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9f6446c7 | 1 | /* Copyright (C) 2007-2015 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> | |
33 | #include <linux/list.h> | |
34 | #include <linux/lockdep.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/percpu.h> | |
37 | #include <linux/printk.h> | |
38 | #include <linux/random.h> | |
39 | #include <linux/rculist.h> | |
40 | #include <linux/rcupdate.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/socket.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/stddef.h> | |
46 | #include <linux/string.h> | |
47 | #include <linux/types.h> | |
48 | #include <linux/workqueue.h> | |
49 | ||
23721387 | 50 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
51 | #include "debugfs.h" |
52 | #include "distributed-arp-table.h" | |
53 | #include "gateway_client.h" | |
54 | #include "gateway_common.h" | |
55 | #include "hard-interface.h" | |
56 | #include "multicast.h" | |
d353d8d4 | 57 | #include "network-coding.h" |
1e2c2a4f SE |
58 | #include "packet.h" |
59 | #include "send.h" | |
60 | #include "sysfs.h" | |
61 | #include "translation-table.h" | |
c6c8fea2 | 62 | |
0294ca0d SE |
63 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
64 | static void batadv_get_drvinfo(struct net_device *dev, | |
65 | struct ethtool_drvinfo *info); | |
66 | static u32 batadv_get_msglevel(struct net_device *dev); | |
67 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
68 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
69 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
70 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
71 | struct ethtool_stats *stats, u64 *data); | |
72 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 73 | |
0294ca0d SE |
74 | static const struct ethtool_ops batadv_ethtool_ops = { |
75 | .get_settings = batadv_get_settings, | |
76 | .get_drvinfo = batadv_get_drvinfo, | |
77 | .get_msglevel = batadv_get_msglevel, | |
78 | .set_msglevel = batadv_set_msglevel, | |
79 | .get_link = batadv_get_link, | |
f8214865 MH |
80 | .get_strings = batadv_get_strings, |
81 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
82 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
83 | }; |
84 | ||
04b482a2 | 85 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
86 | { |
87 | int result; | |
88 | ||
9cfc7bd6 | 89 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
90 | * data using skb_header_release in our skbs to allow skb_cow_header to |
91 | * work optimally. This means that those skbs are not allowed to read | |
92 | * or write any data which is before the current position of skb->data | |
93 | * after that call and thus allow other skbs with the same data buffer | |
94 | * to write freely in that area. | |
95 | */ | |
96 | result = skb_cow_head(skb, len); | |
97 | if (result < 0) | |
98 | return result; | |
99 | ||
100 | skb_push(skb, len); | |
101 | return 0; | |
102 | } | |
103 | ||
0294ca0d | 104 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
105 | { |
106 | netif_start_queue(dev); | |
107 | return 0; | |
108 | } | |
109 | ||
0294ca0d | 110 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
111 | { |
112 | netif_stop_queue(dev); | |
113 | return 0; | |
114 | } | |
115 | ||
0294ca0d | 116 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 117 | { |
56303d34 | 118 | struct batadv_priv *bat_priv = netdev_priv(dev); |
1c9b0550 ML |
119 | struct net_device_stats *stats = &bat_priv->stats; |
120 | ||
121 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
122 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
123 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
124 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
125 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
126 | return stats; | |
c6c8fea2 SE |
127 | } |
128 | ||
0294ca0d | 129 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 130 | { |
56303d34 | 131 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 132 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 133 | struct sockaddr *addr = p; |
40a3eb33 | 134 | uint8_t old_addr[ETH_ALEN]; |
c6c8fea2 SE |
135 | |
136 | if (!is_valid_ether_addr(addr->sa_data)) | |
137 | return -EADDRNOTAVAIL; | |
138 | ||
8fdd0153 AQ |
139 | ether_addr_copy(old_addr, dev->dev_addr); |
140 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 141 | |
015758d0 | 142 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
143 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
144 | return 0; | |
145 | ||
146 | rcu_read_lock(); | |
147 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
148 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 149 | "mac address changed", false); |
94d1dd87 | 150 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 151 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 152 | } |
94d1dd87 | 153 | rcu_read_unlock(); |
c6c8fea2 | 154 | |
c6c8fea2 SE |
155 | return 0; |
156 | } | |
157 | ||
0294ca0d | 158 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
159 | { |
160 | /* check ranges */ | |
9563877e | 161 | if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) |
c6c8fea2 SE |
162 | return -EINVAL; |
163 | ||
164 | dev->mtu = new_mtu; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
a4deee1a LL |
169 | /** |
170 | * batadv_interface_set_rx_mode - set the rx mode of a device | |
171 | * @dev: registered network device to modify | |
172 | * | |
173 | * We do not actually need to set any rx filters for the virtual batman | |
174 | * soft interface. However a dummy handler enables a user to set static | |
175 | * multicast listeners for instance. | |
176 | */ | |
177 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
178 | { | |
179 | } | |
180 | ||
0294ca0d SE |
181 | static int batadv_interface_tx(struct sk_buff *skb, |
182 | struct net_device *soft_iface) | |
c6c8fea2 | 183 | { |
c018ad3d | 184 | struct ethhdr *ethhdr; |
56303d34 SE |
185 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
186 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 187 | struct batadv_bcast_packet *bcast_packet; |
293e9338 | 188 | __be16 ethertype = htons(ETH_P_BATMAN); |
4934ab95 SW |
189 | static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
190 | 0x00, 0x00}; | |
191 | static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
192 | 0x00, 0x00}; | |
6c413b1c AQ |
193 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
194 | uint8_t *dst_hint = NULL, chaddr[ETH_ALEN]; | |
c018ad3d | 195 | struct vlan_ethhdr *vhdr; |
be7af5cf | 196 | unsigned int header_len = 0; |
c6c8fea2 | 197 | int data_len = skb->len, ret; |
c018ad3d | 198 | unsigned long brd_delay = 1; |
a19d3d85 | 199 | bool do_bcast = false, client_added; |
c018ad3d | 200 | unsigned short vid; |
bbb1f90e | 201 | uint32_t seqno; |
6c413b1c | 202 | int gw_mode; |
1d8ab8d3 LL |
203 | enum batadv_forw_mode forw_mode; |
204 | struct batadv_orig_node *mcast_single_orig = NULL; | |
c6c8fea2 | 205 | |
39c75a51 | 206 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
207 | goto dropped; |
208 | ||
209 | soft_iface->trans_start = jiffies; | |
c018ad3d | 210 | vid = batadv_get_vid(skb, 0); |
927c2ed7 | 211 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
212 | |
213 | switch (ntohs(ethhdr->h_proto)) { | |
214 | case ETH_P_8021Q: | |
927c2ed7 | 215 | vhdr = vlan_eth_hdr(skb); |
c6c8fea2 | 216 | |
7e071c79 | 217 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
218 | break; |
219 | ||
220 | /* fall through */ | |
af5d4f77 | 221 | case ETH_P_BATMAN: |
c6c8fea2 | 222 | goto dropped; |
a7f6ee94 | 223 | } |
c6c8fea2 | 224 | |
08adf151 | 225 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
226 | goto dropped; |
227 | ||
9d2c9488 | 228 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 229 | ethhdr = eth_hdr(skb); |
9d2c9488 | 230 | |
a73105b8 | 231 | /* Register the client MAC in the transtable */ |
a19d3d85 ML |
232 | if (!is_multicast_ether_addr(ethhdr->h_source)) { |
233 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, | |
9464d071 AQ |
234 | vid, skb->skb_iif, |
235 | skb->mark); | |
a19d3d85 ML |
236 | if (!client_added) |
237 | goto dropped; | |
238 | } | |
c6c8fea2 | 239 | |
b1a8c04b SW |
240 | /* don't accept stp packets. STP does not help in meshes. |
241 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
242 | * |
243 | * The same goes for ECTP sent at least by some Cisco Switches, | |
244 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 245 | */ |
1eda58bf | 246 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
247 | goto dropped; |
248 | ||
4934ab95 SW |
249 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
250 | goto dropped; | |
251 | ||
6c413b1c | 252 | gw_mode = atomic_read(&bat_priv->gw_mode); |
be7af5cf | 253 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
254 | /* if gw mode is off, broadcast every packet */ |
255 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
256 | do_bcast = true; | |
257 | goto send; | |
be7af5cf | 258 | } |
9d2c9488 | 259 | |
6c413b1c AQ |
260 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
261 | chaddr); | |
262 | /* skb->data may have been modified by | |
263 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 264 | */ |
927c2ed7 | 265 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
266 | /* if gw_mode is on, broadcast any non-DHCP message. |
267 | * All the DHCP packets are going to be sent as unicast | |
268 | */ | |
269 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
270 | do_bcast = true; | |
271 | goto send; | |
272 | } | |
273 | ||
274 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
275 | dst_hint = chaddr; | |
276 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
277 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
278 | /* gateways should not forward any DHCP message if | |
279 | * directed to a DHCP server | |
280 | */ | |
281 | goto dropped; | |
c6c8fea2 | 282 | |
6c413b1c | 283 | send: |
1d8ab8d3 LL |
284 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
285 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
286 | &mcast_single_orig); | |
287 | if (forw_mode == BATADV_FORW_NONE) | |
288 | goto dropped; | |
289 | ||
290 | if (forw_mode == BATADV_FORW_SINGLE) | |
291 | do_bcast = false; | |
292 | } | |
293 | } | |
294 | ||
c54f38c9 SW |
295 | batadv_skb_set_priority(skb, 0); |
296 | ||
c6c8fea2 SE |
297 | /* ethernet packet should be broadcasted */ |
298 | if (do_bcast) { | |
e5d89254 | 299 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 300 | if (!primary_if) |
c6c8fea2 SE |
301 | goto dropped; |
302 | ||
c384ea3e AQ |
303 | /* in case of ARP request, we do not immediately broadcasti the |
304 | * packet, instead we first wait for DAT to try to retrieve the | |
305 | * correct ARP entry | |
306 | */ | |
307 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
308 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
309 | ||
04b482a2 | 310 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
311 | goto dropped; |
312 | ||
96412690 | 313 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
314 | bcast_packet->version = BATADV_COMPAT_VERSION; |
315 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
316 | |
317 | /* batman packet type: broadcast */ | |
a40d9b07 | 318 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 319 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
320 | |
321 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
322 | * this mac is known throughout the mesh |
323 | */ | |
8fdd0153 AQ |
324 | ether_addr_copy(bcast_packet->orig, |
325 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
326 | |
327 | /* set broadcast sequence number */ | |
bbb1f90e SE |
328 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
329 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 330 | |
c384ea3e | 331 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); |
c6c8fea2 SE |
332 | |
333 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
334 | * the original skb. |
335 | */ | |
c6c8fea2 SE |
336 | kfree_skb(skb); |
337 | ||
338 | /* unicast packet */ | |
339 | } else { | |
6c413b1c AQ |
340 | /* DHCP packets going to a server will use the GW feature */ |
341 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 342 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
343 | if (ret) |
344 | goto dropped; | |
e300d314 | 345 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
346 | } else if (mcast_single_orig) { |
347 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
348 | BATADV_UNICAST, 0, | |
349 | mcast_single_orig, vid); | |
6c413b1c AQ |
350 | } else { |
351 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
352 | skb)) | |
353 | goto dropped; | |
e300d314 | 354 | |
6c413b1c AQ |
355 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
356 | ||
357 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
358 | vid); | |
359 | } | |
e300d314 | 360 | if (ret == NET_XMIT_DROP) |
c6c8fea2 SE |
361 | goto dropped_freed; |
362 | } | |
363 | ||
1c9b0550 ML |
364 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
365 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
366 | goto end; |
367 | ||
368 | dropped: | |
369 | kfree_skb(skb); | |
370 | dropped_freed: | |
1c9b0550 | 371 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 372 | end: |
32ae9b22 | 373 | if (primary_if) |
e5d89254 | 374 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
375 | return NETDEV_TX_OK; |
376 | } | |
377 | ||
04b482a2 | 378 | void batadv_interface_rx(struct net_device *soft_iface, |
56303d34 | 379 | struct sk_buff *skb, struct batadv_hard_iface *recv_if, |
37135173 | 380 | int hdr_size, struct batadv_orig_node *orig_node) |
c6c8fea2 | 381 | { |
a40d9b07 | 382 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 383 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
293e9338 | 384 | __be16 ethertype = htons(ETH_P_BATMAN); |
c018ad3d AQ |
385 | struct vlan_ethhdr *vhdr; |
386 | struct ethhdr *ethhdr; | |
387 | unsigned short vid; | |
2d3f6ccc SW |
388 | bool is_bcast; |
389 | ||
a40d9b07 SW |
390 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
391 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 SE |
392 | |
393 | /* check if enough space is available for pulling, and pull */ | |
394 | if (!pskb_may_pull(skb, hdr_size)) | |
395 | goto dropped; | |
396 | ||
397 | skb_pull_rcsum(skb, hdr_size); | |
398 | skb_reset_mac_header(skb); | |
399 | ||
55883fd1 AQ |
400 | /* clean the netfilter state now that the batman-adv header has been |
401 | * removed | |
402 | */ | |
403 | nf_reset(skb); | |
404 | ||
2b1e2cb3 | 405 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 406 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
407 | |
408 | switch (ntohs(ethhdr->h_proto)) { | |
409 | case ETH_P_8021Q: | |
410 | vhdr = (struct vlan_ethhdr *)skb->data; | |
c6c8fea2 | 411 | |
7e071c79 | 412 | if (vhdr->h_vlan_encapsulated_proto != ethertype) |
c6c8fea2 SE |
413 | break; |
414 | ||
415 | /* fall through */ | |
af5d4f77 | 416 | case ETH_P_BATMAN: |
c6c8fea2 SE |
417 | goto dropped; |
418 | } | |
419 | ||
c6c8fea2 SE |
420 | /* skb->dev & skb->pkt_type are set here */ |
421 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) | |
422 | goto dropped; | |
423 | skb->protocol = eth_type_trans(skb, soft_iface); | |
424 | ||
25985edc | 425 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 426 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
427 | * -- Dec 21st 2009, Simon Wunderlich |
428 | */ | |
c6c8fea2 | 429 | |
9cfc7bd6 | 430 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 431 | |
1c9b0550 ML |
432 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
433 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
434 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
435 | |
436 | soft_iface->last_rx = jiffies; | |
437 | ||
74490f96 AQ |
438 | /* Let the bridge loop avoidance check the packet. If will |
439 | * not handle it, we can safely push it up. | |
440 | */ | |
441 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
442 | goto out; | |
443 | ||
37135173 AQ |
444 | if (orig_node) |
445 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 446 | ethhdr->h_source, vid); |
37135173 | 447 | |
42cb0bef AQ |
448 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
449 | /* set the mark on broadcast packets if AP isolation is ON and | |
450 | * the packet is coming from an "isolated" client | |
451 | */ | |
452 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
453 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
454 | vid)) { | |
455 | /* save bits in skb->mark not covered by the mask and | |
456 | * apply the mark on the rest | |
457 | */ | |
458 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
459 | skb->mark |= bat_priv->isolation_mark; | |
460 | } | |
461 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
462 | ethhdr->h_dest, vid)) { | |
59b699cd | 463 | goto dropped; |
42cb0bef | 464 | } |
59b699cd | 465 | |
c6c8fea2 | 466 | netif_rx(skb); |
ba85fac2 | 467 | goto out; |
c6c8fea2 SE |
468 | |
469 | dropped: | |
470 | kfree_skb(skb); | |
471 | out: | |
472 | return; | |
473 | } | |
474 | ||
5d2c05b2 AQ |
475 | /** |
476 | * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and | |
477 | * possibly free it | |
478 | * @softif_vlan: the vlan object to release | |
479 | */ | |
35df3b29 | 480 | void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 481 | { |
35df3b29 AQ |
482 | if (atomic_dec_and_test(&vlan->refcount)) { |
483 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
484 | hlist_del_rcu(&vlan->list); | |
485 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
486 | ||
487 | kfree_rcu(vlan, rcu); | |
488 | } | |
5d2c05b2 AQ |
489 | } |
490 | ||
491 | /** | |
492 | * batadv_softif_vlan_get - get the vlan object for a specific vid | |
493 | * @bat_priv: the bat priv with all the soft interface information | |
494 | * @vid: the identifier of the vlan object to retrieve | |
495 | * | |
496 | * Returns the private data of the vlan matching the vid passed as argument or | |
497 | * NULL otherwise. The refcounter of the returned object is incremented by 1. | |
498 | */ | |
90f4435d AQ |
499 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
500 | unsigned short vid) | |
5d2c05b2 AQ |
501 | { |
502 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
503 | ||
504 | rcu_read_lock(); | |
505 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
506 | if (vlan_tmp->vid != vid) | |
507 | continue; | |
508 | ||
509 | if (!atomic_inc_not_zero(&vlan_tmp->refcount)) | |
510 | continue; | |
511 | ||
512 | vlan = vlan_tmp; | |
513 | break; | |
514 | } | |
515 | rcu_read_unlock(); | |
516 | ||
517 | return vlan; | |
518 | } | |
519 | ||
520 | /** | |
521 | * batadv_create_vlan - allocate the needed resources for a new vlan | |
522 | * @bat_priv: the bat priv with all the soft interface information | |
523 | * @vid: the VLAN identifier | |
524 | * | |
525 | * Returns 0 on success, a negative error otherwise. | |
526 | */ | |
527 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
528 | { | |
529 | struct batadv_softif_vlan *vlan; | |
90f4435d | 530 | int err; |
5d2c05b2 AQ |
531 | |
532 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
533 | if (vlan) { | |
534 | batadv_softif_vlan_free_ref(vlan); | |
535 | return -EEXIST; | |
536 | } | |
537 | ||
538 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
539 | if (!vlan) | |
540 | return -ENOMEM; | |
541 | ||
35df3b29 | 542 | vlan->bat_priv = bat_priv; |
5d2c05b2 AQ |
543 | vlan->vid = vid; |
544 | atomic_set(&vlan->refcount, 1); | |
545 | ||
b8cbd81d AQ |
546 | atomic_set(&vlan->ap_isolation, 0); |
547 | ||
90f4435d AQ |
548 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
549 | if (err) { | |
550 | kfree(vlan); | |
551 | return err; | |
552 | } | |
553 | ||
35df3b29 AQ |
554 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
555 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); | |
556 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
557 | ||
5d2c05b2 AQ |
558 | /* add a new TT local entry. This one will be marked with the NOPURGE |
559 | * flag | |
560 | */ | |
561 | batadv_tt_local_add(bat_priv->soft_iface, | |
562 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 563 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 564 | |
5d2c05b2 AQ |
565 | return 0; |
566 | } | |
567 | ||
568 | /** | |
569 | * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object | |
570 | * @bat_priv: the bat priv with all the soft interface information | |
571 | * @vlan: the object to remove | |
572 | */ | |
573 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
574 | struct batadv_softif_vlan *vlan) | |
575 | { | |
5d2c05b2 AQ |
576 | /* explicitly remove the associated TT local entry because it is marked |
577 | * with the NOPURGE flag | |
578 | */ | |
579 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
580 | vlan->vid, "vlan interface destroyed", false); | |
581 | ||
35df3b29 | 582 | batadv_sysfs_del_vlan(bat_priv, vlan); |
5d2c05b2 AQ |
583 | batadv_softif_vlan_free_ref(vlan); |
584 | } | |
585 | ||
586 | /** | |
587 | * batadv_interface_add_vid - ndo_add_vid API implementation | |
588 | * @dev: the netdev of the mesh interface | |
589 | * @vid: identifier of the new vlan | |
590 | * | |
591 | * Set up all the internal structures for handling the new vlan on top of the | |
592 | * mesh interface | |
593 | * | |
594 | * Returns 0 on success or a negative error code in case of failure. | |
595 | */ | |
596 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
597 | unsigned short vid) | |
598 | { | |
599 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
600 | struct batadv_softif_vlan *vlan; |
601 | int ret; | |
5d2c05b2 AQ |
602 | |
603 | /* only 802.1Q vlans are supported. | |
604 | * batman-adv does not know how to handle other types | |
605 | */ | |
606 | if (proto != htons(ETH_P_8021Q)) | |
607 | return -EINVAL; | |
608 | ||
609 | vid |= BATADV_VLAN_HAS_TAG; | |
610 | ||
35df3b29 AQ |
611 | /* if a new vlan is getting created and it already exists, it means that |
612 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
613 | * refcount in order to revive the object. | |
614 | * | |
615 | * if it does not exist then create it. | |
616 | */ | |
617 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
618 | if (!vlan) | |
619 | return batadv_softif_create_vlan(bat_priv, vid); | |
620 | ||
621 | /* recreate the sysfs object if it was already destroyed (and it should | |
622 | * be since we received a kill_vid() for this vlan | |
623 | */ | |
624 | if (!vlan->kobj) { | |
625 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
626 | if (ret) { | |
627 | batadv_softif_vlan_free_ref(vlan); | |
628 | return ret; | |
629 | } | |
630 | } | |
631 | ||
632 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
633 | * flag. This must be added again, even if the vlan object already | |
634 | * exists, because the entry was deleted by kill_vid() | |
635 | */ | |
636 | batadv_tt_local_add(bat_priv->soft_iface, | |
637 | bat_priv->soft_iface->dev_addr, vid, | |
638 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
639 | ||
640 | return 0; | |
5d2c05b2 AQ |
641 | } |
642 | ||
643 | /** | |
644 | * batadv_interface_kill_vid - ndo_kill_vid API implementation | |
645 | * @dev: the netdev of the mesh interface | |
646 | * @vid: identifier of the deleted vlan | |
647 | * | |
648 | * Destroy all the internal structures used to handle the vlan identified by vid | |
649 | * on top of the mesh interface | |
650 | * | |
651 | * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q | |
652 | * or -ENOENT if the specified vlan id wasn't registered. | |
653 | */ | |
654 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
655 | unsigned short vid) | |
656 | { | |
657 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
658 | struct batadv_softif_vlan *vlan; | |
659 | ||
660 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
661 | * handle other types | |
662 | */ | |
663 | if (proto != htons(ETH_P_8021Q)) | |
664 | return -EINVAL; | |
665 | ||
666 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
667 | if (!vlan) | |
668 | return -ENOENT; | |
669 | ||
670 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
671 | ||
672 | /* finally free the vlan object */ | |
673 | batadv_softif_vlan_free_ref(vlan); | |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
36c1d153 SE |
678 | /* batman-adv network devices have devices nesting below it and are a special |
679 | * "super class" of normal network devices; split their locks off into a | |
680 | * separate class since they always nest. | |
681 | */ | |
682 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
683 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
684 | ||
685 | /** | |
686 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
687 | * @dev: device which owns the tx queue | |
688 | * @txq: tx queue to modify | |
689 | * @_unused: always NULL | |
690 | */ | |
691 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
692 | struct netdev_queue *txq, | |
693 | void *_unused) | |
694 | { | |
695 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
696 | } | |
697 | ||
698 | /** | |
699 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
700 | * @dev: network device to modify | |
701 | */ | |
702 | static void batadv_set_lockdep_class(struct net_device *dev) | |
703 | { | |
704 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
705 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
706 | } | |
707 | ||
5bc44dc8 SW |
708 | /** |
709 | * batadv_softif_destroy_finish - cleans up the remains of a softif | |
710 | * @work: work queue item | |
711 | * | |
712 | * Free the parts of the soft interface which can not be removed under | |
713 | * rtnl lock (to prevent deadlock situations). | |
714 | */ | |
715 | static void batadv_softif_destroy_finish(struct work_struct *work) | |
716 | { | |
5d2c05b2 | 717 | struct batadv_softif_vlan *vlan; |
5bc44dc8 SW |
718 | struct batadv_priv *bat_priv; |
719 | struct net_device *soft_iface; | |
720 | ||
721 | bat_priv = container_of(work, struct batadv_priv, | |
722 | cleanup_work); | |
723 | soft_iface = bat_priv->soft_iface; | |
724 | ||
5d2c05b2 AQ |
725 | /* destroy the "untagged" VLAN */ |
726 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
727 | if (vlan) { | |
728 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
729 | batadv_softif_vlan_free_ref(vlan); | |
730 | } | |
731 | ||
5bc44dc8 | 732 | batadv_sysfs_del_meshif(soft_iface); |
af63fde5 | 733 | unregister_netdev(soft_iface); |
5bc44dc8 SW |
734 | } |
735 | ||
37130293 SE |
736 | /** |
737 | * batadv_softif_init_late - late stage initialization of soft interface | |
738 | * @dev: registered network device to modify | |
739 | * | |
740 | * Returns error code on failures | |
741 | */ | |
742 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 743 | { |
56303d34 | 744 | struct batadv_priv *bat_priv; |
ee75ed88 | 745 | uint32_t random_seqno; |
c6c8fea2 | 746 | int ret; |
d69909d2 | 747 | size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM; |
c6c8fea2 | 748 | |
37130293 | 749 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 750 | |
37130293 SE |
751 | bat_priv = netdev_priv(dev); |
752 | bat_priv->soft_iface = dev; | |
5bc44dc8 | 753 | INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); |
1c9b0550 ML |
754 | |
755 | /* batadv_interface_stats() needs to be available as soon as | |
756 | * register_netdevice() has been called | |
757 | */ | |
758 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t)); | |
759 | if (!bat_priv->bat_counters) | |
37130293 | 760 | return -ENOMEM; |
c6c8fea2 | 761 | |
c6c8fea2 SE |
762 | atomic_set(&bat_priv->aggregated_ogms, 1); |
763 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 764 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 765 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 766 | #endif |
33af49ad AQ |
767 | #ifdef CONFIG_BATMAN_ADV_DAT |
768 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
769 | #endif |
770 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
771 | bat_priv->mcast.flags = BATADV_NO_FLAGS; | |
1d8ab8d3 | 772 | atomic_set(&bat_priv->multicast_mode, 1); |
60432d75 | 773 | atomic_set(&bat_priv->mcast.num_disabled, 0); |
ab49886e | 774 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
775 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
776 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 777 | #endif |
cd646ab1 | 778 | atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); |
c6c8fea2 | 779 | atomic_set(&bat_priv->gw_sel_class, 20); |
414254e3 ML |
780 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
781 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 782 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 783 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 784 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 785 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 786 | #endif |
c6c8fea2 | 787 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 788 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
789 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
790 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 791 | |
39c75a51 | 792 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 793 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
794 | atomic_set(&bat_priv->tt.vn, 0); |
795 | atomic_set(&bat_priv->tt.local_changes, 0); | |
796 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
797 | #ifdef CONFIG_BATMAN_ADV_BLA | |
798 | atomic_set(&bat_priv->bla.num_requests, 0); | |
799 | #endif | |
800 | bat_priv->tt.last_changeset = NULL; | |
801 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
802 | bat_priv->isolation_mark = 0; |
803 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 804 | |
ee75ed88 MH |
805 | /* randomize initial seqno to avoid collision */ |
806 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
807 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
808 | ||
c6c8fea2 SE |
809 | bat_priv->primary_if = NULL; |
810 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 811 | |
d353d8d4 MH |
812 | batadv_nc_init_bat_priv(bat_priv); |
813 | ||
37130293 | 814 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 815 | if (ret < 0) |
37130293 | 816 | goto free_bat_counters; |
c6c8fea2 | 817 | |
37130293 | 818 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 819 | if (ret < 0) |
37130293 | 820 | goto free_bat_counters; |
c6c8fea2 | 821 | |
37130293 | 822 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
823 | if (ret < 0) |
824 | goto unreg_debugfs; | |
825 | ||
37130293 | 826 | return 0; |
c6c8fea2 SE |
827 | |
828 | unreg_debugfs: | |
37130293 | 829 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
830 | free_bat_counters: |
831 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 832 | bat_priv->bat_counters = NULL; |
37130293 SE |
833 | |
834 | return ret; | |
835 | } | |
836 | ||
3dbd550b SE |
837 | /** |
838 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
839 | * @dev: batadv_soft_interface used as master interface | |
840 | * @slave_dev: net_device which should become the slave interface | |
841 | * | |
842 | * Return 0 if successful or error otherwise. | |
843 | */ | |
844 | static int batadv_softif_slave_add(struct net_device *dev, | |
845 | struct net_device *slave_dev) | |
846 | { | |
847 | struct batadv_hard_iface *hard_iface; | |
848 | int ret = -EINVAL; | |
849 | ||
850 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 851 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
852 | goto out; |
853 | ||
854 | ret = batadv_hardif_enable_interface(hard_iface, dev->name); | |
855 | ||
856 | out: | |
857 | if (hard_iface) | |
858 | batadv_hardif_free_ref(hard_iface); | |
859 | return ret; | |
860 | } | |
861 | ||
862 | /** | |
863 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
864 | * @dev: batadv_soft_interface used as master interface | |
865 | * @slave_dev: net_device which should be removed from the master interface | |
866 | * | |
867 | * Return 0 if successful or error otherwise. | |
868 | */ | |
869 | static int batadv_softif_slave_del(struct net_device *dev, | |
870 | struct net_device *slave_dev) | |
871 | { | |
872 | struct batadv_hard_iface *hard_iface; | |
873 | int ret = -EINVAL; | |
874 | ||
875 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
876 | ||
877 | if (!hard_iface || hard_iface->soft_iface != dev) | |
878 | goto out; | |
879 | ||
880 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
881 | ret = 0; | |
882 | ||
883 | out: | |
884 | if (hard_iface) | |
885 | batadv_hardif_free_ref(hard_iface); | |
886 | return ret; | |
887 | } | |
888 | ||
37130293 SE |
889 | static const struct net_device_ops batadv_netdev_ops = { |
890 | .ndo_init = batadv_softif_init_late, | |
891 | .ndo_open = batadv_interface_open, | |
892 | .ndo_stop = batadv_interface_release, | |
893 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
894 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
895 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
896 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
897 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 898 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 899 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
900 | .ndo_validate_addr = eth_validate_addr, |
901 | .ndo_add_slave = batadv_softif_slave_add, | |
902 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
903 | }; |
904 | ||
b3246020 SE |
905 | /** |
906 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
907 | * @dev: Device to cleanup and remove | |
908 | */ | |
909 | static void batadv_softif_free(struct net_device *dev) | |
910 | { | |
911 | batadv_debugfs_del_meshif(dev); | |
912 | batadv_mesh_free(dev); | |
0c501345 AQ |
913 | |
914 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
915 | * their tasks. Wait for them all to be finished before freeing the | |
916 | * netdev and its private data (bat_priv) | |
917 | */ | |
918 | rcu_barrier(); | |
919 | ||
b3246020 SE |
920 | free_netdev(dev); |
921 | } | |
922 | ||
37130293 SE |
923 | /** |
924 | * batadv_softif_init_early - early stage initialization of soft interface | |
925 | * @dev: registered network device to modify | |
926 | */ | |
927 | static void batadv_softif_init_early(struct net_device *dev) | |
928 | { | |
929 | struct batadv_priv *priv = netdev_priv(dev); | |
930 | ||
931 | ether_setup(dev); | |
932 | ||
933 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 934 | dev->destructor = batadv_softif_free; |
5d2c05b2 | 935 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
37130293 SE |
936 | dev->tx_queue_len = 0; |
937 | ||
938 | /* can't call min_mtu, because the needed variables | |
939 | * have not been initialized yet | |
940 | */ | |
941 | dev->mtu = ETH_DATA_LEN; | |
942 | /* reserve more space in the skbuff for our header */ | |
411d6ed9 | 943 | dev->hard_header_len = batadv_max_header_len(); |
37130293 SE |
944 | |
945 | /* generate random address */ | |
946 | eth_hw_addr_random(dev); | |
947 | ||
7ad24ea4 | 948 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
949 | |
950 | memset(priv, 0, sizeof(*priv)); | |
951 | } | |
952 | ||
953 | struct net_device *batadv_softif_create(const char *name) | |
954 | { | |
955 | struct net_device *soft_iface; | |
956 | int ret; | |
957 | ||
958 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 959 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
960 | if (!soft_iface) |
961 | return NULL; | |
962 | ||
a4ac28c0 SE |
963 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
964 | ||
37130293 SE |
965 | ret = register_netdevice(soft_iface); |
966 | if (ret < 0) { | |
967 | pr_err("Unable to register the batman interface '%s': %i\n", | |
968 | name, ret); | |
969 | free_netdev(soft_iface); | |
970 | return NULL; | |
971 | } | |
972 | ||
973 | return soft_iface; | |
c6c8fea2 SE |
974 | } |
975 | ||
e07932ae ML |
976 | /** |
977 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
978 | * @soft_iface: the to-be-removed batman-adv interface | |
979 | */ | |
980 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 981 | { |
5bc44dc8 SW |
982 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
983 | ||
5bc44dc8 | 984 | queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); |
c6c8fea2 SE |
985 | } |
986 | ||
a4ac28c0 SE |
987 | /** |
988 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
989 | * @soft_iface: the to-be-removed batman-adv interface | |
990 | * @head: list pointer | |
991 | */ | |
992 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
993 | struct list_head *head) | |
994 | { | |
995 | struct batadv_hard_iface *hard_iface; | |
996 | ||
997 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
998 | if (hard_iface->soft_iface == soft_iface) | |
999 | batadv_hardif_disable_interface(hard_iface, | |
1000 | BATADV_IF_CLEANUP_KEEP); | |
1001 | } | |
1002 | ||
1003 | batadv_sysfs_del_meshif(soft_iface); | |
1004 | unregister_netdevice_queue(soft_iface, head); | |
1005 | } | |
1006 | ||
04b482a2 | 1007 | int batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1008 | { |
0294ca0d | 1009 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
e44d8fe2 | 1010 | return 1; |
e44d8fe2 SE |
1011 | |
1012 | return 0; | |
1013 | } | |
1014 | ||
a4ac28c0 SE |
1015 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1016 | .kind = "batadv", | |
1017 | .priv_size = sizeof(struct batadv_priv), | |
1018 | .setup = batadv_softif_init_early, | |
1019 | .dellink = batadv_softif_destroy_netlink, | |
1020 | }; | |
1021 | ||
c6c8fea2 | 1022 | /* ethtool */ |
0294ca0d | 1023 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
1024 | { |
1025 | cmd->supported = 0; | |
1026 | cmd->advertising = 0; | |
70739497 | 1027 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
1028 | cmd->duplex = DUPLEX_FULL; |
1029 | cmd->port = PORT_TP; | |
1030 | cmd->phy_address = 0; | |
1031 | cmd->transceiver = XCVR_INTERNAL; | |
1032 | cmd->autoneg = AUTONEG_DISABLE; | |
1033 | cmd->maxtxpkt = 0; | |
1034 | cmd->maxrxpkt = 0; | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
0294ca0d SE |
1039 | static void batadv_get_drvinfo(struct net_device *dev, |
1040 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 1041 | { |
7826d43f JP |
1042 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
1043 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
1044 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
1045 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
1046 | } |
1047 | ||
0294ca0d | 1048 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
1049 | { |
1050 | return -EOPNOTSUPP; | |
1051 | } | |
1052 | ||
0294ca0d | 1053 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
1054 | { |
1055 | } | |
1056 | ||
0294ca0d | 1057 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
1058 | { |
1059 | return 1; | |
1060 | } | |
f8214865 MH |
1061 | |
1062 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
1063 | * Declare each description string in struct.name[] to get fixed sized buffer | |
1064 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
1065 | */ | |
1066 | static const struct { | |
1067 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 1068 | } batadv_counters_strings[] = { |
1c9b0550 ML |
1069 | { "tx" }, |
1070 | { "tx_bytes" }, | |
1071 | { "tx_dropped" }, | |
1072 | { "rx" }, | |
1073 | { "rx_bytes" }, | |
f8214865 MH |
1074 | { "forward" }, |
1075 | { "forward_bytes" }, | |
1076 | { "mgmt_tx" }, | |
1077 | { "mgmt_tx_bytes" }, | |
1078 | { "mgmt_rx" }, | |
1079 | { "mgmt_rx_bytes" }, | |
ee75ed88 MH |
1080 | { "frag_tx" }, |
1081 | { "frag_tx_bytes" }, | |
610bfc6b MH |
1082 | { "frag_rx" }, |
1083 | { "frag_rx_bytes" }, | |
1084 | { "frag_fwd" }, | |
1085 | { "frag_fwd_bytes" }, | |
f8214865 MH |
1086 | { "tt_request_tx" }, |
1087 | { "tt_request_rx" }, | |
1088 | { "tt_response_tx" }, | |
1089 | { "tt_response_rx" }, | |
1090 | { "tt_roam_adv_tx" }, | |
1091 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
1092 | #ifdef CONFIG_BATMAN_ADV_DAT |
1093 | { "dat_get_tx" }, | |
1094 | { "dat_get_rx" }, | |
1095 | { "dat_put_tx" }, | |
1096 | { "dat_put_rx" }, | |
1097 | { "dat_cached_reply_tx" }, | |
1098 | #endif | |
3c12de9a MH |
1099 | #ifdef CONFIG_BATMAN_ADV_NC |
1100 | { "nc_code" }, | |
1101 | { "nc_code_bytes" }, | |
1102 | { "nc_recode" }, | |
1103 | { "nc_recode_bytes" }, | |
612d2b4f | 1104 | { "nc_buffer" }, |
2df5278b MH |
1105 | { "nc_decode" }, |
1106 | { "nc_decode_bytes" }, | |
1107 | { "nc_decode_failed" }, | |
1108 | { "nc_sniffed" }, | |
3c12de9a | 1109 | #endif |
f8214865 MH |
1110 | }; |
1111 | ||
1112 | static void batadv_get_strings(struct net_device *dev, uint32_t stringset, | |
1113 | uint8_t *data) | |
1114 | { | |
1115 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
1116 | memcpy(data, batadv_counters_strings, |
1117 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
1118 | } |
1119 | ||
1120 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
1121 | struct ethtool_stats *stats, | |
1122 | uint64_t *data) | |
1123 | { | |
56303d34 | 1124 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
1125 | int i; |
1126 | ||
d69909d2 | 1127 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
1128 | data[i] = batadv_sum_counter(bat_priv, i); |
1129 | } | |
1130 | ||
1131 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1132 | { | |
1133 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 1134 | return BATADV_CNT_NUM; |
f8214865 MH |
1135 | |
1136 | return -EOPNOTSUPP; | |
1137 | } |