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e19f9759 1/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
c6c8fea2
SE
2 *
3 * Marek Lindner, Simon Wunderlich
4 *
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.
8 *
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.
13 *
14 * You should have received a copy of the GNU General Public License
ebf38fb7 15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
c6c8fea2
SE
16 */
17
18#include "main.h"
19#include "soft-interface.h"
20#include "hard-interface.h"
c384ea3e 21#include "distributed-arp-table.h"
c6c8fea2
SE
22#include "routing.h"
23#include "send.h"
b706b13b 24#include "debugfs.h"
c6c8fea2 25#include "translation-table.h"
c6c8fea2
SE
26#include "hash.h"
27#include "gateway_common.h"
28#include "gateway_client.h"
b706b13b 29#include "sysfs.h"
43676ab5 30#include "originator.h"
c6c8fea2
SE
31#include <linux/slab.h>
32#include <linux/ethtool.h>
33#include <linux/etherdevice.h>
34#include <linux/if_vlan.h>
1d8ab8d3 35#include "multicast.h"
23721387 36#include "bridge_loop_avoidance.h"
d353d8d4 37#include "network-coding.h"
c6c8fea2
SE
38
39
0294ca0d
SE
40static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
41static void batadv_get_drvinfo(struct net_device *dev,
42 struct ethtool_drvinfo *info);
43static u32 batadv_get_msglevel(struct net_device *dev);
44static void batadv_set_msglevel(struct net_device *dev, u32 value);
45static u32 batadv_get_link(struct net_device *dev);
f8214865
MH
46static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
47static void batadv_get_ethtool_stats(struct net_device *dev,
48 struct ethtool_stats *stats, u64 *data);
49static int batadv_get_sset_count(struct net_device *dev, int stringset);
c6c8fea2 50
0294ca0d
SE
51static const struct ethtool_ops batadv_ethtool_ops = {
52 .get_settings = batadv_get_settings,
53 .get_drvinfo = batadv_get_drvinfo,
54 .get_msglevel = batadv_get_msglevel,
55 .set_msglevel = batadv_set_msglevel,
56 .get_link = batadv_get_link,
f8214865
MH
57 .get_strings = batadv_get_strings,
58 .get_ethtool_stats = batadv_get_ethtool_stats,
59 .get_sset_count = batadv_get_sset_count,
c6c8fea2
SE
60};
61
04b482a2 62int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
c6c8fea2
SE
63{
64 int result;
65
9cfc7bd6 66 /* TODO: We must check if we can release all references to non-payload
c6c8fea2
SE
67 * data using skb_header_release in our skbs to allow skb_cow_header to
68 * work optimally. This means that those skbs are not allowed to read
69 * or write any data which is before the current position of skb->data
70 * after that call and thus allow other skbs with the same data buffer
71 * to write freely in that area.
72 */
73 result = skb_cow_head(skb, len);
74 if (result < 0)
75 return result;
76
77 skb_push(skb, len);
78 return 0;
79}
80
0294ca0d 81static int batadv_interface_open(struct net_device *dev)
c6c8fea2
SE
82{
83 netif_start_queue(dev);
84 return 0;
85}
86
0294ca0d 87static int batadv_interface_release(struct net_device *dev)
c6c8fea2
SE
88{
89 netif_stop_queue(dev);
90 return 0;
91}
92
0294ca0d 93static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
c6c8fea2 94{
56303d34 95 struct batadv_priv *bat_priv = netdev_priv(dev);
1c9b0550
ML
96 struct net_device_stats *stats = &bat_priv->stats;
97
98 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
99 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
100 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
101 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
102 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
103 return stats;
c6c8fea2
SE
104}
105
0294ca0d 106static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
c6c8fea2 107{
56303d34 108 struct batadv_priv *bat_priv = netdev_priv(dev);
c6c8fea2 109 struct sockaddr *addr = p;
40a3eb33 110 uint8_t old_addr[ETH_ALEN];
c6c8fea2
SE
111
112 if (!is_valid_ether_addr(addr->sa_data))
113 return -EADDRNOTAVAIL;
114
8fdd0153
AQ
115 ether_addr_copy(old_addr, dev->dev_addr);
116 ether_addr_copy(dev->dev_addr, addr->sa_data);
40a3eb33 117
015758d0 118 /* only modify transtable if it has been initialized before */
39c75a51 119 if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
c018ad3d 120 batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
08c36d3e 121 "mac address changed", false);
c018ad3d 122 batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
9464d071 123 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
c6c8fea2
SE
124 }
125
c6c8fea2
SE
126 return 0;
127}
128
0294ca0d 129static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
c6c8fea2
SE
130{
131 /* check ranges */
9563877e 132 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
c6c8fea2
SE
133 return -EINVAL;
134
135 dev->mtu = new_mtu;
136
137 return 0;
138}
139
a4deee1a
LL
140/**
141 * batadv_interface_set_rx_mode - set the rx mode of a device
142 * @dev: registered network device to modify
143 *
144 * We do not actually need to set any rx filters for the virtual batman
145 * soft interface. However a dummy handler enables a user to set static
146 * multicast listeners for instance.
147 */
148static void batadv_interface_set_rx_mode(struct net_device *dev)
149{
150}
151
0294ca0d
SE
152static int batadv_interface_tx(struct sk_buff *skb,
153 struct net_device *soft_iface)
c6c8fea2 154{
c018ad3d 155 struct ethhdr *ethhdr;
56303d34
SE
156 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
157 struct batadv_hard_iface *primary_if = NULL;
96412690 158 struct batadv_bcast_packet *bcast_packet;
293e9338 159 __be16 ethertype = htons(ETH_P_BATMAN);
4934ab95
SW
160 static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
161 0x00, 0x00};
162 static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
163 0x00, 0x00};
6c413b1c
AQ
164 enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
165 uint8_t *dst_hint = NULL, chaddr[ETH_ALEN];
c018ad3d 166 struct vlan_ethhdr *vhdr;
be7af5cf 167 unsigned int header_len = 0;
c6c8fea2 168 int data_len = skb->len, ret;
c018ad3d 169 unsigned long brd_delay = 1;
a19d3d85 170 bool do_bcast = false, client_added;
c018ad3d 171 unsigned short vid;
bbb1f90e 172 uint32_t seqno;
6c413b1c 173 int gw_mode;
1d8ab8d3
LL
174 enum batadv_forw_mode forw_mode;
175 struct batadv_orig_node *mcast_single_orig = NULL;
c6c8fea2 176
39c75a51 177 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
c6c8fea2
SE
178 goto dropped;
179
180 soft_iface->trans_start = jiffies;
c018ad3d 181 vid = batadv_get_vid(skb, 0);
927c2ed7 182 ethhdr = eth_hdr(skb);
c6c8fea2
SE
183
184 switch (ntohs(ethhdr->h_proto)) {
185 case ETH_P_8021Q:
927c2ed7 186 vhdr = vlan_eth_hdr(skb);
c6c8fea2 187
7e071c79 188 if (vhdr->h_vlan_encapsulated_proto != ethertype)
c6c8fea2
SE
189 break;
190
191 /* fall through */
af5d4f77 192 case ETH_P_BATMAN:
c6c8fea2 193 goto dropped;
a7f6ee94 194 }
c6c8fea2 195
08adf151 196 if (batadv_bla_tx(bat_priv, skb, vid))
23721387
SW
197 goto dropped;
198
9d2c9488 199 /* skb->data might have been reallocated by batadv_bla_tx() */
927c2ed7 200 ethhdr = eth_hdr(skb);
9d2c9488 201
a73105b8 202 /* Register the client MAC in the transtable */
a19d3d85
ML
203 if (!is_multicast_ether_addr(ethhdr->h_source)) {
204 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
9464d071
AQ
205 vid, skb->skb_iif,
206 skb->mark);
a19d3d85
ML
207 if (!client_added)
208 goto dropped;
209 }
c6c8fea2 210
b1a8c04b
SW
211 /* don't accept stp packets. STP does not help in meshes.
212 * better use the bridge loop avoidance ...
4934ab95
SW
213 *
214 * The same goes for ECTP sent at least by some Cisco Switches,
215 * it might confuse the mesh when used with bridge loop avoidance.
b1a8c04b 216 */
1eda58bf 217 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
b1a8c04b
SW
218 goto dropped;
219
4934ab95
SW
220 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
221 goto dropped;
222
6c413b1c 223 gw_mode = atomic_read(&bat_priv->gw_mode);
be7af5cf 224 if (is_multicast_ether_addr(ethhdr->h_dest)) {
6c413b1c
AQ
225 /* if gw mode is off, broadcast every packet */
226 if (gw_mode == BATADV_GW_MODE_OFF) {
227 do_bcast = true;
228 goto send;
be7af5cf 229 }
9d2c9488 230
6c413b1c
AQ
231 dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
232 chaddr);
233 /* skb->data may have been modified by
234 * batadv_gw_dhcp_recipient_get()
9d2c9488 235 */
927c2ed7 236 ethhdr = eth_hdr(skb);
6c413b1c
AQ
237 /* if gw_mode is on, broadcast any non-DHCP message.
238 * All the DHCP packets are going to be sent as unicast
239 */
240 if (dhcp_rcp == BATADV_DHCP_NO) {
241 do_bcast = true;
242 goto send;
243 }
244
245 if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
246 dst_hint = chaddr;
247 else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
248 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
249 /* gateways should not forward any DHCP message if
250 * directed to a DHCP server
251 */
252 goto dropped;
c6c8fea2 253
6c413b1c 254send:
1d8ab8d3
LL
255 if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
256 forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
257 &mcast_single_orig);
258 if (forw_mode == BATADV_FORW_NONE)
259 goto dropped;
260
261 if (forw_mode == BATADV_FORW_SINGLE)
262 do_bcast = false;
263 }
264 }
265
c54f38c9
SW
266 batadv_skb_set_priority(skb, 0);
267
c6c8fea2
SE
268 /* ethernet packet should be broadcasted */
269 if (do_bcast) {
e5d89254 270 primary_if = batadv_primary_if_get_selected(bat_priv);
32ae9b22 271 if (!primary_if)
c6c8fea2
SE
272 goto dropped;
273
c384ea3e
AQ
274 /* in case of ARP request, we do not immediately broadcasti the
275 * packet, instead we first wait for DAT to try to retrieve the
276 * correct ARP entry
277 */
278 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
279 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
280
04b482a2 281 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
c6c8fea2
SE
282 goto dropped;
283
96412690 284 bcast_packet = (struct batadv_bcast_packet *)skb->data;
a40d9b07
SW
285 bcast_packet->version = BATADV_COMPAT_VERSION;
286 bcast_packet->ttl = BATADV_TTL;
c6c8fea2
SE
287
288 /* batman packet type: broadcast */
a40d9b07 289 bcast_packet->packet_type = BATADV_BCAST;
162d549c 290 bcast_packet->reserved = 0;
c6c8fea2
SE
291
292 /* hw address of first interface is the orig mac because only
9cfc7bd6
SE
293 * this mac is known throughout the mesh
294 */
8fdd0153
AQ
295 ether_addr_copy(bcast_packet->orig,
296 primary_if->net_dev->dev_addr);
c6c8fea2
SE
297
298 /* set broadcast sequence number */
bbb1f90e
SE
299 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
300 bcast_packet->seqno = htonl(seqno);
c6c8fea2 301
c384ea3e 302 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
c6c8fea2
SE
303
304 /* a copy is stored in the bcast list, therefore removing
9cfc7bd6
SE
305 * the original skb.
306 */
c6c8fea2
SE
307 kfree_skb(skb);
308
309 /* unicast packet */
310 } else {
6c413b1c
AQ
311 /* DHCP packets going to a server will use the GW feature */
312 if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
9d2c9488 313 ret = batadv_gw_out_of_range(bat_priv, skb);
be7af5cf
ML
314 if (ret)
315 goto dropped;
e300d314 316 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
1d8ab8d3
LL
317 } else if (mcast_single_orig) {
318 ret = batadv_send_skb_unicast(bat_priv, skb,
319 BATADV_UNICAST, 0,
320 mcast_single_orig, vid);
6c413b1c
AQ
321 } else {
322 if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
323 skb))
324 goto dropped;
e300d314 325
6c413b1c
AQ
326 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
327
328 ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
329 vid);
330 }
e300d314 331 if (ret == NET_XMIT_DROP)
c6c8fea2
SE
332 goto dropped_freed;
333 }
334
1c9b0550
ML
335 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
336 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
c6c8fea2
SE
337 goto end;
338
339dropped:
340 kfree_skb(skb);
341dropped_freed:
1c9b0550 342 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
c6c8fea2 343end:
32ae9b22 344 if (primary_if)
e5d89254 345 batadv_hardif_free_ref(primary_if);
c6c8fea2
SE
346 return NETDEV_TX_OK;
347}
348
04b482a2 349void batadv_interface_rx(struct net_device *soft_iface,
56303d34 350 struct sk_buff *skb, struct batadv_hard_iface *recv_if,
37135173 351 int hdr_size, struct batadv_orig_node *orig_node)
c6c8fea2 352{
a40d9b07 353 struct batadv_bcast_packet *batadv_bcast_packet;
c018ad3d 354 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
293e9338 355 __be16 ethertype = htons(ETH_P_BATMAN);
c018ad3d
AQ
356 struct vlan_ethhdr *vhdr;
357 struct ethhdr *ethhdr;
358 unsigned short vid;
2d3f6ccc
SW
359 bool is_bcast;
360
a40d9b07
SW
361 batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
362 is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
c6c8fea2
SE
363
364 /* check if enough space is available for pulling, and pull */
365 if (!pskb_may_pull(skb, hdr_size))
366 goto dropped;
367
368 skb_pull_rcsum(skb, hdr_size);
369 skb_reset_mac_header(skb);
370
55883fd1
AQ
371 /* clean the netfilter state now that the batman-adv header has been
372 * removed
373 */
374 nf_reset(skb);
375
2b1e2cb3 376 vid = batadv_get_vid(skb, 0);
7ed4be95 377 ethhdr = eth_hdr(skb);
c6c8fea2
SE
378
379 switch (ntohs(ethhdr->h_proto)) {
380 case ETH_P_8021Q:
381 vhdr = (struct vlan_ethhdr *)skb->data;
c6c8fea2 382
7e071c79 383 if (vhdr->h_vlan_encapsulated_proto != ethertype)
c6c8fea2
SE
384 break;
385
386 /* fall through */
af5d4f77 387 case ETH_P_BATMAN:
c6c8fea2
SE
388 goto dropped;
389 }
390
c6c8fea2
SE
391 /* skb->dev & skb->pkt_type are set here */
392 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
393 goto dropped;
394 skb->protocol = eth_type_trans(skb, soft_iface);
395
25985edc 396 /* should not be necessary anymore as we use skb_pull_rcsum()
c6c8fea2 397 * TODO: please verify this and remove this TODO
9cfc7bd6
SE
398 * -- Dec 21st 2009, Simon Wunderlich
399 */
c6c8fea2 400
9cfc7bd6 401 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
c6c8fea2 402
1c9b0550
ML
403 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
404 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
405 skb->len + ETH_HLEN);
c6c8fea2
SE
406
407 soft_iface->last_rx = jiffies;
408
74490f96
AQ
409 /* Let the bridge loop avoidance check the packet. If will
410 * not handle it, we can safely push it up.
411 */
412 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
413 goto out;
414
37135173
AQ
415 if (orig_node)
416 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
c018ad3d 417 ethhdr->h_source, vid);
37135173 418
42cb0bef
AQ
419 if (is_multicast_ether_addr(ethhdr->h_dest)) {
420 /* set the mark on broadcast packets if AP isolation is ON and
421 * the packet is coming from an "isolated" client
422 */
423 if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
424 batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
425 vid)) {
426 /* save bits in skb->mark not covered by the mask and
427 * apply the mark on the rest
428 */
429 skb->mark &= ~bat_priv->isolation_mark_mask;
430 skb->mark |= bat_priv->isolation_mark;
431 }
432 } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
433 ethhdr->h_dest, vid)) {
59b699cd 434 goto dropped;
42cb0bef 435 }
59b699cd 436
c6c8fea2 437 netif_rx(skb);
ba85fac2 438 goto out;
c6c8fea2
SE
439
440dropped:
441 kfree_skb(skb);
442out:
443 return;
444}
445
5d2c05b2
AQ
446/**
447 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
448 * possibly free it
449 * @softif_vlan: the vlan object to release
450 */
90f4435d 451void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *softif_vlan)
5d2c05b2
AQ
452{
453 if (atomic_dec_and_test(&softif_vlan->refcount))
454 kfree_rcu(softif_vlan, rcu);
455}
456
457/**
458 * batadv_softif_vlan_get - get the vlan object for a specific vid
459 * @bat_priv: the bat priv with all the soft interface information
460 * @vid: the identifier of the vlan object to retrieve
461 *
462 * Returns the private data of the vlan matching the vid passed as argument or
463 * NULL otherwise. The refcounter of the returned object is incremented by 1.
464 */
90f4435d
AQ
465struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
466 unsigned short vid)
5d2c05b2
AQ
467{
468 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
469
470 rcu_read_lock();
471 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
472 if (vlan_tmp->vid != vid)
473 continue;
474
475 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
476 continue;
477
478 vlan = vlan_tmp;
479 break;
480 }
481 rcu_read_unlock();
482
483 return vlan;
484}
485
486/**
487 * batadv_create_vlan - allocate the needed resources for a new vlan
488 * @bat_priv: the bat priv with all the soft interface information
489 * @vid: the VLAN identifier
490 *
491 * Returns 0 on success, a negative error otherwise.
492 */
493int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
494{
495 struct batadv_softif_vlan *vlan;
90f4435d 496 int err;
5d2c05b2
AQ
497
498 vlan = batadv_softif_vlan_get(bat_priv, vid);
499 if (vlan) {
500 batadv_softif_vlan_free_ref(vlan);
501 return -EEXIST;
502 }
503
504 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
505 if (!vlan)
506 return -ENOMEM;
507
508 vlan->vid = vid;
509 atomic_set(&vlan->refcount, 1);
510
b8cbd81d
AQ
511 atomic_set(&vlan->ap_isolation, 0);
512
90f4435d
AQ
513 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
514 if (err) {
515 kfree(vlan);
516 return err;
517 }
518
5d2c05b2
AQ
519 /* add a new TT local entry. This one will be marked with the NOPURGE
520 * flag
521 */
522 batadv_tt_local_add(bat_priv->soft_iface,
523 bat_priv->soft_iface->dev_addr, vid,
9464d071 524 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
5d2c05b2
AQ
525
526 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
527 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
528 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
529
530 return 0;
531}
532
533/**
534 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
535 * @bat_priv: the bat priv with all the soft interface information
536 * @vlan: the object to remove
537 */
538static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
539 struct batadv_softif_vlan *vlan)
540{
541 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
542 hlist_del_rcu(&vlan->list);
543 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
544
90f4435d
AQ
545 batadv_sysfs_del_vlan(bat_priv, vlan);
546
5d2c05b2
AQ
547 /* explicitly remove the associated TT local entry because it is marked
548 * with the NOPURGE flag
549 */
550 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
551 vlan->vid, "vlan interface destroyed", false);
552
553 batadv_softif_vlan_free_ref(vlan);
554}
555
556/**
557 * batadv_interface_add_vid - ndo_add_vid API implementation
558 * @dev: the netdev of the mesh interface
559 * @vid: identifier of the new vlan
560 *
561 * Set up all the internal structures for handling the new vlan on top of the
562 * mesh interface
563 *
564 * Returns 0 on success or a negative error code in case of failure.
565 */
566static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
567 unsigned short vid)
568{
569 struct batadv_priv *bat_priv = netdev_priv(dev);
570
571 /* only 802.1Q vlans are supported.
572 * batman-adv does not know how to handle other types
573 */
574 if (proto != htons(ETH_P_8021Q))
575 return -EINVAL;
576
577 vid |= BATADV_VLAN_HAS_TAG;
578
579 return batadv_softif_create_vlan(bat_priv, vid);
580}
581
582/**
583 * batadv_interface_kill_vid - ndo_kill_vid API implementation
584 * @dev: the netdev of the mesh interface
585 * @vid: identifier of the deleted vlan
586 *
587 * Destroy all the internal structures used to handle the vlan identified by vid
588 * on top of the mesh interface
589 *
590 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
591 * or -ENOENT if the specified vlan id wasn't registered.
592 */
593static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
594 unsigned short vid)
595{
596 struct batadv_priv *bat_priv = netdev_priv(dev);
597 struct batadv_softif_vlan *vlan;
598
599 /* only 802.1Q vlans are supported. batman-adv does not know how to
600 * handle other types
601 */
602 if (proto != htons(ETH_P_8021Q))
603 return -EINVAL;
604
605 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
606 if (!vlan)
607 return -ENOENT;
608
609 batadv_softif_destroy_vlan(bat_priv, vlan);
610
611 /* finally free the vlan object */
612 batadv_softif_vlan_free_ref(vlan);
613
614 return 0;
615}
616
36c1d153
SE
617/* batman-adv network devices have devices nesting below it and are a special
618 * "super class" of normal network devices; split their locks off into a
619 * separate class since they always nest.
620 */
621static struct lock_class_key batadv_netdev_xmit_lock_key;
622static struct lock_class_key batadv_netdev_addr_lock_key;
623
624/**
625 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
626 * @dev: device which owns the tx queue
627 * @txq: tx queue to modify
628 * @_unused: always NULL
629 */
630static void batadv_set_lockdep_class_one(struct net_device *dev,
631 struct netdev_queue *txq,
632 void *_unused)
633{
634 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
635}
636
637/**
638 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
639 * @dev: network device to modify
640 */
641static void batadv_set_lockdep_class(struct net_device *dev)
642{
643 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
644 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
645}
646
5bc44dc8
SW
647/**
648 * batadv_softif_destroy_finish - cleans up the remains of a softif
649 * @work: work queue item
650 *
651 * Free the parts of the soft interface which can not be removed under
652 * rtnl lock (to prevent deadlock situations).
653 */
654static void batadv_softif_destroy_finish(struct work_struct *work)
655{
5d2c05b2 656 struct batadv_softif_vlan *vlan;
5bc44dc8
SW
657 struct batadv_priv *bat_priv;
658 struct net_device *soft_iface;
659
660 bat_priv = container_of(work, struct batadv_priv,
661 cleanup_work);
662 soft_iface = bat_priv->soft_iface;
663
5d2c05b2
AQ
664 /* destroy the "untagged" VLAN */
665 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
666 if (vlan) {
667 batadv_softif_destroy_vlan(bat_priv, vlan);
668 batadv_softif_vlan_free_ref(vlan);
669 }
670
5bc44dc8 671 batadv_sysfs_del_meshif(soft_iface);
af63fde5 672 unregister_netdev(soft_iface);
5bc44dc8
SW
673}
674
37130293
SE
675/**
676 * batadv_softif_init_late - late stage initialization of soft interface
677 * @dev: registered network device to modify
678 *
679 * Returns error code on failures
680 */
681static int batadv_softif_init_late(struct net_device *dev)
c6c8fea2 682{
56303d34 683 struct batadv_priv *bat_priv;
ee75ed88 684 uint32_t random_seqno;
c6c8fea2 685 int ret;
d69909d2 686 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
c6c8fea2 687
37130293 688 batadv_set_lockdep_class(dev);
c6c8fea2 689
37130293
SE
690 bat_priv = netdev_priv(dev);
691 bat_priv->soft_iface = dev;
5bc44dc8 692 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
1c9b0550
ML
693
694 /* batadv_interface_stats() needs to be available as soon as
695 * register_netdevice() has been called
696 */
697 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
698 if (!bat_priv->bat_counters)
37130293 699 return -ENOMEM;
c6c8fea2 700
c6c8fea2
SE
701 atomic_set(&bat_priv->aggregated_ogms, 1);
702 atomic_set(&bat_priv->bonding, 0);
fa706554 703#ifdef CONFIG_BATMAN_ADV_BLA
23721387 704 atomic_set(&bat_priv->bridge_loop_avoidance, 0);
fa706554 705#endif
33af49ad
AQ
706#ifdef CONFIG_BATMAN_ADV_DAT
707 atomic_set(&bat_priv->distributed_arp_table, 1);
60432d75
LL
708#endif
709#ifdef CONFIG_BATMAN_ADV_MCAST
710 bat_priv->mcast.flags = BATADV_NO_FLAGS;
1d8ab8d3 711 atomic_set(&bat_priv->multicast_mode, 1);
60432d75 712 atomic_set(&bat_priv->mcast.num_disabled, 0);
ab49886e 713 atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
4c8755d6
LL
714 atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
715 atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
33af49ad 716#endif
cd646ab1 717 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
c6c8fea2 718 atomic_set(&bat_priv->gw_sel_class, 20);
414254e3
ML
719 atomic_set(&bat_priv->gw.bandwidth_down, 100);
720 atomic_set(&bat_priv->gw.bandwidth_up, 20);
c6c8fea2 721 atomic_set(&bat_priv->orig_interval, 1000);
c0398768 722 atomic_set(&bat_priv->hop_penalty, 15);
0c430d0d 723#ifdef CONFIG_BATMAN_ADV_DEBUG
c6c8fea2 724 atomic_set(&bat_priv->log_level, 0);
0c430d0d 725#endif
c6c8fea2 726 atomic_set(&bat_priv->fragmentation, 1);
a19d3d85 727 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
42d0b044
SE
728 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
729 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
c6c8fea2 730
39c75a51 731 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
c6c8fea2 732 atomic_set(&bat_priv->bcast_seqno, 1);
807736f6
SE
733 atomic_set(&bat_priv->tt.vn, 0);
734 atomic_set(&bat_priv->tt.local_changes, 0);
735 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
736#ifdef CONFIG_BATMAN_ADV_BLA
737 atomic_set(&bat_priv->bla.num_requests, 0);
738#endif
739 bat_priv->tt.last_changeset = NULL;
740 bat_priv->tt.last_changeset_len = 0;
c42edfe3
AQ
741 bat_priv->isolation_mark = 0;
742 bat_priv->isolation_mark_mask = 0;
c6c8fea2 743
ee75ed88
MH
744 /* randomize initial seqno to avoid collision */
745 get_random_bytes(&random_seqno, sizeof(random_seqno));
746 atomic_set(&bat_priv->frag_seqno, random_seqno);
747
c6c8fea2
SE
748 bat_priv->primary_if = NULL;
749 bat_priv->num_ifaces = 0;
c6c8fea2 750
d353d8d4
MH
751 batadv_nc_init_bat_priv(bat_priv);
752
37130293 753 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
c6c8fea2 754 if (ret < 0)
37130293 755 goto free_bat_counters;
c6c8fea2 756
37130293 757 ret = batadv_debugfs_add_meshif(dev);
c6c8fea2 758 if (ret < 0)
37130293 759 goto free_bat_counters;
c6c8fea2 760
37130293 761 ret = batadv_mesh_init(dev);
c6c8fea2
SE
762 if (ret < 0)
763 goto unreg_debugfs;
764
37130293 765 return 0;
c6c8fea2
SE
766
767unreg_debugfs:
37130293 768 batadv_debugfs_del_meshif(dev);
1c9b0550
ML
769free_bat_counters:
770 free_percpu(bat_priv->bat_counters);
f69ae770 771 bat_priv->bat_counters = NULL;
37130293
SE
772
773 return ret;
774}
775
3dbd550b
SE
776/**
777 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
778 * @dev: batadv_soft_interface used as master interface
779 * @slave_dev: net_device which should become the slave interface
780 *
781 * Return 0 if successful or error otherwise.
782 */
783static int batadv_softif_slave_add(struct net_device *dev,
784 struct net_device *slave_dev)
785{
786 struct batadv_hard_iface *hard_iface;
787 int ret = -EINVAL;
788
789 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
790 if (!hard_iface || hard_iface->soft_iface != NULL)
791 goto out;
792
793 ret = batadv_hardif_enable_interface(hard_iface, dev->name);
794
795out:
796 if (hard_iface)
797 batadv_hardif_free_ref(hard_iface);
798 return ret;
799}
800
801/**
802 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
803 * @dev: batadv_soft_interface used as master interface
804 * @slave_dev: net_device which should be removed from the master interface
805 *
806 * Return 0 if successful or error otherwise.
807 */
808static int batadv_softif_slave_del(struct net_device *dev,
809 struct net_device *slave_dev)
810{
811 struct batadv_hard_iface *hard_iface;
812 int ret = -EINVAL;
813
814 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
815
816 if (!hard_iface || hard_iface->soft_iface != dev)
817 goto out;
818
819 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
820 ret = 0;
821
822out:
823 if (hard_iface)
824 batadv_hardif_free_ref(hard_iface);
825 return ret;
826}
827
37130293
SE
828static const struct net_device_ops batadv_netdev_ops = {
829 .ndo_init = batadv_softif_init_late,
830 .ndo_open = batadv_interface_open,
831 .ndo_stop = batadv_interface_release,
832 .ndo_get_stats = batadv_interface_stats,
5d2c05b2
AQ
833 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
834 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
37130293
SE
835 .ndo_set_mac_address = batadv_interface_set_mac_addr,
836 .ndo_change_mtu = batadv_interface_change_mtu,
a4deee1a 837 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
37130293 838 .ndo_start_xmit = batadv_interface_tx,
3dbd550b
SE
839 .ndo_validate_addr = eth_validate_addr,
840 .ndo_add_slave = batadv_softif_slave_add,
841 .ndo_del_slave = batadv_softif_slave_del,
37130293
SE
842};
843
b3246020
SE
844/**
845 * batadv_softif_free - Deconstructor of batadv_soft_interface
846 * @dev: Device to cleanup and remove
847 */
848static void batadv_softif_free(struct net_device *dev)
849{
850 batadv_debugfs_del_meshif(dev);
851 batadv_mesh_free(dev);
0c501345
AQ
852
853 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
854 * their tasks. Wait for them all to be finished before freeing the
855 * netdev and its private data (bat_priv)
856 */
857 rcu_barrier();
858
b3246020
SE
859 free_netdev(dev);
860}
861
37130293
SE
862/**
863 * batadv_softif_init_early - early stage initialization of soft interface
864 * @dev: registered network device to modify
865 */
866static void batadv_softif_init_early(struct net_device *dev)
867{
868 struct batadv_priv *priv = netdev_priv(dev);
869
870 ether_setup(dev);
871
872 dev->netdev_ops = &batadv_netdev_ops;
b3246020 873 dev->destructor = batadv_softif_free;
5d2c05b2 874 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
37130293
SE
875 dev->tx_queue_len = 0;
876
877 /* can't call min_mtu, because the needed variables
878 * have not been initialized yet
879 */
880 dev->mtu = ETH_DATA_LEN;
881 /* reserve more space in the skbuff for our header */
411d6ed9 882 dev->hard_header_len = batadv_max_header_len();
37130293
SE
883
884 /* generate random address */
885 eth_hw_addr_random(dev);
886
7ad24ea4 887 dev->ethtool_ops = &batadv_ethtool_ops;
37130293
SE
888
889 memset(priv, 0, sizeof(*priv));
890}
891
892struct net_device *batadv_softif_create(const char *name)
893{
894 struct net_device *soft_iface;
895 int ret;
896
897 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
898 batadv_softif_init_early);
899 if (!soft_iface)
900 return NULL;
901
a4ac28c0
SE
902 soft_iface->rtnl_link_ops = &batadv_link_ops;
903
37130293
SE
904 ret = register_netdevice(soft_iface);
905 if (ret < 0) {
906 pr_err("Unable to register the batman interface '%s': %i\n",
907 name, ret);
908 free_netdev(soft_iface);
909 return NULL;
910 }
911
912 return soft_iface;
c6c8fea2
SE
913}
914
e07932ae
ML
915/**
916 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
917 * @soft_iface: the to-be-removed batman-adv interface
918 */
919void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
c6c8fea2 920{
5bc44dc8
SW
921 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
922
5bc44dc8 923 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
c6c8fea2
SE
924}
925
a4ac28c0
SE
926/**
927 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
928 * @soft_iface: the to-be-removed batman-adv interface
929 * @head: list pointer
930 */
931static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
932 struct list_head *head)
933{
934 struct batadv_hard_iface *hard_iface;
935
936 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
937 if (hard_iface->soft_iface == soft_iface)
938 batadv_hardif_disable_interface(hard_iface,
939 BATADV_IF_CLEANUP_KEEP);
940 }
941
942 batadv_sysfs_del_meshif(soft_iface);
943 unregister_netdevice_queue(soft_iface, head);
944}
945
04b482a2 946int batadv_softif_is_valid(const struct net_device *net_dev)
e44d8fe2 947{
0294ca0d 948 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
e44d8fe2 949 return 1;
e44d8fe2
SE
950
951 return 0;
952}
953
a4ac28c0
SE
954struct rtnl_link_ops batadv_link_ops __read_mostly = {
955 .kind = "batadv",
956 .priv_size = sizeof(struct batadv_priv),
957 .setup = batadv_softif_init_early,
958 .dellink = batadv_softif_destroy_netlink,
959};
960
c6c8fea2 961/* ethtool */
0294ca0d 962static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
c6c8fea2
SE
963{
964 cmd->supported = 0;
965 cmd->advertising = 0;
70739497 966 ethtool_cmd_speed_set(cmd, SPEED_10);
c6c8fea2
SE
967 cmd->duplex = DUPLEX_FULL;
968 cmd->port = PORT_TP;
969 cmd->phy_address = 0;
970 cmd->transceiver = XCVR_INTERNAL;
971 cmd->autoneg = AUTONEG_DISABLE;
972 cmd->maxtxpkt = 0;
973 cmd->maxrxpkt = 0;
974
975 return 0;
976}
977
0294ca0d
SE
978static void batadv_get_drvinfo(struct net_device *dev,
979 struct ethtool_drvinfo *info)
c6c8fea2 980{
7826d43f
JP
981 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
982 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
983 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
984 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
c6c8fea2
SE
985}
986
0294ca0d 987static u32 batadv_get_msglevel(struct net_device *dev)
c6c8fea2
SE
988{
989 return -EOPNOTSUPP;
990}
991
0294ca0d 992static void batadv_set_msglevel(struct net_device *dev, u32 value)
c6c8fea2
SE
993{
994}
995
0294ca0d 996static u32 batadv_get_link(struct net_device *dev)
c6c8fea2
SE
997{
998 return 1;
999}
f8214865
MH
1000
1001/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1002 * Declare each description string in struct.name[] to get fixed sized buffer
1003 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1004 */
1005static const struct {
1006 const char name[ETH_GSTRING_LEN];
0294ca0d 1007} batadv_counters_strings[] = {
1c9b0550
ML
1008 { "tx" },
1009 { "tx_bytes" },
1010 { "tx_dropped" },
1011 { "rx" },
1012 { "rx_bytes" },
f8214865
MH
1013 { "forward" },
1014 { "forward_bytes" },
1015 { "mgmt_tx" },
1016 { "mgmt_tx_bytes" },
1017 { "mgmt_rx" },
1018 { "mgmt_rx_bytes" },
ee75ed88
MH
1019 { "frag_tx" },
1020 { "frag_tx_bytes" },
610bfc6b
MH
1021 { "frag_rx" },
1022 { "frag_rx_bytes" },
1023 { "frag_fwd" },
1024 { "frag_fwd_bytes" },
f8214865
MH
1025 { "tt_request_tx" },
1026 { "tt_request_rx" },
1027 { "tt_response_tx" },
1028 { "tt_response_rx" },
1029 { "tt_roam_adv_tx" },
1030 { "tt_roam_adv_rx" },
4046b24a
MH
1031#ifdef CONFIG_BATMAN_ADV_DAT
1032 { "dat_get_tx" },
1033 { "dat_get_rx" },
1034 { "dat_put_tx" },
1035 { "dat_put_rx" },
1036 { "dat_cached_reply_tx" },
1037#endif
3c12de9a
MH
1038#ifdef CONFIG_BATMAN_ADV_NC
1039 { "nc_code" },
1040 { "nc_code_bytes" },
1041 { "nc_recode" },
1042 { "nc_recode_bytes" },
612d2b4f 1043 { "nc_buffer" },
2df5278b
MH
1044 { "nc_decode" },
1045 { "nc_decode_bytes" },
1046 { "nc_decode_failed" },
1047 { "nc_sniffed" },
3c12de9a 1048#endif
f8214865
MH
1049};
1050
1051static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
1052 uint8_t *data)
1053{
1054 if (stringset == ETH_SS_STATS)
0294ca0d
SE
1055 memcpy(data, batadv_counters_strings,
1056 sizeof(batadv_counters_strings));
f8214865
MH
1057}
1058
1059static void batadv_get_ethtool_stats(struct net_device *dev,
1060 struct ethtool_stats *stats,
1061 uint64_t *data)
1062{
56303d34 1063 struct batadv_priv *bat_priv = netdev_priv(dev);
f8214865
MH
1064 int i;
1065
d69909d2 1066 for (i = 0; i < BATADV_CNT_NUM; i++)
f8214865
MH
1067 data[i] = batadv_sum_counter(bat_priv, i);
1068}
1069
1070static int batadv_get_sset_count(struct net_device *dev, int stringset)
1071{
1072 if (stringset == ETH_SS_STATS)
d69909d2 1073 return BATADV_CNT_NUM;
f8214865
MH
1074
1075 return -EOPNOTSUPP;
1076}