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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> | |
c408c1b9 | 25 | #include <linux/cpumask.h> |
1e2c2a4f | 26 | #include <linux/errno.h> |
c6c8fea2 | 27 | #include <linux/etherdevice.h> |
1e2c2a4f SE |
28 | #include <linux/ethtool.h> |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
c6c8fea2 | 31 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
32 | #include <linux/jiffies.h> |
33 | #include <linux/kernel.h> | |
6be4d30c | 34 | #include <linux/kref.h> |
1e2c2a4f SE |
35 | #include <linux/list.h> |
36 | #include <linux/lockdep.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/percpu.h> | |
39 | #include <linux/printk.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <linux/rcupdate.h> | |
569c9850 | 43 | #include <linux/rtnetlink.h> |
1e2c2a4f SE |
44 | #include <linux/skbuff.h> |
45 | #include <linux/slab.h> | |
46 | #include <linux/socket.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/stddef.h> | |
49 | #include <linux/string.h> | |
50 | #include <linux/types.h> | |
1e2c2a4f | 51 | |
01d350d1 | 52 | #include "bat_algo.h" |
23721387 | 53 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
54 | #include "debugfs.h" |
55 | #include "distributed-arp-table.h" | |
56 | #include "gateway_client.h" | |
57 | #include "gateway_common.h" | |
58 | #include "hard-interface.h" | |
59 | #include "multicast.h" | |
d353d8d4 | 60 | #include "network-coding.h" |
f19dc777 | 61 | #include "originator.h" |
1e2c2a4f SE |
62 | #include "packet.h" |
63 | #include "send.h" | |
64 | #include "sysfs.h" | |
65 | #include "translation-table.h" | |
c6c8fea2 | 66 | |
0294ca0d SE |
67 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
68 | static void batadv_get_drvinfo(struct net_device *dev, | |
69 | struct ethtool_drvinfo *info); | |
70 | static u32 batadv_get_msglevel(struct net_device *dev); | |
71 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
72 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
73 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
74 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
75 | struct ethtool_stats *stats, u64 *data); | |
76 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 77 | |
0294ca0d SE |
78 | static const struct ethtool_ops batadv_ethtool_ops = { |
79 | .get_settings = batadv_get_settings, | |
80 | .get_drvinfo = batadv_get_drvinfo, | |
81 | .get_msglevel = batadv_get_msglevel, | |
82 | .set_msglevel = batadv_set_msglevel, | |
83 | .get_link = batadv_get_link, | |
f8214865 MH |
84 | .get_strings = batadv_get_strings, |
85 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
86 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
87 | }; |
88 | ||
04b482a2 | 89 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
90 | { |
91 | int result; | |
92 | ||
9cfc7bd6 | 93 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
94 | * data using skb_header_release in our skbs to allow skb_cow_header to |
95 | * work optimally. This means that those skbs are not allowed to read | |
96 | * or write any data which is before the current position of skb->data | |
97 | * after that call and thus allow other skbs with the same data buffer | |
98 | * to write freely in that area. | |
99 | */ | |
100 | result = skb_cow_head(skb, len); | |
101 | if (result < 0) | |
102 | return result; | |
103 | ||
104 | skb_push(skb, len); | |
105 | return 0; | |
106 | } | |
107 | ||
0294ca0d | 108 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
109 | { |
110 | netif_start_queue(dev); | |
111 | return 0; | |
112 | } | |
113 | ||
0294ca0d | 114 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
115 | { |
116 | netif_stop_queue(dev); | |
117 | return 0; | |
118 | } | |
119 | ||
c408c1b9 SE |
120 | /** |
121 | * batadv_sum_counter - Sum the cpu-local counters for index 'idx' | |
122 | * @bat_priv: the bat priv with all the soft interface information | |
123 | * @idx: index of counter to sum up | |
124 | * | |
125 | * Return: sum of all cpu-local counters | |
126 | */ | |
127 | static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) | |
128 | { | |
129 | u64 *counters, sum = 0; | |
130 | int cpu; | |
131 | ||
132 | for_each_possible_cpu(cpu) { | |
133 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
134 | sum += counters[idx]; | |
135 | } | |
136 | ||
137 | return sum; | |
138 | } | |
139 | ||
0294ca0d | 140 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 141 | { |
56303d34 | 142 | struct batadv_priv *bat_priv = netdev_priv(dev); |
1c9b0550 ML |
143 | struct net_device_stats *stats = &bat_priv->stats; |
144 | ||
145 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
146 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
147 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
148 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
149 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
150 | return stats; | |
c6c8fea2 SE |
151 | } |
152 | ||
0294ca0d | 153 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 154 | { |
56303d34 | 155 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 156 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 157 | struct sockaddr *addr = p; |
6b5e971a | 158 | u8 old_addr[ETH_ALEN]; |
c6c8fea2 SE |
159 | |
160 | if (!is_valid_ether_addr(addr->sa_data)) | |
161 | return -EADDRNOTAVAIL; | |
162 | ||
8fdd0153 AQ |
163 | ether_addr_copy(old_addr, dev->dev_addr); |
164 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 165 | |
015758d0 | 166 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
167 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
168 | return 0; | |
169 | ||
170 | rcu_read_lock(); | |
171 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
172 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 173 | "mac address changed", false); |
94d1dd87 | 174 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 175 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 176 | } |
94d1dd87 | 177 | rcu_read_unlock(); |
c6c8fea2 | 178 | |
c6c8fea2 SE |
179 | return 0; |
180 | } | |
181 | ||
0294ca0d | 182 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
183 | { |
184 | /* check ranges */ | |
9563877e | 185 | if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) |
c6c8fea2 SE |
186 | return -EINVAL; |
187 | ||
188 | dev->mtu = new_mtu; | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
a4deee1a LL |
193 | /** |
194 | * batadv_interface_set_rx_mode - set the rx mode of a device | |
195 | * @dev: registered network device to modify | |
196 | * | |
197 | * We do not actually need to set any rx filters for the virtual batman | |
198 | * soft interface. However a dummy handler enables a user to set static | |
199 | * multicast listeners for instance. | |
200 | */ | |
201 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
202 | { | |
203 | } | |
204 | ||
0294ca0d SE |
205 | static int batadv_interface_tx(struct sk_buff *skb, |
206 | struct net_device *soft_iface) | |
c6c8fea2 | 207 | { |
c018ad3d | 208 | struct ethhdr *ethhdr; |
56303d34 SE |
209 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
210 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 211 | struct batadv_bcast_packet *bcast_packet; |
6b5e971a SE |
212 | static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
213 | 0x00, 0x00}; | |
214 | static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
215 | 0x00, 0x00}; | |
6c413b1c | 216 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
6b5e971a | 217 | u8 *dst_hint = NULL, chaddr[ETH_ALEN]; |
c018ad3d | 218 | struct vlan_ethhdr *vhdr; |
be7af5cf | 219 | unsigned int header_len = 0; |
c6c8fea2 | 220 | int data_len = skb->len, ret; |
c018ad3d | 221 | unsigned long brd_delay = 1; |
a19d3d85 | 222 | bool do_bcast = false, client_added; |
c018ad3d | 223 | unsigned short vid; |
6b5e971a | 224 | u32 seqno; |
6c413b1c | 225 | int gw_mode; |
1d8ab8d3 LL |
226 | enum batadv_forw_mode forw_mode; |
227 | struct batadv_orig_node *mcast_single_orig = NULL; | |
53cf037b | 228 | int network_offset = ETH_HLEN; |
c6c8fea2 | 229 | |
39c75a51 | 230 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
231 | goto dropped; |
232 | ||
860e9538 | 233 | netif_trans_update(soft_iface); |
c018ad3d | 234 | vid = batadv_get_vid(skb, 0); |
927c2ed7 | 235 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
236 | |
237 | switch (ntohs(ethhdr->h_proto)) { | |
238 | case ETH_P_8021Q: | |
927c2ed7 | 239 | vhdr = vlan_eth_hdr(skb); |
c6c8fea2 | 240 | |
9d1601ef ML |
241 | /* drop batman-in-batman packets to prevent loops */ |
242 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { | |
53cf037b | 243 | network_offset += VLAN_HLEN; |
c6c8fea2 | 244 | break; |
53cf037b | 245 | } |
c6c8fea2 SE |
246 | |
247 | /* fall through */ | |
af5d4f77 | 248 | case ETH_P_BATMAN: |
c6c8fea2 | 249 | goto dropped; |
a7f6ee94 | 250 | } |
c6c8fea2 | 251 | |
53cf037b LL |
252 | skb_set_network_header(skb, network_offset); |
253 | ||
08adf151 | 254 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
255 | goto dropped; |
256 | ||
9d2c9488 | 257 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 258 | ethhdr = eth_hdr(skb); |
9d2c9488 | 259 | |
a73105b8 | 260 | /* Register the client MAC in the transtable */ |
a19d3d85 ML |
261 | if (!is_multicast_ether_addr(ethhdr->h_source)) { |
262 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, | |
9464d071 AQ |
263 | vid, skb->skb_iif, |
264 | skb->mark); | |
a19d3d85 ML |
265 | if (!client_added) |
266 | goto dropped; | |
267 | } | |
c6c8fea2 | 268 | |
b1a8c04b SW |
269 | /* don't accept stp packets. STP does not help in meshes. |
270 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
271 | * |
272 | * The same goes for ECTP sent at least by some Cisco Switches, | |
273 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 274 | */ |
1eda58bf | 275 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
276 | goto dropped; |
277 | ||
4934ab95 SW |
278 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
279 | goto dropped; | |
280 | ||
3a24a63e | 281 | gw_mode = atomic_read(&bat_priv->gw.mode); |
be7af5cf | 282 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
283 | /* if gw mode is off, broadcast every packet */ |
284 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
285 | do_bcast = true; | |
286 | goto send; | |
be7af5cf | 287 | } |
9d2c9488 | 288 | |
6c413b1c AQ |
289 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
290 | chaddr); | |
291 | /* skb->data may have been modified by | |
292 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 293 | */ |
927c2ed7 | 294 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
295 | /* if gw_mode is on, broadcast any non-DHCP message. |
296 | * All the DHCP packets are going to be sent as unicast | |
297 | */ | |
298 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
299 | do_bcast = true; | |
300 | goto send; | |
301 | } | |
302 | ||
303 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
304 | dst_hint = chaddr; | |
305 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
306 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
307 | /* gateways should not forward any DHCP message if | |
308 | * directed to a DHCP server | |
309 | */ | |
310 | goto dropped; | |
c6c8fea2 | 311 | |
6c413b1c | 312 | send: |
1d8ab8d3 LL |
313 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
314 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
315 | &mcast_single_orig); | |
316 | if (forw_mode == BATADV_FORW_NONE) | |
317 | goto dropped; | |
318 | ||
319 | if (forw_mode == BATADV_FORW_SINGLE) | |
320 | do_bcast = false; | |
321 | } | |
322 | } | |
323 | ||
c54f38c9 SW |
324 | batadv_skb_set_priority(skb, 0); |
325 | ||
c6c8fea2 SE |
326 | /* ethernet packet should be broadcasted */ |
327 | if (do_bcast) { | |
e5d89254 | 328 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 329 | if (!primary_if) |
c6c8fea2 SE |
330 | goto dropped; |
331 | ||
c384ea3e AQ |
332 | /* in case of ARP request, we do not immediately broadcasti the |
333 | * packet, instead we first wait for DAT to try to retrieve the | |
334 | * correct ARP entry | |
335 | */ | |
336 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
337 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
338 | ||
04b482a2 | 339 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
340 | goto dropped; |
341 | ||
96412690 | 342 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
343 | bcast_packet->version = BATADV_COMPAT_VERSION; |
344 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
345 | |
346 | /* batman packet type: broadcast */ | |
a40d9b07 | 347 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 348 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
349 | |
350 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
351 | * this mac is known throughout the mesh |
352 | */ | |
8fdd0153 AQ |
353 | ether_addr_copy(bcast_packet->orig, |
354 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
355 | |
356 | /* set broadcast sequence number */ | |
bbb1f90e SE |
357 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
358 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 359 | |
3111beed | 360 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true); |
c6c8fea2 SE |
361 | |
362 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
363 | * the original skb. |
364 | */ | |
bd687fe4 | 365 | consume_skb(skb); |
c6c8fea2 SE |
366 | |
367 | /* unicast packet */ | |
368 | } else { | |
6c413b1c AQ |
369 | /* DHCP packets going to a server will use the GW feature */ |
370 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 371 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
372 | if (ret) |
373 | goto dropped; | |
e300d314 | 374 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
375 | } else if (mcast_single_orig) { |
376 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
377 | BATADV_UNICAST, 0, | |
378 | mcast_single_orig, vid); | |
6c413b1c AQ |
379 | } else { |
380 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
381 | skb)) | |
382 | goto dropped; | |
e300d314 | 383 | |
6c413b1c AQ |
384 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
385 | ||
386 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
387 | vid); | |
388 | } | |
eaac2c87 | 389 | if (ret != NET_XMIT_SUCCESS) |
c6c8fea2 SE |
390 | goto dropped_freed; |
391 | } | |
392 | ||
1c9b0550 ML |
393 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
394 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
395 | goto end; |
396 | ||
397 | dropped: | |
398 | kfree_skb(skb); | |
399 | dropped_freed: | |
1c9b0550 | 400 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 401 | end: |
f19dc777 SE |
402 | if (mcast_single_orig) |
403 | batadv_orig_node_put(mcast_single_orig); | |
32ae9b22 | 404 | if (primary_if) |
82047ad7 | 405 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
406 | return NETDEV_TX_OK; |
407 | } | |
408 | ||
f298cb94 SE |
409 | /** |
410 | * batadv_interface_rx - receive ethernet frame on local batman-adv interface | |
411 | * @soft_iface: local interface which will receive the ethernet frame | |
412 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
413 | * @hdr_size: size of already parsed batman-adv header |
414 | * @orig_node: originator from which the batman-adv packet was sent | |
415 | * | |
416 | * Sends a ethernet frame to the receive path of the local @soft_iface. | |
417 | * skb->data has still point to the batman-adv header with the size @hdr_size. | |
418 | * The caller has to have parsed this header already and made sure that at least | |
419 | * @hdr_size bytes are still available for pull in @skb. | |
420 | * | |
421 | * The packet may still get dropped. This can happen when the encapsulated | |
422 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
423 | * unicast packets will be dropped directly when it was sent between two | |
424 | * isolated clients. | |
425 | */ | |
04b482a2 | 426 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
427 | struct sk_buff *skb, int hdr_size, |
428 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 429 | { |
a40d9b07 | 430 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 431 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
432 | struct vlan_ethhdr *vhdr; |
433 | struct ethhdr *ethhdr; | |
434 | unsigned short vid; | |
2d3f6ccc SW |
435 | bool is_bcast; |
436 | ||
a40d9b07 SW |
437 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
438 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 | 439 | |
c6c8fea2 SE |
440 | skb_pull_rcsum(skb, hdr_size); |
441 | skb_reset_mac_header(skb); | |
442 | ||
55883fd1 AQ |
443 | /* clean the netfilter state now that the batman-adv header has been |
444 | * removed | |
445 | */ | |
446 | nf_reset(skb); | |
447 | ||
c7829666 SE |
448 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
449 | goto dropped; | |
450 | ||
2b1e2cb3 | 451 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 452 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
453 | |
454 | switch (ntohs(ethhdr->h_proto)) { | |
455 | case ETH_P_8021Q: | |
c7829666 SE |
456 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
457 | goto dropped; | |
458 | ||
c6c8fea2 | 459 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 460 | |
9d1601ef ML |
461 | /* drop batman-in-batman packets to prevent loops */ |
462 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
463 | break; |
464 | ||
465 | /* fall through */ | |
af5d4f77 | 466 | case ETH_P_BATMAN: |
c6c8fea2 SE |
467 | goto dropped; |
468 | } | |
469 | ||
c6c8fea2 | 470 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 SE |
471 | skb->protocol = eth_type_trans(skb, soft_iface); |
472 | ||
25985edc | 473 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 474 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
475 | * -- Dec 21st 2009, Simon Wunderlich |
476 | */ | |
c6c8fea2 | 477 | |
9cfc7bd6 | 478 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 479 | |
1c9b0550 ML |
480 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
481 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
482 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
483 | |
484 | soft_iface->last_rx = jiffies; | |
485 | ||
74490f96 AQ |
486 | /* Let the bridge loop avoidance check the packet. If will |
487 | * not handle it, we can safely push it up. | |
488 | */ | |
489 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
490 | goto out; | |
491 | ||
37135173 AQ |
492 | if (orig_node) |
493 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 494 | ethhdr->h_source, vid); |
37135173 | 495 | |
42cb0bef AQ |
496 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
497 | /* set the mark on broadcast packets if AP isolation is ON and | |
498 | * the packet is coming from an "isolated" client | |
499 | */ | |
500 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
501 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
502 | vid)) { | |
503 | /* save bits in skb->mark not covered by the mask and | |
504 | * apply the mark on the rest | |
505 | */ | |
506 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
507 | skb->mark |= bat_priv->isolation_mark; | |
508 | } | |
509 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
510 | ethhdr->h_dest, vid)) { | |
59b699cd | 511 | goto dropped; |
42cb0bef | 512 | } |
59b699cd | 513 | |
c6c8fea2 | 514 | netif_rx(skb); |
ba85fac2 | 515 | goto out; |
c6c8fea2 SE |
516 | |
517 | dropped: | |
518 | kfree_skb(skb); | |
519 | out: | |
520 | return; | |
521 | } | |
522 | ||
6be4d30c SE |
523 | /** |
524 | * batadv_softif_vlan_release - release vlan from lists and queue for free after | |
525 | * rcu grace period | |
526 | * @ref: kref pointer of the vlan object | |
527 | */ | |
528 | static void batadv_softif_vlan_release(struct kref *ref) | |
529 | { | |
530 | struct batadv_softif_vlan *vlan; | |
531 | ||
532 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
533 | ||
534 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
535 | hlist_del_rcu(&vlan->list); | |
536 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
537 | ||
538 | kfree_rcu(vlan, rcu); | |
539 | } | |
540 | ||
5d2c05b2 | 541 | /** |
9c3bf081 | 542 | * batadv_softif_vlan_put - decrease the vlan object refcounter and |
6be4d30c | 543 | * possibly release it |
e51f0397 | 544 | * @vlan: the vlan object to release |
5d2c05b2 | 545 | */ |
9c3bf081 | 546 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 547 | { |
354136bc ML |
548 | if (!vlan) |
549 | return; | |
550 | ||
6be4d30c | 551 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
552 | } |
553 | ||
554 | /** | |
555 | * batadv_softif_vlan_get - get the vlan object for a specific vid | |
556 | * @bat_priv: the bat priv with all the soft interface information | |
557 | * @vid: the identifier of the vlan object to retrieve | |
558 | * | |
62fe710f | 559 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
560 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
561 | */ | |
90f4435d AQ |
562 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
563 | unsigned short vid) | |
5d2c05b2 AQ |
564 | { |
565 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
566 | ||
567 | rcu_read_lock(); | |
568 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
569 | if (vlan_tmp->vid != vid) | |
570 | continue; | |
571 | ||
6be4d30c | 572 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
573 | continue; |
574 | ||
575 | vlan = vlan_tmp; | |
576 | break; | |
577 | } | |
578 | rcu_read_unlock(); | |
579 | ||
580 | return vlan; | |
581 | } | |
582 | ||
583 | /** | |
6d030de8 | 584 | * batadv_softif_create_vlan - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
585 | * @bat_priv: the bat priv with all the soft interface information |
586 | * @vid: the VLAN identifier | |
587 | * | |
62fe710f | 588 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
589 | */ |
590 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
591 | { | |
592 | struct batadv_softif_vlan *vlan; | |
90f4435d | 593 | int err; |
5d2c05b2 AQ |
594 | |
595 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
596 | if (vlan) { | |
9c3bf081 | 597 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
598 | return -EEXIST; |
599 | } | |
600 | ||
601 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
602 | if (!vlan) | |
603 | return -ENOMEM; | |
604 | ||
35df3b29 | 605 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 606 | vlan->vid = vid; |
6be4d30c | 607 | kref_init(&vlan->refcount); |
5d2c05b2 | 608 | |
b8cbd81d AQ |
609 | atomic_set(&vlan->ap_isolation, 0); |
610 | ||
90f4435d AQ |
611 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
612 | if (err) { | |
613 | kfree(vlan); | |
614 | return err; | |
615 | } | |
616 | ||
35df3b29 | 617 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
df28ca6b | 618 | kref_get(&vlan->refcount); |
35df3b29 AQ |
619 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); |
620 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
621 | ||
5d2c05b2 AQ |
622 | /* add a new TT local entry. This one will be marked with the NOPURGE |
623 | * flag | |
624 | */ | |
625 | batadv_tt_local_add(bat_priv->soft_iface, | |
626 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 627 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 628 | |
df28ca6b SE |
629 | /* don't return reference to new softif_vlan */ |
630 | batadv_softif_vlan_put(vlan); | |
631 | ||
5d2c05b2 AQ |
632 | return 0; |
633 | } | |
634 | ||
635 | /** | |
636 | * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object | |
637 | * @bat_priv: the bat priv with all the soft interface information | |
638 | * @vlan: the object to remove | |
639 | */ | |
640 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
641 | struct batadv_softif_vlan *vlan) | |
642 | { | |
5d2c05b2 AQ |
643 | /* explicitly remove the associated TT local entry because it is marked |
644 | * with the NOPURGE flag | |
645 | */ | |
646 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
647 | vlan->vid, "vlan interface destroyed", false); | |
648 | ||
35df3b29 | 649 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 650 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
651 | } |
652 | ||
653 | /** | |
654 | * batadv_interface_add_vid - ndo_add_vid API implementation | |
655 | * @dev: the netdev of the mesh interface | |
7afcbbef | 656 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
657 | * @vid: identifier of the new vlan |
658 | * | |
659 | * Set up all the internal structures for handling the new vlan on top of the | |
660 | * mesh interface | |
661 | * | |
62fe710f | 662 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
663 | */ |
664 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
665 | unsigned short vid) | |
666 | { | |
667 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
668 | struct batadv_softif_vlan *vlan; |
669 | int ret; | |
5d2c05b2 AQ |
670 | |
671 | /* only 802.1Q vlans are supported. | |
672 | * batman-adv does not know how to handle other types | |
673 | */ | |
674 | if (proto != htons(ETH_P_8021Q)) | |
675 | return -EINVAL; | |
676 | ||
677 | vid |= BATADV_VLAN_HAS_TAG; | |
678 | ||
35df3b29 AQ |
679 | /* if a new vlan is getting created and it already exists, it means that |
680 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
681 | * refcount in order to revive the object. | |
682 | * | |
683 | * if it does not exist then create it. | |
684 | */ | |
685 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
686 | if (!vlan) | |
687 | return batadv_softif_create_vlan(bat_priv, vid); | |
688 | ||
689 | /* recreate the sysfs object if it was already destroyed (and it should | |
690 | * be since we received a kill_vid() for this vlan | |
691 | */ | |
692 | if (!vlan->kobj) { | |
693 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
694 | if (ret) { | |
9c3bf081 | 695 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
696 | return ret; |
697 | } | |
698 | } | |
699 | ||
700 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
701 | * flag. This must be added again, even if the vlan object already | |
702 | * exists, because the entry was deleted by kill_vid() | |
703 | */ | |
704 | batadv_tt_local_add(bat_priv->soft_iface, | |
705 | bat_priv->soft_iface->dev_addr, vid, | |
706 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
707 | ||
708 | return 0; | |
5d2c05b2 AQ |
709 | } |
710 | ||
711 | /** | |
712 | * batadv_interface_kill_vid - ndo_kill_vid API implementation | |
713 | * @dev: the netdev of the mesh interface | |
7afcbbef | 714 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
715 | * @vid: identifier of the deleted vlan |
716 | * | |
717 | * Destroy all the internal structures used to handle the vlan identified by vid | |
718 | * on top of the mesh interface | |
719 | * | |
62fe710f | 720 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
721 | * or -ENOENT if the specified vlan id wasn't registered. |
722 | */ | |
723 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
724 | unsigned short vid) | |
725 | { | |
726 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
727 | struct batadv_softif_vlan *vlan; | |
728 | ||
729 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
730 | * handle other types | |
731 | */ | |
732 | if (proto != htons(ETH_P_8021Q)) | |
733 | return -EINVAL; | |
734 | ||
735 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
736 | if (!vlan) | |
737 | return -ENOENT; | |
738 | ||
739 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
740 | ||
741 | /* finally free the vlan object */ | |
9c3bf081 | 742 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
743 | |
744 | return 0; | |
745 | } | |
746 | ||
36c1d153 SE |
747 | /* batman-adv network devices have devices nesting below it and are a special |
748 | * "super class" of normal network devices; split their locks off into a | |
749 | * separate class since they always nest. | |
750 | */ | |
751 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
752 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
753 | ||
754 | /** | |
755 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
756 | * @dev: device which owns the tx queue | |
757 | * @txq: tx queue to modify | |
758 | * @_unused: always NULL | |
759 | */ | |
760 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
761 | struct netdev_queue *txq, | |
762 | void *_unused) | |
763 | { | |
764 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
765 | } | |
766 | ||
767 | /** | |
768 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
769 | * @dev: network device to modify | |
770 | */ | |
771 | static void batadv_set_lockdep_class(struct net_device *dev) | |
772 | { | |
773 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
774 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
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; | |
1c9b0550 ML |
794 | |
795 | /* batadv_interface_stats() needs to be available as soon as | |
796 | * register_netdevice() has been called | |
797 | */ | |
6b5e971a | 798 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 799 | if (!bat_priv->bat_counters) |
37130293 | 800 | return -ENOMEM; |
c6c8fea2 | 801 | |
c6c8fea2 SE |
802 | atomic_set(&bat_priv->aggregated_ogms, 1); |
803 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 804 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 805 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 806 | #endif |
33af49ad AQ |
807 | #ifdef CONFIG_BATMAN_ADV_DAT |
808 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
809 | #endif |
810 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
72f7b2de LL |
811 | bat_priv->mcast.querier_ipv4.exists = false; |
812 | bat_priv->mcast.querier_ipv4.shadowing = false; | |
813 | bat_priv->mcast.querier_ipv6.exists = false; | |
814 | bat_priv->mcast.querier_ipv6.shadowing = false; | |
60432d75 | 815 | bat_priv->mcast.flags = BATADV_NO_FLAGS; |
1d8ab8d3 | 816 | atomic_set(&bat_priv->multicast_mode, 1); |
60432d75 | 817 | atomic_set(&bat_priv->mcast.num_disabled, 0); |
ab49886e | 818 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
819 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
820 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 821 | #endif |
3a24a63e AQ |
822 | atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); |
823 | atomic_set(&bat_priv->gw.sel_class, 20); | |
414254e3 ML |
824 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
825 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 826 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 827 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 828 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 829 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 830 | #endif |
c6c8fea2 | 831 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 832 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
833 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
834 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 835 | |
39c75a51 | 836 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 837 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
838 | atomic_set(&bat_priv->tt.vn, 0); |
839 | atomic_set(&bat_priv->tt.local_changes, 0); | |
840 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
841 | #ifdef CONFIG_BATMAN_ADV_BLA | |
842 | atomic_set(&bat_priv->bla.num_requests, 0); | |
843 | #endif | |
33a3bb4a AQ |
844 | atomic_set(&bat_priv->tp_num, 0); |
845 | ||
807736f6 SE |
846 | bat_priv->tt.last_changeset = NULL; |
847 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
848 | bat_priv->isolation_mark = 0; |
849 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 850 | |
ee75ed88 MH |
851 | /* randomize initial seqno to avoid collision */ |
852 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
853 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
854 | ||
c6c8fea2 SE |
855 | bat_priv->primary_if = NULL; |
856 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 857 | |
d353d8d4 MH |
858 | batadv_nc_init_bat_priv(bat_priv); |
859 | ||
37130293 | 860 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 861 | if (ret < 0) |
37130293 | 862 | goto free_bat_counters; |
c6c8fea2 | 863 | |
37130293 | 864 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 865 | if (ret < 0) |
37130293 | 866 | goto free_bat_counters; |
c6c8fea2 | 867 | |
37130293 | 868 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
869 | if (ret < 0) |
870 | goto unreg_debugfs; | |
871 | ||
37130293 | 872 | return 0; |
c6c8fea2 SE |
873 | |
874 | unreg_debugfs: | |
37130293 | 875 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
876 | free_bat_counters: |
877 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 878 | bat_priv->bat_counters = NULL; |
37130293 SE |
879 | |
880 | return ret; | |
881 | } | |
882 | ||
3dbd550b SE |
883 | /** |
884 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
885 | * @dev: batadv_soft_interface used as master interface | |
886 | * @slave_dev: net_device which should become the slave interface | |
887 | * | |
62fe710f | 888 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
889 | */ |
890 | static int batadv_softif_slave_add(struct net_device *dev, | |
891 | struct net_device *slave_dev) | |
892 | { | |
893 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 894 | struct net *net = dev_net(dev); |
3dbd550b SE |
895 | int ret = -EINVAL; |
896 | ||
897 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 898 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
899 | goto out; |
900 | ||
2cd45a06 | 901 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
902 | |
903 | out: | |
904 | if (hard_iface) | |
82047ad7 | 905 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
906 | return ret; |
907 | } | |
908 | ||
909 | /** | |
910 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
911 | * @dev: batadv_soft_interface used as master interface | |
912 | * @slave_dev: net_device which should be removed from the master interface | |
913 | * | |
62fe710f | 914 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
915 | */ |
916 | static int batadv_softif_slave_del(struct net_device *dev, | |
917 | struct net_device *slave_dev) | |
918 | { | |
919 | struct batadv_hard_iface *hard_iface; | |
920 | int ret = -EINVAL; | |
921 | ||
922 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
923 | ||
924 | if (!hard_iface || hard_iface->soft_iface != dev) | |
925 | goto out; | |
926 | ||
927 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
928 | ret = 0; | |
929 | ||
930 | out: | |
931 | if (hard_iface) | |
82047ad7 | 932 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
933 | return ret; |
934 | } | |
935 | ||
37130293 SE |
936 | static const struct net_device_ops batadv_netdev_ops = { |
937 | .ndo_init = batadv_softif_init_late, | |
938 | .ndo_open = batadv_interface_open, | |
939 | .ndo_stop = batadv_interface_release, | |
940 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
941 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
942 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
943 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
944 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 945 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 946 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
947 | .ndo_validate_addr = eth_validate_addr, |
948 | .ndo_add_slave = batadv_softif_slave_add, | |
949 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
950 | }; |
951 | ||
b3246020 SE |
952 | /** |
953 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
954 | * @dev: Device to cleanup and remove | |
955 | */ | |
956 | static void batadv_softif_free(struct net_device *dev) | |
957 | { | |
958 | batadv_debugfs_del_meshif(dev); | |
959 | batadv_mesh_free(dev); | |
0c501345 AQ |
960 | |
961 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
962 | * their tasks. Wait for them all to be finished before freeing the | |
963 | * netdev and its private data (bat_priv) | |
964 | */ | |
965 | rcu_barrier(); | |
966 | ||
b3246020 SE |
967 | free_netdev(dev); |
968 | } | |
969 | ||
37130293 SE |
970 | /** |
971 | * batadv_softif_init_early - early stage initialization of soft interface | |
972 | * @dev: registered network device to modify | |
973 | */ | |
974 | static void batadv_softif_init_early(struct net_device *dev) | |
975 | { | |
976 | struct batadv_priv *priv = netdev_priv(dev); | |
977 | ||
978 | ether_setup(dev); | |
979 | ||
980 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 981 | dev->destructor = batadv_softif_free; |
0d21cdaa | 982 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
cdf73703 | 983 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
984 | |
985 | /* can't call min_mtu, because the needed variables | |
986 | * have not been initialized yet | |
987 | */ | |
988 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
989 | |
990 | /* generate random address */ | |
991 | eth_hw_addr_random(dev); | |
992 | ||
7ad24ea4 | 993 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
994 | |
995 | memset(priv, 0, sizeof(*priv)); | |
996 | } | |
997 | ||
2cd45a06 | 998 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
999 | { |
1000 | struct net_device *soft_iface; | |
1001 | int ret; | |
1002 | ||
1003 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 1004 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
1005 | if (!soft_iface) |
1006 | return NULL; | |
1007 | ||
2cd45a06 AL |
1008 | dev_net_set(soft_iface, net); |
1009 | ||
a4ac28c0 SE |
1010 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1011 | ||
37130293 SE |
1012 | ret = register_netdevice(soft_iface); |
1013 | if (ret < 0) { | |
1014 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1015 | name, ret); | |
1016 | free_netdev(soft_iface); | |
1017 | return NULL; | |
1018 | } | |
1019 | ||
1020 | return soft_iface; | |
c6c8fea2 SE |
1021 | } |
1022 | ||
e07932ae ML |
1023 | /** |
1024 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
1025 | * @soft_iface: the to-be-removed batman-adv interface | |
1026 | */ | |
1027 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1028 | { |
5bc44dc8 | 1029 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
569c9850 SE |
1030 | struct batadv_softif_vlan *vlan; |
1031 | ||
1032 | ASSERT_RTNL(); | |
1033 | ||
1034 | /* destroy the "untagged" VLAN */ | |
1035 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1036 | if (vlan) { | |
1037 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1038 | batadv_softif_vlan_put(vlan); | |
1039 | } | |
5bc44dc8 | 1040 | |
569c9850 SE |
1041 | batadv_sysfs_del_meshif(soft_iface); |
1042 | unregister_netdevice(soft_iface); | |
c6c8fea2 SE |
1043 | } |
1044 | ||
a4ac28c0 SE |
1045 | /** |
1046 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
1047 | * @soft_iface: the to-be-removed batman-adv interface | |
1048 | * @head: list pointer | |
1049 | */ | |
1050 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1051 | struct list_head *head) | |
1052 | { | |
420cb1b7 | 1053 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
a4ac28c0 | 1054 | struct batadv_hard_iface *hard_iface; |
420cb1b7 | 1055 | struct batadv_softif_vlan *vlan; |
a4ac28c0 SE |
1056 | |
1057 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1058 | if (hard_iface->soft_iface == soft_iface) | |
1059 | batadv_hardif_disable_interface(hard_iface, | |
1060 | BATADV_IF_CLEANUP_KEEP); | |
1061 | } | |
1062 | ||
420cb1b7 SE |
1063 | /* destroy the "untagged" VLAN */ |
1064 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1065 | if (vlan) { | |
1066 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1067 | batadv_softif_vlan_put(vlan); | |
1068 | } | |
1069 | ||
a4ac28c0 SE |
1070 | batadv_sysfs_del_meshif(soft_iface); |
1071 | unregister_netdevice_queue(soft_iface, head); | |
1072 | } | |
1073 | ||
4b426b10 | 1074 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1075 | { |
0294ca0d | 1076 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1077 | return true; |
e44d8fe2 | 1078 | |
4b426b10 | 1079 | return false; |
e44d8fe2 SE |
1080 | } |
1081 | ||
a4ac28c0 SE |
1082 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1083 | .kind = "batadv", | |
1084 | .priv_size = sizeof(struct batadv_priv), | |
1085 | .setup = batadv_softif_init_early, | |
1086 | .dellink = batadv_softif_destroy_netlink, | |
1087 | }; | |
1088 | ||
c6c8fea2 | 1089 | /* ethtool */ |
0294ca0d | 1090 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
1091 | { |
1092 | cmd->supported = 0; | |
1093 | cmd->advertising = 0; | |
70739497 | 1094 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
1095 | cmd->duplex = DUPLEX_FULL; |
1096 | cmd->port = PORT_TP; | |
1097 | cmd->phy_address = 0; | |
1098 | cmd->transceiver = XCVR_INTERNAL; | |
1099 | cmd->autoneg = AUTONEG_DISABLE; | |
1100 | cmd->maxtxpkt = 0; | |
1101 | cmd->maxrxpkt = 0; | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
0294ca0d SE |
1106 | static void batadv_get_drvinfo(struct net_device *dev, |
1107 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 1108 | { |
7826d43f JP |
1109 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
1110 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
1111 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
1112 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
1113 | } |
1114 | ||
0294ca0d | 1115 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
1116 | { |
1117 | return -EOPNOTSUPP; | |
1118 | } | |
1119 | ||
0294ca0d | 1120 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
1121 | { |
1122 | } | |
1123 | ||
0294ca0d | 1124 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
1125 | { |
1126 | return 1; | |
1127 | } | |
f8214865 MH |
1128 | |
1129 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
1130 | * Declare each description string in struct.name[] to get fixed sized buffer | |
1131 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
1132 | */ | |
1133 | static const struct { | |
1134 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 1135 | } batadv_counters_strings[] = { |
1c9b0550 ML |
1136 | { "tx" }, |
1137 | { "tx_bytes" }, | |
1138 | { "tx_dropped" }, | |
1139 | { "rx" }, | |
1140 | { "rx_bytes" }, | |
f8214865 MH |
1141 | { "forward" }, |
1142 | { "forward_bytes" }, | |
1143 | { "mgmt_tx" }, | |
1144 | { "mgmt_tx_bytes" }, | |
1145 | { "mgmt_rx" }, | |
1146 | { "mgmt_rx_bytes" }, | |
ee75ed88 MH |
1147 | { "frag_tx" }, |
1148 | { "frag_tx_bytes" }, | |
610bfc6b MH |
1149 | { "frag_rx" }, |
1150 | { "frag_rx_bytes" }, | |
1151 | { "frag_fwd" }, | |
1152 | { "frag_fwd_bytes" }, | |
f8214865 MH |
1153 | { "tt_request_tx" }, |
1154 | { "tt_request_rx" }, | |
1155 | { "tt_response_tx" }, | |
1156 | { "tt_response_rx" }, | |
1157 | { "tt_roam_adv_tx" }, | |
1158 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
1159 | #ifdef CONFIG_BATMAN_ADV_DAT |
1160 | { "dat_get_tx" }, | |
1161 | { "dat_get_rx" }, | |
1162 | { "dat_put_tx" }, | |
1163 | { "dat_put_rx" }, | |
1164 | { "dat_cached_reply_tx" }, | |
1165 | #endif | |
3c12de9a MH |
1166 | #ifdef CONFIG_BATMAN_ADV_NC |
1167 | { "nc_code" }, | |
1168 | { "nc_code_bytes" }, | |
1169 | { "nc_recode" }, | |
1170 | { "nc_recode_bytes" }, | |
612d2b4f | 1171 | { "nc_buffer" }, |
2df5278b MH |
1172 | { "nc_decode" }, |
1173 | { "nc_decode_bytes" }, | |
1174 | { "nc_decode_failed" }, | |
1175 | { "nc_sniffed" }, | |
3c12de9a | 1176 | #endif |
f8214865 MH |
1177 | }; |
1178 | ||
6b5e971a | 1179 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
f8214865 MH |
1180 | { |
1181 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
1182 | memcpy(data, batadv_counters_strings, |
1183 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
1184 | } |
1185 | ||
1186 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
6b5e971a | 1187 | struct ethtool_stats *stats, u64 *data) |
f8214865 | 1188 | { |
56303d34 | 1189 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
1190 | int i; |
1191 | ||
d69909d2 | 1192 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
1193 | data[i] = batadv_sum_counter(bat_priv, i); |
1194 | } | |
1195 | ||
1196 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1197 | { | |
1198 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 1199 | return BATADV_CNT_NUM; |
f8214865 MH |
1200 | |
1201 | return -EOPNOTSUPP; | |
1202 | } |