1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include "soft-interface.h"
19#include "main.h"
20
21#include <linux/atomic.h>
22#include <linux/byteorder/generic.h>
23#include <linux/cache.h>
24#include <linux/compiler.h>
25#include <linux/errno.h>
26#include <linux/etherdevice.h>
27#include <linux/ethtool.h>
28#include <linux/fs.h>
29#include <linux/if_ether.h>
30#include <linux/if_vlan.h>
31#include <linux/jiffies.h>
32#include <linux/kernel.h>
33#include <linux/kref.h>
34#include <linux/list.h>
35#include <linux/lockdep.h>
36#include <linux/netdevice.h>
37#include <linux/percpu.h>
38#include <linux/printk.h>
39#include <linux/random.h>
40#include <linux/rculist.h>
41#include <linux/rcupdate.h>
42#include <linux/rtnetlink.h>
43#include <linux/skbuff.h>
44#include <linux/slab.h>
45#include <linux/socket.h>
46#include <linux/spinlock.h>
47#include <linux/stddef.h>
48#include <linux/string.h>
49#include <linux/types.h>
50
51#include "bat_algo.h"
52#include "bridge_loop_avoidance.h"
53#include "debugfs.h"
54#include "distributed-arp-table.h"
55#include "gateway_client.h"
56#include "gateway_common.h"
57#include "hard-interface.h"
58#include "multicast.h"
59#include "network-coding.h"
60#include "originator.h"
61#include "packet.h"
62#include "send.h"
63#include "sysfs.h"
64#include "translation-table.h"
65
66static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
67static void batadv_get_drvinfo(struct net_device *dev,
68 struct ethtool_drvinfo *info);
69static u32 batadv_get_msglevel(struct net_device *dev);
70static void batadv_set_msglevel(struct net_device *dev, u32 value);
71static u32 batadv_get_link(struct net_device *dev);
72static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
73static void batadv_get_ethtool_stats(struct net_device *dev,
74 struct ethtool_stats *stats, u64 *data);
75static int batadv_get_sset_count(struct net_device *dev, int stringset);
76
77static const struct ethtool_ops batadv_ethtool_ops = {
78 .get_settings = batadv_get_settings,
79 .get_drvinfo = batadv_get_drvinfo,
80 .get_msglevel = batadv_get_msglevel,
81 .set_msglevel = batadv_set_msglevel,
82 .get_link = batadv_get_link,
83 .get_strings = batadv_get_strings,
84 .get_ethtool_stats = batadv_get_ethtool_stats,
85 .get_sset_count = batadv_get_sset_count,
86};
87
88int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
89{
90 int result;
91
92
93
94
95
96
97
98
99 result = skb_cow_head(skb, len);
100 if (result < 0)
101 return result;
102
103 skb_push(skb, len);
104 return 0;
105}
106
107static int batadv_interface_open(struct net_device *dev)
108{
109 netif_start_queue(dev);
110 return 0;
111}
112
113static int batadv_interface_release(struct net_device *dev)
114{
115 netif_stop_queue(dev);
116 return 0;
117}
118
119static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
120{
121 struct batadv_priv *bat_priv = netdev_priv(dev);
122 struct net_device_stats *stats = &bat_priv->stats;
123
124 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
125 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
126 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
127 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
128 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
129 return stats;
130}
131
132static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
133{
134 struct batadv_priv *bat_priv = netdev_priv(dev);
135 struct batadv_softif_vlan *vlan;
136 struct sockaddr *addr = p;
137 u8 old_addr[ETH_ALEN];
138
139 if (!is_valid_ether_addr(addr->sa_data))
140 return -EADDRNOTAVAIL;
141
142 ether_addr_copy(old_addr, dev->dev_addr);
143 ether_addr_copy(dev->dev_addr, addr->sa_data);
144
145
146 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
147 return 0;
148
149 rcu_read_lock();
150 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
151 batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,
152 "mac address changed", false);
153 batadv_tt_local_add(dev, addr->sa_data, vlan->vid,
154 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
155 }
156 rcu_read_unlock();
157
158 return 0;
159}
160
161static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
162{
163
164 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
165 return -EINVAL;
166
167 dev->mtu = new_mtu;
168
169 return 0;
170}
171
172
173
174
175
176
177
178
179
180static void batadv_interface_set_rx_mode(struct net_device *dev)
181{
182}
183
184static int batadv_interface_tx(struct sk_buff *skb,
185 struct net_device *soft_iface)
186{
187 struct ethhdr *ethhdr;
188 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
189 struct batadv_hard_iface *primary_if = NULL;
190 struct batadv_bcast_packet *bcast_packet;
191 static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
192 0x00, 0x00};
193 static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
194 0x00, 0x00};
195 enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
196 u8 *dst_hint = NULL, chaddr[ETH_ALEN];
197 struct vlan_ethhdr *vhdr;
198 unsigned int header_len = 0;
199 int data_len = skb->len, ret;
200 unsigned long brd_delay = 1;
201 bool do_bcast = false, client_added;
202 unsigned short vid;
203 u32 seqno;
204 int gw_mode;
205 enum batadv_forw_mode forw_mode;
206 struct batadv_orig_node *mcast_single_orig = NULL;
207 int network_offset = ETH_HLEN;
208
209 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
210 goto dropped;
211
212 netif_trans_update(soft_iface);
213 vid = batadv_get_vid(skb, 0);
214 ethhdr = eth_hdr(skb);
215
216 switch (ntohs(ethhdr->h_proto)) {
217 case ETH_P_8021Q:
218 vhdr = vlan_eth_hdr(skb);
219
220
221 if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) {
222 network_offset += VLAN_HLEN;
223 break;
224 }
225
226
227 case ETH_P_BATMAN:
228 goto dropped;
229 }
230
231 skb_set_network_header(skb, network_offset);
232
233 if (batadv_bla_tx(bat_priv, skb, vid))
234 goto dropped;
235
236
237 ethhdr = eth_hdr(skb);
238
239
240 if (!is_multicast_ether_addr(ethhdr->h_source)) {
241 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
242 vid, skb->skb_iif,
243 skb->mark);
244 if (!client_added)
245 goto dropped;
246 }
247
248
249
250
251
252
253
254 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
255 goto dropped;
256
257 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
258 goto dropped;
259
260 gw_mode = atomic_read(&bat_priv->gw.mode);
261 if (is_multicast_ether_addr(ethhdr->h_dest)) {
262
263 if (gw_mode == BATADV_GW_MODE_OFF) {
264 do_bcast = true;
265 goto send;
266 }
267
268 dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
269 chaddr);
270
271
272
273 ethhdr = eth_hdr(skb);
274
275
276
277 if (dhcp_rcp == BATADV_DHCP_NO) {
278 do_bcast = true;
279 goto send;
280 }
281
282 if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
283 dst_hint = chaddr;
284 else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
285 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
286
287
288
289 goto dropped;
290
291send:
292 if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
293 forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
294 &mcast_single_orig);
295 if (forw_mode == BATADV_FORW_NONE)
296 goto dropped;
297
298 if (forw_mode == BATADV_FORW_SINGLE)
299 do_bcast = false;
300 }
301 }
302
303 batadv_skb_set_priority(skb, 0);
304
305
306 if (do_bcast) {
307 primary_if = batadv_primary_if_get_selected(bat_priv);
308 if (!primary_if)
309 goto dropped;
310
311
312
313
314
315 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
316 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
317
318 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
319 goto dropped;
320
321 bcast_packet = (struct batadv_bcast_packet *)skb->data;
322 bcast_packet->version = BATADV_COMPAT_VERSION;
323 bcast_packet->ttl = BATADV_TTL;
324
325
326 bcast_packet->packet_type = BATADV_BCAST;
327 bcast_packet->reserved = 0;
328
329
330
331
332 ether_addr_copy(bcast_packet->orig,
333 primary_if->net_dev->dev_addr);
334
335
336 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
337 bcast_packet->seqno = htonl(seqno);
338
339 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
340
341
342
343
344 kfree_skb(skb);
345
346
347 } else {
348
349 if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
350 ret = batadv_gw_out_of_range(bat_priv, skb);
351 if (ret)
352 goto dropped;
353 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
354 } else if (mcast_single_orig) {
355 ret = batadv_send_skb_unicast(bat_priv, skb,
356 BATADV_UNICAST, 0,
357 mcast_single_orig, vid);
358 } else {
359 if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
360 skb))
361 goto dropped;
362
363 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
364
365 ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
366 vid);
367 }
368 if (ret == NET_XMIT_DROP)
369 goto dropped_freed;
370 }
371
372 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
373 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
374 goto end;
375
376dropped:
377 kfree_skb(skb);
378dropped_freed:
379 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
380end:
381 if (mcast_single_orig)
382 batadv_orig_node_put(mcast_single_orig);
383 if (primary_if)
384 batadv_hardif_put(primary_if);
385 return NETDEV_TX_OK;
386}
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405void batadv_interface_rx(struct net_device *soft_iface,
406 struct sk_buff *skb, int hdr_size,
407 struct batadv_orig_node *orig_node)
408{
409 struct batadv_bcast_packet *batadv_bcast_packet;
410 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
411 struct vlan_ethhdr *vhdr;
412 struct ethhdr *ethhdr;
413 unsigned short vid;
414 bool is_bcast;
415
416 batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
417 is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
418
419 skb_pull_rcsum(skb, hdr_size);
420 skb_reset_mac_header(skb);
421
422
423
424
425 nf_reset(skb);
426
427 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
428 goto dropped;
429
430 vid = batadv_get_vid(skb, 0);
431 ethhdr = eth_hdr(skb);
432
433 switch (ntohs(ethhdr->h_proto)) {
434 case ETH_P_8021Q:
435 if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
436 goto dropped;
437
438 vhdr = (struct vlan_ethhdr *)skb->data;
439
440
441 if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
442 break;
443
444
445 case ETH_P_BATMAN:
446 goto dropped;
447 }
448
449
450 skb->protocol = eth_type_trans(skb, soft_iface);
451
452
453
454
455
456
457
458
459 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
460 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
461 skb->len + ETH_HLEN);
462
463 soft_iface->last_rx = jiffies;
464
465
466
467
468 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
469 goto out;
470
471 if (orig_node)
472 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
473 ethhdr->h_source, vid);
474
475 if (is_multicast_ether_addr(ethhdr->h_dest)) {
476
477
478
479 if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
480 batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
481 vid)) {
482
483
484
485 skb->mark &= ~bat_priv->isolation_mark_mask;
486 skb->mark |= bat_priv->isolation_mark;
487 }
488 } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
489 ethhdr->h_dest, vid)) {
490 goto dropped;
491 }
492
493 netif_rx(skb);
494 goto out;
495
496dropped:
497 kfree_skb(skb);
498out:
499 return;
500}
501
502
503
504
505
506
507static void batadv_softif_vlan_release(struct kref *ref)
508{
509 struct batadv_softif_vlan *vlan;
510
511 vlan = container_of(ref, struct batadv_softif_vlan, refcount);
512
513 spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);
514 hlist_del_rcu(&vlan->list);
515 spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
516
517 kfree_rcu(vlan, rcu);
518}
519
520
521
522
523
524
525void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan)
526{
527 if (!vlan)
528 return;
529
530 kref_put(&vlan->refcount, batadv_softif_vlan_release);
531}
532
533
534
535
536
537
538
539
540
541struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
542 unsigned short vid)
543{
544 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
545
546 rcu_read_lock();
547 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
548 if (vlan_tmp->vid != vid)
549 continue;
550
551 if (!kref_get_unless_zero(&vlan_tmp->refcount))
552 continue;
553
554 vlan = vlan_tmp;
555 break;
556 }
557 rcu_read_unlock();
558
559 return vlan;
560}
561
562
563
564
565
566
567
568
569int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
570{
571 struct batadv_softif_vlan *vlan;
572 int err;
573
574 vlan = batadv_softif_vlan_get(bat_priv, vid);
575 if (vlan) {
576 batadv_softif_vlan_put(vlan);
577 return -EEXIST;
578 }
579
580 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
581 if (!vlan)
582 return -ENOMEM;
583
584 vlan->bat_priv = bat_priv;
585 vlan->vid = vid;
586 kref_init(&vlan->refcount);
587
588 atomic_set(&vlan->ap_isolation, 0);
589
590 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
591 if (err) {
592 kfree(vlan);
593 return err;
594 }
595
596 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
597 kref_get(&vlan->refcount);
598 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
599 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
600
601
602
603
604 batadv_tt_local_add(bat_priv->soft_iface,
605 bat_priv->soft_iface->dev_addr, vid,
606 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
607
608
609 batadv_softif_vlan_put(vlan);
610
611 return 0;
612}
613
614
615
616
617
618
619static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
620 struct batadv_softif_vlan *vlan)
621{
622
623
624
625 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
626 vlan->vid, "vlan interface destroyed", false);
627
628 batadv_sysfs_del_vlan(bat_priv, vlan);
629 batadv_softif_vlan_put(vlan);
630}
631
632
633
634
635
636
637
638
639
640
641
642
643static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
644 unsigned short vid)
645{
646 struct batadv_priv *bat_priv = netdev_priv(dev);
647 struct batadv_softif_vlan *vlan;
648 int ret;
649
650
651
652
653 if (proto != htons(ETH_P_8021Q))
654 return -EINVAL;
655
656 vid |= BATADV_VLAN_HAS_TAG;
657
658
659
660
661
662
663
664 vlan = batadv_softif_vlan_get(bat_priv, vid);
665 if (!vlan)
666 return batadv_softif_create_vlan(bat_priv, vid);
667
668
669
670
671 if (!vlan->kobj) {
672 ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
673 if (ret) {
674 batadv_softif_vlan_put(vlan);
675 return ret;
676 }
677 }
678
679
680
681
682
683 batadv_tt_local_add(bat_priv->soft_iface,
684 bat_priv->soft_iface->dev_addr, vid,
685 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
686
687 return 0;
688}
689
690
691
692
693
694
695
696
697
698
699
700
701
702static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
703 unsigned short vid)
704{
705 struct batadv_priv *bat_priv = netdev_priv(dev);
706 struct batadv_softif_vlan *vlan;
707
708
709
710
711 if (proto != htons(ETH_P_8021Q))
712 return -EINVAL;
713
714 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
715 if (!vlan)
716 return -ENOENT;
717
718 batadv_softif_destroy_vlan(bat_priv, vlan);
719
720
721 batadv_softif_vlan_put(vlan);
722
723 return 0;
724}
725
726
727
728
729
730static struct lock_class_key batadv_netdev_xmit_lock_key;
731static struct lock_class_key batadv_netdev_addr_lock_key;
732
733
734
735
736
737
738
739static void batadv_set_lockdep_class_one(struct net_device *dev,
740 struct netdev_queue *txq,
741 void *_unused)
742{
743 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
744}
745
746
747
748
749
750static void batadv_set_lockdep_class(struct net_device *dev)
751{
752 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
753 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
754}
755
756
757
758
759
760
761
762static int batadv_softif_init_late(struct net_device *dev)
763{
764 struct batadv_priv *bat_priv;
765 u32 random_seqno;
766 int ret;
767 size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
768
769 batadv_set_lockdep_class(dev);
770
771 bat_priv = netdev_priv(dev);
772 bat_priv->soft_iface = dev;
773
774
775
776
777 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64));
778 if (!bat_priv->bat_counters)
779 return -ENOMEM;
780
781 atomic_set(&bat_priv->aggregated_ogms, 1);
782 atomic_set(&bat_priv->bonding, 0);
783#ifdef CONFIG_BATMAN_ADV_BLA
784 atomic_set(&bat_priv->bridge_loop_avoidance, 1);
785#endif
786#ifdef CONFIG_BATMAN_ADV_DAT
787 atomic_set(&bat_priv->distributed_arp_table, 1);
788#endif
789#ifdef CONFIG_BATMAN_ADV_MCAST
790 bat_priv->mcast.querier_ipv4.exists = false;
791 bat_priv->mcast.querier_ipv4.shadowing = false;
792 bat_priv->mcast.querier_ipv6.exists = false;
793 bat_priv->mcast.querier_ipv6.shadowing = false;
794 bat_priv->mcast.flags = BATADV_NO_FLAGS;
795 atomic_set(&bat_priv->multicast_mode, 1);
796 atomic_set(&bat_priv->mcast.num_disabled, 0);
797 atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
798 atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
799 atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
800#endif
801 atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF);
802 atomic_set(&bat_priv->gw.sel_class, 20);
803 atomic_set(&bat_priv->gw.bandwidth_down, 100);
804 atomic_set(&bat_priv->gw.bandwidth_up, 20);
805 atomic_set(&bat_priv->orig_interval, 1000);
806 atomic_set(&bat_priv->hop_penalty, 30);
807#ifdef CONFIG_BATMAN_ADV_DEBUG
808 atomic_set(&bat_priv->log_level, 0);
809#endif
810 atomic_set(&bat_priv->fragmentation, 1);
811 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
812 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
813 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
814
815 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
816 atomic_set(&bat_priv->bcast_seqno, 1);
817 atomic_set(&bat_priv->tt.vn, 0);
818 atomic_set(&bat_priv->tt.local_changes, 0);
819 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
820#ifdef CONFIG_BATMAN_ADV_BLA
821 atomic_set(&bat_priv->bla.num_requests, 0);
822#endif
823 atomic_set(&bat_priv->tp_num, 0);
824
825 bat_priv->tt.last_changeset = NULL;
826 bat_priv->tt.last_changeset_len = 0;
827 bat_priv->isolation_mark = 0;
828 bat_priv->isolation_mark_mask = 0;
829
830
831 get_random_bytes(&random_seqno, sizeof(random_seqno));
832 atomic_set(&bat_priv->frag_seqno, random_seqno);
833
834 bat_priv->primary_if = NULL;
835 bat_priv->num_ifaces = 0;
836
837 batadv_nc_init_bat_priv(bat_priv);
838
839 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
840 if (ret < 0)
841 goto free_bat_counters;
842
843 ret = batadv_debugfs_add_meshif(dev);
844 if (ret < 0)
845 goto free_bat_counters;
846
847 ret = batadv_mesh_init(dev);
848 if (ret < 0)
849 goto unreg_debugfs;
850
851 return 0;
852
853unreg_debugfs:
854 batadv_debugfs_del_meshif(dev);
855free_bat_counters:
856 free_percpu(bat_priv->bat_counters);
857 bat_priv->bat_counters = NULL;
858
859 return ret;
860}
861
862
863
864
865
866
867
868
869static int batadv_softif_slave_add(struct net_device *dev,
870 struct net_device *slave_dev)
871{
872 struct batadv_hard_iface *hard_iface;
873 struct net *net = dev_net(dev);
874 int ret = -EINVAL;
875
876 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
877 if (!hard_iface || hard_iface->soft_iface)
878 goto out;
879
880 ret = batadv_hardif_enable_interface(hard_iface, net, dev->name);
881
882out:
883 if (hard_iface)
884 batadv_hardif_put(hard_iface);
885 return ret;
886}
887
888
889
890
891
892
893
894
895static int batadv_softif_slave_del(struct net_device *dev,
896 struct net_device *slave_dev)
897{
898 struct batadv_hard_iface *hard_iface;
899 int ret = -EINVAL;
900
901 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
902
903 if (!hard_iface || hard_iface->soft_iface != dev)
904 goto out;
905
906 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
907 ret = 0;
908
909out:
910 if (hard_iface)
911 batadv_hardif_put(hard_iface);
912 return ret;
913}
914
915static const struct net_device_ops batadv_netdev_ops = {
916 .ndo_init = batadv_softif_init_late,
917 .ndo_open = batadv_interface_open,
918 .ndo_stop = batadv_interface_release,
919 .ndo_get_stats = batadv_interface_stats,
920 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
921 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
922 .ndo_set_mac_address = batadv_interface_set_mac_addr,
923 .ndo_change_mtu = batadv_interface_change_mtu,
924 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
925 .ndo_start_xmit = batadv_interface_tx,
926 .ndo_validate_addr = eth_validate_addr,
927 .ndo_add_slave = batadv_softif_slave_add,
928 .ndo_del_slave = batadv_softif_slave_del,
929};
930
931
932
933
934
935static void batadv_softif_free(struct net_device *dev)
936{
937 batadv_debugfs_del_meshif(dev);
938 batadv_mesh_free(dev);
939
940
941
942
943
944 rcu_barrier();
945
946 free_netdev(dev);
947}
948
949
950
951
952
953static void batadv_softif_init_early(struct net_device *dev)
954{
955 struct batadv_priv *priv = netdev_priv(dev);
956
957 ether_setup(dev);
958
959 dev->netdev_ops = &batadv_netdev_ops;
960 dev->destructor = batadv_softif_free;
961 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
962 dev->priv_flags |= IFF_NO_QUEUE;
963
964
965
966
967 dev->mtu = ETH_DATA_LEN;
968
969
970 eth_hw_addr_random(dev);
971
972 dev->ethtool_ops = &batadv_ethtool_ops;
973
974 memset(priv, 0, sizeof(*priv));
975}
976
977struct net_device *batadv_softif_create(struct net *net, const char *name)
978{
979 struct net_device *soft_iface;
980 int ret;
981
982 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
983 NET_NAME_UNKNOWN, batadv_softif_init_early);
984 if (!soft_iface)
985 return NULL;
986
987 dev_net_set(soft_iface, net);
988
989 soft_iface->rtnl_link_ops = &batadv_link_ops;
990
991 ret = register_netdevice(soft_iface);
992 if (ret < 0) {
993 pr_err("Unable to register the batman interface '%s': %i\n",
994 name, ret);
995 free_netdev(soft_iface);
996 return NULL;
997 }
998
999 return soft_iface;
1000}
1001
1002
1003
1004
1005
1006void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
1007{
1008 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
1009 struct batadv_softif_vlan *vlan;
1010
1011 ASSERT_RTNL();
1012
1013
1014 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
1015 if (vlan) {
1016 batadv_softif_destroy_vlan(bat_priv, vlan);
1017 batadv_softif_vlan_put(vlan);
1018 }
1019
1020 batadv_sysfs_del_meshif(soft_iface);
1021 unregister_netdevice(soft_iface);
1022}
1023
1024
1025
1026
1027
1028
1029static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
1030 struct list_head *head)
1031{
1032 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
1033 struct batadv_hard_iface *hard_iface;
1034 struct batadv_softif_vlan *vlan;
1035
1036 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
1037 if (hard_iface->soft_iface == soft_iface)
1038 batadv_hardif_disable_interface(hard_iface,
1039 BATADV_IF_CLEANUP_KEEP);
1040 }
1041
1042
1043 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
1044 if (vlan) {
1045 batadv_softif_destroy_vlan(bat_priv, vlan);
1046 batadv_softif_vlan_put(vlan);
1047 }
1048
1049 batadv_sysfs_del_meshif(soft_iface);
1050 unregister_netdevice_queue(soft_iface, head);
1051}
1052
1053bool batadv_softif_is_valid(const struct net_device *net_dev)
1054{
1055 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
1056 return true;
1057
1058 return false;
1059}
1060
1061struct rtnl_link_ops batadv_link_ops __read_mostly = {
1062 .kind = "batadv",
1063 .priv_size = sizeof(struct batadv_priv),
1064 .setup = batadv_softif_init_early,
1065 .dellink = batadv_softif_destroy_netlink,
1066};
1067
1068
1069static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1070{
1071 cmd->supported = 0;
1072 cmd->advertising = 0;
1073 ethtool_cmd_speed_set(cmd, SPEED_10);
1074 cmd->duplex = DUPLEX_FULL;
1075 cmd->port = PORT_TP;
1076 cmd->phy_address = 0;
1077 cmd->transceiver = XCVR_INTERNAL;
1078 cmd->autoneg = AUTONEG_DISABLE;
1079 cmd->maxtxpkt = 0;
1080 cmd->maxrxpkt = 0;
1081
1082 return 0;
1083}
1084
1085static void batadv_get_drvinfo(struct net_device *dev,
1086 struct ethtool_drvinfo *info)
1087{
1088 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
1089 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
1090 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1091 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
1092}
1093
1094static u32 batadv_get_msglevel(struct net_device *dev)
1095{
1096 return -EOPNOTSUPP;
1097}
1098
1099static void batadv_set_msglevel(struct net_device *dev, u32 value)
1100{
1101}
1102
1103static u32 batadv_get_link(struct net_device *dev)
1104{
1105 return 1;
1106}
1107
1108
1109
1110
1111
1112static const struct {
1113 const char name[ETH_GSTRING_LEN];
1114} batadv_counters_strings[] = {
1115 { "tx" },
1116 { "tx_bytes" },
1117 { "tx_dropped" },
1118 { "rx" },
1119 { "rx_bytes" },
1120 { "forward" },
1121 { "forward_bytes" },
1122 { "mgmt_tx" },
1123 { "mgmt_tx_bytes" },
1124 { "mgmt_rx" },
1125 { "mgmt_rx_bytes" },
1126 { "frag_tx" },
1127 { "frag_tx_bytes" },
1128 { "frag_rx" },
1129 { "frag_rx_bytes" },
1130 { "frag_fwd" },
1131 { "frag_fwd_bytes" },
1132 { "tt_request_tx" },
1133 { "tt_request_rx" },
1134 { "tt_response_tx" },
1135 { "tt_response_rx" },
1136 { "tt_roam_adv_tx" },
1137 { "tt_roam_adv_rx" },
1138#ifdef CONFIG_BATMAN_ADV_DAT
1139 { "dat_get_tx" },
1140 { "dat_get_rx" },
1141 { "dat_put_tx" },
1142 { "dat_put_rx" },
1143 { "dat_cached_reply_tx" },
1144#endif
1145#ifdef CONFIG_BATMAN_ADV_NC
1146 { "nc_code" },
1147 { "nc_code_bytes" },
1148 { "nc_recode" },
1149 { "nc_recode_bytes" },
1150 { "nc_buffer" },
1151 { "nc_decode" },
1152 { "nc_decode_bytes" },
1153 { "nc_decode_failed" },
1154 { "nc_sniffed" },
1155#endif
1156};
1157
1158static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1159{
1160 if (stringset == ETH_SS_STATS)
1161 memcpy(data, batadv_counters_strings,
1162 sizeof(batadv_counters_strings));
1163}
1164
1165static void batadv_get_ethtool_stats(struct net_device *dev,
1166 struct ethtool_stats *stats, u64 *data)
1167{
1168 struct batadv_priv *bat_priv = netdev_priv(dev);
1169 int i;
1170
1171 for (i = 0; i < BATADV_CNT_NUM; i++)
1172 data[i] = batadv_sum_counter(bat_priv, i);
1173}
1174
1175static int batadv_get_sset_count(struct net_device *dev, int stringset)
1176{
1177 if (stringset == ETH_SS_STATS)
1178 return BATADV_CNT_NUM;
1179
1180 return -EOPNOTSUPP;
1181}
1182