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0b873931 | 1 | /* Copyright (C) 2007-2013 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 | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "soft-interface.h" | |
22 | #include "hard-interface.h" | |
c384ea3e | 23 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
24 | #include "routing.h" |
25 | #include "send.h" | |
b706b13b | 26 | #include "debugfs.h" |
c6c8fea2 | 27 | #include "translation-table.h" |
c6c8fea2 SE |
28 | #include "hash.h" |
29 | #include "gateway_common.h" | |
30 | #include "gateway_client.h" | |
b706b13b | 31 | #include "sysfs.h" |
43676ab5 | 32 | #include "originator.h" |
c6c8fea2 SE |
33 | #include <linux/slab.h> |
34 | #include <linux/ethtool.h> | |
35 | #include <linux/etherdevice.h> | |
36 | #include <linux/if_vlan.h> | |
af5d4f77 | 37 | #include <linux/if_ether.h> |
c6c8fea2 | 38 | #include "unicast.h" |
23721387 | 39 | #include "bridge_loop_avoidance.h" |
d353d8d4 | 40 | #include "network-coding.h" |
c6c8fea2 SE |
41 | |
42 | ||
0294ca0d SE |
43 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
44 | static void batadv_get_drvinfo(struct net_device *dev, | |
45 | struct ethtool_drvinfo *info); | |
46 | static u32 batadv_get_msglevel(struct net_device *dev); | |
47 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
48 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
49 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
50 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
51 | struct ethtool_stats *stats, u64 *data); | |
52 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 53 | |
0294ca0d SE |
54 | static const struct ethtool_ops batadv_ethtool_ops = { |
55 | .get_settings = batadv_get_settings, | |
56 | .get_drvinfo = batadv_get_drvinfo, | |
57 | .get_msglevel = batadv_get_msglevel, | |
58 | .set_msglevel = batadv_set_msglevel, | |
59 | .get_link = batadv_get_link, | |
f8214865 MH |
60 | .get_strings = batadv_get_strings, |
61 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
62 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
63 | }; |
64 | ||
04b482a2 | 65 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
66 | { |
67 | int result; | |
68 | ||
9cfc7bd6 | 69 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
70 | * data using skb_header_release in our skbs to allow skb_cow_header to |
71 | * work optimally. This means that those skbs are not allowed to read | |
72 | * or write any data which is before the current position of skb->data | |
73 | * after that call and thus allow other skbs with the same data buffer | |
74 | * to write freely in that area. | |
75 | */ | |
76 | result = skb_cow_head(skb, len); | |
77 | if (result < 0) | |
78 | return result; | |
79 | ||
80 | skb_push(skb, len); | |
81 | return 0; | |
82 | } | |
83 | ||
0294ca0d | 84 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
85 | { |
86 | netif_start_queue(dev); | |
87 | return 0; | |
88 | } | |
89 | ||
0294ca0d | 90 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
91 | { |
92 | netif_stop_queue(dev); | |
93 | return 0; | |
94 | } | |
95 | ||
0294ca0d | 96 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 97 | { |
56303d34 | 98 | struct batadv_priv *bat_priv = netdev_priv(dev); |
1c9b0550 ML |
99 | struct net_device_stats *stats = &bat_priv->stats; |
100 | ||
101 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
102 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
103 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
104 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
105 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
106 | return stats; | |
c6c8fea2 SE |
107 | } |
108 | ||
0294ca0d | 109 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 110 | { |
56303d34 | 111 | struct batadv_priv *bat_priv = netdev_priv(dev); |
c6c8fea2 | 112 | struct sockaddr *addr = p; |
40a3eb33 | 113 | uint8_t old_addr[ETH_ALEN]; |
c6c8fea2 SE |
114 | |
115 | if (!is_valid_ether_addr(addr->sa_data)) | |
116 | return -EADDRNOTAVAIL; | |
117 | ||
40a3eb33 D |
118 | memcpy(old_addr, dev->dev_addr, ETH_ALEN); |
119 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
120 | ||
015758d0 | 121 | /* only modify transtable if it has been initialized before */ |
39c75a51 | 122 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) { |
40a3eb33 | 123 | batadv_tt_local_remove(bat_priv, old_addr, |
08c36d3e | 124 | "mac address changed", false); |
42d0b044 | 125 | batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX); |
c6c8fea2 SE |
126 | } |
127 | ||
c6c8fea2 SE |
128 | return 0; |
129 | } | |
130 | ||
0294ca0d | 131 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
132 | { |
133 | /* check ranges */ | |
9563877e | 134 | if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) |
c6c8fea2 SE |
135 | return -EINVAL; |
136 | ||
137 | dev->mtu = new_mtu; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
0294ca0d SE |
142 | static int batadv_interface_tx(struct sk_buff *skb, |
143 | struct net_device *soft_iface) | |
c6c8fea2 SE |
144 | { |
145 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
56303d34 SE |
146 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
147 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 148 | struct batadv_bcast_packet *bcast_packet; |
c6c8fea2 | 149 | struct vlan_ethhdr *vhdr; |
af5d4f77 | 150 | __be16 ethertype = __constant_htons(ETH_P_BATMAN); |
4934ab95 SW |
151 | static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
152 | 0x00, 0x00}; | |
153 | static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
154 | 0x00, 0x00}; | |
be7af5cf | 155 | unsigned int header_len = 0; |
c6c8fea2 | 156 | int data_len = skb->len, ret; |
7a5cc242 | 157 | short vid __maybe_unused = -1; |
be7af5cf | 158 | bool do_bcast = false; |
bbb1f90e | 159 | uint32_t seqno; |
c384ea3e | 160 | unsigned long brd_delay = 1; |
c6c8fea2 | 161 | |
39c75a51 | 162 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
163 | goto dropped; |
164 | ||
165 | soft_iface->trans_start = jiffies; | |
166 | ||
167 | switch (ntohs(ethhdr->h_proto)) { | |
168 | case ETH_P_8021Q: | |
169 | vhdr = (struct vlan_ethhdr *)skb->data; | |
170 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
171 | ||
7e071c79 | 172 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
173 | break; |
174 | ||
175 | /* fall through */ | |
af5d4f77 | 176 | case ETH_P_BATMAN: |
c6c8fea2 | 177 | goto dropped; |
a7f6ee94 | 178 | } |
c6c8fea2 | 179 | |
08adf151 | 180 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
181 | goto dropped; |
182 | ||
a73105b8 | 183 | /* Register the client MAC in the transtable */ |
02233e0c LL |
184 | if (!is_multicast_ether_addr(ethhdr->h_source)) |
185 | batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); | |
c6c8fea2 | 186 | |
b1a8c04b SW |
187 | /* don't accept stp packets. STP does not help in meshes. |
188 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
189 | * |
190 | * The same goes for ECTP sent at least by some Cisco Switches, | |
191 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 192 | */ |
1eda58bf | 193 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
194 | goto dropped; |
195 | ||
4934ab95 SW |
196 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
197 | goto dropped; | |
198 | ||
be7af5cf ML |
199 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
200 | do_bcast = true; | |
c6c8fea2 | 201 | |
be7af5cf | 202 | switch (atomic_read(&bat_priv->gw_mode)) { |
cd646ab1 | 203 | case BATADV_GW_MODE_SERVER: |
be7af5cf | 204 | /* gateway servers should not send dhcp |
9cfc7bd6 SE |
205 | * requests into the mesh |
206 | */ | |
7cf06bc6 | 207 | ret = batadv_gw_is_dhcp_target(skb, &header_len); |
be7af5cf ML |
208 | if (ret) |
209 | goto dropped; | |
210 | break; | |
cd646ab1 | 211 | case BATADV_GW_MODE_CLIENT: |
be7af5cf | 212 | /* gateway clients should send dhcp requests |
9cfc7bd6 SE |
213 | * via unicast to their gateway |
214 | */ | |
7cf06bc6 | 215 | ret = batadv_gw_is_dhcp_target(skb, &header_len); |
be7af5cf ML |
216 | if (ret) |
217 | do_bcast = false; | |
218 | break; | |
cd646ab1 | 219 | case BATADV_GW_MODE_OFF: |
be7af5cf ML |
220 | default: |
221 | break; | |
222 | } | |
c6c8fea2 SE |
223 | } |
224 | ||
225 | /* ethernet packet should be broadcasted */ | |
226 | if (do_bcast) { | |
e5d89254 | 227 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 228 | if (!primary_if) |
c6c8fea2 SE |
229 | goto dropped; |
230 | ||
c384ea3e AQ |
231 | /* in case of ARP request, we do not immediately broadcasti the |
232 | * packet, instead we first wait for DAT to try to retrieve the | |
233 | * correct ARP entry | |
234 | */ | |
235 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
236 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
237 | ||
04b482a2 | 238 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
239 | goto dropped; |
240 | ||
96412690 | 241 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
7e071c79 | 242 | bcast_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 243 | bcast_packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
244 | |
245 | /* batman packet type: broadcast */ | |
acd34afa | 246 | bcast_packet->header.packet_type = BATADV_BCAST; |
162d549c | 247 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
248 | |
249 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
250 | * this mac is known throughout the mesh |
251 | */ | |
c6c8fea2 | 252 | memcpy(bcast_packet->orig, |
32ae9b22 | 253 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
254 | |
255 | /* set broadcast sequence number */ | |
bbb1f90e SE |
256 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
257 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 258 | |
c384ea3e | 259 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); |
c6c8fea2 SE |
260 | |
261 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
262 | * the original skb. |
263 | */ | |
c6c8fea2 SE |
264 | kfree_skb(skb); |
265 | ||
266 | /* unicast packet */ | |
267 | } else { | |
cd646ab1 | 268 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) { |
7cf06bc6 | 269 | ret = batadv_gw_out_of_range(bat_priv, skb, ethhdr); |
be7af5cf ML |
270 | if (ret) |
271 | goto dropped; | |
272 | } | |
273 | ||
c384ea3e AQ |
274 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) |
275 | goto dropped; | |
276 | ||
277 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); | |
278 | ||
7cdcf6dd | 279 | ret = batadv_unicast_send_skb(bat_priv, skb); |
c6c8fea2 SE |
280 | if (ret != 0) |
281 | goto dropped_freed; | |
282 | } | |
283 | ||
1c9b0550 ML |
284 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
285 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
286 | goto end; |
287 | ||
288 | dropped: | |
289 | kfree_skb(skb); | |
290 | dropped_freed: | |
1c9b0550 | 291 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 292 | end: |
32ae9b22 | 293 | if (primary_if) |
e5d89254 | 294 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
295 | return NETDEV_TX_OK; |
296 | } | |
297 | ||
04b482a2 | 298 | void batadv_interface_rx(struct net_device *soft_iface, |
56303d34 | 299 | struct sk_buff *skb, struct batadv_hard_iface *recv_if, |
37135173 | 300 | int hdr_size, struct batadv_orig_node *orig_node) |
c6c8fea2 | 301 | { |
56303d34 | 302 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c6c8fea2 SE |
303 | struct ethhdr *ethhdr; |
304 | struct vlan_ethhdr *vhdr; | |
04c9f416 | 305 | struct batadv_header *batadv_header = (struct batadv_header *)skb->data; |
7a5cc242 | 306 | short vid __maybe_unused = -1; |
af5d4f77 | 307 | __be16 ethertype = __constant_htons(ETH_P_BATMAN); |
2d3f6ccc SW |
308 | bool is_bcast; |
309 | ||
04c9f416 | 310 | is_bcast = (batadv_header->packet_type == BATADV_BCAST); |
c6c8fea2 SE |
311 | |
312 | /* check if enough space is available for pulling, and pull */ | |
313 | if (!pskb_may_pull(skb, hdr_size)) | |
314 | goto dropped; | |
315 | ||
316 | skb_pull_rcsum(skb, hdr_size); | |
317 | skb_reset_mac_header(skb); | |
318 | ||
319 | ethhdr = (struct ethhdr *)skb_mac_header(skb); | |
320 | ||
321 | switch (ntohs(ethhdr->h_proto)) { | |
322 | case ETH_P_8021Q: | |
323 | vhdr = (struct vlan_ethhdr *)skb->data; | |
324 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
325 | ||
7e071c79 | 326 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
327 | break; |
328 | ||
329 | /* fall through */ | |
af5d4f77 | 330 | case ETH_P_BATMAN: |
c6c8fea2 SE |
331 | goto dropped; |
332 | } | |
333 | ||
c6c8fea2 SE |
334 | /* skb->dev & skb->pkt_type are set here */ |
335 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
336 | goto dropped; | |
337 | skb->protocol = eth_type_trans(skb, soft_iface); | |
338 | ||
25985edc | 339 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 340 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
341 | * -- Dec 21st 2009, Simon Wunderlich |
342 | */ | |
c6c8fea2 | 343 | |
9cfc7bd6 | 344 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 345 | |
1c9b0550 ML |
346 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
347 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
348 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
349 | |
350 | soft_iface->last_rx = jiffies; | |
351 | ||
74490f96 AQ |
352 | /* Let the bridge loop avoidance check the packet. If will |
353 | * not handle it, we can safely push it up. | |
354 | */ | |
355 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
356 | goto out; | |
357 | ||
37135173 AQ |
358 | if (orig_node) |
359 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
360 | ethhdr->h_source); | |
361 | ||
08c36d3e | 362 | if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) |
59b699cd AQ |
363 | goto dropped; |
364 | ||
c6c8fea2 | 365 | netif_rx(skb); |
ba85fac2 | 366 | goto out; |
c6c8fea2 SE |
367 | |
368 | dropped: | |
369 | kfree_skb(skb); | |
370 | out: | |
371 | return; | |
372 | } | |
373 | ||
36c1d153 SE |
374 | /* batman-adv network devices have devices nesting below it and are a special |
375 | * "super class" of normal network devices; split their locks off into a | |
376 | * separate class since they always nest. | |
377 | */ | |
378 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
379 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
380 | ||
381 | /** | |
382 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
383 | * @dev: device which owns the tx queue | |
384 | * @txq: tx queue to modify | |
385 | * @_unused: always NULL | |
386 | */ | |
387 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
388 | struct netdev_queue *txq, | |
389 | void *_unused) | |
390 | { | |
391 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
392 | } | |
393 | ||
394 | /** | |
395 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
396 | * @dev: network device to modify | |
397 | */ | |
398 | static void batadv_set_lockdep_class(struct net_device *dev) | |
399 | { | |
400 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
401 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
402 | } | |
403 | ||
5bc44dc8 SW |
404 | /** |
405 | * batadv_softif_destroy_finish - cleans up the remains of a softif | |
406 | * @work: work queue item | |
407 | * | |
408 | * Free the parts of the soft interface which can not be removed under | |
409 | * rtnl lock (to prevent deadlock situations). | |
410 | */ | |
411 | static void batadv_softif_destroy_finish(struct work_struct *work) | |
412 | { | |
413 | struct batadv_priv *bat_priv; | |
414 | struct net_device *soft_iface; | |
415 | ||
416 | bat_priv = container_of(work, struct batadv_priv, | |
417 | cleanup_work); | |
418 | soft_iface = bat_priv->soft_iface; | |
419 | ||
5bc44dc8 SW |
420 | batadv_sysfs_del_meshif(soft_iface); |
421 | ||
422 | rtnl_lock(); | |
423 | unregister_netdevice(soft_iface); | |
424 | rtnl_unlock(); | |
425 | } | |
426 | ||
37130293 SE |
427 | /** |
428 | * batadv_softif_init_late - late stage initialization of soft interface | |
429 | * @dev: registered network device to modify | |
430 | * | |
431 | * Returns error code on failures | |
432 | */ | |
433 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 434 | { |
56303d34 | 435 | struct batadv_priv *bat_priv; |
c6c8fea2 | 436 | int ret; |
d69909d2 | 437 | size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM; |
c6c8fea2 | 438 | |
37130293 | 439 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 440 | |
37130293 SE |
441 | bat_priv = netdev_priv(dev); |
442 | bat_priv->soft_iface = dev; | |
5bc44dc8 | 443 | INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); |
1c9b0550 ML |
444 | |
445 | /* batadv_interface_stats() needs to be available as soon as | |
446 | * register_netdevice() has been called | |
447 | */ | |
448 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t)); | |
449 | if (!bat_priv->bat_counters) | |
37130293 | 450 | return -ENOMEM; |
c6c8fea2 | 451 | |
c6c8fea2 SE |
452 | atomic_set(&bat_priv->aggregated_ogms, 1); |
453 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 454 | #ifdef CONFIG_BATMAN_ADV_BLA |
23721387 | 455 | atomic_set(&bat_priv->bridge_loop_avoidance, 0); |
fa706554 | 456 | #endif |
33af49ad AQ |
457 | #ifdef CONFIG_BATMAN_ADV_DAT |
458 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
459 | #endif | |
59b699cd | 460 | atomic_set(&bat_priv->ap_isolation, 0); |
acd34afa | 461 | atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE); |
cd646ab1 | 462 | atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); |
c6c8fea2 SE |
463 | atomic_set(&bat_priv->gw_sel_class, 20); |
464 | atomic_set(&bat_priv->gw_bandwidth, 41); | |
465 | atomic_set(&bat_priv->orig_interval, 1000); | |
8681a1c4 | 466 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 467 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 468 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 469 | #endif |
c6c8fea2 | 470 | atomic_set(&bat_priv->fragmentation, 1); |
42d0b044 SE |
471 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
472 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 473 | |
39c75a51 | 474 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 475 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
476 | atomic_set(&bat_priv->tt.vn, 0); |
477 | atomic_set(&bat_priv->tt.local_changes, 0); | |
478 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
479 | #ifdef CONFIG_BATMAN_ADV_BLA | |
480 | atomic_set(&bat_priv->bla.num_requests, 0); | |
481 | #endif | |
482 | bat_priv->tt.last_changeset = NULL; | |
483 | bat_priv->tt.last_changeset_len = 0; | |
c6c8fea2 SE |
484 | |
485 | bat_priv->primary_if = NULL; | |
486 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 487 | |
d353d8d4 MH |
488 | batadv_nc_init_bat_priv(bat_priv); |
489 | ||
37130293 | 490 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 491 | if (ret < 0) |
37130293 | 492 | goto free_bat_counters; |
c6c8fea2 | 493 | |
37130293 | 494 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 495 | if (ret < 0) |
37130293 | 496 | goto free_bat_counters; |
c6c8fea2 | 497 | |
37130293 | 498 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
499 | if (ret < 0) |
500 | goto unreg_debugfs; | |
501 | ||
37130293 | 502 | return 0; |
c6c8fea2 SE |
503 | |
504 | unreg_debugfs: | |
37130293 | 505 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
506 | free_bat_counters: |
507 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 508 | bat_priv->bat_counters = NULL; |
37130293 SE |
509 | |
510 | return ret; | |
511 | } | |
512 | ||
3dbd550b SE |
513 | /** |
514 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
515 | * @dev: batadv_soft_interface used as master interface | |
516 | * @slave_dev: net_device which should become the slave interface | |
517 | * | |
518 | * Return 0 if successful or error otherwise. | |
519 | */ | |
520 | static int batadv_softif_slave_add(struct net_device *dev, | |
521 | struct net_device *slave_dev) | |
522 | { | |
523 | struct batadv_hard_iface *hard_iface; | |
524 | int ret = -EINVAL; | |
525 | ||
526 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
527 | if (!hard_iface || hard_iface->soft_iface != NULL) | |
528 | goto out; | |
529 | ||
530 | ret = batadv_hardif_enable_interface(hard_iface, dev->name); | |
531 | ||
532 | out: | |
533 | if (hard_iface) | |
534 | batadv_hardif_free_ref(hard_iface); | |
535 | return ret; | |
536 | } | |
537 | ||
538 | /** | |
539 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
540 | * @dev: batadv_soft_interface used as master interface | |
541 | * @slave_dev: net_device which should be removed from the master interface | |
542 | * | |
543 | * Return 0 if successful or error otherwise. | |
544 | */ | |
545 | static int batadv_softif_slave_del(struct net_device *dev, | |
546 | struct net_device *slave_dev) | |
547 | { | |
548 | struct batadv_hard_iface *hard_iface; | |
549 | int ret = -EINVAL; | |
550 | ||
551 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
552 | ||
553 | if (!hard_iface || hard_iface->soft_iface != dev) | |
554 | goto out; | |
555 | ||
556 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
557 | ret = 0; | |
558 | ||
559 | out: | |
560 | if (hard_iface) | |
561 | batadv_hardif_free_ref(hard_iface); | |
562 | return ret; | |
563 | } | |
564 | ||
37130293 SE |
565 | static const struct net_device_ops batadv_netdev_ops = { |
566 | .ndo_init = batadv_softif_init_late, | |
567 | .ndo_open = batadv_interface_open, | |
568 | .ndo_stop = batadv_interface_release, | |
569 | .ndo_get_stats = batadv_interface_stats, | |
570 | .ndo_set_mac_address = batadv_interface_set_mac_addr, | |
571 | .ndo_change_mtu = batadv_interface_change_mtu, | |
572 | .ndo_start_xmit = batadv_interface_tx, | |
3dbd550b SE |
573 | .ndo_validate_addr = eth_validate_addr, |
574 | .ndo_add_slave = batadv_softif_slave_add, | |
575 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
576 | }; |
577 | ||
b3246020 SE |
578 | /** |
579 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
580 | * @dev: Device to cleanup and remove | |
581 | */ | |
582 | static void batadv_softif_free(struct net_device *dev) | |
583 | { | |
584 | batadv_debugfs_del_meshif(dev); | |
585 | batadv_mesh_free(dev); | |
0c501345 AQ |
586 | |
587 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
588 | * their tasks. Wait for them all to be finished before freeing the | |
589 | * netdev and its private data (bat_priv) | |
590 | */ | |
591 | rcu_barrier(); | |
592 | ||
b3246020 SE |
593 | free_netdev(dev); |
594 | } | |
595 | ||
37130293 SE |
596 | /** |
597 | * batadv_softif_init_early - early stage initialization of soft interface | |
598 | * @dev: registered network device to modify | |
599 | */ | |
600 | static void batadv_softif_init_early(struct net_device *dev) | |
601 | { | |
602 | struct batadv_priv *priv = netdev_priv(dev); | |
603 | ||
604 | ether_setup(dev); | |
605 | ||
606 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 607 | dev->destructor = batadv_softif_free; |
37130293 SE |
608 | dev->tx_queue_len = 0; |
609 | ||
610 | /* can't call min_mtu, because the needed variables | |
611 | * have not been initialized yet | |
612 | */ | |
613 | dev->mtu = ETH_DATA_LEN; | |
614 | /* reserve more space in the skbuff for our header */ | |
615 | dev->hard_header_len = BATADV_HEADER_LEN; | |
616 | ||
617 | /* generate random address */ | |
618 | eth_hw_addr_random(dev); | |
619 | ||
620 | SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops); | |
621 | ||
622 | memset(priv, 0, sizeof(*priv)); | |
623 | } | |
624 | ||
625 | struct net_device *batadv_softif_create(const char *name) | |
626 | { | |
627 | struct net_device *soft_iface; | |
628 | int ret; | |
629 | ||
630 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
631 | batadv_softif_init_early); | |
632 | if (!soft_iface) | |
633 | return NULL; | |
634 | ||
a4ac28c0 SE |
635 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
636 | ||
37130293 SE |
637 | ret = register_netdevice(soft_iface); |
638 | if (ret < 0) { | |
639 | pr_err("Unable to register the batman interface '%s': %i\n", | |
640 | name, ret); | |
641 | free_netdev(soft_iface); | |
642 | return NULL; | |
643 | } | |
644 | ||
645 | return soft_iface; | |
c6c8fea2 SE |
646 | } |
647 | ||
e07932ae ML |
648 | /** |
649 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
650 | * @soft_iface: the to-be-removed batman-adv interface | |
651 | */ | |
652 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 653 | { |
5bc44dc8 SW |
654 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
655 | ||
5bc44dc8 | 656 | queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); |
c6c8fea2 SE |
657 | } |
658 | ||
a4ac28c0 SE |
659 | /** |
660 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
661 | * @soft_iface: the to-be-removed batman-adv interface | |
662 | * @head: list pointer | |
663 | */ | |
664 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
665 | struct list_head *head) | |
666 | { | |
667 | struct batadv_hard_iface *hard_iface; | |
668 | ||
669 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
670 | if (hard_iface->soft_iface == soft_iface) | |
671 | batadv_hardif_disable_interface(hard_iface, | |
672 | BATADV_IF_CLEANUP_KEEP); | |
673 | } | |
674 | ||
675 | batadv_sysfs_del_meshif(soft_iface); | |
676 | unregister_netdevice_queue(soft_iface, head); | |
677 | } | |
678 | ||
04b482a2 | 679 | int batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 680 | { |
0294ca0d | 681 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
e44d8fe2 | 682 | return 1; |
e44d8fe2 SE |
683 | |
684 | return 0; | |
685 | } | |
686 | ||
a4ac28c0 SE |
687 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
688 | .kind = "batadv", | |
689 | .priv_size = sizeof(struct batadv_priv), | |
690 | .setup = batadv_softif_init_early, | |
691 | .dellink = batadv_softif_destroy_netlink, | |
692 | }; | |
693 | ||
c6c8fea2 | 694 | /* ethtool */ |
0294ca0d | 695 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
696 | { |
697 | cmd->supported = 0; | |
698 | cmd->advertising = 0; | |
70739497 | 699 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
700 | cmd->duplex = DUPLEX_FULL; |
701 | cmd->port = PORT_TP; | |
702 | cmd->phy_address = 0; | |
703 | cmd->transceiver = XCVR_INTERNAL; | |
704 | cmd->autoneg = AUTONEG_DISABLE; | |
705 | cmd->maxtxpkt = 0; | |
706 | cmd->maxrxpkt = 0; | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
0294ca0d SE |
711 | static void batadv_get_drvinfo(struct net_device *dev, |
712 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 713 | { |
7826d43f JP |
714 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
715 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
716 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
717 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
718 | } |
719 | ||
0294ca0d | 720 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
721 | { |
722 | return -EOPNOTSUPP; | |
723 | } | |
724 | ||
0294ca0d | 725 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
726 | { |
727 | } | |
728 | ||
0294ca0d | 729 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
730 | { |
731 | return 1; | |
732 | } | |
f8214865 MH |
733 | |
734 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
735 | * Declare each description string in struct.name[] to get fixed sized buffer | |
736 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
737 | */ | |
738 | static const struct { | |
739 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 740 | } batadv_counters_strings[] = { |
1c9b0550 ML |
741 | { "tx" }, |
742 | { "tx_bytes" }, | |
743 | { "tx_dropped" }, | |
744 | { "rx" }, | |
745 | { "rx_bytes" }, | |
f8214865 MH |
746 | { "forward" }, |
747 | { "forward_bytes" }, | |
748 | { "mgmt_tx" }, | |
749 | { "mgmt_tx_bytes" }, | |
750 | { "mgmt_rx" }, | |
751 | { "mgmt_rx_bytes" }, | |
752 | { "tt_request_tx" }, | |
753 | { "tt_request_rx" }, | |
754 | { "tt_response_tx" }, | |
755 | { "tt_response_rx" }, | |
756 | { "tt_roam_adv_tx" }, | |
757 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
758 | #ifdef CONFIG_BATMAN_ADV_DAT |
759 | { "dat_get_tx" }, | |
760 | { "dat_get_rx" }, | |
761 | { "dat_put_tx" }, | |
762 | { "dat_put_rx" }, | |
763 | { "dat_cached_reply_tx" }, | |
764 | #endif | |
3c12de9a MH |
765 | #ifdef CONFIG_BATMAN_ADV_NC |
766 | { "nc_code" }, | |
767 | { "nc_code_bytes" }, | |
768 | { "nc_recode" }, | |
769 | { "nc_recode_bytes" }, | |
612d2b4f | 770 | { "nc_buffer" }, |
2df5278b MH |
771 | { "nc_decode" }, |
772 | { "nc_decode_bytes" }, | |
773 | { "nc_decode_failed" }, | |
774 | { "nc_sniffed" }, | |
3c12de9a | 775 | #endif |
f8214865 MH |
776 | }; |
777 | ||
778 | static void batadv_get_strings(struct net_device *dev, uint32_t stringset, | |
779 | uint8_t *data) | |
780 | { | |
781 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
782 | memcpy(data, batadv_counters_strings, |
783 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
784 | } |
785 | ||
786 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
787 | struct ethtool_stats *stats, | |
788 | uint64_t *data) | |
789 | { | |
56303d34 | 790 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
791 | int i; |
792 | ||
d69909d2 | 793 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
794 | data[i] = batadv_sum_counter(bat_priv, i); |
795 | } | |
796 | ||
797 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
798 | { | |
799 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 800 | return BATADV_CNT_NUM; |
f8214865 MH |
801 | |
802 | return -EOPNOTSUPP; | |
803 | } |