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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> | |
23721387 | 37 | #include "bridge_loop_avoidance.h" |
d353d8d4 | 38 | #include "network-coding.h" |
c6c8fea2 SE |
39 | |
40 | ||
0294ca0d SE |
41 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
42 | static void batadv_get_drvinfo(struct net_device *dev, | |
43 | struct ethtool_drvinfo *info); | |
44 | static u32 batadv_get_msglevel(struct net_device *dev); | |
45 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
46 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
47 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
48 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
49 | struct ethtool_stats *stats, u64 *data); | |
50 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 51 | |
0294ca0d SE |
52 | static const struct ethtool_ops batadv_ethtool_ops = { |
53 | .get_settings = batadv_get_settings, | |
54 | .get_drvinfo = batadv_get_drvinfo, | |
55 | .get_msglevel = batadv_get_msglevel, | |
56 | .set_msglevel = batadv_set_msglevel, | |
57 | .get_link = batadv_get_link, | |
f8214865 MH |
58 | .get_strings = batadv_get_strings, |
59 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
60 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
61 | }; |
62 | ||
04b482a2 | 63 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
64 | { |
65 | int result; | |
66 | ||
9cfc7bd6 | 67 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
68 | * data using skb_header_release in our skbs to allow skb_cow_header to |
69 | * work optimally. This means that those skbs are not allowed to read | |
70 | * or write any data which is before the current position of skb->data | |
71 | * after that call and thus allow other skbs with the same data buffer | |
72 | * to write freely in that area. | |
73 | */ | |
74 | result = skb_cow_head(skb, len); | |
75 | if (result < 0) | |
76 | return result; | |
77 | ||
78 | skb_push(skb, len); | |
79 | return 0; | |
80 | } | |
81 | ||
0294ca0d | 82 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
83 | { |
84 | netif_start_queue(dev); | |
85 | return 0; | |
86 | } | |
87 | ||
0294ca0d | 88 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
89 | { |
90 | netif_stop_queue(dev); | |
91 | return 0; | |
92 | } | |
93 | ||
0294ca0d | 94 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 95 | { |
56303d34 | 96 | struct batadv_priv *bat_priv = netdev_priv(dev); |
1c9b0550 ML |
97 | struct net_device_stats *stats = &bat_priv->stats; |
98 | ||
99 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
100 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
101 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
102 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
103 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
104 | return stats; | |
c6c8fea2 SE |
105 | } |
106 | ||
0294ca0d | 107 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 108 | { |
56303d34 | 109 | struct batadv_priv *bat_priv = netdev_priv(dev); |
c6c8fea2 | 110 | struct sockaddr *addr = p; |
40a3eb33 | 111 | uint8_t old_addr[ETH_ALEN]; |
c6c8fea2 SE |
112 | |
113 | if (!is_valid_ether_addr(addr->sa_data)) | |
114 | return -EADDRNOTAVAIL; | |
115 | ||
40a3eb33 D |
116 | memcpy(old_addr, dev->dev_addr, ETH_ALEN); |
117 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
118 | ||
015758d0 | 119 | /* only modify transtable if it has been initialized before */ |
39c75a51 | 120 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) { |
40a3eb33 | 121 | batadv_tt_local_remove(bat_priv, old_addr, |
08c36d3e | 122 | "mac address changed", false); |
42d0b044 | 123 | batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX); |
c6c8fea2 SE |
124 | } |
125 | ||
c6c8fea2 SE |
126 | return 0; |
127 | } | |
128 | ||
0294ca0d | 129 | static 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 | ||
0294ca0d SE |
140 | static int batadv_interface_tx(struct sk_buff *skb, |
141 | struct net_device *soft_iface) | |
c6c8fea2 SE |
142 | { |
143 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
56303d34 SE |
144 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
145 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 146 | struct batadv_bcast_packet *bcast_packet; |
c6c8fea2 | 147 | struct vlan_ethhdr *vhdr; |
293e9338 | 148 | __be16 ethertype = htons(ETH_P_BATMAN); |
4934ab95 SW |
149 | static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
150 | 0x00, 0x00}; | |
151 | static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
152 | 0x00, 0x00}; | |
be7af5cf | 153 | unsigned int header_len = 0; |
c6c8fea2 | 154 | int data_len = skb->len, ret; |
eb2deb6b | 155 | unsigned short vid __maybe_unused = BATADV_NO_FLAGS; |
be7af5cf | 156 | bool do_bcast = false; |
bbb1f90e | 157 | uint32_t seqno; |
c384ea3e | 158 | unsigned long brd_delay = 1; |
c6c8fea2 | 159 | |
39c75a51 | 160 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
161 | goto dropped; |
162 | ||
163 | soft_iface->trans_start = jiffies; | |
164 | ||
165 | switch (ntohs(ethhdr->h_proto)) { | |
166 | case ETH_P_8021Q: | |
167 | vhdr = (struct vlan_ethhdr *)skb->data; | |
168 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
4c18c425 | 169 | vid |= BATADV_VLAN_HAS_TAG; |
c6c8fea2 | 170 | |
7e071c79 | 171 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
172 | break; |
173 | ||
174 | /* fall through */ | |
af5d4f77 | 175 | case ETH_P_BATMAN: |
c6c8fea2 | 176 | goto dropped; |
a7f6ee94 | 177 | } |
c6c8fea2 | 178 | |
08adf151 | 179 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
180 | goto dropped; |
181 | ||
9d2c9488 LL |
182 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
183 | ethhdr = (struct ethhdr *)skb->data; | |
184 | ||
a73105b8 | 185 | /* Register the client MAC in the transtable */ |
02233e0c LL |
186 | if (!is_multicast_ether_addr(ethhdr->h_source)) |
187 | batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); | |
c6c8fea2 | 188 | |
b1a8c04b SW |
189 | /* don't accept stp packets. STP does not help in meshes. |
190 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
191 | * |
192 | * The same goes for ECTP sent at least by some Cisco Switches, | |
193 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 194 | */ |
1eda58bf | 195 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
196 | goto dropped; |
197 | ||
4934ab95 SW |
198 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
199 | goto dropped; | |
200 | ||
be7af5cf ML |
201 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
202 | do_bcast = true; | |
c6c8fea2 | 203 | |
be7af5cf | 204 | switch (atomic_read(&bat_priv->gw_mode)) { |
cd646ab1 | 205 | case BATADV_GW_MODE_SERVER: |
be7af5cf | 206 | /* gateway servers should not send dhcp |
9cfc7bd6 SE |
207 | * requests into the mesh |
208 | */ | |
7cf06bc6 | 209 | ret = batadv_gw_is_dhcp_target(skb, &header_len); |
be7af5cf ML |
210 | if (ret) |
211 | goto dropped; | |
212 | break; | |
cd646ab1 | 213 | case BATADV_GW_MODE_CLIENT: |
be7af5cf | 214 | /* gateway clients should send dhcp requests |
9cfc7bd6 SE |
215 | * via unicast to their gateway |
216 | */ | |
7cf06bc6 | 217 | ret = batadv_gw_is_dhcp_target(skb, &header_len); |
be7af5cf ML |
218 | if (ret) |
219 | do_bcast = false; | |
220 | break; | |
cd646ab1 | 221 | case BATADV_GW_MODE_OFF: |
be7af5cf ML |
222 | default: |
223 | break; | |
224 | } | |
9d2c9488 LL |
225 | |
226 | /* reminder: ethhdr might have become unusable from here on | |
227 | * (batadv_gw_is_dhcp_target() might have reallocated skb data) | |
228 | */ | |
c6c8fea2 SE |
229 | } |
230 | ||
c54f38c9 SW |
231 | batadv_skb_set_priority(skb, 0); |
232 | ||
c6c8fea2 SE |
233 | /* ethernet packet should be broadcasted */ |
234 | if (do_bcast) { | |
e5d89254 | 235 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 236 | if (!primary_if) |
c6c8fea2 SE |
237 | goto dropped; |
238 | ||
c384ea3e AQ |
239 | /* in case of ARP request, we do not immediately broadcasti the |
240 | * packet, instead we first wait for DAT to try to retrieve the | |
241 | * correct ARP entry | |
242 | */ | |
243 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
244 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
245 | ||
04b482a2 | 246 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
247 | goto dropped; |
248 | ||
96412690 | 249 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
7e071c79 | 250 | bcast_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 251 | bcast_packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
252 | |
253 | /* batman packet type: broadcast */ | |
acd34afa | 254 | bcast_packet->header.packet_type = BATADV_BCAST; |
162d549c | 255 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
256 | |
257 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
258 | * this mac is known throughout the mesh |
259 | */ | |
c6c8fea2 | 260 | memcpy(bcast_packet->orig, |
32ae9b22 | 261 | primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 SE |
262 | |
263 | /* set broadcast sequence number */ | |
bbb1f90e SE |
264 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
265 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 266 | |
c384ea3e | 267 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); |
c6c8fea2 SE |
268 | |
269 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
270 | * the original skb. |
271 | */ | |
c6c8fea2 SE |
272 | kfree_skb(skb); |
273 | ||
274 | /* unicast packet */ | |
275 | } else { | |
cd646ab1 | 276 | if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) { |
9d2c9488 | 277 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
278 | if (ret) |
279 | goto dropped; | |
280 | } | |
281 | ||
c384ea3e AQ |
282 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) |
283 | goto dropped; | |
284 | ||
285 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); | |
286 | ||
f097e25d | 287 | ret = batadv_send_skb_unicast(bat_priv, skb); |
c6c8fea2 SE |
288 | if (ret != 0) |
289 | goto dropped_freed; | |
290 | } | |
291 | ||
1c9b0550 ML |
292 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
293 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
294 | goto end; |
295 | ||
296 | dropped: | |
297 | kfree_skb(skb); | |
298 | dropped_freed: | |
1c9b0550 | 299 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 300 | end: |
32ae9b22 | 301 | if (primary_if) |
e5d89254 | 302 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
303 | return NETDEV_TX_OK; |
304 | } | |
305 | ||
04b482a2 | 306 | void batadv_interface_rx(struct net_device *soft_iface, |
56303d34 | 307 | struct sk_buff *skb, struct batadv_hard_iface *recv_if, |
37135173 | 308 | int hdr_size, struct batadv_orig_node *orig_node) |
c6c8fea2 | 309 | { |
56303d34 | 310 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c6c8fea2 SE |
311 | struct ethhdr *ethhdr; |
312 | struct vlan_ethhdr *vhdr; | |
04c9f416 | 313 | struct batadv_header *batadv_header = (struct batadv_header *)skb->data; |
eb2deb6b | 314 | unsigned short vid __maybe_unused = BATADV_NO_FLAGS; |
293e9338 | 315 | __be16 ethertype = htons(ETH_P_BATMAN); |
2d3f6ccc SW |
316 | bool is_bcast; |
317 | ||
04c9f416 | 318 | is_bcast = (batadv_header->packet_type == BATADV_BCAST); |
c6c8fea2 SE |
319 | |
320 | /* check if enough space is available for pulling, and pull */ | |
321 | if (!pskb_may_pull(skb, hdr_size)) | |
322 | goto dropped; | |
323 | ||
324 | skb_pull_rcsum(skb, hdr_size); | |
325 | skb_reset_mac_header(skb); | |
326 | ||
7ed4be95 | 327 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
328 | |
329 | switch (ntohs(ethhdr->h_proto)) { | |
330 | case ETH_P_8021Q: | |
331 | vhdr = (struct vlan_ethhdr *)skb->data; | |
332 | vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; | |
4c18c425 | 333 | vid |= BATADV_VLAN_HAS_TAG; |
c6c8fea2 | 334 | |
7e071c79 | 335 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
336 | break; |
337 | ||
338 | /* fall through */ | |
af5d4f77 | 339 | case ETH_P_BATMAN: |
c6c8fea2 SE |
340 | goto dropped; |
341 | } | |
342 | ||
c6c8fea2 SE |
343 | /* skb->dev & skb->pkt_type are set here */ |
344 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
345 | goto dropped; | |
346 | skb->protocol = eth_type_trans(skb, soft_iface); | |
347 | ||
25985edc | 348 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 349 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
350 | * -- Dec 21st 2009, Simon Wunderlich |
351 | */ | |
c6c8fea2 | 352 | |
9cfc7bd6 | 353 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 354 | |
1c9b0550 ML |
355 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
356 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
357 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
358 | |
359 | soft_iface->last_rx = jiffies; | |
360 | ||
74490f96 AQ |
361 | /* Let the bridge loop avoidance check the packet. If will |
362 | * not handle it, we can safely push it up. | |
363 | */ | |
364 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
365 | goto out; | |
366 | ||
37135173 AQ |
367 | if (orig_node) |
368 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
369 | ethhdr->h_source); | |
370 | ||
08c36d3e | 371 | if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) |
59b699cd AQ |
372 | goto dropped; |
373 | ||
c6c8fea2 | 374 | netif_rx(skb); |
ba85fac2 | 375 | goto out; |
c6c8fea2 SE |
376 | |
377 | dropped: | |
378 | kfree_skb(skb); | |
379 | out: | |
380 | return; | |
381 | } | |
382 | ||
36c1d153 SE |
383 | /* batman-adv network devices have devices nesting below it and are a special |
384 | * "super class" of normal network devices; split their locks off into a | |
385 | * separate class since they always nest. | |
386 | */ | |
387 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
388 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
389 | ||
390 | /** | |
391 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
392 | * @dev: device which owns the tx queue | |
393 | * @txq: tx queue to modify | |
394 | * @_unused: always NULL | |
395 | */ | |
396 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
397 | struct netdev_queue *txq, | |
398 | void *_unused) | |
399 | { | |
400 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
401 | } | |
402 | ||
403 | /** | |
404 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
405 | * @dev: network device to modify | |
406 | */ | |
407 | static void batadv_set_lockdep_class(struct net_device *dev) | |
408 | { | |
409 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
410 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
411 | } | |
412 | ||
5bc44dc8 SW |
413 | /** |
414 | * batadv_softif_destroy_finish - cleans up the remains of a softif | |
415 | * @work: work queue item | |
416 | * | |
417 | * Free the parts of the soft interface which can not be removed under | |
418 | * rtnl lock (to prevent deadlock situations). | |
419 | */ | |
420 | static void batadv_softif_destroy_finish(struct work_struct *work) | |
421 | { | |
422 | struct batadv_priv *bat_priv; | |
423 | struct net_device *soft_iface; | |
424 | ||
425 | bat_priv = container_of(work, struct batadv_priv, | |
426 | cleanup_work); | |
427 | soft_iface = bat_priv->soft_iface; | |
428 | ||
5bc44dc8 SW |
429 | batadv_sysfs_del_meshif(soft_iface); |
430 | ||
431 | rtnl_lock(); | |
432 | unregister_netdevice(soft_iface); | |
433 | rtnl_unlock(); | |
434 | } | |
435 | ||
37130293 SE |
436 | /** |
437 | * batadv_softif_init_late - late stage initialization of soft interface | |
438 | * @dev: registered network device to modify | |
439 | * | |
440 | * Returns error code on failures | |
441 | */ | |
442 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 443 | { |
56303d34 | 444 | struct batadv_priv *bat_priv; |
ee75ed88 | 445 | uint32_t random_seqno; |
c6c8fea2 | 446 | int ret; |
d69909d2 | 447 | size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM; |
c6c8fea2 | 448 | |
37130293 | 449 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 450 | |
37130293 SE |
451 | bat_priv = netdev_priv(dev); |
452 | bat_priv->soft_iface = dev; | |
5bc44dc8 | 453 | INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); |
1c9b0550 ML |
454 | |
455 | /* batadv_interface_stats() needs to be available as soon as | |
456 | * register_netdevice() has been called | |
457 | */ | |
458 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t)); | |
459 | if (!bat_priv->bat_counters) | |
37130293 | 460 | return -ENOMEM; |
c6c8fea2 | 461 | |
c6c8fea2 SE |
462 | atomic_set(&bat_priv->aggregated_ogms, 1); |
463 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 464 | #ifdef CONFIG_BATMAN_ADV_BLA |
23721387 | 465 | atomic_set(&bat_priv->bridge_loop_avoidance, 0); |
fa706554 | 466 | #endif |
33af49ad AQ |
467 | #ifdef CONFIG_BATMAN_ADV_DAT |
468 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
469 | #endif | |
59b699cd | 470 | atomic_set(&bat_priv->ap_isolation, 0); |
cd646ab1 | 471 | atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); |
c6c8fea2 | 472 | atomic_set(&bat_priv->gw_sel_class, 20); |
414254e3 ML |
473 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
474 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 475 | atomic_set(&bat_priv->orig_interval, 1000); |
8681a1c4 | 476 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 477 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 478 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 479 | #endif |
c6c8fea2 | 480 | atomic_set(&bat_priv->fragmentation, 1); |
42d0b044 SE |
481 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
482 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 483 | |
39c75a51 | 484 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 485 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
486 | atomic_set(&bat_priv->tt.vn, 0); |
487 | atomic_set(&bat_priv->tt.local_changes, 0); | |
488 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
489 | #ifdef CONFIG_BATMAN_ADV_BLA | |
490 | atomic_set(&bat_priv->bla.num_requests, 0); | |
491 | #endif | |
492 | bat_priv->tt.last_changeset = NULL; | |
493 | bat_priv->tt.last_changeset_len = 0; | |
c6c8fea2 | 494 | |
ee75ed88 MH |
495 | /* randomize initial seqno to avoid collision */ |
496 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
497 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
498 | ||
c6c8fea2 SE |
499 | bat_priv->primary_if = NULL; |
500 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 501 | |
d353d8d4 MH |
502 | batadv_nc_init_bat_priv(bat_priv); |
503 | ||
37130293 | 504 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 505 | if (ret < 0) |
37130293 | 506 | goto free_bat_counters; |
c6c8fea2 | 507 | |
37130293 | 508 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 509 | if (ret < 0) |
37130293 | 510 | goto free_bat_counters; |
c6c8fea2 | 511 | |
37130293 | 512 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
513 | if (ret < 0) |
514 | goto unreg_debugfs; | |
515 | ||
37130293 | 516 | return 0; |
c6c8fea2 SE |
517 | |
518 | unreg_debugfs: | |
37130293 | 519 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
520 | free_bat_counters: |
521 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 522 | bat_priv->bat_counters = NULL; |
37130293 SE |
523 | |
524 | return ret; | |
525 | } | |
526 | ||
3dbd550b SE |
527 | /** |
528 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
529 | * @dev: batadv_soft_interface used as master interface | |
530 | * @slave_dev: net_device which should become the slave interface | |
531 | * | |
532 | * Return 0 if successful or error otherwise. | |
533 | */ | |
534 | static int batadv_softif_slave_add(struct net_device *dev, | |
535 | struct net_device *slave_dev) | |
536 | { | |
537 | struct batadv_hard_iface *hard_iface; | |
538 | int ret = -EINVAL; | |
539 | ||
540 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
541 | if (!hard_iface || hard_iface->soft_iface != NULL) | |
542 | goto out; | |
543 | ||
544 | ret = batadv_hardif_enable_interface(hard_iface, dev->name); | |
545 | ||
546 | out: | |
547 | if (hard_iface) | |
548 | batadv_hardif_free_ref(hard_iface); | |
549 | return ret; | |
550 | } | |
551 | ||
552 | /** | |
553 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
554 | * @dev: batadv_soft_interface used as master interface | |
555 | * @slave_dev: net_device which should be removed from the master interface | |
556 | * | |
557 | * Return 0 if successful or error otherwise. | |
558 | */ | |
559 | static int batadv_softif_slave_del(struct net_device *dev, | |
560 | struct net_device *slave_dev) | |
561 | { | |
562 | struct batadv_hard_iface *hard_iface; | |
563 | int ret = -EINVAL; | |
564 | ||
565 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
566 | ||
567 | if (!hard_iface || hard_iface->soft_iface != dev) | |
568 | goto out; | |
569 | ||
570 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
571 | ret = 0; | |
572 | ||
573 | out: | |
574 | if (hard_iface) | |
575 | batadv_hardif_free_ref(hard_iface); | |
576 | return ret; | |
577 | } | |
578 | ||
37130293 SE |
579 | static const struct net_device_ops batadv_netdev_ops = { |
580 | .ndo_init = batadv_softif_init_late, | |
581 | .ndo_open = batadv_interface_open, | |
582 | .ndo_stop = batadv_interface_release, | |
583 | .ndo_get_stats = batadv_interface_stats, | |
584 | .ndo_set_mac_address = batadv_interface_set_mac_addr, | |
585 | .ndo_change_mtu = batadv_interface_change_mtu, | |
586 | .ndo_start_xmit = batadv_interface_tx, | |
3dbd550b SE |
587 | .ndo_validate_addr = eth_validate_addr, |
588 | .ndo_add_slave = batadv_softif_slave_add, | |
589 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
590 | }; |
591 | ||
b3246020 SE |
592 | /** |
593 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
594 | * @dev: Device to cleanup and remove | |
595 | */ | |
596 | static void batadv_softif_free(struct net_device *dev) | |
597 | { | |
598 | batadv_debugfs_del_meshif(dev); | |
599 | batadv_mesh_free(dev); | |
0c501345 AQ |
600 | |
601 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
602 | * their tasks. Wait for them all to be finished before freeing the | |
603 | * netdev and its private data (bat_priv) | |
604 | */ | |
605 | rcu_barrier(); | |
606 | ||
b3246020 SE |
607 | free_netdev(dev); |
608 | } | |
609 | ||
37130293 SE |
610 | /** |
611 | * batadv_softif_init_early - early stage initialization of soft interface | |
612 | * @dev: registered network device to modify | |
613 | */ | |
614 | static void batadv_softif_init_early(struct net_device *dev) | |
615 | { | |
616 | struct batadv_priv *priv = netdev_priv(dev); | |
617 | ||
618 | ether_setup(dev); | |
619 | ||
620 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 621 | dev->destructor = batadv_softif_free; |
37130293 SE |
622 | dev->tx_queue_len = 0; |
623 | ||
624 | /* can't call min_mtu, because the needed variables | |
625 | * have not been initialized yet | |
626 | */ | |
627 | dev->mtu = ETH_DATA_LEN; | |
628 | /* reserve more space in the skbuff for our header */ | |
411d6ed9 | 629 | dev->hard_header_len = batadv_max_header_len(); |
37130293 SE |
630 | |
631 | /* generate random address */ | |
632 | eth_hw_addr_random(dev); | |
633 | ||
634 | SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops); | |
635 | ||
636 | memset(priv, 0, sizeof(*priv)); | |
637 | } | |
638 | ||
639 | struct net_device *batadv_softif_create(const char *name) | |
640 | { | |
641 | struct net_device *soft_iface; | |
642 | int ret; | |
643 | ||
644 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
645 | batadv_softif_init_early); | |
646 | if (!soft_iface) | |
647 | return NULL; | |
648 | ||
a4ac28c0 SE |
649 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
650 | ||
37130293 SE |
651 | ret = register_netdevice(soft_iface); |
652 | if (ret < 0) { | |
653 | pr_err("Unable to register the batman interface '%s': %i\n", | |
654 | name, ret); | |
655 | free_netdev(soft_iface); | |
656 | return NULL; | |
657 | } | |
658 | ||
659 | return soft_iface; | |
c6c8fea2 SE |
660 | } |
661 | ||
e07932ae ML |
662 | /** |
663 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
664 | * @soft_iface: the to-be-removed batman-adv interface | |
665 | */ | |
666 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 667 | { |
5bc44dc8 SW |
668 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
669 | ||
5bc44dc8 | 670 | queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); |
c6c8fea2 SE |
671 | } |
672 | ||
a4ac28c0 SE |
673 | /** |
674 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
675 | * @soft_iface: the to-be-removed batman-adv interface | |
676 | * @head: list pointer | |
677 | */ | |
678 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
679 | struct list_head *head) | |
680 | { | |
681 | struct batadv_hard_iface *hard_iface; | |
682 | ||
683 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
684 | if (hard_iface->soft_iface == soft_iface) | |
685 | batadv_hardif_disable_interface(hard_iface, | |
686 | BATADV_IF_CLEANUP_KEEP); | |
687 | } | |
688 | ||
689 | batadv_sysfs_del_meshif(soft_iface); | |
690 | unregister_netdevice_queue(soft_iface, head); | |
691 | } | |
692 | ||
04b482a2 | 693 | int batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 694 | { |
0294ca0d | 695 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
e44d8fe2 | 696 | return 1; |
e44d8fe2 SE |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
a4ac28c0 SE |
701 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
702 | .kind = "batadv", | |
703 | .priv_size = sizeof(struct batadv_priv), | |
704 | .setup = batadv_softif_init_early, | |
705 | .dellink = batadv_softif_destroy_netlink, | |
706 | }; | |
707 | ||
c6c8fea2 | 708 | /* ethtool */ |
0294ca0d | 709 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
710 | { |
711 | cmd->supported = 0; | |
712 | cmd->advertising = 0; | |
70739497 | 713 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
714 | cmd->duplex = DUPLEX_FULL; |
715 | cmd->port = PORT_TP; | |
716 | cmd->phy_address = 0; | |
717 | cmd->transceiver = XCVR_INTERNAL; | |
718 | cmd->autoneg = AUTONEG_DISABLE; | |
719 | cmd->maxtxpkt = 0; | |
720 | cmd->maxrxpkt = 0; | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
0294ca0d SE |
725 | static void batadv_get_drvinfo(struct net_device *dev, |
726 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 727 | { |
7826d43f JP |
728 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
729 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
730 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
731 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
732 | } |
733 | ||
0294ca0d | 734 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
735 | { |
736 | return -EOPNOTSUPP; | |
737 | } | |
738 | ||
0294ca0d | 739 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
740 | { |
741 | } | |
742 | ||
0294ca0d | 743 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
744 | { |
745 | return 1; | |
746 | } | |
f8214865 MH |
747 | |
748 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
749 | * Declare each description string in struct.name[] to get fixed sized buffer | |
750 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
751 | */ | |
752 | static const struct { | |
753 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 754 | } batadv_counters_strings[] = { |
1c9b0550 ML |
755 | { "tx" }, |
756 | { "tx_bytes" }, | |
757 | { "tx_dropped" }, | |
758 | { "rx" }, | |
759 | { "rx_bytes" }, | |
f8214865 MH |
760 | { "forward" }, |
761 | { "forward_bytes" }, | |
762 | { "mgmt_tx" }, | |
763 | { "mgmt_tx_bytes" }, | |
764 | { "mgmt_rx" }, | |
765 | { "mgmt_rx_bytes" }, | |
ee75ed88 MH |
766 | { "frag_tx" }, |
767 | { "frag_tx_bytes" }, | |
610bfc6b MH |
768 | { "frag_rx" }, |
769 | { "frag_rx_bytes" }, | |
770 | { "frag_fwd" }, | |
771 | { "frag_fwd_bytes" }, | |
f8214865 MH |
772 | { "tt_request_tx" }, |
773 | { "tt_request_rx" }, | |
774 | { "tt_response_tx" }, | |
775 | { "tt_response_rx" }, | |
776 | { "tt_roam_adv_tx" }, | |
777 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
778 | #ifdef CONFIG_BATMAN_ADV_DAT |
779 | { "dat_get_tx" }, | |
780 | { "dat_get_rx" }, | |
781 | { "dat_put_tx" }, | |
782 | { "dat_put_rx" }, | |
783 | { "dat_cached_reply_tx" }, | |
784 | #endif | |
3c12de9a MH |
785 | #ifdef CONFIG_BATMAN_ADV_NC |
786 | { "nc_code" }, | |
787 | { "nc_code_bytes" }, | |
788 | { "nc_recode" }, | |
789 | { "nc_recode_bytes" }, | |
612d2b4f | 790 | { "nc_buffer" }, |
2df5278b MH |
791 | { "nc_decode" }, |
792 | { "nc_decode_bytes" }, | |
793 | { "nc_decode_failed" }, | |
794 | { "nc_sniffed" }, | |
3c12de9a | 795 | #endif |
f8214865 MH |
796 | }; |
797 | ||
798 | static void batadv_get_strings(struct net_device *dev, uint32_t stringset, | |
799 | uint8_t *data) | |
800 | { | |
801 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
802 | memcpy(data, batadv_counters_strings, |
803 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
804 | } |
805 | ||
806 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
807 | struct ethtool_stats *stats, | |
808 | uint64_t *data) | |
809 | { | |
56303d34 | 810 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
811 | int i; |
812 | ||
d69909d2 | 813 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
814 | data[i] = batadv_sum_counter(bat_priv, i); |
815 | } | |
816 | ||
817 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
818 | { | |
819 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 820 | return BATADV_CNT_NUM; |
f8214865 MH |
821 | |
822 | return -EOPNOTSUPP; | |
823 | } |