 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
934 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
935 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
938 static u32 batadv_get_msglevel(struct net_device *dev)
943 static void batadv_set_msglevel(struct net_device *dev, u32 value)
947 static u32 batadv_get_link(struct net_device *dev)
952 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
953 * Declare each description string in struct.name[] to get fixed sized buffer
954 * and compile time checking for strings longer than ETH_GSTRING_LEN.
956 static const struct {
957 const char name[ETH_GSTRING_LEN];
958 } batadv_counters_strings[] = {
975 { "frag_fwd_bytes" },
978 { "tt_response_tx" },
979 { "tt_response_rx" },
980 { "tt_roam_adv_tx" },
981 { "tt_roam_adv_rx" },
982 #ifdef CONFIG_BATMAN_ADV_DAT
987 { "dat_cached_reply_tx" },
989 #ifdef CONFIG_BATMAN_ADV_NC
993 { "nc_recode_bytes" },
996 { "nc_decode_bytes" },
997 { "nc_decode_failed" },
1002 static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
1005 if (stringset == ETH_SS_STATS)
1006 memcpy(data, batadv_counters_strings,
1007 sizeof(batadv_counters_strings));
1010 static void batadv_get_ethtool_stats(struct net_device *dev,
1011 struct ethtool_stats *stats,
1014 struct batadv_priv *bat_priv = netdev_priv(dev);
1017 for (i = 0; i < BATADV_CNT_NUM; i++)
1018 data[i] = batadv_sum_counter(bat_priv, i);
1021 static int batadv_get_sset_count(struct net_device *dev, int stringset)
1023 if (stringset == ETH_SS_STATS)
1024 return BATADV_CNT_NUM;