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ac79cbb9 | 1 | /* Copyright (C) 2007-2017 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 | ||
c6c8fea2 | 18 | #include "soft-interface.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
22 | #include <linux/byteorder/generic.h> | |
23 | #include <linux/cache.h> | |
24 | #include <linux/compiler.h> | |
c408c1b9 | 25 | #include <linux/cpumask.h> |
1e2c2a4f | 26 | #include <linux/errno.h> |
c6c8fea2 | 27 | #include <linux/etherdevice.h> |
1e2c2a4f SE |
28 | #include <linux/ethtool.h> |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
c6c8fea2 | 31 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
32 | #include <linux/jiffies.h> |
33 | #include <linux/kernel.h> | |
6be4d30c | 34 | #include <linux/kref.h> |
1e2c2a4f SE |
35 | #include <linux/list.h> |
36 | #include <linux/lockdep.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/percpu.h> | |
39 | #include <linux/printk.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <linux/rcupdate.h> | |
569c9850 | 43 | #include <linux/rtnetlink.h> |
1e2c2a4f SE |
44 | #include <linux/skbuff.h> |
45 | #include <linux/slab.h> | |
46 | #include <linux/socket.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/stddef.h> | |
49 | #include <linux/string.h> | |
50 | #include <linux/types.h> | |
1e2c2a4f | 51 | |
01d350d1 | 52 | #include "bat_algo.h" |
23721387 | 53 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
54 | #include "debugfs.h" |
55 | #include "distributed-arp-table.h" | |
56 | #include "gateway_client.h" | |
57 | #include "gateway_common.h" | |
58 | #include "hard-interface.h" | |
59 | #include "multicast.h" | |
d353d8d4 | 60 | #include "network-coding.h" |
f19dc777 | 61 | #include "originator.h" |
1e2c2a4f SE |
62 | #include "packet.h" |
63 | #include "send.h" | |
64 | #include "sysfs.h" | |
65 | #include "translation-table.h" | |
c6c8fea2 | 66 | |
04b482a2 | 67 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
68 | { |
69 | int result; | |
70 | ||
9cfc7bd6 | 71 | /* TODO: We must check if we can release all references to non-payload |
242c1a28 | 72 | * data using __skb_header_release in our skbs to allow skb_cow_header to |
c6c8fea2 SE |
73 | * work optimally. This means that those skbs are not allowed to read |
74 | * or write any data which is before the current position of skb->data | |
75 | * after that call and thus allow other skbs with the same data buffer | |
76 | * to write freely in that area. | |
77 | */ | |
78 | result = skb_cow_head(skb, len); | |
79 | if (result < 0) | |
80 | return result; | |
81 | ||
82 | skb_push(skb, len); | |
83 | return 0; | |
84 | } | |
85 | ||
0294ca0d | 86 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
87 | { |
88 | netif_start_queue(dev); | |
89 | return 0; | |
90 | } | |
91 | ||
0294ca0d | 92 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
93 | { |
94 | netif_stop_queue(dev); | |
95 | return 0; | |
96 | } | |
97 | ||
c408c1b9 SE |
98 | /** |
99 | * batadv_sum_counter - Sum the cpu-local counters for index 'idx' | |
100 | * @bat_priv: the bat priv with all the soft interface information | |
101 | * @idx: index of counter to sum up | |
102 | * | |
103 | * Return: sum of all cpu-local counters | |
104 | */ | |
105 | static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) | |
106 | { | |
107 | u64 *counters, sum = 0; | |
108 | int cpu; | |
109 | ||
110 | for_each_possible_cpu(cpu) { | |
111 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
112 | sum += counters[idx]; | |
113 | } | |
114 | ||
115 | return sum; | |
116 | } | |
117 | ||
0294ca0d | 118 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 119 | { |
56303d34 | 120 | struct batadv_priv *bat_priv = netdev_priv(dev); |
ab044f8e | 121 | struct net_device_stats *stats = &dev->stats; |
1c9b0550 ML |
122 | |
123 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
124 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
125 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
126 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
127 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
128 | return stats; | |
c6c8fea2 SE |
129 | } |
130 | ||
0294ca0d | 131 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 132 | { |
56303d34 | 133 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 134 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 135 | struct sockaddr *addr = p; |
6b5e971a | 136 | u8 old_addr[ETH_ALEN]; |
c6c8fea2 SE |
137 | |
138 | if (!is_valid_ether_addr(addr->sa_data)) | |
139 | return -EADDRNOTAVAIL; | |
140 | ||
8fdd0153 AQ |
141 | ether_addr_copy(old_addr, dev->dev_addr); |
142 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 143 | |
015758d0 | 144 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
145 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
146 | return 0; | |
147 | ||
148 | rcu_read_lock(); | |
149 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
150 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 151 | "mac address changed", false); |
94d1dd87 | 152 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 153 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 154 | } |
94d1dd87 | 155 | rcu_read_unlock(); |
c6c8fea2 | 156 | |
c6c8fea2 SE |
157 | return 0; |
158 | } | |
159 | ||
0294ca0d | 160 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
161 | { |
162 | /* check ranges */ | |
9563877e | 163 | if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) |
c6c8fea2 SE |
164 | return -EINVAL; |
165 | ||
166 | dev->mtu = new_mtu; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
a4deee1a LL |
171 | /** |
172 | * batadv_interface_set_rx_mode - set the rx mode of a device | |
173 | * @dev: registered network device to modify | |
174 | * | |
175 | * We do not actually need to set any rx filters for the virtual batman | |
176 | * soft interface. However a dummy handler enables a user to set static | |
177 | * multicast listeners for instance. | |
178 | */ | |
179 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
180 | { | |
181 | } | |
182 | ||
0294ca0d SE |
183 | static int batadv_interface_tx(struct sk_buff *skb, |
184 | struct net_device *soft_iface) | |
c6c8fea2 | 185 | { |
c018ad3d | 186 | struct ethhdr *ethhdr; |
56303d34 SE |
187 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
188 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 189 | struct batadv_bcast_packet *bcast_packet; |
6b5e971a SE |
190 | static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
191 | 0x00, 0x00}; | |
192 | static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
193 | 0x00, 0x00}; | |
6c413b1c | 194 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
6b5e971a | 195 | u8 *dst_hint = NULL, chaddr[ETH_ALEN]; |
c018ad3d | 196 | struct vlan_ethhdr *vhdr; |
be7af5cf | 197 | unsigned int header_len = 0; |
c6c8fea2 | 198 | int data_len = skb->len, ret; |
c018ad3d | 199 | unsigned long brd_delay = 1; |
a19d3d85 | 200 | bool do_bcast = false, client_added; |
c018ad3d | 201 | unsigned short vid; |
6b5e971a | 202 | u32 seqno; |
6c413b1c | 203 | int gw_mode; |
1d8ab8d3 LL |
204 | enum batadv_forw_mode forw_mode; |
205 | struct batadv_orig_node *mcast_single_orig = NULL; | |
53cf037b | 206 | int network_offset = ETH_HLEN; |
c6c8fea2 | 207 | |
39c75a51 | 208 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
209 | goto dropped; |
210 | ||
e2d9ba43 LL |
211 | /* reset control block to avoid left overs from previous users */ |
212 | memset(skb->cb, 0, sizeof(struct batadv_skb_cb)); | |
213 | ||
860e9538 | 214 | netif_trans_update(soft_iface); |
c018ad3d | 215 | vid = batadv_get_vid(skb, 0); |
927c2ed7 | 216 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
217 | |
218 | switch (ntohs(ethhdr->h_proto)) { | |
219 | case ETH_P_8021Q: | |
927c2ed7 | 220 | vhdr = vlan_eth_hdr(skb); |
c6c8fea2 | 221 | |
9d1601ef ML |
222 | /* drop batman-in-batman packets to prevent loops */ |
223 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { | |
53cf037b | 224 | network_offset += VLAN_HLEN; |
c6c8fea2 | 225 | break; |
53cf037b | 226 | } |
c6c8fea2 SE |
227 | |
228 | /* fall through */ | |
af5d4f77 | 229 | case ETH_P_BATMAN: |
c6c8fea2 | 230 | goto dropped; |
a7f6ee94 | 231 | } |
c6c8fea2 | 232 | |
53cf037b LL |
233 | skb_set_network_header(skb, network_offset); |
234 | ||
08adf151 | 235 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
236 | goto dropped; |
237 | ||
9d2c9488 | 238 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 239 | ethhdr = eth_hdr(skb); |
9d2c9488 | 240 | |
a73105b8 | 241 | /* Register the client MAC in the transtable */ |
d3e9768a SW |
242 | if (!is_multicast_ether_addr(ethhdr->h_source) && |
243 | !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) { | |
a19d3d85 | 244 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, |
9464d071 AQ |
245 | vid, skb->skb_iif, |
246 | skb->mark); | |
a19d3d85 ML |
247 | if (!client_added) |
248 | goto dropped; | |
249 | } | |
c6c8fea2 | 250 | |
b1a8c04b SW |
251 | /* don't accept stp packets. STP does not help in meshes. |
252 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
253 | * |
254 | * The same goes for ECTP sent at least by some Cisco Switches, | |
255 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 256 | */ |
1eda58bf | 257 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
258 | goto dropped; |
259 | ||
4934ab95 SW |
260 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
261 | goto dropped; | |
262 | ||
3a24a63e | 263 | gw_mode = atomic_read(&bat_priv->gw.mode); |
be7af5cf | 264 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
265 | /* if gw mode is off, broadcast every packet */ |
266 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
267 | do_bcast = true; | |
268 | goto send; | |
be7af5cf | 269 | } |
9d2c9488 | 270 | |
6c413b1c AQ |
271 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
272 | chaddr); | |
273 | /* skb->data may have been modified by | |
274 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 275 | */ |
927c2ed7 | 276 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
277 | /* if gw_mode is on, broadcast any non-DHCP message. |
278 | * All the DHCP packets are going to be sent as unicast | |
279 | */ | |
280 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
281 | do_bcast = true; | |
282 | goto send; | |
283 | } | |
284 | ||
285 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
286 | dst_hint = chaddr; | |
287 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
288 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
289 | /* gateways should not forward any DHCP message if | |
290 | * directed to a DHCP server | |
291 | */ | |
292 | goto dropped; | |
c6c8fea2 | 293 | |
6c413b1c | 294 | send: |
1d8ab8d3 LL |
295 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
296 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
297 | &mcast_single_orig); | |
298 | if (forw_mode == BATADV_FORW_NONE) | |
299 | goto dropped; | |
300 | ||
301 | if (forw_mode == BATADV_FORW_SINGLE) | |
302 | do_bcast = false; | |
303 | } | |
304 | } | |
305 | ||
c54f38c9 SW |
306 | batadv_skb_set_priority(skb, 0); |
307 | ||
c6c8fea2 SE |
308 | /* ethernet packet should be broadcasted */ |
309 | if (do_bcast) { | |
e5d89254 | 310 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 311 | if (!primary_if) |
c6c8fea2 SE |
312 | goto dropped; |
313 | ||
c384ea3e AQ |
314 | /* in case of ARP request, we do not immediately broadcasti the |
315 | * packet, instead we first wait for DAT to try to retrieve the | |
316 | * correct ARP entry | |
317 | */ | |
318 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
319 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
320 | ||
04b482a2 | 321 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
322 | goto dropped; |
323 | ||
96412690 | 324 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
325 | bcast_packet->version = BATADV_COMPAT_VERSION; |
326 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
327 | |
328 | /* batman packet type: broadcast */ | |
a40d9b07 | 329 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 330 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
331 | |
332 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
333 | * this mac is known throughout the mesh |
334 | */ | |
8fdd0153 AQ |
335 | ether_addr_copy(bcast_packet->orig, |
336 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
337 | |
338 | /* set broadcast sequence number */ | |
bbb1f90e SE |
339 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
340 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 341 | |
3111beed | 342 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true); |
c6c8fea2 SE |
343 | |
344 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
345 | * the original skb. |
346 | */ | |
bd687fe4 | 347 | consume_skb(skb); |
c6c8fea2 SE |
348 | |
349 | /* unicast packet */ | |
350 | } else { | |
6c413b1c AQ |
351 | /* DHCP packets going to a server will use the GW feature */ |
352 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 353 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
354 | if (ret) |
355 | goto dropped; | |
e300d314 | 356 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
357 | } else if (mcast_single_orig) { |
358 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
359 | BATADV_UNICAST, 0, | |
360 | mcast_single_orig, vid); | |
6c413b1c AQ |
361 | } else { |
362 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
363 | skb)) | |
364 | goto dropped; | |
e300d314 | 365 | |
6c413b1c AQ |
366 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
367 | ||
368 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
369 | vid); | |
370 | } | |
eaac2c87 | 371 | if (ret != NET_XMIT_SUCCESS) |
c6c8fea2 SE |
372 | goto dropped_freed; |
373 | } | |
374 | ||
1c9b0550 ML |
375 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
376 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
377 | goto end; |
378 | ||
379 | dropped: | |
380 | kfree_skb(skb); | |
381 | dropped_freed: | |
1c9b0550 | 382 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 383 | end: |
f19dc777 SE |
384 | if (mcast_single_orig) |
385 | batadv_orig_node_put(mcast_single_orig); | |
32ae9b22 | 386 | if (primary_if) |
82047ad7 | 387 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
388 | return NETDEV_TX_OK; |
389 | } | |
390 | ||
f298cb94 SE |
391 | /** |
392 | * batadv_interface_rx - receive ethernet frame on local batman-adv interface | |
393 | * @soft_iface: local interface which will receive the ethernet frame | |
394 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
395 | * @hdr_size: size of already parsed batman-adv header |
396 | * @orig_node: originator from which the batman-adv packet was sent | |
397 | * | |
398 | * Sends a ethernet frame to the receive path of the local @soft_iface. | |
399 | * skb->data has still point to the batman-adv header with the size @hdr_size. | |
400 | * The caller has to have parsed this header already and made sure that at least | |
401 | * @hdr_size bytes are still available for pull in @skb. | |
402 | * | |
403 | * The packet may still get dropped. This can happen when the encapsulated | |
404 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
405 | * unicast packets will be dropped directly when it was sent between two | |
406 | * isolated clients. | |
407 | */ | |
04b482a2 | 408 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
409 | struct sk_buff *skb, int hdr_size, |
410 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 411 | { |
a40d9b07 | 412 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 413 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
414 | struct vlan_ethhdr *vhdr; |
415 | struct ethhdr *ethhdr; | |
416 | unsigned short vid; | |
2d3f6ccc SW |
417 | bool is_bcast; |
418 | ||
a40d9b07 SW |
419 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
420 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 | 421 | |
c6c8fea2 SE |
422 | skb_pull_rcsum(skb, hdr_size); |
423 | skb_reset_mac_header(skb); | |
424 | ||
55883fd1 AQ |
425 | /* clean the netfilter state now that the batman-adv header has been |
426 | * removed | |
427 | */ | |
428 | nf_reset(skb); | |
429 | ||
c7829666 SE |
430 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
431 | goto dropped; | |
432 | ||
2b1e2cb3 | 433 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 434 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
435 | |
436 | switch (ntohs(ethhdr->h_proto)) { | |
437 | case ETH_P_8021Q: | |
c7829666 SE |
438 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
439 | goto dropped; | |
440 | ||
c6c8fea2 | 441 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 442 | |
9d1601ef ML |
443 | /* drop batman-in-batman packets to prevent loops */ |
444 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
445 | break; |
446 | ||
447 | /* fall through */ | |
af5d4f77 | 448 | case ETH_P_BATMAN: |
c6c8fea2 SE |
449 | goto dropped; |
450 | } | |
451 | ||
c6c8fea2 | 452 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 SE |
453 | skb->protocol = eth_type_trans(skb, soft_iface); |
454 | ||
25985edc | 455 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 456 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
457 | * -- Dec 21st 2009, Simon Wunderlich |
458 | */ | |
c6c8fea2 | 459 | |
9cfc7bd6 | 460 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 461 | |
1c9b0550 ML |
462 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
463 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
464 | skb->len + ETH_HLEN); | |
c6c8fea2 | 465 | |
74490f96 AQ |
466 | /* Let the bridge loop avoidance check the packet. If will |
467 | * not handle it, we can safely push it up. | |
468 | */ | |
469 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
470 | goto out; | |
471 | ||
37135173 AQ |
472 | if (orig_node) |
473 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 474 | ethhdr->h_source, vid); |
37135173 | 475 | |
42cb0bef AQ |
476 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
477 | /* set the mark on broadcast packets if AP isolation is ON and | |
478 | * the packet is coming from an "isolated" client | |
479 | */ | |
480 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
481 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
482 | vid)) { | |
483 | /* save bits in skb->mark not covered by the mask and | |
484 | * apply the mark on the rest | |
485 | */ | |
486 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
487 | skb->mark |= bat_priv->isolation_mark; | |
488 | } | |
489 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
490 | ethhdr->h_dest, vid)) { | |
59b699cd | 491 | goto dropped; |
42cb0bef | 492 | } |
59b699cd | 493 | |
c6c8fea2 | 494 | netif_rx(skb); |
ba85fac2 | 495 | goto out; |
c6c8fea2 SE |
496 | |
497 | dropped: | |
498 | kfree_skb(skb); | |
499 | out: | |
500 | return; | |
501 | } | |
502 | ||
6be4d30c SE |
503 | /** |
504 | * batadv_softif_vlan_release - release vlan from lists and queue for free after | |
505 | * rcu grace period | |
506 | * @ref: kref pointer of the vlan object | |
507 | */ | |
508 | static void batadv_softif_vlan_release(struct kref *ref) | |
509 | { | |
510 | struct batadv_softif_vlan *vlan; | |
511 | ||
512 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
513 | ||
514 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
515 | hlist_del_rcu(&vlan->list); | |
516 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
517 | ||
518 | kfree_rcu(vlan, rcu); | |
519 | } | |
520 | ||
5d2c05b2 | 521 | /** |
9c3bf081 | 522 | * batadv_softif_vlan_put - decrease the vlan object refcounter and |
6be4d30c | 523 | * possibly release it |
e51f0397 | 524 | * @vlan: the vlan object to release |
5d2c05b2 | 525 | */ |
9c3bf081 | 526 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 527 | { |
354136bc ML |
528 | if (!vlan) |
529 | return; | |
530 | ||
6be4d30c | 531 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
532 | } |
533 | ||
534 | /** | |
535 | * batadv_softif_vlan_get - get the vlan object for a specific vid | |
536 | * @bat_priv: the bat priv with all the soft interface information | |
537 | * @vid: the identifier of the vlan object to retrieve | |
538 | * | |
62fe710f | 539 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
540 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
541 | */ | |
90f4435d AQ |
542 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
543 | unsigned short vid) | |
5d2c05b2 AQ |
544 | { |
545 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
546 | ||
547 | rcu_read_lock(); | |
548 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
549 | if (vlan_tmp->vid != vid) | |
550 | continue; | |
551 | ||
6be4d30c | 552 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
553 | continue; |
554 | ||
555 | vlan = vlan_tmp; | |
556 | break; | |
557 | } | |
558 | rcu_read_unlock(); | |
559 | ||
560 | return vlan; | |
561 | } | |
562 | ||
563 | /** | |
6d030de8 | 564 | * batadv_softif_create_vlan - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
565 | * @bat_priv: the bat priv with all the soft interface information |
566 | * @vid: the VLAN identifier | |
567 | * | |
62fe710f | 568 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
569 | */ |
570 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
571 | { | |
572 | struct batadv_softif_vlan *vlan; | |
90f4435d | 573 | int err; |
5d2c05b2 AQ |
574 | |
575 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
576 | if (vlan) { | |
9c3bf081 | 577 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
578 | return -EEXIST; |
579 | } | |
580 | ||
581 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
582 | if (!vlan) | |
583 | return -ENOMEM; | |
584 | ||
35df3b29 | 585 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 586 | vlan->vid = vid; |
6be4d30c | 587 | kref_init(&vlan->refcount); |
5d2c05b2 | 588 | |
b8cbd81d AQ |
589 | atomic_set(&vlan->ap_isolation, 0); |
590 | ||
90f4435d AQ |
591 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
592 | if (err) { | |
593 | kfree(vlan); | |
594 | return err; | |
595 | } | |
596 | ||
35df3b29 | 597 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
df28ca6b | 598 | kref_get(&vlan->refcount); |
35df3b29 AQ |
599 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); |
600 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
601 | ||
5d2c05b2 AQ |
602 | /* add a new TT local entry. This one will be marked with the NOPURGE |
603 | * flag | |
604 | */ | |
605 | batadv_tt_local_add(bat_priv->soft_iface, | |
606 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 607 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 608 | |
df28ca6b SE |
609 | /* don't return reference to new softif_vlan */ |
610 | batadv_softif_vlan_put(vlan); | |
611 | ||
5d2c05b2 AQ |
612 | return 0; |
613 | } | |
614 | ||
615 | /** | |
616 | * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object | |
617 | * @bat_priv: the bat priv with all the soft interface information | |
618 | * @vlan: the object to remove | |
619 | */ | |
620 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
621 | struct batadv_softif_vlan *vlan) | |
622 | { | |
5d2c05b2 AQ |
623 | /* explicitly remove the associated TT local entry because it is marked |
624 | * with the NOPURGE flag | |
625 | */ | |
626 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
627 | vlan->vid, "vlan interface destroyed", false); | |
628 | ||
35df3b29 | 629 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 630 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
631 | } |
632 | ||
633 | /** | |
634 | * batadv_interface_add_vid - ndo_add_vid API implementation | |
635 | * @dev: the netdev of the mesh interface | |
7afcbbef | 636 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
637 | * @vid: identifier of the new vlan |
638 | * | |
639 | * Set up all the internal structures for handling the new vlan on top of the | |
640 | * mesh interface | |
641 | * | |
62fe710f | 642 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
643 | */ |
644 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
645 | unsigned short vid) | |
646 | { | |
647 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
648 | struct batadv_softif_vlan *vlan; |
649 | int ret; | |
5d2c05b2 AQ |
650 | |
651 | /* only 802.1Q vlans are supported. | |
652 | * batman-adv does not know how to handle other types | |
653 | */ | |
654 | if (proto != htons(ETH_P_8021Q)) | |
655 | return -EINVAL; | |
656 | ||
657 | vid |= BATADV_VLAN_HAS_TAG; | |
658 | ||
35df3b29 AQ |
659 | /* if a new vlan is getting created and it already exists, it means that |
660 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
661 | * refcount in order to revive the object. | |
662 | * | |
663 | * if it does not exist then create it. | |
664 | */ | |
665 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
666 | if (!vlan) | |
667 | return batadv_softif_create_vlan(bat_priv, vid); | |
668 | ||
669 | /* recreate the sysfs object if it was already destroyed (and it should | |
670 | * be since we received a kill_vid() for this vlan | |
671 | */ | |
672 | if (!vlan->kobj) { | |
673 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
674 | if (ret) { | |
9c3bf081 | 675 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
676 | return ret; |
677 | } | |
678 | } | |
679 | ||
680 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
681 | * flag. This must be added again, even if the vlan object already | |
682 | * exists, because the entry was deleted by kill_vid() | |
683 | */ | |
684 | batadv_tt_local_add(bat_priv->soft_iface, | |
685 | bat_priv->soft_iface->dev_addr, vid, | |
686 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
687 | ||
688 | return 0; | |
5d2c05b2 AQ |
689 | } |
690 | ||
691 | /** | |
692 | * batadv_interface_kill_vid - ndo_kill_vid API implementation | |
693 | * @dev: the netdev of the mesh interface | |
7afcbbef | 694 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
695 | * @vid: identifier of the deleted vlan |
696 | * | |
697 | * Destroy all the internal structures used to handle the vlan identified by vid | |
698 | * on top of the mesh interface | |
699 | * | |
62fe710f | 700 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
701 | * or -ENOENT if the specified vlan id wasn't registered. |
702 | */ | |
703 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
704 | unsigned short vid) | |
705 | { | |
706 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
707 | struct batadv_softif_vlan *vlan; | |
708 | ||
709 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
710 | * handle other types | |
711 | */ | |
712 | if (proto != htons(ETH_P_8021Q)) | |
713 | return -EINVAL; | |
714 | ||
715 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
716 | if (!vlan) | |
717 | return -ENOENT; | |
718 | ||
719 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
720 | ||
721 | /* finally free the vlan object */ | |
9c3bf081 | 722 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
723 | |
724 | return 0; | |
725 | } | |
726 | ||
36c1d153 SE |
727 | /* batman-adv network devices have devices nesting below it and are a special |
728 | * "super class" of normal network devices; split their locks off into a | |
729 | * separate class since they always nest. | |
730 | */ | |
731 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
732 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
733 | ||
734 | /** | |
735 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
736 | * @dev: device which owns the tx queue | |
737 | * @txq: tx queue to modify | |
738 | * @_unused: always NULL | |
739 | */ | |
740 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
741 | struct netdev_queue *txq, | |
742 | void *_unused) | |
743 | { | |
744 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
745 | } | |
746 | ||
747 | /** | |
748 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
749 | * @dev: network device to modify | |
750 | */ | |
751 | static void batadv_set_lockdep_class(struct net_device *dev) | |
752 | { | |
753 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
754 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
755 | } | |
756 | ||
37130293 SE |
757 | /** |
758 | * batadv_softif_init_late - late stage initialization of soft interface | |
759 | * @dev: registered network device to modify | |
760 | * | |
62fe710f | 761 | * Return: error code on failures |
37130293 SE |
762 | */ |
763 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 764 | { |
56303d34 | 765 | struct batadv_priv *bat_priv; |
6b5e971a | 766 | u32 random_seqno; |
c6c8fea2 | 767 | int ret; |
6b5e971a | 768 | size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; |
c6c8fea2 | 769 | |
37130293 | 770 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 771 | |
37130293 SE |
772 | bat_priv = netdev_priv(dev); |
773 | bat_priv->soft_iface = dev; | |
1c9b0550 ML |
774 | |
775 | /* batadv_interface_stats() needs to be available as soon as | |
776 | * register_netdevice() has been called | |
777 | */ | |
6b5e971a | 778 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 779 | if (!bat_priv->bat_counters) |
37130293 | 780 | return -ENOMEM; |
c6c8fea2 | 781 | |
c6c8fea2 SE |
782 | atomic_set(&bat_priv->aggregated_ogms, 1); |
783 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 784 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 785 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 786 | #endif |
33af49ad AQ |
787 | #ifdef CONFIG_BATMAN_ADV_DAT |
788 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
789 | #endif |
790 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
72f7b2de LL |
791 | bat_priv->mcast.querier_ipv4.exists = false; |
792 | bat_priv->mcast.querier_ipv4.shadowing = false; | |
793 | bat_priv->mcast.querier_ipv6.exists = false; | |
794 | bat_priv->mcast.querier_ipv6.shadowing = false; | |
60432d75 | 795 | bat_priv->mcast.flags = BATADV_NO_FLAGS; |
1d8ab8d3 | 796 | atomic_set(&bat_priv->multicast_mode, 1); |
60432d75 | 797 | atomic_set(&bat_priv->mcast.num_disabled, 0); |
ab49886e | 798 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
799 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
800 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 801 | #endif |
3a24a63e | 802 | atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); |
414254e3 ML |
803 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
804 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 805 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 806 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 807 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 808 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 809 | #endif |
c6c8fea2 | 810 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 811 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
812 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
813 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 814 | |
39c75a51 | 815 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 816 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
817 | atomic_set(&bat_priv->tt.vn, 0); |
818 | atomic_set(&bat_priv->tt.local_changes, 0); | |
819 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
820 | #ifdef CONFIG_BATMAN_ADV_BLA | |
821 | atomic_set(&bat_priv->bla.num_requests, 0); | |
822 | #endif | |
33a3bb4a AQ |
823 | atomic_set(&bat_priv->tp_num, 0); |
824 | ||
807736f6 SE |
825 | bat_priv->tt.last_changeset = NULL; |
826 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
827 | bat_priv->isolation_mark = 0; |
828 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 829 | |
ee75ed88 MH |
830 | /* randomize initial seqno to avoid collision */ |
831 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
832 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
833 | ||
c6c8fea2 SE |
834 | bat_priv->primary_if = NULL; |
835 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 836 | |
d353d8d4 MH |
837 | batadv_nc_init_bat_priv(bat_priv); |
838 | ||
37130293 | 839 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 840 | if (ret < 0) |
37130293 | 841 | goto free_bat_counters; |
c6c8fea2 | 842 | |
37130293 | 843 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 844 | if (ret < 0) |
37130293 | 845 | goto free_bat_counters; |
c6c8fea2 | 846 | |
37130293 | 847 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
848 | if (ret < 0) |
849 | goto unreg_debugfs; | |
850 | ||
37130293 | 851 | return 0; |
c6c8fea2 SE |
852 | |
853 | unreg_debugfs: | |
37130293 | 854 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
855 | free_bat_counters: |
856 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 857 | bat_priv->bat_counters = NULL; |
37130293 SE |
858 | |
859 | return ret; | |
860 | } | |
861 | ||
3dbd550b SE |
862 | /** |
863 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
864 | * @dev: batadv_soft_interface used as master interface | |
865 | * @slave_dev: net_device which should become the slave interface | |
866 | * | |
62fe710f | 867 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
868 | */ |
869 | static int batadv_softif_slave_add(struct net_device *dev, | |
870 | struct net_device *slave_dev) | |
871 | { | |
872 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 873 | struct net *net = dev_net(dev); |
3dbd550b SE |
874 | int ret = -EINVAL; |
875 | ||
876 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 877 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
878 | goto out; |
879 | ||
2cd45a06 | 880 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
881 | |
882 | out: | |
883 | if (hard_iface) | |
82047ad7 | 884 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
885 | return ret; |
886 | } | |
887 | ||
888 | /** | |
889 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
890 | * @dev: batadv_soft_interface used as master interface | |
891 | * @slave_dev: net_device which should be removed from the master interface | |
892 | * | |
62fe710f | 893 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
894 | */ |
895 | static int batadv_softif_slave_del(struct net_device *dev, | |
896 | struct net_device *slave_dev) | |
897 | { | |
898 | struct batadv_hard_iface *hard_iface; | |
899 | int ret = -EINVAL; | |
900 | ||
901 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
902 | ||
903 | if (!hard_iface || hard_iface->soft_iface != dev) | |
904 | goto out; | |
905 | ||
906 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
907 | ret = 0; | |
908 | ||
909 | out: | |
910 | if (hard_iface) | |
82047ad7 | 911 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
912 | return ret; |
913 | } | |
914 | ||
37130293 SE |
915 | static const struct net_device_ops batadv_netdev_ops = { |
916 | .ndo_init = batadv_softif_init_late, | |
917 | .ndo_open = batadv_interface_open, | |
918 | .ndo_stop = batadv_interface_release, | |
919 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
920 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
921 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
922 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
923 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 924 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 925 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
926 | .ndo_validate_addr = eth_validate_addr, |
927 | .ndo_add_slave = batadv_softif_slave_add, | |
928 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
929 | }; |
930 | ||
5405e19e SE |
931 | static void batadv_get_drvinfo(struct net_device *dev, |
932 | struct ethtool_drvinfo *info) | |
933 | { | |
934 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); | |
935 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
936 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
937 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
938 | } | |
939 | ||
940 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
941 | * Declare each description string in struct.name[] to get fixed sized buffer | |
942 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
943 | */ | |
944 | static const struct { | |
945 | const char name[ETH_GSTRING_LEN]; | |
946 | } batadv_counters_strings[] = { | |
947 | { "tx" }, | |
948 | { "tx_bytes" }, | |
949 | { "tx_dropped" }, | |
950 | { "rx" }, | |
951 | { "rx_bytes" }, | |
952 | { "forward" }, | |
953 | { "forward_bytes" }, | |
954 | { "mgmt_tx" }, | |
955 | { "mgmt_tx_bytes" }, | |
956 | { "mgmt_rx" }, | |
957 | { "mgmt_rx_bytes" }, | |
958 | { "frag_tx" }, | |
959 | { "frag_tx_bytes" }, | |
960 | { "frag_rx" }, | |
961 | { "frag_rx_bytes" }, | |
962 | { "frag_fwd" }, | |
963 | { "frag_fwd_bytes" }, | |
964 | { "tt_request_tx" }, | |
965 | { "tt_request_rx" }, | |
966 | { "tt_response_tx" }, | |
967 | { "tt_response_rx" }, | |
968 | { "tt_roam_adv_tx" }, | |
969 | { "tt_roam_adv_rx" }, | |
970 | #ifdef CONFIG_BATMAN_ADV_DAT | |
971 | { "dat_get_tx" }, | |
972 | { "dat_get_rx" }, | |
973 | { "dat_put_tx" }, | |
974 | { "dat_put_rx" }, | |
975 | { "dat_cached_reply_tx" }, | |
976 | #endif | |
977 | #ifdef CONFIG_BATMAN_ADV_NC | |
978 | { "nc_code" }, | |
979 | { "nc_code_bytes" }, | |
980 | { "nc_recode" }, | |
981 | { "nc_recode_bytes" }, | |
982 | { "nc_buffer" }, | |
983 | { "nc_decode" }, | |
984 | { "nc_decode_bytes" }, | |
985 | { "nc_decode_failed" }, | |
986 | { "nc_sniffed" }, | |
987 | #endif | |
988 | }; | |
989 | ||
990 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
991 | { | |
992 | if (stringset == ETH_SS_STATS) | |
993 | memcpy(data, batadv_counters_strings, | |
994 | sizeof(batadv_counters_strings)); | |
995 | } | |
996 | ||
997 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
998 | struct ethtool_stats *stats, u64 *data) | |
999 | { | |
1000 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
1001 | int i; | |
1002 | ||
1003 | for (i = 0; i < BATADV_CNT_NUM; i++) | |
1004 | data[i] = batadv_sum_counter(bat_priv, i); | |
1005 | } | |
1006 | ||
1007 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1008 | { | |
1009 | if (stringset == ETH_SS_STATS) | |
1010 | return BATADV_CNT_NUM; | |
1011 | ||
1012 | return -EOPNOTSUPP; | |
1013 | } | |
1014 | ||
1015 | static const struct ethtool_ops batadv_ethtool_ops = { | |
1016 | .get_drvinfo = batadv_get_drvinfo, | |
1017 | .get_link = ethtool_op_get_link, | |
1018 | .get_strings = batadv_get_strings, | |
1019 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
1020 | .get_sset_count = batadv_get_sset_count, | |
1021 | }; | |
1022 | ||
b3246020 SE |
1023 | /** |
1024 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
1025 | * @dev: Device to cleanup and remove | |
1026 | */ | |
1027 | static void batadv_softif_free(struct net_device *dev) | |
1028 | { | |
1029 | batadv_debugfs_del_meshif(dev); | |
1030 | batadv_mesh_free(dev); | |
0c501345 AQ |
1031 | |
1032 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
1033 | * their tasks. Wait for them all to be finished before freeing the | |
1034 | * netdev and its private data (bat_priv) | |
1035 | */ | |
1036 | rcu_barrier(); | |
b3246020 SE |
1037 | } |
1038 | ||
37130293 SE |
1039 | /** |
1040 | * batadv_softif_init_early - early stage initialization of soft interface | |
1041 | * @dev: registered network device to modify | |
1042 | */ | |
1043 | static void batadv_softif_init_early(struct net_device *dev) | |
1044 | { | |
37130293 SE |
1045 | ether_setup(dev); |
1046 | ||
1047 | dev->netdev_ops = &batadv_netdev_ops; | |
cf124db5 DM |
1048 | dev->needs_free_netdev = true; |
1049 | dev->priv_destructor = batadv_softif_free; | |
0d21cdaa | 1050 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
cdf73703 | 1051 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
1052 | |
1053 | /* can't call min_mtu, because the needed variables | |
1054 | * have not been initialized yet | |
1055 | */ | |
1056 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
1057 | |
1058 | /* generate random address */ | |
1059 | eth_hw_addr_random(dev); | |
1060 | ||
7ad24ea4 | 1061 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
1062 | } |
1063 | ||
2cd45a06 | 1064 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
1065 | { |
1066 | struct net_device *soft_iface; | |
1067 | int ret; | |
1068 | ||
1069 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 1070 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
1071 | if (!soft_iface) |
1072 | return NULL; | |
1073 | ||
2cd45a06 AL |
1074 | dev_net_set(soft_iface, net); |
1075 | ||
a4ac28c0 SE |
1076 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1077 | ||
37130293 SE |
1078 | ret = register_netdevice(soft_iface); |
1079 | if (ret < 0) { | |
1080 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1081 | name, ret); | |
1082 | free_netdev(soft_iface); | |
1083 | return NULL; | |
1084 | } | |
1085 | ||
1086 | return soft_iface; | |
c6c8fea2 SE |
1087 | } |
1088 | ||
e07932ae ML |
1089 | /** |
1090 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
1091 | * @soft_iface: the to-be-removed batman-adv interface | |
1092 | */ | |
1093 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1094 | { |
5bc44dc8 | 1095 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
569c9850 SE |
1096 | struct batadv_softif_vlan *vlan; |
1097 | ||
1098 | ASSERT_RTNL(); | |
1099 | ||
1100 | /* destroy the "untagged" VLAN */ | |
1101 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1102 | if (vlan) { | |
1103 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1104 | batadv_softif_vlan_put(vlan); | |
1105 | } | |
5bc44dc8 | 1106 | |
569c9850 SE |
1107 | batadv_sysfs_del_meshif(soft_iface); |
1108 | unregister_netdevice(soft_iface); | |
c6c8fea2 SE |
1109 | } |
1110 | ||
a4ac28c0 SE |
1111 | /** |
1112 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
1113 | * @soft_iface: the to-be-removed batman-adv interface | |
1114 | * @head: list pointer | |
1115 | */ | |
1116 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1117 | struct list_head *head) | |
1118 | { | |
420cb1b7 | 1119 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
a4ac28c0 | 1120 | struct batadv_hard_iface *hard_iface; |
420cb1b7 | 1121 | struct batadv_softif_vlan *vlan; |
a4ac28c0 SE |
1122 | |
1123 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1124 | if (hard_iface->soft_iface == soft_iface) | |
1125 | batadv_hardif_disable_interface(hard_iface, | |
1126 | BATADV_IF_CLEANUP_KEEP); | |
1127 | } | |
1128 | ||
420cb1b7 SE |
1129 | /* destroy the "untagged" VLAN */ |
1130 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1131 | if (vlan) { | |
1132 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1133 | batadv_softif_vlan_put(vlan); | |
1134 | } | |
1135 | ||
a4ac28c0 SE |
1136 | batadv_sysfs_del_meshif(soft_iface); |
1137 | unregister_netdevice_queue(soft_iface, head); | |
1138 | } | |
1139 | ||
4b426b10 | 1140 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1141 | { |
0294ca0d | 1142 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1143 | return true; |
e44d8fe2 | 1144 | |
4b426b10 | 1145 | return false; |
e44d8fe2 SE |
1146 | } |
1147 | ||
a4ac28c0 SE |
1148 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1149 | .kind = "batadv", | |
1150 | .priv_size = sizeof(struct batadv_priv), | |
1151 | .setup = batadv_softif_init_early, | |
1152 | .dellink = batadv_softif_destroy_netlink, | |
1153 | }; |