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;
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 batadv_tt_local_add(soft_iface, ethhdr->h_source, vid,
203 /* don't accept stp packets. STP does not help in meshes.
204 * better use the bridge loop avoidance ...
206 * The same goes for ECTP sent at least by some Cisco Switches,
207 * it might confuse the mesh when used with bridge loop avoidance.
209 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
212 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
215 if (is_multicast_ether_addr(ethhdr->h_dest)) {
218 switch (atomic_read(&bat_priv->gw_mode)) {
219 case BATADV_GW_MODE_SERVER:
220 /* gateway servers should not send dhcp
221 * requests into the mesh
223 ret = batadv_gw_is_dhcp_target(skb, &header_len);
227 case BATADV_GW_MODE_CLIENT:
228 /* gateway clients should send dhcp requests
229 * via unicast to their gateway
231 ret = batadv_gw_is_dhcp_target(skb, &header_len);
235 case BATADV_GW_MODE_OFF:
240 /* reminder: ethhdr might have become unusable from here on
241 * (batadv_gw_is_dhcp_target() might have reallocated skb data)
245 batadv_skb_set_priority(skb, 0);
247 /* ethernet packet should be broadcasted */
249 primary_if = batadv_primary_if_get_selected(bat_priv);
253 /* in case of ARP request, we do not immediately broadcasti the
254 * packet, instead we first wait for DAT to try to retrieve the
257 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
258 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
260 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
263 bcast_packet = (struct batadv_bcast_packet *)skb->data;
264 bcast_packet->header.version = BATADV_COMPAT_VERSION;
265 bcast_packet->header.ttl = BATADV_TTL;
267 /* batman packet type: broadcast */
268 bcast_packet->header.packet_type = BATADV_BCAST;
269 bcast_packet->reserved = 0;
271 /* hw address of first interface is the orig mac because only
272 * this mac is known throughout the mesh
274 memcpy(bcast_packet->orig,
275 primary_if->net_dev->dev_addr, ETH_ALEN);
277 /* set broadcast sequence number */
278 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
279 bcast_packet->seqno = htonl(seqno);
281 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
283 /* a copy is stored in the bcast list, therefore removing
290 if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) {
291 ret = batadv_gw_out_of_range(bat_priv, skb);
296 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
299 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
301 if (is_multicast_ether_addr(ethhdr->h_dest))
302 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
304 ret = batadv_send_skb_via_tt(bat_priv, skb, vid);
306 if (ret == NET_XMIT_DROP)
310 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
311 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
317 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
320 batadv_hardif_free_ref(primary_if);
324 void batadv_interface_rx(struct net_device *soft_iface,
325 struct sk_buff *skb, struct batadv_hard_iface *recv_if,
326 int hdr_size, struct batadv_orig_node *orig_node)
328 struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
329 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
330 __be16 ethertype = htons(ETH_P_BATMAN);
331 struct vlan_ethhdr *vhdr;
332 struct ethhdr *ethhdr;
336 is_bcast = (batadv_header->packet_type == BATADV_BCAST);
338 /* check if enough space is available for pulling, and pull */
339 if (!pskb_may_pull(skb, hdr_size))
342 skb_pull_rcsum(skb, hdr_size);
343 skb_reset_mac_header(skb);
345 vid = batadv_get_vid(skb, hdr_size);
346 ethhdr = eth_hdr(skb);
348 switch (ntohs(ethhdr->h_proto)) {
350 vhdr = (struct vlan_ethhdr *)skb->data;
352 if (vhdr->h_vlan_encapsulated_proto != ethertype)
360 /* skb->dev & skb->pkt_type are set here */
361 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
363 skb->protocol = eth_type_trans(skb, soft_iface);
365 /* should not be necessary anymore as we use skb_pull_rcsum()
366 * TODO: please verify this and remove this TODO
367 * -- Dec 21st 2009, Simon Wunderlich
370 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
372 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
373 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
374 skb->len + ETH_HLEN);
376 soft_iface->last_rx = jiffies;
378 /* Let the bridge loop avoidance check the packet. If will
379 * not handle it, we can safely push it up.
381 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
385 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
386 ethhdr->h_source, vid);
388 if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest,
402 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
404 * @softif_vlan: the vlan object to release
406 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *softif_vlan)
408 if (atomic_dec_and_test(&softif_vlan->refcount))
409 kfree_rcu(softif_vlan, rcu);
413 * batadv_softif_vlan_get - get the vlan object for a specific vid
414 * @bat_priv: the bat priv with all the soft interface information
415 * @vid: the identifier of the vlan object to retrieve
417 * Returns the private data of the vlan matching the vid passed as argument or
418 * NULL otherwise. The refcounter of the returned object is incremented by 1.
420 struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
423 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
426 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
427 if (vlan_tmp->vid != vid)
430 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
442 * batadv_create_vlan - allocate the needed resources for a new vlan
443 * @bat_priv: the bat priv with all the soft interface information
444 * @vid: the VLAN identifier
446 * Returns 0 on success, a negative error otherwise.
448 int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
450 struct batadv_softif_vlan *vlan;
453 vlan = batadv_softif_vlan_get(bat_priv, vid);
455 batadv_softif_vlan_free_ref(vlan);
459 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
464 atomic_set(&vlan->refcount, 1);
466 atomic_set(&vlan->ap_isolation, 0);
468 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
474 /* add a new TT local entry. This one will be marked with the NOPURGE
477 batadv_tt_local_add(bat_priv->soft_iface,
478 bat_priv->soft_iface->dev_addr, vid,
479 BATADV_NULL_IFINDEX);
481 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
482 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
483 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
489 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
490 * @bat_priv: the bat priv with all the soft interface information
491 * @vlan: the object to remove
493 static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
494 struct batadv_softif_vlan *vlan)
496 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
497 hlist_del_rcu(&vlan->list);
498 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
500 batadv_sysfs_del_vlan(bat_priv, vlan);
502 /* explicitly remove the associated TT local entry because it is marked
503 * with the NOPURGE flag
505 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
506 vlan->vid, "vlan interface destroyed", false);
508 batadv_softif_vlan_free_ref(vlan);
512 * batadv_interface_add_vid - ndo_add_vid API implementation
513 * @dev: the netdev of the mesh interface
514 * @vid: identifier of the new vlan
516 * Set up all the internal structures for handling the new vlan on top of the
519 * Returns 0 on success or a negative error code in case of failure.
521 static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
524 struct batadv_priv *bat_priv = netdev_priv(dev);
526 /* only 802.1Q vlans are supported.
527 * batman-adv does not know how to handle other types
529 if (proto != htons(ETH_P_8021Q))
532 vid |= BATADV_VLAN_HAS_TAG;
534 return batadv_softif_create_vlan(bat_priv, vid);
538 * batadv_interface_kill_vid - ndo_kill_vid API implementation
539 * @dev: the netdev of the mesh interface
540 * @vid: identifier of the deleted vlan
542 * Destroy all the internal structures used to handle the vlan identified by vid
543 * on top of the mesh interface
545 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
546 * or -ENOENT if the specified vlan id wasn't registered.
548 static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
551 struct batadv_priv *bat_priv = netdev_priv(dev);
552 struct batadv_softif_vlan *vlan;
554 /* only 802.1Q vlans are supported. batman-adv does not know how to
557 if (proto != htons(ETH_P_8021Q))
560 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
564 batadv_softif_destroy_vlan(bat_priv, vlan);
566 /* finally free the vlan object */
567 batadv_softif_vlan_free_ref(vlan);
572 /* batman-adv network devices have devices nesting below it and are a special
573 * "super class" of normal network devices; split their locks off into a
574 * separate class since they always nest.
576 static struct lock_class_key batadv_netdev_xmit_lock_key;
577 static struct lock_class_key batadv_netdev_addr_lock_key;
580 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
581 * @dev: device which owns the tx queue
582 * @txq: tx queue to modify
583 * @_unused: always NULL
585 static void batadv_set_lockdep_class_one(struct net_device *dev,
586 struct netdev_queue *txq,
589 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
593 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
594 * @dev: network device to modify
596 static void batadv_set_lockdep_class(struct net_device *dev)
598 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
599 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
603 * batadv_softif_destroy_finish - cleans up the remains of a softif
604 * @work: work queue item
606 * Free the parts of the soft interface which can not be removed under
607 * rtnl lock (to prevent deadlock situations).
609 static void batadv_softif_destroy_finish(struct work_struct *work)
611 struct batadv_softif_vlan *vlan;
612 struct batadv_priv *bat_priv;
613 struct net_device *soft_iface;
615 bat_priv = container_of(work, struct batadv_priv,
617 soft_iface = bat_priv->soft_iface;
619 /* destroy the "untagged" VLAN */
620 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
622 batadv_softif_destroy_vlan(bat_priv, vlan);
623 batadv_softif_vlan_free_ref(vlan);
626 batadv_sysfs_del_meshif(soft_iface);
629 unregister_netdevice(soft_iface);
634 * batadv_softif_init_late - late stage initialization of soft interface
635 * @dev: registered network device to modify
637 * Returns error code on failures
639 static int batadv_softif_init_late(struct net_device *dev)
641 struct batadv_priv *bat_priv;
642 uint32_t random_seqno;
644 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
646 batadv_set_lockdep_class(dev);
648 bat_priv = netdev_priv(dev);
649 bat_priv->soft_iface = dev;
650 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
652 /* batadv_interface_stats() needs to be available as soon as
653 * register_netdevice() has been called
655 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
656 if (!bat_priv->bat_counters)
659 atomic_set(&bat_priv->aggregated_ogms, 1);
660 atomic_set(&bat_priv->bonding, 0);
661 #ifdef CONFIG_BATMAN_ADV_BLA
662 atomic_set(&bat_priv->bridge_loop_avoidance, 0);
664 #ifdef CONFIG_BATMAN_ADV_DAT
665 atomic_set(&bat_priv->distributed_arp_table, 1);
667 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
668 atomic_set(&bat_priv->gw_sel_class, 20);
669 atomic_set(&bat_priv->gw.bandwidth_down, 100);
670 atomic_set(&bat_priv->gw.bandwidth_up, 20);
671 atomic_set(&bat_priv->orig_interval, 1000);
672 atomic_set(&bat_priv->hop_penalty, 30);
673 #ifdef CONFIG_BATMAN_ADV_DEBUG
674 atomic_set(&bat_priv->log_level, 0);
676 atomic_set(&bat_priv->fragmentation, 1);
677 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
678 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
680 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
681 atomic_set(&bat_priv->bcast_seqno, 1);
682 atomic_set(&bat_priv->tt.vn, 0);
683 atomic_set(&bat_priv->tt.local_changes, 0);
684 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
685 #ifdef CONFIG_BATMAN_ADV_BLA
686 atomic_set(&bat_priv->bla.num_requests, 0);
688 bat_priv->tt.last_changeset = NULL;
689 bat_priv->tt.last_changeset_len = 0;
691 /* randomize initial seqno to avoid collision */
692 get_random_bytes(&random_seqno, sizeof(random_seqno));
693 atomic_set(&bat_priv->frag_seqno, random_seqno);
695 bat_priv->primary_if = NULL;
696 bat_priv->num_ifaces = 0;
698 batadv_nc_init_bat_priv(bat_priv);
700 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
702 goto free_bat_counters;
704 ret = batadv_debugfs_add_meshif(dev);
706 goto free_bat_counters;
708 ret = batadv_mesh_init(dev);
715 batadv_debugfs_del_meshif(dev);
717 free_percpu(bat_priv->bat_counters);
718 bat_priv->bat_counters = NULL;
724 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
725 * @dev: batadv_soft_interface used as master interface
726 * @slave_dev: net_device which should become the slave interface
728 * Return 0 if successful or error otherwise.
730 static int batadv_softif_slave_add(struct net_device *dev,
731 struct net_device *slave_dev)
733 struct batadv_hard_iface *hard_iface;
736 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
737 if (!hard_iface || hard_iface->soft_iface != NULL)
740 ret = batadv_hardif_enable_interface(hard_iface, dev->name);
744 batadv_hardif_free_ref(hard_iface);
749 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
750 * @dev: batadv_soft_interface used as master interface
751 * @slave_dev: net_device which should be removed from the master interface
753 * Return 0 if successful or error otherwise.
755 static int batadv_softif_slave_del(struct net_device *dev,
756 struct net_device *slave_dev)
758 struct batadv_hard_iface *hard_iface;
761 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
763 if (!hard_iface || hard_iface->soft_iface != dev)
766 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
771 batadv_hardif_free_ref(hard_iface);
775 static const struct net_device_ops batadv_netdev_ops = {
776 .ndo_init = batadv_softif_init_late,
777 .ndo_open = batadv_interface_open,
778 .ndo_stop = batadv_interface_release,
779 .ndo_get_stats = batadv_interface_stats,
780 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
781 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
782 .ndo_set_mac_address = batadv_interface_set_mac_addr,
783 .ndo_change_mtu = batadv_interface_change_mtu,
784 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
785 .ndo_start_xmit = batadv_interface_tx,
786 .ndo_validate_addr = eth_validate_addr,
787 .ndo_add_slave = batadv_softif_slave_add,
788 .ndo_del_slave = batadv_softif_slave_del,
792 * batadv_softif_free - Deconstructor of batadv_soft_interface
793 * @dev: Device to cleanup and remove
795 static void batadv_softif_free(struct net_device *dev)
797 batadv_debugfs_del_meshif(dev);
798 batadv_mesh_free(dev);
800 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
801 * their tasks. Wait for them all to be finished before freeing the
802 * netdev and its private data (bat_priv)
810 * batadv_softif_init_early - early stage initialization of soft interface
811 * @dev: registered network device to modify
813 static void batadv_softif_init_early(struct net_device *dev)
815 struct batadv_priv *priv = netdev_priv(dev);
819 dev->netdev_ops = &batadv_netdev_ops;
820 dev->destructor = batadv_softif_free;
821 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
822 dev->tx_queue_len = 0;
824 /* can't call min_mtu, because the needed variables
825 * have not been initialized yet
827 dev->mtu = ETH_DATA_LEN;
828 /* reserve more space in the skbuff for our header */
829 dev->hard_header_len = batadv_max_header_len();
831 /* generate random address */
832 eth_hw_addr_random(dev);
834 SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
836 memset(priv, 0, sizeof(*priv));
839 struct net_device *batadv_softif_create(const char *name)
841 struct net_device *soft_iface;
844 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
845 batadv_softif_init_early);
849 soft_iface->rtnl_link_ops = &batadv_link_ops;
851 ret = register_netdevice(soft_iface);
853 pr_err("Unable to register the batman interface '%s': %i\n",
855 free_netdev(soft_iface);
863 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
864 * @soft_iface: the to-be-removed batman-adv interface
866 void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
868 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
870 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
874 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
875 * @soft_iface: the to-be-removed batman-adv interface
876 * @head: list pointer
878 static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
879 struct list_head *head)
881 struct batadv_hard_iface *hard_iface;
883 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
884 if (hard_iface->soft_iface == soft_iface)
885 batadv_hardif_disable_interface(hard_iface,
886 BATADV_IF_CLEANUP_KEEP);
889 batadv_sysfs_del_meshif(soft_iface);
890 unregister_netdevice_queue(soft_iface, head);
893 int batadv_softif_is_valid(const struct net_device *net_dev)
895 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
901 struct rtnl_link_ops batadv_link_ops __read_mostly = {
903 .priv_size = sizeof(struct batadv_priv),
904 .setup = batadv_softif_init_early,
905 .dellink = batadv_softif_destroy_netlink,
909 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
912 cmd->advertising = 0;
913 ethtool_cmd_speed_set(cmd, SPEED_10);
914 cmd->duplex = DUPLEX_FULL;
916 cmd->phy_address = 0;
917 cmd->transceiver = XCVR_INTERNAL;
918 cmd->autoneg = AUTONEG_DISABLE;
925 static void batadv_get_drvinfo(struct net_device *dev,
926 struct ethtool_drvinfo *info)
928 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
929 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
930 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
931 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
934 static u32 batadv_get_msglevel(struct net_device *dev)
939 static void batadv_set_msglevel(struct net_device *dev, u32 value)
943 static u32 batadv_get_link(struct net_device *dev)
948 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
949 * Declare each description string in struct.name[] to get fixed sized buffer
950 * and compile time checking for strings longer than ETH_GSTRING_LEN.
952 static const struct {
953 const char name[ETH_GSTRING_LEN];
954 } batadv_counters_strings[] = {
971 { "frag_fwd_bytes" },
974 { "tt_response_tx" },
975 { "tt_response_rx" },
976 { "tt_roam_adv_tx" },
977 { "tt_roam_adv_rx" },
978 #ifdef CONFIG_BATMAN_ADV_DAT
983 { "dat_cached_reply_tx" },
985 #ifdef CONFIG_BATMAN_ADV_NC
989 { "nc_recode_bytes" },
992 { "nc_decode_bytes" },
993 { "nc_decode_failed" },
998 static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
1001 if (stringset == ETH_SS_STATS)
1002 memcpy(data, batadv_counters_strings,
1003 sizeof(batadv_counters_strings));
1006 static void batadv_get_ethtool_stats(struct net_device *dev,
1007 struct ethtool_stats *stats,
1010 struct batadv_priv *bat_priv = netdev_priv(dev);
1013 for (i = 0; i < BATADV_CNT_NUM; i++)
1014 data[i] = batadv_sum_counter(bat_priv, i);
1017 static int batadv_get_sset_count(struct net_device *dev, int stringset)
1019 if (stringset == ETH_SS_STATS)
1020 return BATADV_CNT_NUM;