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0046b040 | 1 | /* Copyright (C) 2007-2016 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> | |
25 | #include <linux/errno.h> | |
c6c8fea2 | 26 | #include <linux/etherdevice.h> |
1e2c2a4f SE |
27 | #include <linux/ethtool.h> |
28 | #include <linux/fs.h> | |
29 | #include <linux/if_ether.h> | |
c6c8fea2 | 30 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
31 | #include <linux/jiffies.h> |
32 | #include <linux/kernel.h> | |
6be4d30c | 33 | #include <linux/kref.h> |
1e2c2a4f SE |
34 | #include <linux/list.h> |
35 | #include <linux/lockdep.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/percpu.h> | |
38 | #include <linux/printk.h> | |
39 | #include <linux/random.h> | |
40 | #include <linux/rculist.h> | |
41 | #include <linux/rcupdate.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/socket.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/stddef.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/workqueue.h> | |
50 | ||
01d350d1 | 51 | #include "bat_algo.h" |
23721387 | 52 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
53 | #include "debugfs.h" |
54 | #include "distributed-arp-table.h" | |
55 | #include "gateway_client.h" | |
56 | #include "gateway_common.h" | |
57 | #include "hard-interface.h" | |
58 | #include "multicast.h" | |
d353d8d4 | 59 | #include "network-coding.h" |
1e2c2a4f SE |
60 | #include "packet.h" |
61 | #include "send.h" | |
62 | #include "sysfs.h" | |
63 | #include "translation-table.h" | |
c6c8fea2 | 64 | |
0294ca0d SE |
65 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
66 | static void batadv_get_drvinfo(struct net_device *dev, | |
67 | struct ethtool_drvinfo *info); | |
68 | static u32 batadv_get_msglevel(struct net_device *dev); | |
69 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
70 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
71 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
72 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
73 | struct ethtool_stats *stats, u64 *data); | |
74 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 75 | |
0294ca0d SE |
76 | static const struct ethtool_ops batadv_ethtool_ops = { |
77 | .get_settings = batadv_get_settings, | |
78 | .get_drvinfo = batadv_get_drvinfo, | |
79 | .get_msglevel = batadv_get_msglevel, | |
80 | .set_msglevel = batadv_set_msglevel, | |
81 | .get_link = batadv_get_link, | |
f8214865 MH |
82 | .get_strings = batadv_get_strings, |
83 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
84 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
85 | }; |
86 | ||
04b482a2 | 87 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
88 | { |
89 | int result; | |
90 | ||
9cfc7bd6 | 91 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
92 | * data using skb_header_release in our skbs to allow skb_cow_header to |
93 | * work optimally. This means that those skbs are not allowed to read | |
94 | * or write any data which is before the current position of skb->data | |
95 | * after that call and thus allow other skbs with the same data buffer | |
96 | * to write freely in that area. | |
97 | */ | |
98 | result = skb_cow_head(skb, len); | |
99 | if (result < 0) | |
100 | return result; | |
101 | ||
102 | skb_push(skb, len); | |
103 | return 0; | |
104 | } | |
105 | ||
0294ca0d | 106 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
107 | { |
108 | netif_start_queue(dev); | |
109 | return 0; | |
110 | } | |
111 | ||
0294ca0d | 112 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
113 | { |
114 | netif_stop_queue(dev); | |
115 | return 0; | |
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); |
1c9b0550 ML |
121 | struct net_device_stats *stats = &bat_priv->stats; |
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 | ||
860e9538 | 211 | netif_trans_update(soft_iface); |
c018ad3d | 212 | vid = batadv_get_vid(skb, 0); |
927c2ed7 | 213 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
214 | |
215 | switch (ntohs(ethhdr->h_proto)) { | |
216 | case ETH_P_8021Q: | |
927c2ed7 | 217 | vhdr = vlan_eth_hdr(skb); |
c6c8fea2 | 218 | |
9d1601ef ML |
219 | /* drop batman-in-batman packets to prevent loops */ |
220 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { | |
53cf037b | 221 | network_offset += VLAN_HLEN; |
c6c8fea2 | 222 | break; |
53cf037b | 223 | } |
c6c8fea2 SE |
224 | |
225 | /* fall through */ | |
af5d4f77 | 226 | case ETH_P_BATMAN: |
c6c8fea2 | 227 | goto dropped; |
a7f6ee94 | 228 | } |
c6c8fea2 | 229 | |
53cf037b LL |
230 | skb_set_network_header(skb, network_offset); |
231 | ||
08adf151 | 232 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
233 | goto dropped; |
234 | ||
9d2c9488 | 235 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 236 | ethhdr = eth_hdr(skb); |
9d2c9488 | 237 | |
a73105b8 | 238 | /* Register the client MAC in the transtable */ |
a19d3d85 ML |
239 | if (!is_multicast_ether_addr(ethhdr->h_source)) { |
240 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, | |
9464d071 AQ |
241 | vid, skb->skb_iif, |
242 | skb->mark); | |
a19d3d85 ML |
243 | if (!client_added) |
244 | goto dropped; | |
245 | } | |
c6c8fea2 | 246 | |
b1a8c04b SW |
247 | /* don't accept stp packets. STP does not help in meshes. |
248 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
249 | * |
250 | * The same goes for ECTP sent at least by some Cisco Switches, | |
251 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 252 | */ |
1eda58bf | 253 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
254 | goto dropped; |
255 | ||
4934ab95 SW |
256 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
257 | goto dropped; | |
258 | ||
3a24a63e | 259 | gw_mode = atomic_read(&bat_priv->gw.mode); |
be7af5cf | 260 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
261 | /* if gw mode is off, broadcast every packet */ |
262 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
263 | do_bcast = true; | |
264 | goto send; | |
be7af5cf | 265 | } |
9d2c9488 | 266 | |
6c413b1c AQ |
267 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
268 | chaddr); | |
269 | /* skb->data may have been modified by | |
270 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 271 | */ |
927c2ed7 | 272 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
273 | /* if gw_mode is on, broadcast any non-DHCP message. |
274 | * All the DHCP packets are going to be sent as unicast | |
275 | */ | |
276 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
277 | do_bcast = true; | |
278 | goto send; | |
279 | } | |
280 | ||
281 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
282 | dst_hint = chaddr; | |
283 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
284 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
285 | /* gateways should not forward any DHCP message if | |
286 | * directed to a DHCP server | |
287 | */ | |
288 | goto dropped; | |
c6c8fea2 | 289 | |
6c413b1c | 290 | send: |
1d8ab8d3 LL |
291 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
292 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
293 | &mcast_single_orig); | |
294 | if (forw_mode == BATADV_FORW_NONE) | |
295 | goto dropped; | |
296 | ||
297 | if (forw_mode == BATADV_FORW_SINGLE) | |
298 | do_bcast = false; | |
299 | } | |
300 | } | |
301 | ||
c54f38c9 SW |
302 | batadv_skb_set_priority(skb, 0); |
303 | ||
c6c8fea2 SE |
304 | /* ethernet packet should be broadcasted */ |
305 | if (do_bcast) { | |
e5d89254 | 306 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 307 | if (!primary_if) |
c6c8fea2 SE |
308 | goto dropped; |
309 | ||
c384ea3e AQ |
310 | /* in case of ARP request, we do not immediately broadcasti the |
311 | * packet, instead we first wait for DAT to try to retrieve the | |
312 | * correct ARP entry | |
313 | */ | |
314 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
315 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
316 | ||
04b482a2 | 317 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
318 | goto dropped; |
319 | ||
96412690 | 320 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
321 | bcast_packet->version = BATADV_COMPAT_VERSION; |
322 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
323 | |
324 | /* batman packet type: broadcast */ | |
a40d9b07 | 325 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 326 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
327 | |
328 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
329 | * this mac is known throughout the mesh |
330 | */ | |
8fdd0153 AQ |
331 | ether_addr_copy(bcast_packet->orig, |
332 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
333 | |
334 | /* set broadcast sequence number */ | |
bbb1f90e SE |
335 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
336 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 337 | |
c384ea3e | 338 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); |
c6c8fea2 SE |
339 | |
340 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
341 | * the original skb. |
342 | */ | |
c6c8fea2 SE |
343 | kfree_skb(skb); |
344 | ||
345 | /* unicast packet */ | |
346 | } else { | |
6c413b1c AQ |
347 | /* DHCP packets going to a server will use the GW feature */ |
348 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 349 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
350 | if (ret) |
351 | goto dropped; | |
e300d314 | 352 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
353 | } else if (mcast_single_orig) { |
354 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
355 | BATADV_UNICAST, 0, | |
356 | mcast_single_orig, vid); | |
6c413b1c AQ |
357 | } else { |
358 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
359 | skb)) | |
360 | goto dropped; | |
e300d314 | 361 | |
6c413b1c AQ |
362 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
363 | ||
364 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
365 | vid); | |
366 | } | |
e300d314 | 367 | if (ret == NET_XMIT_DROP) |
c6c8fea2 SE |
368 | goto dropped_freed; |
369 | } | |
370 | ||
1c9b0550 ML |
371 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
372 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
373 | goto end; |
374 | ||
375 | dropped: | |
376 | kfree_skb(skb); | |
377 | dropped_freed: | |
1c9b0550 | 378 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 379 | end: |
32ae9b22 | 380 | if (primary_if) |
82047ad7 | 381 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
382 | return NETDEV_TX_OK; |
383 | } | |
384 | ||
f298cb94 SE |
385 | /** |
386 | * batadv_interface_rx - receive ethernet frame on local batman-adv interface | |
387 | * @soft_iface: local interface which will receive the ethernet frame | |
388 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
389 | * @hdr_size: size of already parsed batman-adv header |
390 | * @orig_node: originator from which the batman-adv packet was sent | |
391 | * | |
392 | * Sends a ethernet frame to the receive path of the local @soft_iface. | |
393 | * skb->data has still point to the batman-adv header with the size @hdr_size. | |
394 | * The caller has to have parsed this header already and made sure that at least | |
395 | * @hdr_size bytes are still available for pull in @skb. | |
396 | * | |
397 | * The packet may still get dropped. This can happen when the encapsulated | |
398 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
399 | * unicast packets will be dropped directly when it was sent between two | |
400 | * isolated clients. | |
401 | */ | |
04b482a2 | 402 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
403 | struct sk_buff *skb, int hdr_size, |
404 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 405 | { |
a40d9b07 | 406 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 407 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
408 | struct vlan_ethhdr *vhdr; |
409 | struct ethhdr *ethhdr; | |
410 | unsigned short vid; | |
2d3f6ccc SW |
411 | bool is_bcast; |
412 | ||
a40d9b07 SW |
413 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
414 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 | 415 | |
c6c8fea2 SE |
416 | skb_pull_rcsum(skb, hdr_size); |
417 | skb_reset_mac_header(skb); | |
418 | ||
55883fd1 AQ |
419 | /* clean the netfilter state now that the batman-adv header has been |
420 | * removed | |
421 | */ | |
422 | nf_reset(skb); | |
423 | ||
c7829666 SE |
424 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
425 | goto dropped; | |
426 | ||
2b1e2cb3 | 427 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 428 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
429 | |
430 | switch (ntohs(ethhdr->h_proto)) { | |
431 | case ETH_P_8021Q: | |
c7829666 SE |
432 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
433 | goto dropped; | |
434 | ||
c6c8fea2 | 435 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 436 | |
9d1601ef ML |
437 | /* drop batman-in-batman packets to prevent loops */ |
438 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
439 | break; |
440 | ||
441 | /* fall through */ | |
af5d4f77 | 442 | case ETH_P_BATMAN: |
c6c8fea2 SE |
443 | goto dropped; |
444 | } | |
445 | ||
c6c8fea2 | 446 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 SE |
447 | skb->protocol = eth_type_trans(skb, soft_iface); |
448 | ||
25985edc | 449 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 450 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
451 | * -- Dec 21st 2009, Simon Wunderlich |
452 | */ | |
c6c8fea2 | 453 | |
9cfc7bd6 | 454 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 455 | |
1c9b0550 ML |
456 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
457 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
458 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
459 | |
460 | soft_iface->last_rx = jiffies; | |
461 | ||
74490f96 AQ |
462 | /* Let the bridge loop avoidance check the packet. If will |
463 | * not handle it, we can safely push it up. | |
464 | */ | |
465 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
466 | goto out; | |
467 | ||
37135173 AQ |
468 | if (orig_node) |
469 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 470 | ethhdr->h_source, vid); |
37135173 | 471 | |
42cb0bef AQ |
472 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
473 | /* set the mark on broadcast packets if AP isolation is ON and | |
474 | * the packet is coming from an "isolated" client | |
475 | */ | |
476 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
477 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
478 | vid)) { | |
479 | /* save bits in skb->mark not covered by the mask and | |
480 | * apply the mark on the rest | |
481 | */ | |
482 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
483 | skb->mark |= bat_priv->isolation_mark; | |
484 | } | |
485 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
486 | ethhdr->h_dest, vid)) { | |
59b699cd | 487 | goto dropped; |
42cb0bef | 488 | } |
59b699cd | 489 | |
c6c8fea2 | 490 | netif_rx(skb); |
ba85fac2 | 491 | goto out; |
c6c8fea2 SE |
492 | |
493 | dropped: | |
494 | kfree_skb(skb); | |
495 | out: | |
496 | return; | |
497 | } | |
498 | ||
6be4d30c SE |
499 | /** |
500 | * batadv_softif_vlan_release - release vlan from lists and queue for free after | |
501 | * rcu grace period | |
502 | * @ref: kref pointer of the vlan object | |
503 | */ | |
504 | static void batadv_softif_vlan_release(struct kref *ref) | |
505 | { | |
506 | struct batadv_softif_vlan *vlan; | |
507 | ||
508 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
509 | ||
510 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
511 | hlist_del_rcu(&vlan->list); | |
512 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
513 | ||
514 | kfree_rcu(vlan, rcu); | |
515 | } | |
516 | ||
5d2c05b2 | 517 | /** |
9c3bf081 | 518 | * batadv_softif_vlan_put - decrease the vlan object refcounter and |
6be4d30c | 519 | * possibly release it |
e51f0397 | 520 | * @vlan: the vlan object to release |
5d2c05b2 | 521 | */ |
9c3bf081 | 522 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 523 | { |
354136bc ML |
524 | if (!vlan) |
525 | return; | |
526 | ||
6be4d30c | 527 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
528 | } |
529 | ||
530 | /** | |
531 | * batadv_softif_vlan_get - get the vlan object for a specific vid | |
532 | * @bat_priv: the bat priv with all the soft interface information | |
533 | * @vid: the identifier of the vlan object to retrieve | |
534 | * | |
62fe710f | 535 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
536 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
537 | */ | |
90f4435d AQ |
538 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
539 | unsigned short vid) | |
5d2c05b2 AQ |
540 | { |
541 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
542 | ||
543 | rcu_read_lock(); | |
544 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
545 | if (vlan_tmp->vid != vid) | |
546 | continue; | |
547 | ||
6be4d30c | 548 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
549 | continue; |
550 | ||
551 | vlan = vlan_tmp; | |
552 | break; | |
553 | } | |
554 | rcu_read_unlock(); | |
555 | ||
556 | return vlan; | |
557 | } | |
558 | ||
559 | /** | |
6d030de8 | 560 | * batadv_softif_create_vlan - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
561 | * @bat_priv: the bat priv with all the soft interface information |
562 | * @vid: the VLAN identifier | |
563 | * | |
62fe710f | 564 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
565 | */ |
566 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
567 | { | |
568 | struct batadv_softif_vlan *vlan; | |
90f4435d | 569 | int err; |
5d2c05b2 AQ |
570 | |
571 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
572 | if (vlan) { | |
9c3bf081 | 573 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
574 | return -EEXIST; |
575 | } | |
576 | ||
577 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
578 | if (!vlan) | |
579 | return -ENOMEM; | |
580 | ||
35df3b29 | 581 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 582 | vlan->vid = vid; |
6be4d30c | 583 | kref_init(&vlan->refcount); |
5d2c05b2 | 584 | |
b8cbd81d AQ |
585 | atomic_set(&vlan->ap_isolation, 0); |
586 | ||
90f4435d AQ |
587 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
588 | if (err) { | |
589 | kfree(vlan); | |
590 | return err; | |
591 | } | |
592 | ||
35df3b29 AQ |
593 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
594 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); | |
595 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
596 | ||
5d2c05b2 AQ |
597 | /* add a new TT local entry. This one will be marked with the NOPURGE |
598 | * flag | |
599 | */ | |
600 | batadv_tt_local_add(bat_priv->soft_iface, | |
601 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 602 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 603 | |
5d2c05b2 AQ |
604 | return 0; |
605 | } | |
606 | ||
607 | /** | |
608 | * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object | |
609 | * @bat_priv: the bat priv with all the soft interface information | |
610 | * @vlan: the object to remove | |
611 | */ | |
612 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
613 | struct batadv_softif_vlan *vlan) | |
614 | { | |
5d2c05b2 AQ |
615 | /* explicitly remove the associated TT local entry because it is marked |
616 | * with the NOPURGE flag | |
617 | */ | |
618 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
619 | vlan->vid, "vlan interface destroyed", false); | |
620 | ||
35df3b29 | 621 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 622 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
623 | } |
624 | ||
625 | /** | |
626 | * batadv_interface_add_vid - ndo_add_vid API implementation | |
627 | * @dev: the netdev of the mesh interface | |
7afcbbef | 628 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
629 | * @vid: identifier of the new vlan |
630 | * | |
631 | * Set up all the internal structures for handling the new vlan on top of the | |
632 | * mesh interface | |
633 | * | |
62fe710f | 634 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
635 | */ |
636 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
637 | unsigned short vid) | |
638 | { | |
639 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
640 | struct batadv_softif_vlan *vlan; |
641 | int ret; | |
5d2c05b2 AQ |
642 | |
643 | /* only 802.1Q vlans are supported. | |
644 | * batman-adv does not know how to handle other types | |
645 | */ | |
646 | if (proto != htons(ETH_P_8021Q)) | |
647 | return -EINVAL; | |
648 | ||
649 | vid |= BATADV_VLAN_HAS_TAG; | |
650 | ||
35df3b29 AQ |
651 | /* if a new vlan is getting created and it already exists, it means that |
652 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
653 | * refcount in order to revive the object. | |
654 | * | |
655 | * if it does not exist then create it. | |
656 | */ | |
657 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
658 | if (!vlan) | |
659 | return batadv_softif_create_vlan(bat_priv, vid); | |
660 | ||
661 | /* recreate the sysfs object if it was already destroyed (and it should | |
662 | * be since we received a kill_vid() for this vlan | |
663 | */ | |
664 | if (!vlan->kobj) { | |
665 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
666 | if (ret) { | |
9c3bf081 | 667 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
668 | return ret; |
669 | } | |
670 | } | |
671 | ||
672 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
673 | * flag. This must be added again, even if the vlan object already | |
674 | * exists, because the entry was deleted by kill_vid() | |
675 | */ | |
676 | batadv_tt_local_add(bat_priv->soft_iface, | |
677 | bat_priv->soft_iface->dev_addr, vid, | |
678 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
679 | ||
680 | return 0; | |
5d2c05b2 AQ |
681 | } |
682 | ||
683 | /** | |
684 | * batadv_interface_kill_vid - ndo_kill_vid API implementation | |
685 | * @dev: the netdev of the mesh interface | |
7afcbbef | 686 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
687 | * @vid: identifier of the deleted vlan |
688 | * | |
689 | * Destroy all the internal structures used to handle the vlan identified by vid | |
690 | * on top of the mesh interface | |
691 | * | |
62fe710f | 692 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
693 | * or -ENOENT if the specified vlan id wasn't registered. |
694 | */ | |
695 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
696 | unsigned short vid) | |
697 | { | |
698 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
699 | struct batadv_softif_vlan *vlan; | |
700 | ||
701 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
702 | * handle other types | |
703 | */ | |
704 | if (proto != htons(ETH_P_8021Q)) | |
705 | return -EINVAL; | |
706 | ||
707 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
708 | if (!vlan) | |
709 | return -ENOENT; | |
710 | ||
711 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
712 | ||
713 | /* finally free the vlan object */ | |
9c3bf081 | 714 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
715 | |
716 | return 0; | |
717 | } | |
718 | ||
36c1d153 SE |
719 | /* batman-adv network devices have devices nesting below it and are a special |
720 | * "super class" of normal network devices; split their locks off into a | |
721 | * separate class since they always nest. | |
722 | */ | |
723 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
724 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
725 | ||
726 | /** | |
727 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
728 | * @dev: device which owns the tx queue | |
729 | * @txq: tx queue to modify | |
730 | * @_unused: always NULL | |
731 | */ | |
732 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
733 | struct netdev_queue *txq, | |
734 | void *_unused) | |
735 | { | |
736 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
737 | } | |
738 | ||
739 | /** | |
740 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
741 | * @dev: network device to modify | |
742 | */ | |
743 | static void batadv_set_lockdep_class(struct net_device *dev) | |
744 | { | |
745 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
746 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
747 | } | |
748 | ||
5bc44dc8 SW |
749 | /** |
750 | * batadv_softif_destroy_finish - cleans up the remains of a softif | |
751 | * @work: work queue item | |
752 | * | |
753 | * Free the parts of the soft interface which can not be removed under | |
754 | * rtnl lock (to prevent deadlock situations). | |
755 | */ | |
756 | static void batadv_softif_destroy_finish(struct work_struct *work) | |
757 | { | |
5d2c05b2 | 758 | struct batadv_softif_vlan *vlan; |
5bc44dc8 SW |
759 | struct batadv_priv *bat_priv; |
760 | struct net_device *soft_iface; | |
761 | ||
762 | bat_priv = container_of(work, struct batadv_priv, | |
763 | cleanup_work); | |
764 | soft_iface = bat_priv->soft_iface; | |
765 | ||
5d2c05b2 AQ |
766 | /* destroy the "untagged" VLAN */ |
767 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
768 | if (vlan) { | |
769 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
9c3bf081 | 770 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
771 | } |
772 | ||
5bc44dc8 | 773 | batadv_sysfs_del_meshif(soft_iface); |
af63fde5 | 774 | unregister_netdev(soft_iface); |
5bc44dc8 SW |
775 | } |
776 | ||
37130293 SE |
777 | /** |
778 | * batadv_softif_init_late - late stage initialization of soft interface | |
779 | * @dev: registered network device to modify | |
780 | * | |
62fe710f | 781 | * Return: error code on failures |
37130293 SE |
782 | */ |
783 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 784 | { |
56303d34 | 785 | struct batadv_priv *bat_priv; |
6b5e971a | 786 | u32 random_seqno; |
c6c8fea2 | 787 | int ret; |
6b5e971a | 788 | size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; |
c6c8fea2 | 789 | |
37130293 | 790 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 791 | |
37130293 SE |
792 | bat_priv = netdev_priv(dev); |
793 | bat_priv->soft_iface = dev; | |
5bc44dc8 | 794 | INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); |
1c9b0550 ML |
795 | |
796 | /* batadv_interface_stats() needs to be available as soon as | |
797 | * register_netdevice() has been called | |
798 | */ | |
6b5e971a | 799 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 800 | if (!bat_priv->bat_counters) |
37130293 | 801 | return -ENOMEM; |
c6c8fea2 | 802 | |
c6c8fea2 SE |
803 | atomic_set(&bat_priv->aggregated_ogms, 1); |
804 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 805 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 806 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 807 | #endif |
33af49ad AQ |
808 | #ifdef CONFIG_BATMAN_ADV_DAT |
809 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
810 | #endif |
811 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
72f7b2de LL |
812 | bat_priv->mcast.querier_ipv4.exists = false; |
813 | bat_priv->mcast.querier_ipv4.shadowing = false; | |
814 | bat_priv->mcast.querier_ipv6.exists = false; | |
815 | bat_priv->mcast.querier_ipv6.shadowing = false; | |
60432d75 | 816 | bat_priv->mcast.flags = BATADV_NO_FLAGS; |
1d8ab8d3 | 817 | atomic_set(&bat_priv->multicast_mode, 1); |
60432d75 | 818 | atomic_set(&bat_priv->mcast.num_disabled, 0); |
ab49886e | 819 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
820 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
821 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 822 | #endif |
3a24a63e AQ |
823 | atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); |
824 | atomic_set(&bat_priv->gw.sel_class, 20); | |
414254e3 ML |
825 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
826 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 827 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 828 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 829 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 830 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 831 | #endif |
c6c8fea2 | 832 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 833 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
834 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
835 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 836 | |
39c75a51 | 837 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 838 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
839 | atomic_set(&bat_priv->tt.vn, 0); |
840 | atomic_set(&bat_priv->tt.local_changes, 0); | |
841 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
842 | #ifdef CONFIG_BATMAN_ADV_BLA | |
843 | atomic_set(&bat_priv->bla.num_requests, 0); | |
844 | #endif | |
845 | bat_priv->tt.last_changeset = NULL; | |
846 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
847 | bat_priv->isolation_mark = 0; |
848 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 849 | |
ee75ed88 MH |
850 | /* randomize initial seqno to avoid collision */ |
851 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
852 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
853 | ||
c6c8fea2 SE |
854 | bat_priv->primary_if = NULL; |
855 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 856 | |
d353d8d4 MH |
857 | batadv_nc_init_bat_priv(bat_priv); |
858 | ||
37130293 | 859 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 860 | if (ret < 0) |
37130293 | 861 | goto free_bat_counters; |
c6c8fea2 | 862 | |
37130293 | 863 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 864 | if (ret < 0) |
37130293 | 865 | goto free_bat_counters; |
c6c8fea2 | 866 | |
37130293 | 867 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
868 | if (ret < 0) |
869 | goto unreg_debugfs; | |
870 | ||
37130293 | 871 | return 0; |
c6c8fea2 SE |
872 | |
873 | unreg_debugfs: | |
37130293 | 874 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
875 | free_bat_counters: |
876 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 877 | bat_priv->bat_counters = NULL; |
37130293 SE |
878 | |
879 | return ret; | |
880 | } | |
881 | ||
3dbd550b SE |
882 | /** |
883 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
884 | * @dev: batadv_soft_interface used as master interface | |
885 | * @slave_dev: net_device which should become the slave interface | |
886 | * | |
62fe710f | 887 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
888 | */ |
889 | static int batadv_softif_slave_add(struct net_device *dev, | |
890 | struct net_device *slave_dev) | |
891 | { | |
892 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 893 | struct net *net = dev_net(dev); |
3dbd550b SE |
894 | int ret = -EINVAL; |
895 | ||
896 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 897 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
898 | goto out; |
899 | ||
2cd45a06 | 900 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
901 | |
902 | out: | |
903 | if (hard_iface) | |
82047ad7 | 904 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
905 | return ret; |
906 | } | |
907 | ||
908 | /** | |
909 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
910 | * @dev: batadv_soft_interface used as master interface | |
911 | * @slave_dev: net_device which should be removed from the master interface | |
912 | * | |
62fe710f | 913 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
914 | */ |
915 | static int batadv_softif_slave_del(struct net_device *dev, | |
916 | struct net_device *slave_dev) | |
917 | { | |
918 | struct batadv_hard_iface *hard_iface; | |
919 | int ret = -EINVAL; | |
920 | ||
921 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
922 | ||
923 | if (!hard_iface || hard_iface->soft_iface != dev) | |
924 | goto out; | |
925 | ||
926 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
927 | ret = 0; | |
928 | ||
929 | out: | |
930 | if (hard_iface) | |
82047ad7 | 931 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
932 | return ret; |
933 | } | |
934 | ||
37130293 SE |
935 | static const struct net_device_ops batadv_netdev_ops = { |
936 | .ndo_init = batadv_softif_init_late, | |
937 | .ndo_open = batadv_interface_open, | |
938 | .ndo_stop = batadv_interface_release, | |
939 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
940 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
941 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
942 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
943 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 944 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 945 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
946 | .ndo_validate_addr = eth_validate_addr, |
947 | .ndo_add_slave = batadv_softif_slave_add, | |
948 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
949 | }; |
950 | ||
b3246020 SE |
951 | /** |
952 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
953 | * @dev: Device to cleanup and remove | |
954 | */ | |
955 | static void batadv_softif_free(struct net_device *dev) | |
956 | { | |
957 | batadv_debugfs_del_meshif(dev); | |
958 | batadv_mesh_free(dev); | |
0c501345 AQ |
959 | |
960 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
961 | * their tasks. Wait for them all to be finished before freeing the | |
962 | * netdev and its private data (bat_priv) | |
963 | */ | |
964 | rcu_barrier(); | |
965 | ||
b3246020 SE |
966 | free_netdev(dev); |
967 | } | |
968 | ||
37130293 SE |
969 | /** |
970 | * batadv_softif_init_early - early stage initialization of soft interface | |
971 | * @dev: registered network device to modify | |
972 | */ | |
973 | static void batadv_softif_init_early(struct net_device *dev) | |
974 | { | |
975 | struct batadv_priv *priv = netdev_priv(dev); | |
976 | ||
977 | ether_setup(dev); | |
978 | ||
979 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 980 | dev->destructor = batadv_softif_free; |
0d21cdaa | 981 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
cdf73703 | 982 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
983 | |
984 | /* can't call min_mtu, because the needed variables | |
985 | * have not been initialized yet | |
986 | */ | |
987 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
988 | |
989 | /* generate random address */ | |
990 | eth_hw_addr_random(dev); | |
991 | ||
7ad24ea4 | 992 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
993 | |
994 | memset(priv, 0, sizeof(*priv)); | |
995 | } | |
996 | ||
2cd45a06 | 997 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
998 | { |
999 | struct net_device *soft_iface; | |
1000 | int ret; | |
1001 | ||
1002 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 1003 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
1004 | if (!soft_iface) |
1005 | return NULL; | |
1006 | ||
2cd45a06 AL |
1007 | dev_net_set(soft_iface, net); |
1008 | ||
a4ac28c0 SE |
1009 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1010 | ||
37130293 SE |
1011 | ret = register_netdevice(soft_iface); |
1012 | if (ret < 0) { | |
1013 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1014 | name, ret); | |
1015 | free_netdev(soft_iface); | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
1019 | return soft_iface; | |
c6c8fea2 SE |
1020 | } |
1021 | ||
e07932ae ML |
1022 | /** |
1023 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
1024 | * @soft_iface: the to-be-removed batman-adv interface | |
1025 | */ | |
1026 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1027 | { |
5bc44dc8 SW |
1028 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
1029 | ||
5bc44dc8 | 1030 | queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); |
c6c8fea2 SE |
1031 | } |
1032 | ||
a4ac28c0 SE |
1033 | /** |
1034 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
1035 | * @soft_iface: the to-be-removed batman-adv interface | |
1036 | * @head: list pointer | |
1037 | */ | |
1038 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1039 | struct list_head *head) | |
1040 | { | |
1041 | struct batadv_hard_iface *hard_iface; | |
1042 | ||
1043 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1044 | if (hard_iface->soft_iface == soft_iface) | |
1045 | batadv_hardif_disable_interface(hard_iface, | |
1046 | BATADV_IF_CLEANUP_KEEP); | |
1047 | } | |
1048 | ||
1049 | batadv_sysfs_del_meshif(soft_iface); | |
1050 | unregister_netdevice_queue(soft_iface, head); | |
1051 | } | |
1052 | ||
4b426b10 | 1053 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1054 | { |
0294ca0d | 1055 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1056 | return true; |
e44d8fe2 | 1057 | |
4b426b10 | 1058 | return false; |
e44d8fe2 SE |
1059 | } |
1060 | ||
a4ac28c0 SE |
1061 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1062 | .kind = "batadv", | |
1063 | .priv_size = sizeof(struct batadv_priv), | |
1064 | .setup = batadv_softif_init_early, | |
1065 | .dellink = batadv_softif_destroy_netlink, | |
1066 | }; | |
1067 | ||
c6c8fea2 | 1068 | /* ethtool */ |
0294ca0d | 1069 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
1070 | { |
1071 | cmd->supported = 0; | |
1072 | cmd->advertising = 0; | |
70739497 | 1073 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
1074 | cmd->duplex = DUPLEX_FULL; |
1075 | cmd->port = PORT_TP; | |
1076 | cmd->phy_address = 0; | |
1077 | cmd->transceiver = XCVR_INTERNAL; | |
1078 | cmd->autoneg = AUTONEG_DISABLE; | |
1079 | cmd->maxtxpkt = 0; | |
1080 | cmd->maxrxpkt = 0; | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
0294ca0d SE |
1085 | static void batadv_get_drvinfo(struct net_device *dev, |
1086 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 1087 | { |
7826d43f JP |
1088 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
1089 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
1090 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
1091 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
1092 | } |
1093 | ||
0294ca0d | 1094 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
1095 | { |
1096 | return -EOPNOTSUPP; | |
1097 | } | |
1098 | ||
0294ca0d | 1099 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
1100 | { |
1101 | } | |
1102 | ||
0294ca0d | 1103 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
1104 | { |
1105 | return 1; | |
1106 | } | |
f8214865 MH |
1107 | |
1108 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
1109 | * Declare each description string in struct.name[] to get fixed sized buffer | |
1110 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
1111 | */ | |
1112 | static const struct { | |
1113 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 1114 | } batadv_counters_strings[] = { |
1c9b0550 ML |
1115 | { "tx" }, |
1116 | { "tx_bytes" }, | |
1117 | { "tx_dropped" }, | |
1118 | { "rx" }, | |
1119 | { "rx_bytes" }, | |
f8214865 MH |
1120 | { "forward" }, |
1121 | { "forward_bytes" }, | |
1122 | { "mgmt_tx" }, | |
1123 | { "mgmt_tx_bytes" }, | |
1124 | { "mgmt_rx" }, | |
1125 | { "mgmt_rx_bytes" }, | |
ee75ed88 MH |
1126 | { "frag_tx" }, |
1127 | { "frag_tx_bytes" }, | |
610bfc6b MH |
1128 | { "frag_rx" }, |
1129 | { "frag_rx_bytes" }, | |
1130 | { "frag_fwd" }, | |
1131 | { "frag_fwd_bytes" }, | |
f8214865 MH |
1132 | { "tt_request_tx" }, |
1133 | { "tt_request_rx" }, | |
1134 | { "tt_response_tx" }, | |
1135 | { "tt_response_rx" }, | |
1136 | { "tt_roam_adv_tx" }, | |
1137 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
1138 | #ifdef CONFIG_BATMAN_ADV_DAT |
1139 | { "dat_get_tx" }, | |
1140 | { "dat_get_rx" }, | |
1141 | { "dat_put_tx" }, | |
1142 | { "dat_put_rx" }, | |
1143 | { "dat_cached_reply_tx" }, | |
1144 | #endif | |
3c12de9a MH |
1145 | #ifdef CONFIG_BATMAN_ADV_NC |
1146 | { "nc_code" }, | |
1147 | { "nc_code_bytes" }, | |
1148 | { "nc_recode" }, | |
1149 | { "nc_recode_bytes" }, | |
612d2b4f | 1150 | { "nc_buffer" }, |
2df5278b MH |
1151 | { "nc_decode" }, |
1152 | { "nc_decode_bytes" }, | |
1153 | { "nc_decode_failed" }, | |
1154 | { "nc_sniffed" }, | |
3c12de9a | 1155 | #endif |
f8214865 MH |
1156 | }; |
1157 | ||
6b5e971a | 1158 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
f8214865 MH |
1159 | { |
1160 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
1161 | memcpy(data, batadv_counters_strings, |
1162 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
1163 | } |
1164 | ||
1165 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
6b5e971a | 1166 | struct ethtool_stats *stats, u64 *data) |
f8214865 | 1167 | { |
56303d34 | 1168 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
1169 | int i; |
1170 | ||
d69909d2 | 1171 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
1172 | data[i] = batadv_sum_counter(bat_priv, i); |
1173 | } | |
1174 | ||
1175 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1176 | { | |
1177 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 1178 | return BATADV_CNT_NUM; |
f8214865 MH |
1179 | |
1180 | return -EOPNOTSUPP; | |
1181 | } |